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SN54ALS161B Datasheet(PDF) 11 Page - Texas Instruments

Part No. SN54ALS161B
Description  SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54ALS161B Datasheet(HTML) 11 Page - Texas Instruments

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SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163
SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163
SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS
SDAS276A – DECEMBER 1994 – REVISED JULY 2000
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/ 74ALS AND 54AS/ 74AS DEVICES
tPLZ
tPHL
tPLH
0.3 V
tPZL
tPLH
tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test
Test
Point
S1
CL = 50 pF
(see Note A)
7 V
3 V
3 V
0 V
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
3 V
3 V
0 V
0 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note C)
3 V
3 V
0 V
0 V
VOL
VOH
VOH
VOL
Output
Control
(low-level
enabling)
Waveform 1
S1 Closed
(see Note B)
Waveform 2
S1 Open
(see Note B)
≈0 V
VOH
VOL
≈3 V
In-Phase
Output
0.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
VCC
Test
Point
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT FOR
BI-STATE TOTEM-POLE OUTPUTS
From Output
Under Test
Test
Point
CL = 50 pF
(see Note A)
500
500
500
500
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
tPHZ
tPZH
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
1.5 V
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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR
≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms


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