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74HC259PW-Q100 数据表(PDF) 4 Page - NXP Semiconductors

部件名 74HC259PW-Q100
功能描述  8-bit addressable latch
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

74HC259PW-Q100 数据表(HTML) 4 Page - NXP Semiconductors

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74HC_HCT259_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 30 July 2012
4 of 20
NXP Semiconductors
74HC259-Q100; 74HCT259-Q100
8-bit addressable latch
5.2 Pin description
6.
Functional description
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
d = HIGH or LOW data one set-up time prior to the LOW-to-HIGH LE transition;
q = lower case letter indicates the state of the referenced input one set-up time prior to the LOW-to-HIGH transition.
Table 2.
Pin description
Symbol
Pin
Description
A0, A1, A2
1, 2, 3
address input
Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7
4, 5, 6, 7, 9, 10, 11, 12 latch output
GND
8
ground (0 V)
D
13
data input
LE
14
latch enable input (active LOW)
MR
15
conditional reset input (active LOW)
VCC
16
supply voltage
Table 3.
Function table[1]
Operating mode
Input
Output
MR
LE
D
A0
A1
A2
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Reset (clear)
L
H
X
X
X
X
LLLLLLLL
Demultiplexer
(active HIGH 8-channel)
decoder (when D = H)
L
L
d
L
L
L
Q = d LLLLLLL
L
L
d
H
L
L
LQ = d LLLLLL
L
L
d
L
H
L
LLQ = d LLLLL
L
L
d
H
H
L
LLLQ = d LLLL
L
L
d
L
L
H
LLLLQ = d LLL
L
L
d
H
L
H
LLLLLQ = d LL
L
L
d
L
H
H
LLLLLLQ = d L
L
L
d
H
H
H
LLLLLLLQ = d
Memory (no action)
H
H
X
X
X
X
q0
q1
q2
q3
q4
q5
q6
q7
Addressable latch
H
L
d
L
L
L
Q = d q1
q2
q3
q4
q5
q6
q7
HL
d
HL
L
q0
Q=d q2
q3
q4
q5
q6
q7
HL
d
L
HL
q0
q1
Q=d q3
q4
q5
q6
q7
HL
d
HHL
q0
q1
q2
Q=d q4
q5
q6
q7
H
Ld
LLH
q0
q1
q2
q3
Q=d q5
q6
q7
HL
d
HL
H
q0
q1
q2
q3
q4
Q=d q6
q7
HL
d
L
HH
q0
q1
q2
q3
q4
q5
Q=d q7
HL
d
HHH
q0
q1
q2
q3
q4
q5
q6
Q=d


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