SN55ALS161, SN75ALS161

OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS

SLLS019E – JUNE 1986 – REVISED NOVEMBER 1999

7

POST OFFICE BOX 655303

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

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS†

SN55ALS161

SN75ALS161

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

MIN

TYP‡

MAX

UNIT

VIK

Input clamp voltage

II = –18 mA

–0.8

–1.5

–0.8

–1.5

V

Hysteresis

Bus

0.4

0.65

Vhys

Hysteresis

voltage

Bus

VCC = 5 V,

TA = – 55°C and 25°C

0.4

0.55

V

y

(VIT+ – VIT–)

Bus

VCC = 5 V,

TA = 125°C

0.25

§

Terminal

IOH = – 800 µA, VCC = MIN

TA = 25°C

and MAX

2.7

3.5

2.7

3.5

VOH§

High-level

output

OH

µ ,

CC

TA = MIN

2.5

3.5

2.7

3.5

V

VOH§ output

voltage

Bus

IOH = – 5.2 mA, VCC = MIN

TA = 25°C

and MAX

2.2

2.2

V

OH

,

CC

TA = MIN

2.0

2.2

VOL

Low-level

output

Terminal

IOL = 16 mA,

VCC = MIN

0.3

0.5

0.3

0.5

V

VOL

output

voltage

Bus

IOL = 48 mA¶,

VCC = MIN

0.35

0.5

0.35

0.5

V

II

Input current

at maximum

input voltage

Terminal

VI = 5.5 V,

VCC = MAX

0.2

100

0.2

100

µA

IIH

High-level

input current

Terminal

and

VI = 2.7 V,

VCC = MAX

0.1

20

0.1

20

µA

IIL

Low-level

input current

control

inputs

VI = 0.5 V,

VCC = MAX

–30

–100

–10

–100

µA

VI/O

Voltage at GPIB I/O port

Driver disabled,

VCC 5V

II(bus) = 0

2.5

3

3.7

2.5

3

3.7

V

VI/O

Voltage at GPIB I/O port

VCC = 5 V

(SN55’)

II(bus) = –12 mA

–1.5

–1.5

V

VI(bus) = –1.5 V to 0.4 V

–1.3

–1.3

D i

di

bl d

VI(bus) = 0.4 V to 2.5 V

0

–3.2

0

–3.2

II/O

Current into

GPIB I/O

Power

on

Driver disabled,

VCC = 5 V

(SN55’)

VI(bus) = 2.5 V to 3.7 V

2.5

–3.2

2.5

–3.2

mA

I/O

port

(SN55 )

VI(bus) = 3.7 V to 5 V

0

2.5

0

2.5

VI(bus) = 5 V to 5.5 V

0.7

2.5

0.7

2.5

Power off

VCC = 0

VI(bus) = 0 to 2.5 V

40

40

µA

IOS§

Short-circuit

output

Terminal

VCC = MAX

–15

–35

–75

–15

–35

–75

mA

IOS§

output

current

Bus

VCC = MAX

–25

–50

–125

–25

–50

–125

mA

ICC

Supply current

No load,

TE and DC low,

VCC = MAX

55

90

55

75

mA

CI/O

GPIB I/O port

capacitance

VCC = 0 to 5 V,

VI/O = 0 to 2 V, f = 1 MHz

30

30

pF

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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

§ VOH and IOS apply to 3-state outputs only.

¶ For SN55’, IOL = 24 mA at –55°C.