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SN74HC4020PWRE4 数据表(PDF) 5 Page - Texas Instruments

部件名 SN74HC4020PWRE4
功能描述  14-BIT ASYNCHRONOUS BINARY COUNTERS
Download  16 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74HC4020PWRE4 数据表(HTML) 5 Page - Texas Instruments

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SN54HC4020, SN74HC4020
14BIT ASYNCHRONOUS BINARY COUNTERS
SCLS158E − DECEMBER 1982 − REVISED SEPTEMBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORMS
SETUP AND INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
tsu
50%
50%
50%
10%
10%
90%
90%
VCC
VCC
0 V
0 V
tr
tf
Reference
Input
Data
Input
50%
High-Level
Pulse
50%
VCC
0 V
50%
50%
VCC
0 V
tw
Low-Level
Pulse
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
50%
50%
10%
10%
90%
90%
VCC
VOH
VOL
0 V
tr
tf
Input
In-Phase
Output
50%
tPLH
tPHL
50%
50%
10%
10%
90%
90%
VOH
VOL
tr
tf
tPHL
tPLH
Out-of-Phase
Output
Test
Point
From Output
Under Test
LOAD CIRCUIT
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. For clock inputs, fmax is measured when the input duty cycle is 50%.
D. The outputs are measured one at a time with one input transition per measurement.
E. tPLH and tPHL are the same as tpd.
CL = 50 pF
(see Note A)
Figure 1. Load Circuit and Voltage Waveforms


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