SN75ALS056, SN75ALS057

TRAPEZOIDAL-WAVEFORM INTERFACE BUS TRANSCEIVERS

SLLS028G – AUGUST 1987 – REVISED JUNE 1998

7

POST OFFICE BOX 655303

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

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

SN75ALS057

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

Input clamp voltage at Dn, En, TE, or RE

II = –18 mA

–1.5

V

VIT

Receiver input threshold voltage at Bn

1.41

1.69

V

VOH

High-level output voltage at Rn

Bn at 1.2 V, RE at 0.8 V,

IOH = –400 µA

2.4

V

Rn

Bn at 2 V, RE at 0.8 V,

IOL = 16 mA

0.5

VOL

Low-level output voltage

Bn

Dn at 2 V, En at 2 V,

TE at 0.8 V, VL = 2 V,

RL = 18.5 Ω, See Figure 1

0.75

1.2

V

Dn, En,

TE, or RE

VI = VCC

40

IIH

High-level input current

Bn

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

Dn at 0.8 V, En at 0.8 V,

TE at 0.8 V

100

µA

IIL

Low-level input current at Dn, En, TE, or RE

VI = 0.4 V

–400

µA

IOS

Short-circuit output current at Rn

Rn at 0, Bn at 1.2 V,

RE at 0.8 V

–40

–120

mA

ICC

Supply current

40

mA

CO(B)

Driver output capacitance

4.5

pF

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

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

temperature (unless otherwise noted)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST CONDITIONS

SN75ALS056

DRIVER

UNIT

(INPUT)

(OUTPUT)

MIN

TYP†

MAX

tPLH1

Propagation delay time,

low-to-high-level output

CS

Bn

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

RL118 Ω CL 30 pF

24

ns

tPHL1

Propagation delay time,

high-to-low-level output

CS

Bn

RL1 = 18 Ω,, CL = 30 pF,

RL2 not connected, See Figure 2

20

ns

tPLH2

Propagation delay time,

low-to-high-level output

An

Bn

CS at 0.8 V, T/R at 2 V,

VL = 2 V, RL1 = 18 Ω,,

RL2 not connected CL 30 pF

19

ns

tPHL2

Propagation delay time

high-to-low-level output

An

Bn

RL2 not connected, CL = 30 pF,

See Figure 2,

18

ns

tPLH3

Propagation delay time,

low-to-high-level output

T/R

Bn

VI(An) = 5 V, CS at 0.8 V,

RL1 = 18 Ω, CL = 30 pF,

RL2 not connected VL =2V

25

ns

tPHL3

Propagation delay time,

high-to-low-level output

T/R

Bn

RL2 not connected, VL = 2 V,

See Figure 3,

35

ns

tTLH

Transition time,

low-to-high-level output

An

Bn

CS at 0.8 V, T/R at 2 V,

VL = 2 V, CL = 30 pF,

1

3

11

ns

tTHL

Transition time,

high-to-low-level output

An

Bn

L

,

L

,

RL1 = 18 Ω, RL2 not connected,

See Figure 2

1

3

6

ns

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