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74HC259DB 数据表(PDF) 13 Page - NXP Semiconductors

部件名 74HC259DB
功能描述  8-bit addressable latch
PDF  23 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

74HC259DB 数据表(HTML) 13 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
13 of 22
NXP Semiconductors
74HC259; 74HCT259
8-bit addressable latch
Test data is given in Table 10.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch
Fig 12. Load circuit for measuring switching times
VM
VM
tW
tW
10 %
90 %
0 V
VI
VI
negative
pulse
positive
pulse
0 V
VM
VM
90 %
10 %
tf
tr
tr
tf
001aad983
DUT
VCC
VCC
VI
VO
RT
RL
S1
CL
open
G
Table 10.
Test data
Type
Input
Load
S1 position
VI
tr, tf
CL
RL
tPHL, tPLH
74HC259
VCC
6ns
15pF, 50 pF
1k
open
74HCT259
3V
6ns
15pF, 50 pF
1k
open



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