uA9637AC

DUAL DIFFERENTIAL LINE RECEIVER

SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

D Meets or Exceeds the Requirements of uA9637AC . . . D OR P PACKAGE

ANSI Standards EIA/TIA-422-B and (TOP VIEW)
EIA/TIA-423-B and ITU Recommendations
V.10 and V.11 VCC 1 8 1IN+
D Operates From Single 5-V Power Supply 1OUT 2 7 1IN –
D Wide Common-Mode Voltage Range
2OUT
GND
3 6 2IN+
2IN –
D
4 5
High Input Impedance
D TTL-Compatible Outputs
D High-Speed Schottky Circuitry
D 8-Pin Dual-in-Line and Small-Outline
Packages
D Designed to Be Interchangeable With
National DS9637A

description
The uA9637AC is a dual differential line receiver designed to meet ANSI Standards EIA/TIA-422-B and
EIA/TIA-423-B and ITU Recommendations V.10 and V.11. The line receiver utilizes Schottky circuitry and has
TTL-compatible outputs. The inputs are compatible with either a single-ended or a differential-line system. This
device operates from a single 5-V power supply and is supplied in an 8-pin dual-in-line package or small-outline
package.
The uA9637AC is characterized for operation from 0°C to 70°C.

logic symbol† logic diagram

8
8 1IN + 2
1IN + 2 7 1OUT
7 1OUT 1IN –
1IN – 6
6 2IN + 3
2IN + 3 5 2OUT
5 2OUT 2IN –
2IN –

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and

IEC Publication 617-12.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Copyright  1995, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1

uA9637AC
DUAL DIFFERENTIAL LINE RECEIVER
SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

schematics of inputs and outputs

EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS

VCC
VCC
50 Ω NOM

8 kΩ
Input

Output

Current
Source

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 15 V
Differential input voltage, VID (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 15 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Low-level output current, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, except differential input voltage, are with respect to the network ground terminal.
2. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input.

DISSIPATION RATING TABLE

TA ≤ 25°C OPERATING FACTOR TA = 70°C TA = 125°C

PACKAGE
POWER RATING ABOVE TA = 25°C POWER RATING POWER RATING
D 725 mW 5.8 mW/°C 464 mW —
P 1000 mW 8.0 mW/°C 640 mW —

2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 uA9637AC
DUAL DIFFERENTIAL LINE RECEIVER
SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

recommended operating conditions

MIN NOM MAX UNIT
Supply voltage, VCC 4.75 5 5.25 V
Common-mode input voltage, VIC ±7 V
Operating free-air temperature, TA 0 70 °C

electrical characteristics over recommended ranges of supply voltage, common-mode input

voltage, and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT
0.2
VIT + Positive going input threshold voltage
Positive-going See Note 3 V
0.4
– 0.2
VIT – Negative going input threshold voltage
Negative-going See Note 3 V
–0.4‡
Vhys Hysteresis voltage (VIT+ – VIT– ) 70 mV
VOH High-level output voltage VID = 0.2 V, IO = – 1 mA 2.5 3.5 V
VOL Low-level output voltage VID = – 0.2 V, IO = 20 mA 0.35 0.5 V
VCC = 0 to 5.5 V,, VI = 10 V 1.1 3.25
II Input current mA
See Note 4 VI = – 10 V – 1.6 – 3.25
IOS Short-circuit output current§ VO = 0, VID = 0.2 V – 40 – 75 – 100 mA
ICC Supply current VID = – 0.5 V, No load 35 50 mA
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The algebraic convention, in which the less positive (more negative) limit is designated as minimum, is used in this data sheet for threshold levels
only.
§ Only one output should be shorted at a time, and duration of the short circuit should not exceed one second.
NOTES: 3. The expanded threshold parameter is tested with a 500-Ω resistor in series with each input.
4. The input not under test is grounded.

switching characteristics, VCC = 5 V, TA = 25°C

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tPLH Propagation delay time, low- to high-level output 15 25 ns
CL = 30 pF,
pF See Figure 1
tPHL Propagation delay time, high- to low-level output 13 25 ns

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3

uA9637AC
DUAL DIFFERENTIAL LINE RECEIVER
SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

PARAMETER MEASUREMENT INFORMATION

VCC + Output VCC + 0.5 V
Input
50% 50%
Input 392 Ω (see Note B)
– 0.5 V
51 Ω tPLH tPHL

CL = 30 pF
3.92 kΩ Output 1.5 V 1.5 V
(see Note A)

TEST CIRCUIT VOLTAGE WAVEFORM

NOTES: A. CL includes probe and jig capacitance.

B. The input pulse is supplied by a generator having the following characteristics: tr ≤ 5 ns, tf ≤ 5 ns, PRR ≤ 5 MHz, duty cycle = 50%.

Figure 1. Test Circuit and Voltage Waveform

TYPICAL CHARACTERISTICS

OUTPUT VOLTAGE OUTPUT VOLTAGE

vs vs
DIFFERENTIAL INPUT VOLTAGE DIFFERENTIAL INPUT VOLTAGE
4 4
VCC = 4.75 V VCC = 5.25 V
3.5 TA = 25°C 3.5 TA = 25°C

3 3
VO – Output Voltage – V

VO – Output Voltage – V

VIC = 0 VIC = 0
2.5 2.5
VIC = ± 7 V VIC = ± 7 V
2 2

ÁÁ ÁÁ
1.5 1.5

ÁÁ ÁÁ
VIC = ± 7 V VIC = ± 7 V
VO

VO

1 1
VIC = 0 VIC = 0
0.5 0.5

0 0
– 100 – 75 – 50 – 25 0 25 50 75 100 – 100 – 75 – 50 – 25 0 25 50 75 100
VID – Differential Input Voltage – mV VID – Differential Input Voltage – mV

Figure 2 Figure 3

4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 uA9637AC
DUAL DIFFERENTIAL LINE RECEIVER
SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

TYPICAL CHARACTERISTICS

HIGH-LEVEL OUTPUT VOLTAGE LOW-LEVEL OUTPUT VOLTAGE

vs vs
HIGH-LEVEL OUTPUT CURRENT LOW-LEVEL OUTPUT CURRENT
5 0.6
VCC = 5 V VCC = 5 V
4.5 VID = 0.2 V VID = – 0.2 V
TA = 25°C TA = 25°C
0.5
VOH – High-Level Ouput Voltage – V

VOL – Low-Level Output Voltage – V

4

3.5
0.4
3

2.5 0.3

2
0.2
1.5

1
0.1
0.5

0 0
0 – 10 – 20 – 30 – 40 – 50 – 60 – 70 – 80 0 5 10 15 20 25 30 35 40
IOH – High-Level Output Current – mA IOL – Low-Level Output Current – mA
Figure 4 Figure 5

SUPPLY CURRENT
vs
SUPPLY VOLTAGE
100
No Load
90 Inputs Open
TA = 25°C
80
I CC – Supply Current – mA

70

60

50

40

30

20

10

0
0 1 2 3 4 5 6 7 8
VCC – Supply Voltage – V

Figure 6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5

uA9637AC
DUAL DIFFERENTIAL LINE RECEIVER
SLLS111B – SEPTEMBER 1980 – REVISED MAY 1995

APPLICATION INFORMATION

5V Twisted Pair 5V

1/2 uA9638AC 1/2 uA9637AC

5V

1/2 uA9637AC

Figure 7. EIA/TIA-422-B System Applications

6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 PACKAGE OPTION ADDENDUM
www.ti.com 18-Feb-2005

PACKAGING INFORMATION

Orderable Device Status (1) Package Package Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Type Drawing Qty
UA9637ACD ACTIVE SOIC D 8 75 Pb-Free CU NIPDAU Level-2-250C-1 YEAR
(RoHS)
UA9637ACDR ACTIVE SOIC D 8 2500 Pb-Free CU NIPDAU Level-2-250C-1 YEAR
(RoHS)
UA9637ACJG OBSOLETE CDIP JG 8 None Call TI Call TI
UA9637ACP ACTIVE PDIP P 8 50 Pb-Free CU NIPDAU Level-NC-NC-NC
(RoHS)
UA9637ACPSR ACTIVE SO PS 8 2000 Pb-Free CU NIPDAU Level-2-260C-1 YEAR/
(RoHS) Level-1-235C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.

(2)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.

(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.

Addendum-Page 1
 MECHANICAL DATA

MCER001A – JANUARY 1995 – REVISED JANUARY 1997

JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE

0.400 (10,16)
0.355 (9,00)

8 5

0.280 (7,11)
0.245 (6,22)

1 4
0.065 (1,65)
0.045 (1,14)

0.063 (1,60) 0.310 (7,87)

0.020 (0,51) MIN
0.015 (0,38) 0.290 (7,37)

0.200 (5,08) MAX

Seating Plane

0.130 (3,30) MIN

0.023 (0,58)
0°–15°
0.015 (0,38)
0.100 (2,54) 0.014 (0,36)
0.008 (0,20)

4040107/C 08/96

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification.
E. Falls within MIL STD 1835 GDIP1-T8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 MECHANICAL DATA

MPDI001A – JANUARY 1995 – REVISED JUNE 1999

P (R-PDIP-T8) PLASTIC DUAL-IN-LINE

0.400 (10,60)
0.355 (9,02)
8 5

0.260 (6,60)
0.240 (6,10)

1 4
0.070 (1,78) MAX

0.325 (8,26)
0.020 (0,51) MIN
0.300 (7,62)

0.015 (0,38)

Gage Plane
0.200 (5,08) MAX
Seating Plane

0.125 (3,18) MIN 0.010 (0,25) NOM

0.100 (2,54) 0.430 (10,92)

MAX
0.021 (0,53)
0.010 (0,25) M
0.015 (0,38)

4040082/D 05/98

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001

For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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