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CD74AC191 Datasheet(PDF) 8 Page - Texas Instruments

Part # CD74AC191
Description  Presettable Synchronous 4-Bit Binary Up/Down Counter
PDF  10 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

CD74AC191 Datasheet(HTML) 8 Page - Texas Instruments

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FIGURE 3.
FIGURE 4.
FIGURE 5.
The shaded areas indicate when the input is permitted to change for
predictable output performance.
FIGURE 6.
FIGURE 7.
FIGURE 8.
Pn
INPUT LEVEL
VS
Qn
tPHL
tPLH
VS
VS
VS
INPUT LEVEL
Pn
tW
PL
VS
tPLH
Qn
tPHL
VS
VS
VS
INPUT LEVEL
PL
CP
Qn
tW
VS
tREC
INPUT LEVEL
INPUT LEVEL
Pn
PL
Qn
tSU(H)
VS
tH(H)
tSU(L)
tH(L)
INPUT LEVEL
INPUT LEVEL
VS
VS
VS
U/D
VS
tPLH
TC
tPHL
RC
INPUT LEVEL
tPHL
tPLH
VS
VS
VS
VS
VS
CP
VS
CE
CE MAY
CHANGE
tSU(L)
(H-L)
ONLY
tH(L)
CE MAY
CHANGE
VS
VS
VS
tSU(H)
INPUT
LEVEL
INPUT
LEVEL
DUT
OUTPUT
RL (NOTE)
OUTPUT
LOAD
500
Ω
CL
50pF
NOTE: For AC Series Only: When VCC = 1.5V, RL = 1kΩ.
FIGURE 9. PROPAGATION DELAY TIMES
CD74AC
CD74ACT
Input Level
VCC
3V
Input Switching Voltage, VS
0.5 VCC
1.5V
Output Switching Voltage, VS
0.5 VCC
0.5 VCC
CD74AC191, CD74ACT191



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