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