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3.3-V ABT 16-BIT TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS144P – MAY 1992 – REVISED NOVEMBER 2006
PARAMETER MEASUREMENT INFORMATION
500
Ω
S1
6V
Open
GND
500
Ω
TEST
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
S1
Open
6V
GND
From Output
Under Test
C
L
= 50 pF
(see Note A)
2.7 V
LOAD CIRCUIT
Timing Input
1.5 V
0V
t
w
2.7 V
Input
1.5 V
1.5 V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
2.7 V
Input
t
PLH
Output
t
PHL
1.5 V
1.5 V
1.5 V
1.5 V
0V
t
PHL
V
OH
1.5 V
V
OL
t
PLH
V
OH
Output
1.5 V
V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
2.7 V
1.5 V
t
PZL
1.5 V
t
PZH
1.5 V
1.5 V
0V
t
PLZ
3V
V
OL
+ 0.3 V
t
PHZ
V
OH
− 0.3 V
V
OH
≈0
V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
V
OL
Data Input
t
su
1.5 V
t
h
2.7 V
1.5 V
0V
Output
Control
Output
Waveform 1
S1 at 6 V
(see Note B)
NOTES: A. C
L
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, Z
O
= 50
Ω,
t
r
≤
2.5 ns, t
f
≤
2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
7
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