SN75ALS056, SN75ALS057

TRAPEZOIDAL-WAVEFORM INTERFACE BUS TRANSCEIVERS

SLLS028G – AUGUST 1987 – REVISED JUNE 1998

12

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

VOLTAGE WAVEFORMS

RL2

VL

RL1

O

V

CL (includes jig capacitance)

(Bn,An)

SN75ALS056

VI(T/R)

VI(An, Bn)

1.55 V

1.5 V

1.55 V

1.5 V

tPZH1

tPZL1

tPLH3

1.5 V

3 V

0

tPHL3

VI(T/R)

1.5 V

tPLZ1

tPHZ1

0.5 V

0.5 V

VO(Bn)

VO(An)

VO(An)

5 V

15 pF

390

Ω

S1

S1 Closed

S2 Open

S1 Open

S2 Closed

S2

1.6 k

Ω

NOTE A: tr = tf ≤ 5 ns from 10% to 90%

Figure 3. Propagation Delay From T/R to An or Bn Test Circuit and Voltage Waveforms