74AHC245BQ(2009) Ver la hoja de datos (PDF) - NXP Semiconductors.
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74AHC245BQ Datasheet PDF : 16 Pages
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Nexperia
74AHC245; 74AHCT245
Octal bus transceiver; 3-state
VI 90 %
tW
negative
pulse
VM
10 %
0V
tf
VI
positive
pulse
tr
90 %
VM
10 %
0V
tW
VM
tr
tf
VM
VI
G
VCC
VO
DUT
RT
VCC
RL S1
CL
open
001aad983
Fig 7.
Test data is given in Table 9.
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.
Load circuitry for measuring switching times
Table 9. Test data
Type
Input
74AHC245
74AHCT245
VI
VCC
3.0 V
tr, tf
≤ 3.0 ns
≤ 3.0 ns
Load
CL
15 pF, 50 pF
15 pF, 50 pF
RL
1 kΩ
1 kΩ
S1 position
tPHL, tPLH
open
open
tPZH, tPHZ
GND
GND
tPZL, tPLZ
VCC
VCC
74AHC_AHCT245_5
Product data sheet
Rev. 05 — 28 April 2009
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