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74HC259D Datasheet(PDF) 12 Page - NXP Semiconductors

Part No. 74HC259D
Description  8-bit addressable latch
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC259D Datasheet(HTML) 12 Page - NXP Semiconductors

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74HC_HCT259
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 7 August 2012
12 of 22
NXP Semiconductors
74HC259; 74HCT259
8-bit addressable latch
Measurement points are given in Table 9.
The shaded areas indicate when the input is permitted to change for predictable output performance.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 10. Data input to latch enable input set-up and hold times
001aah125
GND
GND
th
tsu
th
tsu
VM
VM
VM
VCC
VOH
VOL
VCC
Qn output
Q = D
Q = D
LE input
D input
Measurement points are given in Table 9.
The shaded areas indicate when the input is permitted to change for predictable output performance.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 11. Address input to latch enable input set-up and hold times
001aah126
VM
ADDRESS STABLE
VM
th
tsu
VCC
GND
VCC
GND
LE input
An input
Table 9.
Measurement points
Type
Input
Output
VM
VM
VX
VY
74HC259
0.5VCC
0.5VCC
0.1VCC
0.9VCC
74HCT259
1.3 V
1.3 V
0.1VCC
0.9VCC


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