Texas Instruments SN75172DW, SN75172N Datasheet

INPUT

SN75172

QUADRUPLE DIFFRENTIAL LINE DRIVER

SLLS038B – OCTOBER 1980 – REVISED MA Y 1995

D

Meets or Exceeds the Requirements of
ANSI Standards EIA/TIA-422-B and RS-485
and ITU Recommendation V.11

D

Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments

D

3-State Outputs

D

Common-Mode Output Voltage Range of
–7 V to 12 V

D

Active-High and Active-Low Enables

D

Thermal Shutdown Protection

D

Positive- and Negative-Current Limiting

D

Operates From Single 5-V Supply

D

Logically Interchangeable With AM26LS31

description

The SN75172 is a monolithic quadruple
differential line driver with 3-state outputs. It is
designed to meet the requirements of ANSI
Standards EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11. The device is optimized
for balanced multipoint bus transmission at rates
of up to 4 megabaud. Each driver features wide
positive and negative common-mode output
voltage ranges, making it suitable for party-line
applications in noisy environments.

N PACKAGE
(TOP VIEW)

1A

1

1Y

2

1Z

3

G

4
5

2Z

6

2Y

7

2A

GND

GND

8

DW PACKAGE

(TOP VIEW)

1A

1

1Y

2

NC

3

1Z

4

G

5

2Z

6

NC

7

2Y

8

2A

9
10

NC – No internal connection

16
15
14
13
12
11
10

20
19
18
17
16
15
14
13
12
11

V

CC

4A
4Y
4Z
G
3Z
3Y

9

3A

V

CC

4A
4Y
NC
4Z
G
3Z
NC
3Y
3A

The SN75172 provides positive- and negative-current limiting and thermal shutdown for protection from line
fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of approximately
150°C. This device offers optimum performance when used with the SN75173 or SN75175 quadruple
differential line receivers.

The SN75172 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each driver)

INPUT

A

H H X H L

L H XLH

H XLHL

L XLLH

X LHZZ

H = high level, L = low level, X = irrelevant,
Z = high impedance (off)

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.

ENABLES OUTPUTS

G G Y Z

PRODUCTION DATA information is current as of publication date.
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

Copyright  1995, Texas Instruments Incorporated

1

SN75172
QUADRUPLE DIFFRENTIAL LINE DRIVER

SLLS038B – OCTOBER 1980 – REVISED MA Y 1995

4
12

1

7

9

15

†

≥1

EN

2

1Y

3

1Z

6

2Y

5

2Z

10

3Y

11

3Z

14

4Y

13

4Z

logic diagram (positive logic)

4

G

12

G

1

1A

7

2A

9

3A

15

4A

10
11

14
13

2

1Y

3

1Z

6

2Y

5

2Z

3Y
3Z

4Y
4Z

‡

(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

logic symbol

G
G

1A

2A

3A

4A

†

This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.

Terminal numbers shown are for the N package.

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

Supply voltage, V

Voltage range at any bus terminal –10 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage, V

5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T
Storage temperature range, T

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

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.

NOTE 1: All voltage values are with respect to the network ground terminal.

DISSIPATION RATING TABLE

PACKAGE

DW 1125 mW 9.0 mW/°C 720 mW

N 1150 mW 9.2 mW/°C 736 mW

2

TA ≤ 25°C

POWER RATING

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

R

100 Ω

See Figure 1

OD1

V

V

C

¶

R

100 Ω

See Figure 1

V

ICCSupply current (all drivers)

No load

mA

SN75172

QUADRUPLE DIFFRENTIAL LINE DRIVER

SLLS038B – OCTOBER 1980 – REVISED MA Y 1995

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, V
High-level input voltage, V
Low-level input voltage, V
Common-mode output voltage, V
High-level output current, I
Low-level output current, I
Operating free-air temperature, T

CC

IH

IL

OC

OH

OL

A

electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

V

IK

V

O

V

OH

V

OL

|V

|V

V

OD3

∆|VOD|

OC

∆|VOC|
I

O

I

OZ

I

IH

I

IL

I

OS

†

All typical values are at VCC = 5 V and TA = 25°C.

‡

The minimum V

§

∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low
level.

¶

In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage,
VOS.

NOTE 2: See Figure 3-5 of EIA Standard RS-485.

Input clamp voltage II = –18 mA –1.5 V
Output voltage IO = 0 0 6 V
High-level output voltage VIH = 2 V, VIL = 0.8 V, IOH = –33 mA 3.7 V
Low-level output voltage VIH = 2 V, VIL = 0.8 V, IOH = 33 mA 1.1 V

| Differential output voltage IO = 0 1.5 6 V

OD1

=

| Differential output voltage

OD2

Differential output voltage See Note 2 1.5 5 V
Change in magnitude of

differential output voltage

ommon-mode output voltage

Change in magnitude of
common-mode output voltage

Output current with power off VCC = 0, VO = – 7 V to 12 V ±100 µA
High-impedance-state

output current
High-level input current VI = 2.7 V 20 µA
Low-level input current VI = 0.5 V –360 µA

Short-circuit output current

pp

with a 100-Ω load is either 1/2 V

OD2

§

§

L

RL = 54 Ω, See Figure 1 1.5 2.5 5 V

= 54 Ω or

L

VO = – 7 V to 12 V ±100 µA

VO = – 7 V –180
VO = V
VO = 12 V 500

,

,

CC

Outputs enabled 38 60
Outputs disabled 18 40

or 2 V, whichever is greater.

OD1

4.75 5 5.25 V
2 V

–7 to 12 V

0 70 °C

1/2 V

OD1

‡

or 2

0.8 V

–60 mA

60 mA

±0.2 V

+3

–1

±0.2 V

mA

180

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