SN54ABT543A, SN74ABT543A
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS157F – JANUARY 1991 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
7V
From Output
Under Test
CL = 50 pF
(see Note A)
500
Ω
S1
Open
GND
500
Ω
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
7V
Open
LOAD CIRCUIT
Timing Input
tw
3V
Input
1.5 V
1.5 V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
3V
Input
tPLH
Output
1.5 V
1.5 V
1.5 V
0V
tPHL
VOH
1.5 V
VOL
tPHL
Output
1.5 V
tPLH
VOH
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Waveform 2
S1 at Open
(see Note B)
Output
Waveform 1
S1 at 7 V
(see Note B)
tPZH
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Data Input
tsu
1.5 V
th
1.5 V
3V
0V
3V
1.5 V
0V
Output
Control
tPZL
3V
1.5 V
1.5 V
0V
tPLZ
1.5 V
tPHZ
VOH – 0.3 V
VOH
≈
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
3.5 V
VOL + 0.3 V
VOL
1.5 V
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤
10 MHz, ZO = 50
Ω,
tr
≤
2.5 ns, tf
≤
2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
