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CD74HC192PWTE4 数据表(PDF) 9 Page - Texas Instruments

部件名 CD74HC192PWTE4
功能描述  High-Speed CMOS Logic Presettable Synchronous 4-Bit Up/Down Counters
Download  18 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CD74HC192PWTE4 数据表(HTML) 9 Page - Texas Instruments

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FIGURE 2. ’HC193 SYNCHRONOUS BINARY COUNTERS, TYPICAL RESET, PRESET AND COUNT SEQUENCES
FIGURE 3. CLOCK TO OUTPUT DELAYS AND CLOCK PULSE
WIDTH
FIGURE 4. CLOCK TO TERMINAL COUNT DELAYS
FIGURE 5. PARALLEL LOAD PULSE WIDTH, PARALLEL
LOAD TO OUTPUT DELAYS, AND PARALLEL
LOAD TO CLOCK RECOVERY TIME
FIGURE 6. MASTER RESET PULSE WIDTH, MASTER RESET
TO OUTPUT DELAY AND MASTER RESET TO
CLOCK RECOVERY TIME
Test Circuits and Waveforms (Continued)
MASTER RESET
ASYNCHRONOUS PARALLEL LOAD
PRESET DATA
P0
P1
P2
P3
CLOCK UP
CLOCK DOWN
OUTPUTS
Q0
Q1
Q2
Q3
TERMINAL COUNT UP
TERMINAL COUNT DOWN
013
14
15
0
1
2
COUNT DOWN
COUNT UP
RESET
1
0
15
14
13
PRESET
SEQUENCES:
1. RESET OUTPUTS TO ZERO.
2. LOAD (PRESET) TO BINARY THIRTEEN.
3. COUNT UP TO FOURTEEN,
FIFTEEN, TERMINAL COUNT UP,
ZERO, ONE AND TWO.
4. COUNT DOWN TO ONE, ZERO,
TERMINAL COUNT DOWN,
FIFTEEN, FOURTEEN AND
THIRTEEN.
NOTES:
1. Master reset overrides load data and clock inputs.
2. When counting up, clock-down input must be high.
When counting down, clock-up input must be high.
CPU OR CPD
l/fMAX
INPUT LEVEL
VS
VS
VS
tPHL
tPLH
VS
Qn
VS
tW
INPUT LEVEL
TCU OR TCD
tPHL
tPLH
VS
VS
CPU OR CPD
VS
VS
INPUT LEVEL
INPUT LEVEL
INPUT LEVEL
CPU OR CPD
VS
VS
tPLH
Qn
VS
tW
VS
VS
VS
tW
Pn
PL
tPHL
tREC
VS
MR
CPU OR CPD
Qn
tPHL
VS
VS
INPUT LEVEL
tREC
INPUT LEVEL
VS
VS
tW
CD54/74HC192, CD54/74HC193, CD54/74HCT193


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