Datasheet SN75ALS175N, SN75ALS175NS, SN75ALS175NSLE, SN75ALS175NSR Datasheet (Texas Instruments)

SN75ALS175

QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Meets or Exceeds the Requirements of
ANSI EIA/TIA-422-B, EIA/TIA-423-B, and
RS-485

D

Meets ITU Recommendations V.10, V.11,
X.26, and X.27

D

Designed for Multipoint Bus Transmission
on Long Bus Lines in Noisy Environments

D

Low Supply Current Requirement

27 mA Max

D

Common-Mode Input Voltage Range of
–12 V to 12 V

D

Input Sensitivity...±200 mV

D

Input Hysteresis...50 mV Typ

D

High Input Impedance...12 kΩ Min

D

Operates From Single 5-V Supply

description

The SN75ALS175 is a monolithic quadruple differential line receiver with 3-state outputs. It is designed to meet
the requirements of ANSI Standards EIA/TIA-422-B, EIA/TIA-423-B, and RS-485 and several ITU
recommendations. Advanced low-power Schottky technology provides high speed without the usual power
penalty. Each of the two pairs of receivers has a common active-high enable. The device features high input
impedance, input hysteresis for increased noise immunity, and input sensitivity of ±200 mV over a
common-mode input voltage range of –12 V to 12 V.

The SN75ALS175 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each receiver)

DIFFERENTIAL INPUTS

ENABLES OUTPUT

A – B EN Y

VID ≥ 0.2 V H H

–0.2 V < VID < 0.2 V H ?

VID ≤ – 0.2 V H L

X L Z

Open Circuit H H

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

Copyright  1995, Texas Instruments Incorporated

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.

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.

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

1B
1A
1Y

1,2EN

2Y
2A
2B

GND

V

CC

4B
4A
4Y
3,4EN
3Y
3A
3B

N OR NS† PACKAGE

(TOP VIEW)

†

The NS package is only available left-ended taped and reeled
(order device SN75ALS175NSLE).

SN75ALS175
QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol

†

4Y

3Y

2Y

1Y

4B

4A

3B

3A

3,4EN

2B

2A

1B

1A

1,2EN

13

11

5

3

15

14

9

10

12

7

6

1

2

4

EN

EN

†

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

logic diagram (positive logic)

2B

2A

1B

1A

1,2EN

2Y

1Y

3

5

4B

4A

3B

3A

3,4EN

13

11

3Y

4Y15

14

9

10

12

7

6

1

2

4

schematics of inputs and outputs

TYPICAL OF ALL OUTPUTSEQUIVALANT OF EACH ENABLE INPUTEQUIVALANT OF EACH A OR B INPUT

70 Ω

GND

Output

V

CC

GND

V

CC

V

CC

288 kΩ

NOM

GND

Input

VCC (A)

or

GND (B)

17 kΩ

NOM

17 kΩ
NOM

17 kΩ
NOM

EN

Input

SN75ALS175

QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

†

Supply voltage, V

CC

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

Input voltage, V

I

(A or B inputs) ±14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Differential input voltage, V

ID

(see Note 2) ±14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enable input voltage, V

I

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low-level output current, I

OL

50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Operating free-air temperature range, T

A

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

Storage temperature range, T

stg

–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 network ground terminal.

2. Differential-input voltage is measured at the noninverting input with respect to the corresponding inverting input.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

N 1150 mW 9.2 mW/°C 736 mW

NS 625 mW 5.0 mW/°C 400 mW

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, V

CC

4.75 5 5.25 V

Common-mode input voltage, V

IC

±12 V

Differential input voltage, V

ID

±12 V

High-level enable-input voltage, V

IH

2 V

Low-level enable-input voltage, V

IL

0.8 V

High-level output current, I

OH

–400 µA

Low-level output current, I

OL

8 mA

Operating free-air temperature, T

A

0 70 °C

SN75ALS175
QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended ranges of common-mode input voltage, supply
voltage and operating free-air temperature (unless otherwise noted) (see Note 3)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

V

IT+

Positive-going input threshold voltage 200 mV

V

IT–

Negative-going input threshold
voltage

–200

‡

mV

V

hys

Hysteresis voltage (V

IT+

– V

IT–

) 50 mV

V

IK

Enable-input clamp voltage II = –18 mA –1.5 V

V

OH

High-level output voltage VID = 200 mV , IOH = –400 µA, See Figure 1 2.7 V

V

OL

Low-level output voltage VID = –200 mV, IOL = 8 mA, See Figure 1 0.45 V

I

OZ

High-impedance-state output current VO = 0.4 V to 2.4 V ±20 µA

p

p

VI = 12 V 1

IILine input current

Other input at 0 V

,

See Note 3

VI = –7 V –0.8

mA

I

IH

High-level enable-input current V

IH(E)

= 2.7 V 20 µA

I

IL

Low-level enable-input current V

IL(E)

= 0.4 V –100 µA

r

i

Input resistance 12 kΩ

I

OS

Short-circuit output current VO = 0 –15 –85 mA

p

p

No load, Outputs enabled 16 24

ICCSuply current (total package)

No load, Outputs disabled 18 27

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 voltage
levels only.

NOTE 3: Refer to ANSI Standard RS-485 for exact conditions.

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

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

t

PHL

Propagation delay time, high- to low-level output VID = –2.5 V to 2.5 V , 9 18 27 ns

t

PLH

Propagation delay time, low- to high-level output CL = 15 pF, See Figure 2 9 18 27 ns

t

PZH

Output enable time to high level

p

4 12 18 ns

t

PZL

Output enable time to low level

C

L

= 15 pF,

See Figure 3

6 13 21 ns

t

PHZ

Output disable time from high level

p

10 21 27 ns

t

PLZ

Output disable time from low level

C

L

=

15 pF

,

See Figure 3

8 15 25 ns

†

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

SN75ALS175

QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

V

OH

(–)

I

OH

(+)

I

OL

2 V

V

ID

V

OL

Figure 1. VOH, V

OL

V

OL

V

OH

0 V

3 V

Output

Input

t

PHL

t

PLH

1.3 V1.3 V

1.5 V1.5 V

CL = 15 pF

(see Note B)

1.5 V

2 V

TEST CIRCUIT VOLTAGE WAVEFORMS

50 Ω

Output

Generator

(see Note A)

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, duty cycle = 50%, tr = tf = 6 ns.

B. CL includes probe and jig capacitance.

Figure 2. Propagation Delay Times

SN75ALS175
QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MA Y 1995

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

1.5 V

VOLTAGE WAVEFORMS

TEST CIRCUIT

t

PLZ

t

PZL

1.4 V

t

PHZ

SW2 Closed

t

PHZ

Output

Input 1.5 V

0 V

V

OH

3 V

SW1 to 1.5 V

SW3 Closed

SW3 Closed

SW2 Open

SW1 to 1.5 V

t

PZH

3 V

t

PZH

0 V

V

OH

0 V

1.5 V

1.5 V

Input

Output Output

3 V

SW3 Closed

1.4 V

0 V

V

OL

t

PZL

SW1 to –1.5 V
SW2 Closed

1.5 V

4.5 V

SW3 Open

SW2 Closed

SW1 to –1.5 V

t

PZL

1.5 V

5 V

SW2

See Note C

SW3

5 kΩ

51 Ω

SW 1

–1.5 V

1.5 V

V

OL

0 V

Output

CL = 15 pF

(see Note B)

Output

2 kΩ

0.5 V

0.5 V

Generator

(see Note A)

3 V

Input

3 V

Input

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, duty cycle = 50%, tr = tf = 6 ns.

B. CL includes probe and jig capacitance.

C. All diodes are 1N916 or equivalent.

Figure 3. Enable and Disable Times

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