SN75ALS056, SN75ALS057

TRAPEZOIDAL-WAVEFORM INTERFACE BUS TRANSCEIVERS

SLLS028G – AUGUST 1987 – REVISED JUNE 1998

8

POST OFFICE BOX 655303

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

temperature (unless otherwise noted)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST CONDITIONS

SN75ALS056

RECEIVER

UNIT

(INPUT)

(OUTPUT)

MIN

MAX

tPLH4

Propagation delay time,

low-to-high-level output

Bn

An

CS at 0.8 V, T/R at 0.8 V, RL1 = 390 Ω,

18

ns

tPHL4

Propagation delay time,

high-to-low-level output

Bn

An

,,

L

,

RL2 = 1.6 kΩ, CL = 30 pF, See Figure 4

18

ns

tPLZ1

Output disable time from

low level

T/R

An

CS at 0.8 V, VI(Bn) = 2 V, VL = 5 V,

RL1 = 390 Ω, RL2 not connected,

CL = 15 pF, See Figure 3

20

ns

tPZL1

Output enable time to

low level

T/R

An

CS at 0.8 V, VI(Bn) = 2 V, VL = 5 V,

RL1 = 390 Ω, RL2 = 1.6 kΩ,

CL = 30 pF, See Figure 3

40

ns

tPHZ1

Output disable time from

high level

T/R

An

CS at 0.8 V, VI(Bn) = 0, VL = 0,

RL1 = 390 Ω, RL2 not connected,

CL = 15 pF, See Figure 3

17

ns

tPZH1

Output enable time to

high level

T/R

An

CS at 0.8 V, VI(Bn) = 0, VL = 0,

RL1 not connected, RL2 = 1.6 kΩ,

CL = 30 pF, See Figure 3

15

ns

tPLZ2

Output disable time from

low level

CS

An

Bn at 2 V, T/R at 0.8 V, CL = 5 pF,

VL = 5 V, RL1 = 390 Ω,

RL2 not connected, See Figure 5

18

ns

tPZL2

Output enable time to

low level

CS

An

Bn at 2 V, T/R at 0.8 V, CL = 30 pF,

VL = 5 V, RL1 = 390 Ω, RL2 = 1.6 kΩ,

See Figure 5

15

ns

tPHZ2

Output disable time from

high level

CS

An

Bn at 0.8 V, T/R at 0.8 V, CL = 5 pF,

VL = 0, RL1 = 390 Ω,

RL2 not connected, See Figure 5

8

ns

tPZH2

Output enable time to

high level

CS

An

Bn at 0.8 V, T/R at 0.8 V, CL = 30 pF,

VL = 0, RL1 not connected,

RL2 = 1.6 kΩ, See Figure 5

17

ns

tw(NR)

Receiver noise rejection

pulse duration

Bn

An

CS at 0.8 V, T/R at 0.8 V, RL1 = 390 Ω,

RL2 = 1.6 kΩ, CL = 30 pF, VL = 5 V,

See Figure 6

3

ns