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| 74HC590 Datasheet, PDF (14/21 Pages) NXP Semiconductors – 8-bit binary counter with output register; 3-state | |||
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NXP Semiconductors
74HC590
8-bit binary counter with output register; 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
Test data is given in Table 9.
Deï¬nitions 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 15. Test circuit for measuring switching times
Table 9. Test data
Supply voltage Input
VCC
VI
2.0 V to 6.0 V
VCC
tr, tf
6 ns
Load
CL
50 pF
RL
1 kâ¦
Switch position
tPHL, tPLH
open
tPZH, tPHZ
GND
tPZL, tPLZ
VCC
74HC590_2
Product data sheet
Rev. 02 â 28 April 2009
© NXP B.V. 2009. All rights reserved.
14 of 21
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