1.

General description
The HEF4021B is an 8-bit static shift register (parallel-to-serial converter) with a
synchronous serial data input (DS), a clock input (CP), an asynchronous active HIGH
parallel load input (PL), eight asynchronous parallel data inputs (D0 to D7) and buffered
parallel outputs from the last three stages (Q5 to Q7).
Each register stage is a D-type master-slave flip-flop with a set direct (SD) and clear direct
(CD) input. Information on D0 to D7 is asynchronously loaded into the register while PL is
HIGH, independent of CP and DS. When PL is LOW, data on DS is shifted into the first
register position and all the data in the register is shifted one position to the right on the
LOW-to-HIGH transition of CP. Schmitt trigger action makes the clock input highly tolerant
of slower rise and fall times.
It operates over a recommended V
DD
power supply range of 3 V to 15 V referenced to V
SS

(usually ground). Unused inputs must be connected to V
DD
, V
SS
, or another input.
2. Features and benefits
Tolerant of slower rise and fall times
Fully static operation
5 V, 10 V, and 15 V parametric ratings
Standardized symmetrical output characteristics
Specified from 40 C to +125 C
Complies with J EDEC standard J ESD 13-B
3. Ordering information

HEF4021B
8-bit static shift register
Rev. 8 18 November 2011 Product data sheet
Table 1. Ordering information
All types operate from 40 C to +125 C.
Type number Package Version
Name Description
HEF4021BP DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
HEF4021BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 2 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
4. Functional diagram

Fig 1. Functional diagram
Fig 2. Logic diagram
001aae608
D
CP
SHIFT REGISTER
8-BITS
11
10
DS
9 PL
CP
SD/CD
7
D0
6
D1
5
D2
4
D3
13
D4
14
D5
15
D6
1
D7
2
Q5
12
Q6
3
Q7
D0
SD
D
CP
CD
O
FF 1
SD
D
CP
CD
O
FF 6
SD
D
CP
CD
O
FF 7
SD
D
CP
CD
O
FF 8
DS
PL
CP
D5 D6 D7
Q5 Q6 Q7
001aae610
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 3 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
5. Pinning information
5.1 Pinning

5.2 Pin description

6. Functional description

Fig 3. Pin configuration
HEF4021B
D7 V
DD
Q5 D6
Q7 D5
D3 D4
D2 Q6
D1 DS
D0 CP
V
SS
PL
001aae609
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Table 2. Pin description
Symbol Pin Description
Q5 to Q7 2, 12, 3 buffered parallel output from the last three stages
D0 to D7 7, 6, 5, 4, 13, 14,15, 1 parallel data input
V
SS
8 ground supply voltage
PL 9 parallel load input
CP 10 clock input (LOW-to-HIGH edge-triggered)
DS 11 serial data input
V
DD
16 supply voltage
Table 3. Function table
[1]
Number of clock
transitions
Inputs Outputs
CP DS PL Q5 Q6 Q7
Serial operation
1 | data 1 L X X X
2 | data 2 L X X X
3 | data 3 L X X X
6 | X L data 1 X X
7 | X L data 2 data 1 X
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Product data sheet Rev. 8 18 November 2011 4 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
[1] H =HIGH voltage level; L =LOW voltage level; X =dont care;
| =LOW to HIGH clock transition; + =HIGH to LOW clock transition;
data n =data (HIGH or LOW) on the DS input at the n
th
| CP transition.
7. Limiting values

[1] For DIP16 package: P
tot
derates linearly with 12 mW/K above 70 C.
[2] For SO16 package: P
tot
derates linearly with 8 mW/K above 70 C.
8. Recommended operating conditions

8 | X L data 3 data 2 data 1
+ X L no change no change no change
Parallel operation
X X H D5 D6 D7
Table 3. Function table
[1]
continued
Number of clock
transitions
Inputs Outputs
CP DS PL Q5 Q6 Q7
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
V
DD
supply voltage 0.5 +18 V
I
IK
input clamping current V
I
<0.5 V or V
I
>V
DD
+0.5 V - 10 mA
V
I
input voltage 0.5 V
DD
+0.5 V
I
OK
output clamping current V
O
<0.5V or V
O
>V
DD
+0.5 V - 10 mA
I
I/O
input/output current - 10 mA
I
DD
supply current - 50 mA
T
stg
storage temperature 65 +150 C
T
amb
ambient temperature 40 +125 C
P
tot
total power dissipation T
amb
40 C to +125 C
DIP16 package
[1]
- 750 mW
SO16 package
[2]
- 500 mW
P power dissipation per output - 100 mW
Table 5. Recommended operating conditions
Symbol Parameter Conditions Min Typ Max Unit
V
DD
supply voltage 3 - 15 V
V
I
input voltage 0 - V
DD
V
T
amb
ambient temperature in free air 40 - +125 C
At/AV input transition rise and fall rate V
DD
=5 V - - 3.75 s/V
V
DD
=10 V - - 0.5 s/V
V
DD
=15 V - - 0.08 s/V
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 5 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
9. Static characteristics

10. Dynamic characteristics

Table 6. Static characteristics
V
SS
= 0 V; V
I
= V
SS
or V
DD
unless otherwise specified.
Symbol Parameter Conditions V
DD
T
amb
= 40 C T
amb
= 25 C T
amb
= 85 C T
amb
= 125 C Unit
Min Max Min Max Min Max Min Max
V
IH
HIGH-level
input voltage
,I
O
, <1 A 5 V 3.5 - 3.5 - 3.5 - 3.5 - V
10 V 7.0 - 7.0 - 7.0 - 7.0 - V
15 V 11.0 - 11.0 - 11.0 - 11.0 - V
V
IL
LOW-level
input voltage
,I
O
, <1 A 5 V - 1.5 - 1.5 - 1.5 - 1.5 V
10 V - 3.0 - 3.0 - 3.0 - 3.0 V
15 V - 4.0 - 4.0 - 4.0 - 4.0 V
V
OH
HIGH-level
output
voltage
,I
O
, <1 A 5 V 4.95 - 4.95 - 4.95 - 4.95 - V
10 V 9.95 - 9.95 - 9.95 - 9.95 - V
15 V 14.95 - 14.95 - 14.95 - 14.95 - V
V
OL
LOW-level
output
voltage
,I
O
, <1 A 5 V - 0.05 - 0.05 - 0.05 - 0.05 V
10 V - 0.05 - 0.05 - 0.05 - 0.05 V
15 V - 0.05 - 0.05 - 0.05 - 0.05 V
I
OH
HIGH-level
output current
V
O
=2.5 V 5 V - 1.7 - 1.4 - 1.1 - 1.1 mA
V
O
=4.6 V 5 V - 0.64 - 0.5 - 0.36 - 0.36 mA
V
O
=9.5 V 10 V - 1.6 - 1.3 - 0.9 - 0.9 mA
V
O
=13.5 V 15 V - 4.2 - 3.4 - 2.4 - 2.4 mA
I
OL
LOW-level
output current
V
O
=0.4 V 5 V 0.64 - 0.5 - 0.36 - 0.36 - mA
V
O
=0.5 V 10 V 1.6 - 1.3 - 0.9 - 0.9 - mA
V
O
=1.5 V 15 V 4.2 - 3.4 - 2.4 - 2.4 - mA
I
I
input leakage
current
V
DD
=15 V 15 V - 0.1 - 0.1 - 1.0 - 1.0 A
I
DD
supply
current
I
O
=0 A 5 V - 5 - 5 - 150 - 150 A
10 V - 10 - 10 - 300 - 300 A
15 V - 20 - 20 - 600 - 600 A
C
I
input
capacitance
- - - - 7.5 - - - - pF
Table 7. Dynamic characteristics
V
SS
= 0 V; T
amb
= 25 C; for test circuit see Figure 7; unless otherwise specified.
Symbol Parameter Conditions V
DD
Extrapolation formula Min Typ Max Unit
t
PHL
HIGH to LOW
propagation delay
CP to Qn
see Figure 4
5 V
[1]
98 ns +(0.55 ns/pF)C
L
- 125 250 ns
10 V 44 ns +(0.23 ns/pF)C
L
- 55 110 ns
15 V 32 ns +(0.16 ns/pF)C
L
- 40 80 ns
PL to Qn
see Figure 4
5 V 93 ns +(0.55 ns/pF)C
L
- 120 240 ns
10 V 44 ns +(0.23 ns/pF)C
L
- 55 110 ns
15 V 32 ns +(0.16 ns/pF)C
L
- 40 80 ns
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 6 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (C
L
in pF).
t
PLH
LOW to HIGH
propagation delay
CP to Qn
see Figure 4
5 V
[1]
88 ns +(0.55 ns/pF)C
L
- 115 230 ns
10 V 39 ns +(0.23 ns/pF)C
L
- 50 100 ns
15 V 32 ns +(0.16 ns/pF)C
L
- 40 80 ns
PL to Qn
see Figure 4
5 V 78 ns +(0.55 ns/pF)C
L
- 105 210 ns
10 V 39 ns +(0.23 ns/pF)C
L
- 50 100 ns
15 V 32 ns +(0.16 ns/pF)C
L
- 40 80 ns
t
t
transition time Qn; see Figure 4 5 V
[1]
10 ns +(1.00 ns/pF)C
L
- 60 120 ns
10 V 9 ns +(0.42 ns/pF)C
L
- 30 60 ns
15 V 6 ns +(0.28 ns/pF)C
L
- 20 40 ns
t
su
set-up time DS to CP;
see Figure 5
5 V +25 15 - ns
10 V +25 10 - ns
15 V +15 5 - ns
Dn to PL;
see Figure 6
5 V 50 25 - ns
10 V 30 10 - ns
15 V 20 5 - ns
t
h
hold time DS to CP;
see Figure 5
5 V 40 20 - ns
10 V 20 10 - ns
15 V 15 8 - ns
Dn to PL;
see Figure 6
5 V +15 10 - ns
10 V 15 0 - ns
15 V 15 0 - ns
t
W
pulse width CP =LOW;
minimumwidth;
see Figure 5
5 V 70 35 - ns
10 V 30 15 - ns
15 V 24 12 - ns
PL =HIGH;
minimumwidth;
see Figure 6
5 V 70 35 - ns
10 V 30 15 - ns
15 V 24 12 - ns
t
rec
recovery time PL input;
see Figure 6
5 V 50 10 - ns
10 V 40 5 - ns
15 V 35 5 - ns
f
clk(max)
maximum clock
frequency
CP input;
see Figure 5
5 V 6 13 - MHz
10 V 15 30 - MHz
15 V 20 40 - MHz
Table 7. Dynamic characteristics continued
V
SS
= 0 V; T
amb
= 25 C; for test circuit see Figure 7; unless otherwise specified.
Symbol Parameter Conditions V
DD
Extrapolation formula Min Typ Max Unit
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 7 of 15
NXP Semiconductors HEF4021B
8-bit static shift register

11. Waveforms

Table 8. Dynamic power dissipation P
D
P
D
can be calculated from the formulas shown. V
SS
= 0 V; t
r
= t
f
s 20 ns; T
amb
= 25 C.
Symbol Parameter V
DD
Typical formula for P
D
(W) where:
P
D
dynamic power
dissipation
5 V P
D
=900 f
i
+E(f
o
C
L
) V
DD
2
f
i
=input frequency in MHz,
f
o
=output frequency in MHz,
C
L
=output load capacitance in pF,
V
DD
=supply voltage in V,
E(f
o
C
L
) =sum of the outputs.
10 V P
D
=4300 f
i
+E(f
o
C
L
) V
DD
2
15 V P
D
=12000 f
i
+E(f
o
C
L
) V
DD
2
Fig 4. Waveforms showing propagation delays for CP and PL inputs to Qn output and Qn transition times
Fig 5. Waveforms showing minimum clock pulse width, set-up time, and hold time for CP and DS.
001aaj060 t
t
CP or PL INPUT
Qn OUTPUT V
M
V
DD
V
SS
V
OH
V
OL
V
M
V
X
V
Y
t
t
t
PHL
t
PLH
001aae611
V
M
V
DD
V
SS
V
DD
V
SS
1 / f
clk(max)
V
M
CP INPUT
DS INPUT
t
su
t
h
t
W
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 8 of 15
NXP Semiconductors HEF4021B
8-bit static shift register

Set-up times and hold times are shown as positive values but may be specified as negative values;
Measurement points are given in Table 9.
Fig 6. Waveforms showing minimum pulse width and recovery time for PL; set-up and hold times for Dn to PL.
001aae612
t
su
t
h
t
r
t
W
t
rec
CP INPUT
PL INPUT
Dn INPUT V
M
V
M
V
DD
V
SS
V
DD
V
SS
V
DD
V
SS
V
M
10 %
90 %
t
f
Table 9. Measurement points
Supply voltage Input Output
V
DD
V
M
V
M
V
X
V
Y
5 V to 15 V 0.5V
DD
0.5V
DD
0.1V
DD
0.9V
DD
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 9 of 15
NXP Semiconductors HEF4021B
8-bit static shift register


a. Input waveform
b. Test circuit
Test data is given in Table 10.
Definitions for test circuit:
DUT =Device Under Test.
C
L
=load capacitance including jig and probe capacitance.
R
T
=termination resistance should be equal to the output impedance Z
o
of the pulse generator.
Fig 7. Test circuit for measuring switching times
V
M
V
M
t
W
t
W
10 %
90 %
10 %
90 %
0 V
V
I
V
I
negative
pulse
positive
pulse
0 V
V
M
V
M
90 %
10 %
90 %
10 %
t
f
t
r
t
r
t
f
001aaj781
V
DD
V
I
V
O
001aag182
DUT
C
L R
T
G
Table 10. Test data
Supply voltage Input Load
V
DD
V
I
t
r
, t
f
C
L
5 V to 15 V V
SS
or V
DD
s 20 ns 50 pF
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 10 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
12. Package outline

Fig 8. Package outline SOT38-4 (DIP16)
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC JEDEC JEITA
SOT38-4
95-01-14
03-02-13
M
H
c
(e )
1
M
E
A
L
s
e
a
t
i
n
g

p
l
a
n
e
A
1
w M
b
1
b
2
e
D
A
2
Z
16
1
9
8
E
pin 1 index
b
0 5 10 mm
scale
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
UNIT
A
max.
1 2
b
1
(1) (1)
(1)
b
2
c D E e M
Z
H
L
mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
min.
A
max.
b
max.
w M
E
e
1
1.73
1.30
0.53
0.38
0.36
0.23
19.50
18.55
6.48
6.20
3.60
3.05
0.254 2.54 7.62
8.25
7.80
10.0
8.3
0.76 4.2 0.51 3.2
inches
0.068
0.051
0.021
0.015
0.014
0.009
1.25
0.85
0.049
0.033
0.77
0.73
0.26
0.24
0.14
0.12
0.01 0.1 0.3
0.32
0.31
0.39
0.33
0.03 0.17 0.02 0.13
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 11 of 15
NXP Semiconductors HEF4021B
8-bit static shift register

Fig 9. Package outline SOT109-1 (SO16)
X
w M

A
A
1
A
2
b
p
D
H
E
L
p
Q
detail X
E
Z
e
c
L
v M A
(A )
3
A
8
9
1
16
y
pin 1 index
UNIT
A
max.
A
1
A
2
A
3
b
p
c D
(1)
E
(1) (1)
e H
E
L L
p
Q Z y w v
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC JEDEC JEITA
mm
inches
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
1.27
6.2
5.8
0.7
0.6
0.7
0.3
8
0
o
o
0.25 0.1
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
1.0
0.4
SOT109-1
99-12-27
03-02-19
076E07 MS-012
0.069
0.010
0.004
0.057
0.049
0.01
0.019
0.014
0.0100
0.0075
0.39
0.38
0.16
0.15
0.05
1.05
0.041
0.244
0.228
0.028
0.020
0.028
0.012
0.01
0.25
0.01 0.004
0.039
0.016
0 2.5 5 mm
scale
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 12 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
13. Revision history

Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
HEF4021B v.8 20111118 Product data sheet - HEF4021B v.7
Modifications: Legal pages updated.
Changes in General description and Features and benefits.
Section Applications removed.
HEF4021B v.7 20111010 Product data sheet - HEF4021B v.6
HEF4021B v.6 20091127 Product data sheet - HEF4021B v.5
HEF4021B v.5 20090707 Product data sheet - HEF4021B v.4
HEF4021B v.4 20081110 Product data sheet - HEF4021B_CNV v.3
HEF4021B_CNV v.3 19950101 Product specification - HEF4021B_CNV v.2
HEF4021B_CNV v.2 19950101 Product specification - -
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 13 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
14. Legal information
14.1 Data sheet status

[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term short data sheet is explained in section Definitions.
[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
14.2 Definitions
Draft The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
14.3 Disclaimers
Limited warranty and liability Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Suitability for use NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customers own risk.
Applications Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customers sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customers applications and
products planned, as well as for the planned application and use of
customers third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customers applications or products, or the application or use by customers
third party customer(s). Customer is responsible for doing all necessary
testing for the customers applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customers third party
customer(s). NXP does not accept any liability in this respect.
Limiting values Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customers general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
No offer to sell or license Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Export control This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Document status
[1][2]
Product status
[3]
Definition
Objective [short] data sheet Development This document contains data from the objective specification for product development.
Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
Product [short] data sheet Production This document contains the product specification.
HEF4021B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 8 18 November 2011 14 of 15
NXP Semiconductors HEF4021B
8-bit static shift register
Non-automotive qualified products Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors specifications such use shall be solely at customers
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors
standard warranty and NXP Semiconductors product specifications.
14.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
15. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
NXP Semiconductors HEF4021B
8-bit static shift register
NXP B.V. 2011. All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 18 November 2011
Document identifier: HEF4021B
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section Legal information.
16. Contents
1 General description . . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information . . . . . . . . . . . . . . . . . . . . . 1
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 3
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Functional description . . . . . . . . . . . . . . . . . . . 3
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Recommended operating conditions. . . . . . . . 4
9 Static characteristics . . . . . . . . . . . . . . . . . . . . . 5
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 5
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 10
13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 12
14 Legal information. . . . . . . . . . . . . . . . . . . . . . . 13
14.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 13
14.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
14.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
14.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
15 Contact information. . . . . . . . . . . . . . . . . . . . . 14
16 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15