SN75ALS056, SN75ALS057

TRAPEZOIDAL-WAVEFORM INTERFACE BUS TRANSCEIVERS

SLLS028G – AUGUST 1987 – REVISED JUNE 1998

6

POST OFFICE BOX 655303

DISSIPATION RATING TABLE

PACKAGE

TA

≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 125°C

POWER RATING

DW

1025 mW

8.2 mW/

°C

656 mW

—

N

1150 mW

9.2 mW/

°C

736 mW

—

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

V

High-level driver and control input voltage, VIH

2

V

Low-level driver and control input voltage, VIL

0.8

V

Bus termination voltage

1.9

2.1

V

Operating free-air temperature, TA

0

70

°C

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

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS†

SN75ALS056

UNIT

PARAMETER

TEST CONDITIONS†

MIN

TYP†

MAX

UNIT

VIK

Input clamp voltage at An, T/R, or CS

II = –18 mA

–1.5

V

VIT

Receiver input threshold voltage at Bn

1.405

1.69

V

VOH

High-level output voltage at An

Bn at 1.2 V, CS at 0.8 V,

T/R at 0.8V, IOH = – 400 µA

2.4

V

An

Bn at 2 V ,CS at 0.8 V,

T/R at 0.8 V, IOL = 16 mA

0.5

VOL

Low-level output voltage

Bn

An at 2 V, CS at 0.8 V,

T/R at 2 V, VL = 2 V,

RL =18.5 Ω,, See Figure 1

0.75

1.2

V

An, T/R or CS

VI = VCC

40

IIH

High-level input current

Bn

VI = 2 V, VCC = 0 or 5.25 V,

An at 0.8 V, T/R at 0.8 V

100

µA

IIL

Low level input current at An, T/R, or CS

VI = 0.4 V

–400

µA

IOS

Short-circuit output current at An

An at 0, Bn at 1.2 V,

CS at 0.8 V, T/R at 0.8 V

–40

–120

mA

ICC

Supply current

75

mA

CO(B)

Driver output capacitance

4.5

pF

† Typical values are at VCC = 5 V, TA = 25°C.