SN100KT5538

OCTAL ECLTOTTL TRANSLATOR

WITH OPENCOLLECTOR OUTPUTS

SDZS011 − APRIL 1990

4

POST OFFICE BOX 655303

POST OFFICE BOX 1443

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

LOAD CIRCUIT

−950 mV

−1690 mV

Test Point

R1

CL

(See Note A)

7 V

tPLH

tPHL

tPLH

VOLTAGE WAVEFORMS

TTL-INPUT PROPAGATION DELAY TIMES

VOH

VOH

VOL

VOL

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

3 V

0

Input

(See Note B)

Out-of-Phase

Output

In-Phase

Output

tPLH

tPHL

tPHL

tPLH

VOLTAGE WAVEFORMS

ECL-INPUT PROPAGATION DELAY TIMES

VOH

VOH

VOL

VOL

50%

50%

1.5 V

1.5 V

1.5 V

1.5 V

Input

(See Note C)

Out-of-Phase

Output

In-Phase

Output

tPHL

R2

tr

tf

80%

20%

80%

20%

NOTES: A. CL includes probe and jig capacitance.

B. For TTL inputs, input pulses are supplied by generators having the following characteristics: PRR

≤ 10 MHz, Zo = 50 Ω, tr ≤ 2.5 ns,

tf ≤ 2.5 ns.

C. For ECL inputs, input pulses are supplied by generators having the following characteristics: PRR

≤ 10 MHz, Zo = 50 Ω, tr ≤ 0.7 ns,

tf ≤ 0.7 ns.

D. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuit and Voltage Waveforms