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54ACT16841 Datasheet(PDF) 5 Page - Texas Instruments

Part No. 54ACT16841
Description  20-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

54ACT16841 Datasheet(HTML) 5 Page - Texas Instruments

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54ACT16841, 74ACT16841
20-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS174A – MAY 1991 – REVISED APRIL 1996
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
C d
Power dissipation capacitance
Outputs enabled
CL =50 pF
f=1MHz
41
pF
Cpd
Power dissipation capacitance
Outputs disabled
CL = 50 pF,
f = 1 MHz
10
pF
PARAMETER MEASUREMENT INFORMATION
50% VCC
1.5 V
1.5 V
1.5 V
3 V
3 V
0 V
0 V
th
tsu
VOLTAGE WAVEFORMS
Data Input
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
1.5 V
1.5 V
3 V
0 V
50% VCC
50% VCC
Input
Out-of-Phase
Output
In-Phase
Output
Timing Input
(see Note B)
50% VCC
VOLTAGE WAVEFORMS
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
500
500
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
× VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
1.5 V
1.5 V
[ VCC
0 V
50% VCC
20% VCC
50% VCC
80% VCC
[ 0 V
3 V
GND
Open
VOLTAGE WAVEFORMS
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
GND
TEST
S1
3 V
0 V
1.5 V
1.5 V
tw
VOLTAGE WAVEFORMS
Input
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
≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms


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