SN75186 Datasheet, PDF (10/12 Pages) Texas Instruments – QUADRUPLE DRIVER/RECEIVER WITH LOOPBACK

SN75186
QUADRUPLE DRIVER/RECEIVER WITH LOOPBACK
SLLS068C – FEBRUARY 1990 – REVISED MAY 1995
PARAMETER MEASUREMENT INFORMATION
Input
A
Pulse
Generator
LB
(see Note A)
B = High
Y
Loopback
Input LB
50% 50%
tpd(ILB)
Receiver
Output Z
50%
50%
tpd(OLB)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω.
B. CL includes probe and jig capacitance.
Figure 7. Loopback Entry and Exit Propagation Times
Input
Pulse
Generator
A
(see Note A)
Driver
Y
Driver
Input A
50% 50%
LB = Low
B
Receiver
TEST CIRCUIT
Z
tpd(LB)
Receiver
Output Z
50%
50%
VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω.
B. CL includes probe and jig capacitance.
Figure 8. Loop Propagation Times in Loopback Mode
tpd(LB)
10
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265