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HD74HC298 Datasheet

  • HD74HC298

  • Quad. 2-input Multiplexers (with storage)

  • 45.74KB

  • 8頁(yè)

  • HITACHI

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HD74HC298
Quad. 2-input Multiplexers (with storage)
Description
This circuit is controlled by the signals word select and clock. When the word select input is taken low
word 1 (A
1
, B
1
, C
1
and D
1
) is presented to the inputs of the flip-flops, and when word select is high word 2
(A
2
, B
2
, C
2
and D
2
) is presented to the inputs of the flip-flops. The selected word is clocked to the output
terminals on the negative edge of the clock pulse.
Features
鈥?/div>
High Speed Operation: t
pd
(Clock to Q) = 19 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(chǔ) max
鈥?/div>
Low Quiescent Supply Current: I
CC
(static) = 4 碌A(chǔ) max
Function Table
Inputs
Word Select
L
H
X
H
Clock
Outputs
Q
A
a
1
a
2
Q
A0
Q
B
b
1
b
2
Q
B0
Q
C
c
1
c
2
Q
C0
Q
D
d
1
d
2
Q
D0

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