SN55ALS161, SN75ALS161

OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS

SLLS019E – JUNE 1986 – REVISED NOVEMBER 1999

11

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

LOAD CIRCUIT

VOLTAGE WAVEFORMS

VOL

VOH

0 V

3 V

1.5 V

1.5 V

1.5 V

1.5 V

Terminal

Output

Test Point

From (Terminal)

Output Under

Test

4.3 V

tPLH

tPHL

[7 V]

240

Ω

[500

Ω]

CL = 30 pF

= [50 pF]

(see Note A)

3 k

Ω

[500

Ω]

[ ] denotes the SN55ALS161 military test conditions.

NOTES: A. CL includes probe and jig capacitance.

B. 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.

Bus Input

(see Note B)

Figure 2. Bus-to-Terminal Load Circuit and Voltage Waveforms