Features

• Fast Read Access Time - 45 ns

• Low-Power CMOS Operation
– 100 µA max. Standby
– 20 mA max. Active at 5 MHz
• JEDEC Standard Packages
– 28-Lead 600-mil PDIP
– 32-Lead PLCC
– 28-Lead TSOP and SOIC
• 5V ± 10% Supply
• High-Reliability CMOS Technology
– 2,000V ESD Protection
512K (64K x 8)
– 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 100 µs/byte (typical) OTP EPROM
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Commercial, Industrial and Automotive Temperature Ranges
AT27C512R
Description
The AT27C512R is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It requires only one 5V
power supply in normal read mode operation. Any byte can be accessed in less than
45 ns, eliminating the need for speed reducing WAIT states on high-performance
microprocessor systems.
Atmel’s scaled CMOS technology provides high-speed, lower active power consump-
tion, and significantly faster programming. Power consumption is typically only 8 mA
in Active Mode and less than 10 µA in Standby.
(continued)
PDIP, SOIC Top View
Pin Configurations
Pin Name Function A15 1 28 VCC
A12 2 27 A14
A7 3 26 A13
A0 to A15 Addresses A6 4 25 A8
A5 5 24 A9
O0 - O7 Outputs A4 6 23 A11
A3 7 22 OE/VPP
CE Chip Enable A2 8 21 A10
A1 9 20 CE
OE/VPP Output Enable/VPP A0
O0
10
11
19
18
O7
O6
512K EPROM
NC No Connect O1 12 17 O5
O2 13 16 O4
GND 14 15 O3

PLCC Top View

TSOP Top View
VCC
A12
A15

A14
A13
NC
A7

Type 1
4
3
2
1
32
31
30

A6 5 29 A8
A5 6 28 A9 OE/VPP 22 21 A10
A4 7 27 A11 A11 23 20 CE
A3 8 26 NC A9 24 19 O7
A2 9 25 OE/VPP A8 25 18 O6
A1 10 24 A10 A13 26 17 O5
A0 11 23 CE A14 27 16 O4
NC 12 22 O7 VCC 28 15 O3
O0 13 21 O6 A15 1 14 GND
14
15
16
17
18
19
20

A12 2 13 O2
A7 3 12 O1
O1
O2
GND
NC
O3
O4
O5

A6 4 11 O0
A5 5 10 A0
A4 6 9 A1
A3 7 8 A2 Rev. 0015I–07/98
Note: PLCC Package Pins 1 and
17 are DON’T CONNECT.

1
The AT27C512R is available in a choice of industry stan- System Considerations
dard JEDEC-approved one-time programmable (OTP)
Switching between active and standby conditions via the
plastic PDIP, PLCC, SOIC, and TSOP packages. All
Chip Enable pin may produce transient voltage excursions.
devices feature two-line control (CE, OE) to give designers
Unless accommodated by the system design, these tran-
the flexibility to prevent bus contention.
sients may exceed data sheet limits, resulting in device
With 64K byte storage capability, the AT27C512R allows non-conformance. At a minimum, a 0.1 µF high frequency,
firmware to be stored reliably and to be accessed by the low inherent inductance, ceramic capacitor should be uti-
system without the delays of mass storage media. lized for each device. This capacitor should be connected
Atmel’s 27C512R has additional features to ensure high between the V CC and Ground terminals of the device, as
quality and efficient production use. The Rapid™ Program- close to the device as possible. Additionally, to stabilize the
ming Algorithm reduces the time required to program the supply voltage level on printed circuit boards with large
part and guarantees reliable programming. Programming EPROM arrays, a 4.7 µF bulk electrolytic capacitor should
time is typically only 100 µs/byte. The Integrated Product be utilized, again connected between the VCC and Ground
Identification Code electronically identifies the device and terminals. This capacitor should be positioned as close as
manufacturer. This feature is used by industry standard possible to the point where the power supply is connected
programming equipment to select the proper programming to the array.
algorithms and voltages.

2 AT27C512R
 AT27C512R

Block Diagram

Absolute Maximum Ratings*

Temperature Under Bias ............................... -55°C to + 125°C *NOTICE: Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to
Storage Temperature .................................... -65°C to + 150°C the device. This is a stress rating only and func-
tional operation of the device at these or any other
Voltage on Any Pin with conditions beyond those indicated in the opera-
Respect to Ground ........................................-2.0V to + 7.0V(1) tional sections of this specification is not implied.
Exposure to absolute maximum rating conditions
Voltage on A9 with for extended periods may affect device reliability.
Respect to Ground .....................................-2.0V to + 14.0V(1)
Note: 1. Minimum voltage is -0.6V dc which may undershoot
to -2.0V for pulses of less than 20 ns. Maximum
VPP Supply Voltage with
Respect to Ground ......................................-2.0V to + 14.0V(1) output pin voltage is VCC + 0.75V dc which may
overshoot to +7.0 volts for pulses of less than 20 ns.

Operating Modes
Mode\Pin CE OE/VPP Ai Outputs
Read VIL VIL Ai DOUT
(1)
Output Disable VIL VIH X High Z
(1)
Standby VIH X X High Z
(2)
Rapid Program VIL VPP Ai DIN
PGM Inhibit VIH VPP X(1) High Z
(3)
A9 =VH
Product Identification(4) VIL VIL A0 = VIH or VIL Identification Code
A1 - A15 = VIL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics.
3. VH = 12.0 ± 0.5V.
4. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low
(VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.

3
DC and AC Operating Conditions for Read Operation
AT27C512R
-45 -55 -70 -90 -12 -15
Com. 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C
Operating
Ind. -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C
Temp.(Case)
Auto. -40°C - 125°C -40°C - 125°C -40°C - 125°C -40°C - 125°C
VCC Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units
Com., Ind, ±1 µA
ILI Input Load Current VIN = 0V to VCC
Auto. ±5 µA

Output Leakage Com., Ind, ±5 µA

ILO VOUT = 0V to VCC
Current Auto. ±10 µA

VCC(1) Standby ISB1 (CMOS), CE = VCC ± 0.3V 100 µA

ISB
Current ISB2 (TTL), CE = 2.0 to VCC + 0.5V 1 mA
ICC VCC Active Current f = 5 MHz, IOUT = 0 mA, CE = VIL 20 mA
VIL Input Low Voltage -0.6 0.8 V
VIH Input High Voltage 2.0 VCC + 0.5 V
VOL Output Low Voltage IOL = 2.1 mA 0.4 V
VOH Output High Voltage IOH = -400 µA 2.4 V
Notes: 1. VCC must be applied simultaneously with or before OE/VPP, and removed simultaneously with or after OE/VPP..

AC Characteristics for Read Operation

AT27C512R
-45 -55 -70 -90 -12 -15
Symbol Parameter Condition Min Max Min Max Min Max Min Max Min Max Min Max Units
tACC(3) Address to Output Delay CE= OE/VPP = VIL 45 55 70 90 120 150 ns
(2)
tCE CE to Output Delay OE/VPP = VIL 45 55 70 90 120 150 ns
(2)(3)
tOE OE/VPP to Output Delay CE = VIL 20 25 30 35 35 40 ns
OE/VPP or CE High to Output Float, whichever
tDF(4)(5) 20 20 25 25 30 35 ns
occurred first
Output Hold from Address, CE or OE/VPP,
tOH 7 7 7 0 0 0 ns
whichever occurred first
Notes: 2, 3, 4, 5. - see AC Waveforms for Read Operation.

4 AT27C512R
 AT27C512R

AC Waveforms for Read Operation(1)

Notes: 1. Timing measurement reference level is 1.5V for -45 and -55 devices. Input AC drive levels are VIL = 0.0V and VIH = 3.0V.
Timing measurement reference levels for all other speed grades are V OL = 0.8V and VOH = 2.0V. Input AC drive levels are
VIL = 0.45V and VIH = 2.4V.
2. OE/VPP may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE.
3. OE/VPP may be delayed up to tACC - tOE after the address is valid without impact on tACC.
4. This parameter is only sampled and is not 100% tested.
5. Output float is defined as the point when data is no longer driven.

Input Test Waveforms and Output Test Load

Measurement Levels
For -45 and -55 devices only:

tR, tF < 5 ns (10% to 90%)

Note: CL = 100 pF including jig
For -70, -90, -12, -15, and -20 devices:
capacitance, except for
the -45 and -55 devices,
where CL = 30 pF.

tR, tF < 20 ns (10% to 90%)

Pin Capacitance
(f = 1 MHz T = 25°C) (1)
Typ Max Units Conditions
CIN 4 6 pF VIN = 0V
COUT 8 12 pF VOUT = 0V
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

5
Programming Waveforms(1)

Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH.
2. tOE and tDFP are characteristics of the device but must be accommodated by the programmer.

DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V
Limits
Symbol Parameter Test Conditions Min Max Units
ILI Input Load Current VIN = VIL,VIH ±10 µA
VIL Input Low Level -0.6 0.8 V
VIH Input High Level 2.0 VCC + 1 V
VOL Output Low Voltage IOL = 2.1 mA 0.4 V
VOH Output High Voltage IOH = -400 µA 2.4 V
ICC2 VCC Supply Current (Program and Verify) 25 mA
IPP2 OE/VPP Current CE = VIL 25 mA
VID A9 Product Identification Voltage 11.5 12.5 V

6 AT27C512R
 AT27C512R

AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V
Limits
(1)
Symbol Parameter Test Conditions Min Max Units
tAS Address Setup Time 2 µs
tOES OE/VPP Setup Time 2 µs
tOEH OE/VPP Hold Time 2 µs
Input Rise and Fall Times
tDS Data Setup Time (10% to 90%) 20ns 2 µs
tAH Address Hold Time 0 µs
Input Pulse Levels
tDH Data Hold Time 2 µs
0.45V to 2.4V
CE High to
tDFP 0 130 ns
Output Float Delay(2) Input Timing Reference Level
tVCS VCC Setup Time 0.8V to 2.0V 2 µs
tPW CE Program Pulse Width (3)
95 105 µs
Output Timing Reference Level
tDV Data Valid from CE (2)
1 µs
0.8V to 2.0V
tVR OE/VPP Recovery Time 2 µs
OE/VPP Pulse Rise
tPRT 50 ns
Time During Programming
Notes: 1. VCC must be applied simultaneously or before OE/VPP and removed simultaneously or after OE/VPP.
2. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven—
see timing diagram.
3. Program Pulse width tolerance is 100 µsec ± 5%.

Atmel’s 27C512R Integrated Product Identification Code

Pins
Hex
Codes A0 O7 O6 O5 O4 O3 O2 O1 O0 Data
Manufacturer 0 0 0 0 1 1 1 1 0 1E
Device Type 1 0 0 0 0 1 1 0 1 0D

7
Rapid Programming Algorithm
A 100 µs CE pulse width is used to program. The address pulse. If the byte fails to verify after 10 pulses have been
is set to the first location. VCC is raised to 6.5V and OE/VPP applied, the part is considered failed. After the byte verifies
is raised to 13.0V. Each address is first programmed with properly, the next address is selected until all have been
one 100 µs CE pulse without verification. Then a verifica- checked. OE/VPP is then lowered to VIL and VCC to 5.0V. All
tion/reprogramming loop is executed for each address. In bytes are read again and compared with the original data to
the event a byte fails to pass verification, up to 10 succes- determine if the device passes or fails.
sive 100 µs pulses are applied with a verification after each

8 AT27C512R
 AT27C512R

Ordering Information
tACC ICC (mA)
(ns) Active Standby Ordering Code Package Operation Range
45 20 0.1 AT27C512R-45JC 32J Commercial
AT27C512R-45PC 28P6 (0°C to 70°C)
AT27C512R-45RC 28R
AT27C512R-45TC 28T
20 0.1 AT27C512R-45JI 32J Industrial
AT27C512R-45PI 28P6 (-40°C to 85°C)
AT27C512R-45RI 28R
AT27C512R-45TI 28T
55 20 0.1 AT27C512R-55JC 32J Commercial
AT27C512R-55PC 28P6 (0°C to 70°C)
AT27C512R-55RC 28R
AT27C512R-55TC 28T
20 0.1 AT27C512R-55JI 32J Industrial
AT27C512R-55PI 28P6 (-40°C to 85°C)
AT27C512R-55RI 28R
AT27C512R-55TI 28T
70 20 0.1 AT27C512R-70JC 32J Commercial
AT27C512R-70PC 28P6 (0°C to 70°C)
AT27C512R-70RC 28R
AT27C512R-70TC 28T
20 0.1 AT27C512R-70JI 32J Industrial
AT27C512R-70PI 28P6 (-40°C to 85°C)
AT27C512R-70RI 28R
AT27C512R-70TI 28T
20 0.1 AT27C512R-70JA 32J Automotive
AT27C512R-70PA 28P6 (-40°C to 125°C)
AT27C512R-70RA 28R

(continued)

Package Type
32J 32-Lead, Plastic J-Leaded Chip Carrier (PLCC)
28P6 28-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
28R 28-Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC)
28T 28-Lead, Thin Small Outline Package (TSOP)

9
Ordering Information (Continued)
tACC ICC (mA)
(ns) Active Standby Ordering Code Package Operation Range
90 20 0.1 AT27C512R-90JC 32J Commercial
AT27C512R-90PC 28P6 (0°C to 70°C)
AT27C512R-90RC 28R
AT27C512R-90TC 28T
20 0.1 AT27C512R-90JI 32J Industrial
AT27C512R-90PI 28P6 (-40°C to 85°C)
AT27C512R-90RI 28R
AT27C512R-90TI 28T
20 0.1 AT27C512R-90JA 32J Automotive
AT27C512R-90PA 28P6 (-40°C to 125°C)
AT27C512R-90RA 28R
120 20 0.1 AT27C512R-12JC 32J Commercial
AT27C512R-12PC 28P6 (0°C to 70°C)
AT27C512R-12RC 28R
AT27C512R-12TC 28T
20 0.1 AT27C512R-12JI 32J Industrial
AT27C512R-12PI 28P6 (-40°C to 85°C)
AT27C512R-12RI 28R
AT27C512R-12TI 28T
20 0.1 AT27C512R-12JA 32J Automotive
AT27C512R-12PA 28P6 (-40°C to 125°C)
AT27C512R-12RA 28R
150 20 0.1 AT27C512R-15JC 32J Commercial
AT27C512R-15PC 28P6 (0°C to 70°C)
AT27C512R-15RC 28R
AT27C512R-15TC 28T
20 0.1 AT27C512R-15JI 32J Industrial
AT27C512R-15PI 28P6 (-40°C to 85°C)
AT27C512R-15RI 28R
AT27C512R-15TI 28T
20 0.1 AT27C512R-15JA 32J Automotive
AT27C512R-15PA 28P6 (-40°C to 125°C)
AT27C512R-15RA 28R

Package Type
32J 32-Lead, Plastic J-Leaded Chip Carrier (PLCC)
28P6 28-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
28R 28-Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC)
28T 28-Lead, Thin Small Outline Package (TSOP)

10 AT27C512R
 AT27C512R

Packaging Information
32J, 32-Lead, Plastic J-Leaded Chip Carrier (PLCC) 28P6, 28-Lead, 0.600" Wide, Plastic Dual Inline
Dimensions in Inches and (Millimeters) Package (PDIP)
JEDEC STANDARD MS-016 AE Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-011 AB

1.47(37.3)
.045(1.14) X 45° .025(.635) X 30° - 45° 1.44(36.6) PIN
PIN NO. 1
.012(.305) 1
IDENTIFY
.008(.203)

.530(13.5) .566(14.4)
.553(14.0) .530(13.5)
.490(12.4)
.032(.813) .547(13.9)
.595(15.1) .021(.533)
.026(.660)
.585(14.9) .013(.330)
.090(2.29)
1.300(33.02) REF MAX
.050(1.27) TYP .030(.762) .220(5.59) .005(.127)
.300(7.62) REF .015(3.81) MAX MIN
.430(10.9) .095(2.41)
.390(9.90) .060(1.52) SEATING
AT CONTACT PLANE
.140(3.56) .065(1.65)
POINTS .120(3.05) .161(4.09) .015(.381)
.125(3.18)
.022(.559)
.065(1.65) .014(.356)
.110(2.79) .041(1.04)
.022(.559) X 45° MAX (3X) .090(2.29)
.630(16.0)
.590(15.0)
.453(11.5) 0 REF
.447(11.4) .012(.305) 15
.495(12.6) .008(.203)
.485(12.3) .690(17.5)
.610(15.5)

28R, 28-Lead, 0.330" Wide, Plastic Gull Wing Small 28T, 28-Lead, Plastic Thin Small Outline Package
Outline (SOIC) (TSOP)
Dimensions in Inches and (Millimeters) Dimensions in Millimeters and (Inches)*

INDEX
MARK
AREA
11.9 (0.469) 13.7 (0.539)
11.7 (0.461) 13.1 (0.516)

0.55 (0.022) 0.27 (0.011)

BSC 0.18 (0.007)

7.15 (0.281)
REF

8.10 (0.319) 1.25 (0.049)

7.90 (0.311) 1.05 (0.041)

0.20 (0.008)
0.10 (0.004)
0
5 REF 0.20 (0.008)
0.15 (0.006)

0.70 (0.028)
0.30 (0.012)

*Controlling dimension: millimeters

11
 Atmel Headquarters Atmel Operations
Corporate Headquarters Atmel Colorado Springs
2325 Orchard Parkway 1150 E. Cheyenne Mtn. Blvd.
San Jose, CA 95131 Colorado Springs, CO 80906
TEL (408) 441-0311 TEL (719) 576-3300
FAX (408) 487-2600 FAX (719) 540-1759
Europe Atmel Rousset
Atmel U.K., Ltd. Zone Industrielle
Coliseum Business Centre 13106 Rousset Cedex, France
Riverside Way TEL (33) 4 42 53 60 00
Camberley, Surrey GU15 3YL FAX (33) 4 42 53 60 01
England
TEL (44) 1276-686677
FAX (44) 1276-686697
Asia
Atmel Asia, Ltd.
Room 1219
Chinachem Golden Plaza
77 Mody Road
Tsimshatsui East
Kowloon, Hong Kong
TEL (852) 27219778
FAX (852) 27221369
Japan
Atmel Japan K.K.
Tonetsu Shinkawa Bldg., 9F
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
TEL (81) 3-3523-3551
FAX (81) 3-3523-7581
Fax-on-Demand
North America:
1-(800) 292-8635
International:
1-(408) 441-0732

e-mail
literature@atmel.com

Web Site
http://www.atmel.com

BBS
1-(408) 436-4309

© Atmel Corporation 1998.

Atmel Cor poration makes no warranty for the use of its products, other than those expressly contained in the Company’s standard war-
ranty which is detailed in Atmel’s Terms and Conditions located on the Company’s website. The Company assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual prop-
er ty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are
not authorized for use as critical components in life suppor t devices or systems.
® ™
Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation.
Printed on recycled paper.
Terms and product names in this document may be trademarks of others.
0015I–07/98/xM