Datasheet

SN74ALVCH162827
20-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES013E – JULY 1995 – REVISED FEBRUARY 1999
4–164
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
operating characteristics, T
A
= 25°C
V
CC
= 1.8 V V
CC
= 2.5 V V
CC
= 3.3 V
PARAMETER TEST CONDITIONS
TYP TYP TYP
UNIT
Power dissipation
Outputs enabled
†
16 18
C
pd
capacitance
Outputs disabled
C
L
= 50 pF, f = 10 MHz
†
4 6
pF
†
This information was not available at the time of publication.
PARAMETER MEASUREMENT INFORMATION
V
CC
= 1.8 V
V
CC
/2
V
CC
/2
V
CC
/2V
CC
/2
V
CC
/2V
CC
/2
V
CC
/2
V
CC
/2
V
OH
V
OL
t
h
t
su
From Output
Under Test
C
L
= 30 pF
(see Note A)
LOAD CIRCUIT
S1
Open
GND
1 kΩ
1 kΩ
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2 × V
CC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
t
PZL
t
PZH
t
PLZ
t
PHZ
0 V
V
OL
+ 0.15 V
V
OH
– 0.15 V
0 V
V
CC
0 V
0 V
t
w
V
CC
V
CC
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
Timing
Input
Data
Input
Input
t
pd
t
PLZ
/t
PZL
t
PHZ
/t
PZH
Open
2 × V
CC
GND
TEST S1
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 ns, t
f
≤ 2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as t
en
.
G. t
PLH
and t
PHL
are the same as t
pd
.
0 V
V
CC
V
CC
/2
t
PHL
V
CC
/2 V
CC
/2
V
CC
0 V
V
OH
V
OL
Input
Output
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
V
CC
/2 V
CC
/2
t
PLH
2 × V
CC
V
CC
Figure 1. Load Circuit and Voltage Waveforms