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74LVCH244A 데이터시트(PDF) 10 Page - NXP Semiconductors

부품명 74LVCH244A
상세설명  Octal buffer/line driver; 3-state
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

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74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 8 — 26 June 2013
10 of 19
NXP Semiconductors
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
Test data is given in Table 9.
Definitions for test circuit:
RL = Load resistance.
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
VEXT = External voltage for measuring switching times.
Fig 8.
Test 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
001aae331
VEXT
VCC
VI
VO
DUT
CL
RT
RL
RL
G
Table 9.
Test data
Supply voltage
Input
Load
VEXT
VI
tr, tf
CL
RL
tPLH, tPHL
tPLZ, tPZL
tPHZ, tPZH
1.2 V
VCC
 2ns
30pF
1 k
open
2
 V
CC
GND
1.65 V to 1.95 V
VCC
 2ns
30pF
1 k
open
2
 V
CC
GND
2.3 V to 2.7 V
VCC
 2ns
30pF
500
open
2
 V
CC
GND
2.7V
2.7V
 2.5 ns
50 pF
500
open
2
 V
CC
GND
3.0Vto 3.6V
2.7V
 2.5 ns
50 pF
500
open
2
 V
CC
GND


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