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74LVT245 数据表(PDF) 8 Page - NXP Semiconductors

部件名 74LVT245
功能描述  3.3 V octal transceiver with direction pin (3-state)
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

74LVT245 数据表(HTML) 8 Page - NXP Semiconductors

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74LVT245_3
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 03 — 8 May 2008
8 of 15
NXP Semiconductors
74LVT245
3.3 V octal transceiver with direction pin (3-state)
Table 8.
Measurement points
VCC
Input
Output
VI
VM
VM
VX
VY
2.7 V to 3.6 V
GND to 2.7 V
1.5 V
1.5 V
VOL + 0.3 V
VOH − 0.3 V
Test data is given in Table 9.
Definitions 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 7.
Test circuit for switching times
VEXT
VCC
VI
VO
001aae235
DUT
CL
RT
RL
RL
PULSE
GENERATOR
VM
VM
tW
tW
10 %
90 %
0 V
VI
VI
negative
pulse
positive
pulse
0 V
VM
VM
90 %
10 %
tf
tr
tr
tf
Table 9.
Test data
Input
Load
VEXT
VI
fi
tW
tr, tf
RL
CL
tPHZ, tPZH
tPLZ, tPZL
tPLH, tPHL
2.7 V
≤ 10 MHz
500 ns
≤ 2.5 ns
500
50 pF
GND
6 V
open


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