Datasheet SN75ALS181N, SN75ALS181NS, SN75ALS181NSLE, SN75ALS181NSR Datasheet (Texas Instruments)

SN75ALS181

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Meets TIA/EIA-422-B, TIA/EIA-485-A, and
CCITT Recommendations V.11 and X.27

D

Low Supply-Current Requirements

30 mA Max

D

Driver Output Capacity...±60 mA

D

Thermal Shutdown Protection

D

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

D

Receiver Input Impedance...12 kΩ Min

D

Receiver Input Sensitivity...±200 mV

D

Receiver Input Hysteresis...60 mV Typ

D

Receiver Common-Mode Input Voltage
Range of ±12 V

D

Operates From Single 5-V Supply

D

Glitch-Free Power-Up and Power-Down
Protection

description

The SN75ALS181 is a differential driver and receiver pair designed for bidirectional data communication on
multipoint bus transmission lines. The design provides for balanced transmission lines and meets
TIA/EIA-422-B and TIA/EIA-485-A, and CCITT recommendations V.10, V.11, X.26, and X.27.

The SN75ALS181 combines a 3-state differential line driver and a differential-input line receiver that operate
from a single 5-V power supply . The driver and receiver have active-high and active-low enables, respectively ,
that can be externally connected together to function as a direction control. The driver differential outputs and
the receiver differential inputs are connected to separate pins for greater flexibility and are designed to offer
minimum loading to the bus when the driver is disabled or V

CC

= 0. These ports feature wide positive and

negative common-mode voltage changes, making the device suitable for party-line applications.
The SN75ALS181 is characterized for operation from 0°C to 70°C.

Copyright  1998, 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

14
13
12
11
10

9
8

NC

R
RE
DE

D

GND
GND

V

CC

V

CC

A
B
Z
Y
NC

N OR NS† PACKAGE

(TOP VIEW)

NC – No internal connection

†

The NS package is only available in left-end taped
and reeled (order device SN75ALS181NSLE).

SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Function Tables

EACH DRIVER

INPUT ENABLE

OUTPUTS

D DE

Y Z

H H H L
L H L H
X L Z Z

EACH RECEIVER

DIFFERENTIAL

ENABLE OUTPUT

A – B RE Y

VID ≥ 0.2 V L H

–0.2 V < VID < 0.2 V L ?

VID ≤ – 0.2 V L L

X H Z

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

logic symbol

†

EN1

EN2

2

1

1

9

10

12
11

4
5

3
2

DE

D

RE

R

Y

Z

A

B

†

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

logic diagram (positive logic)

4

5
3

2

9

10

12
11

DE

D

RE

R

Y
Z

A
B

SN75ALS181

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

schematics of inputs

TYPICAL OF RECEIVER INPUT

V

CC

NOM

288 kΩ

GND

Input

VCC (A)

or

GND (B)

17 kΩ
NOM

NOM

1.7 kΩ

NOM

1.7 kΩ

EQUIVALENT OF EACH DRIVER INPUT

Input

V

CC

35 kΩ
NOM

schematics of outputs

TYPICAL OF DRIVER OUTPUT TYPICAL OF RECEIVER OUTPUT

Output

V

CC

70 Ω
NOM

Output

V

CC

GND

SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

4

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, DE, RE

, and D inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, driver –9 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, receiver –14 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver differential input voltage range (see Note 2) –14 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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 terminal with respect to the inverting terminal.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

OPERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

N 1150 mW 9.2 mW/°C 736 mW

NS 625 mW 4.0 mW/° C 445 mW

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, V

CC

4.75 5 5.25 V
Common-mode output voltage, VOC (see Note 3) Driver –7 12 V
Common-mode input voltage, VIC (see Note 3) Receiver –12 12 V
High-level input current, V

IH

D, DE, and RE 2 V

Low-level input current, V

IL

D, DE, and RE 0.8 V

Differential input voltage, V

ID

±12 V

p

Driver –60 mA

High-level output current, I

OH

Receiver –400 µA

p

Driver 60 mA

Low-level output current, I

OL

Receiver 8 mA

Operating free-air temperature, T

A

0 70 °C

NOTE 3: The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this table for common-mode

output voltage level only .

SN75ALS181

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

DRIVER SECTION

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

Input clamp voltage II = –18 mA –1.5 V

V

O

Output voltage IO = 0 0 6 V

|V

OD1

| Differential output voltage IO = 0 1.5 6 V

p

V

= 5 V,

1/2 V

OD1

|V

OD2

|

Differential output voltage

CC

,

RL = 100 Ω

See Figure 1

2

V

|V

OD2

| Differential output voltage RL = 54 Ω 1.5 2.3 5

|V

OD3

| Differential output voltage V

test

= –7 V to 12 V, See Figure 2 1.5 5 V

∆|VOD|

Change in magnitude of differential output
voltage (see Note 4)

±0.2 V

p

3

VOCCommon-mode output voltage

R

L

=

54 Ω or 100 Ω

,

See Figure 1

–1

V

∆|VOC|

Change in magnitude of common-mode
output voltage (see Note 4)

±0.2 V

I

OZ

High-impedance-state output current VO = –7 V to 12 V, See Note 5 ±100 µA

I

IH

High-level input current VIH = 2.4 V 20 µA

I

IL

Low-level input current VIL = 0.4 V –100 µA

VO = –7 V –250

p

VO = V

CC

250

IOSShort-circuit output current

VO = 12 V 250

mA

VO = 0 V –150

pp

p

Outputs enabled 21 30

ICCSupply current (total package)

No load

Outputs disabled 14 21

mA

NOTES: 4. ∆|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.

5. This applies for both power on and power off. Refer to TIA/EIA-485-A for exact conditions.

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

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

t

dD

Differential output delay time, t

dDH

or t

dDL

9 13 20

t

sk(p)

Pulse skew (|t

dDH

– t

dDL

|)

RL = 54 Ω, CL = 50 pF, See Figure 3

1 8

ns

t

t

Differential output transition time 3 10 16

t

PZH

Output enable time to high level RL = 110 Ω, See Figure 4 36 53 ns

t

PZL

Output enable time to low level RL = 110 Ω, See Figure 5 39 56 ns

t

PHZ

Output disable time from high level RL = 110 Ω, See Figure 4 20 31 ns

t

PLZ

Output disable time from low level RL = 110 Ω, See Figure 5 9 20 ns

†

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

SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

RECEIVER SECTION

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

V

T+

Positive-going threshold voltage,
differential input

VO = 2.7 V, IO = –0.4 mA 0.2 V

V

T–

Negative-going threshold voltage,
differential input

VO = 0.5 V, IO = 8 mA See Note 8 –0.2 V

V

hys

Input hysteresis (VT+ – VT–) 60 mV

V

IK

Input clamp voltage, RE II = –18 mA –1.5 V

V

OH

High-level output voltage VID = 200 mV , IOH = –400 µA, See Figure 6 2.7 V

V

OL

Low-level output voltage VID = –200 mV, IOL = 8 mA, See Figure 6 0.45 V

I

OZ

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

p

Other input at 0 V ,

VI = 12 V 1

IILine input current

,

See Note 5

VI = –7 V –0.8

mA

I

IH

High-level input current, RE VIH = 2.7 V 20 µA

I

IL

Low-level input current, RE VIL = 0.4 V –100 µA

r

i

Input resistance 12 kΩ

I

OS

Short-circuit output current VID = 200 mV , VO = 0 V –15 –85 mA

pp

p

Outputs enabled 21 30

ICCSupply current (total package)

No load

Outputs disabled 14 21

mA

NOTE 5: This applies for both power on and power off. Refer to TIA/EIA-485-A for exact conditions.

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C

L

= 15 pF (unless otherwise noted) (see Figure 7)

PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT

t

PHL

Propagation delay time, high-to-low-level output VID = –1.5 V to 1.5 V 10 16 25 ns

t

PLH

Propagation delay time, low-to-high-level output VID = –1.5 V to 1.5 V 10 16 25 ns

t

sk(p)

Pulse skew (|t

PLH

– t

PHL

|) VID = –1.5 V to 1.5 V 1 8 ns

t

PZH

Output enable time to high level 7 15 ns

t

PZL

Output enable time to low level 9 19 ns

t

PHZ

Output disable time from high level 18 27 ns

t

PLZ

Output disable time from low level 10 15 ns

†

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

SN75ALS181

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

V

OD2

V

OC

R

L

2

R

L

2

Figure 1. Driver Test Circuit, VOD and V

OC

V

OD3

V

test

375 Ω

375 Ω

60 Ω

Figure 2. Driver Circuit, V

OD3

0 V

3 V

t

f

10%

90%

t

r

1.5 V

t

dDH

50%

Output

Input

TEST CIRCUIT VOLTAGE WAVEFORMS

t

dDL

RL =
54 Ω

CL = 50 pF
(see Note B)

3 V

Generator

(see Note A)

50 Ω

1.5 V 1.5 V

50%

≈ 2.5 V
≈ – 2.5 V

Output

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

ZO=50Ω.

B. CL includes probe and jig capacitance.

Figure 3. Driver Differential-Output Delay and Transition Times

SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT VOLTAGE WAVEFORMS

1.5 V

V

OH

t

PHZ

t

PZH

0 V

3 V

1.5 V

2.3 V

Output

Input

Output

S1

0 V or 3 V

(see Note B)

CL= 50 pF

110 Ω

RL =

50 Ω

(see Note A)

Generator

V

off

≈ 0 V

0.5 V

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

ZO = 50 Ω.

B. CL includes probe and jig capacitance.

Figure 4. Driver Enable and Disable Times

TEST CIRCUIT VOLTAGE WAVEFORMS

V

OL

t

PLZ

t

PZL

5 V

0.5 V

2.3 V

0 V

3 V

1.5 V1.5 V

5 V

Output

Input

Output

S1

0 V or 3 V

(see Note B)

CL= 50 pF

50 Ω

(see Note A)

Generator

RL = 110 Ω

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

ZO = 50 Ω.

B. CL includes probe and jig capacitance.

Figure 5. Driver Enable and Disable Times

–I

OH

V

OH

+I

OL

V

OL

V

ID

Figure 6. Receiver, VOH and V

OL

SN75ALS181

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

9

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT VOLTAGE WAVEFORMS

V

OL

V

OH

3 V

0 V

t

PHL

t

PLH

Output

Input

1.5 V

1.3 V

1.5 V

1.3 V

51 Ω

(see Note B)

CL = 15 pF

Output

0 V

1.5 V

(see Note A)

Generator

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

ZO = 50 Ω.

B. CL includes probe and jig capacitance.

Figure 7. Receiver Propagation-Delay Times

SN75ALS181
DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS152A – DECEMBER 1992 – REVISED JUNE 1998

10

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

VOLTAGE WAVEFORMS

2 kΩ

S2

5 V

S3

1N916 or Equivalent5 kΩ

(see Note B)

CL = 15 pF

50 Ω

S1

1.5 V

– 1.5 V

t

PZL

1.5 V

1.5 V

3 V

0 V

V

OL

S1 to – 1.5 V
S2 Closed
S3 Open

t

PZH

1.5 V

1.5 V

Input

0 V

3 V

Output

0 V

V

OH

V

OL

0.5 V

1.5 V
0 V

3 V

S1 to – 1.5 V
S2 Closed
S3 Closed

t

PLZ

V

OH

t

PHZ

3 V

0 V

1.5 V

0.5 V

Input

Output

≈ 1.3 V

Input

Output

Input

Output

≈ 4.5 V

≈ 1.3 V

S1 to 1.5 V
S2 Open
S3 Closed

S1 to 1.5 V
S2 Open
S3 Closed

(see Note A)

Generator

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

ZO = 50 Ω.

B. CL includes probe and jig capacitance.

Figure 8. Receiver Output Enable and Disable Times

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Copyright  1998, Texas Instruments Incorporated