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SN74AHC157PWLE Datasheet(PDF) 6 Page - Texas Instruments

Part # SN74AHC157PWLE
Description  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SN74AHC157PWLE Datasheet(HTML) 6 Page - Texas Instruments

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background image
50% VCC
VCC
VCC
0 V
0 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Data Input
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
VCC
0 V
50% VCC
50% VCC
Input
Out-of-Phase
Output
In-Phase
Output
Timing Input
50% VCC
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Control
Output
Waveform 1
S1 at VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
≈VCC
0 V
50% VCC
VOL + 0.3 V
50% VCC
≈0 V
VCC
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
Open
VCC
GND
VCC
TEST
S1
VCC
0 V
50% VCC
tw
VOLTAGE WAVEFORMS
PULSE DURATION
Input
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
S1
VCC
RL = 1 kΩ
GND
From Output
Under Test
CL
(see Note A)
Test
Point
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
Open
50% VCC
50% VCC
50% VCC
50% VCC
50% VCC
50% VCC
50% VCC
50% VCC
VOH – 0.3 V
SN54AHC157
SN74AHC157
SCLS345J – MAY 1996 – REVISED JUNE 2013
www.ti.com
PARAMETER MEASUREMENT INFORMATION
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.
E.
All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
6
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Copyright © 1996–2013, Texas Instruments Incorporated
Product Folder Links: SN54AHC157 SN74AHC157


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