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HD74HC592 Datasheet

  • HD74HC592

  • 8-bit Register/Binary Counter

  • 9頁

  • HITACHI

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HD74HC592
8-bit Register/Binary Counter
Description
The HD74HC592 consists of a parallel input, 8-bit storage register feeding an 8-bit binary counter. Both
the register and the counter have individual positive edge-triggered clocks. In addition, the counter has
direct load and clear functions. Expansion is easily accomplished by connecting
RCO
of the first stage to
the count enable of the second stage, etc.
Features
鈥?/div>
High Speed Operation: t
pd
(CCK to
RCO)
= 24 ns typ (C
L
= 50 pF)
鈥?/div>
High Output Current: Fanout of 10 LSTTL Loads
鈥?/div>
Wide Operating Voltage: V
CC
= 2 to 6 V
鈥?/div>
Low Input Current: 1 碌A max
鈥?/div>
Low Quiescent Supply Current: I
CC
(static) = 4 碌A max (Ta = 25擄C)
Function Table
Inputs
RCK
X
X
CLoad
L
H
H
H
X
X
X
H
H
H
CCLR
H
L
H
H
H
H
H
CCKEN
X
X
X
X
L
L
H
X
CCK
X
X
X
X
Function
Regiater data loaded into counter
Counter clear
Input data A to H stored into register
No change in register
Count up
No count
No cont
RCO
= QA鈥欌€B鈥欌€C鈥欌€D鈥欌€E鈥欌€F鈥欌€G鈥欌€H鈥欌€?(CCKEN) (QA鈥?to QH鈥? Output of Internal Counter)

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