SN75ALS171, SN75ALS171A

TRIPLE DIFFERENTIAL BUS TRANSCEIVERS

SLLS056D – AUGUST 1987 – REVISED SEPTEMBER 1995

13

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

VOLTAGE WAVEFORMS

2 k

Ω

S2

5 V

S3

1N916 or Equivalent

5 k

Ω

CL = 15 pF

(see Note B)

50

Ω

S1

1.5 V

– 1.5 V

Generator

(see Note A)

tPZL

1.5 V

1.5 V

3 V

0 V

VOL

S1 to – 1.5 V

S2 Closed

S3 Open

tPZH

1.5 V

1.5 V

S1 to 1.5 V

S2 Open

S3 Closed

Input

0 V

3 V

Output

0 V

VOH

VOL

0.5 V

1.5 V

0 V

3 V

S1 to – 1.5 V

S2 Closed

S3 Closed

tPLZ

VOH

tPHZ

S1 to 1.5 V

S2 Closed

S3 Closed

3 V

0 V

1.5 V

0.5 V

Input

Output

≈ 1.3 V

Input

Output

Input

Output

≈ 4.5 V

≈ 1.3 V

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR

≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns,

tf ≤ 6 ns, ZO = 50 Ω.

B. CL includes probe and jig capacitance.

Figure 10. Receiver Test Circuit and Voltage Waveforms