SN65ALS176, SN75ALS176, SN75ALS176A, SN75ALS176B

DIFFERENTIAL BUS TRANSCEIVERS

SLLS040G – AUGUST 1987 – REVISED DECEMBER 1999

5

POST OFFICE BOX 655303

DRIVER SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

VIK

Input clamp voltage

II = – 18 mA

– 1.5

V

VO

Output voltage

IO = 0

0

6

V

| VOD1 |

Differential output voltage

IO = 0

1.5

6

V

| VOD2 |

Differential output voltage

RL = 100 Ω,

See Figure 1

1/2 VOD1

or 2§

V

OD2

g

RL = 54 Ω,

See Figure 1

1.5

2.5

5

V

VOD3

Differential output voltage

Vtest = – 7 V to 12 V,

See Figure 2

1.5

5

V

∆| VOD |

Change in magnitude of differential

output voltage ¶

±0.2

V

VOC

Common mode output voltage

RL =54 Ω or 100 Ω

See Figure 1

3

V

VOC

Common-mode output voltage

RL = 54 Ω or 100 Ω,

See Figure 1

–1

V

∆| VOC |

Change in magnitude of

common-mode output voltage¶

±0.2

V

IO

Output current

Outputs disabled,

VO = 12 V

1

mA

IO

Output current

,

See Note 4

VO = – 7 V

– 0.8

mA

IIH

High-level input current

VI = 2.4 V

20

µA

IIL

Low-level input current

VI = 0.4 V

– 400

µA

#

VO = – 4 V

SN65ALS176

250

#

VO = – 6 V

SN75ALS176

– 250

IOS

Short-circuit output current#

VO = 0

– 150

mA

VO = VCC

250

VO = 8 V

250

ICC

Supply current

No load

Outputs enabled

23

30

mA

ICC

Supply current

No load

Outputs disabled

19

26

mA

† The power-off measurement in TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.

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

§ The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2 V, whichever is greater.

¶

∆ | VOD | and ∆ | VOC | are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from one logic state

to the other.

# Duration of the short circuit should not exceed one second for this test.

NOTE 4: This applies for power on and power off. Refer to TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does not apply for a

combined driver and receiver terminal.