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| 74HC193_13 Datasheet, PDF (21/30 Pages) NXP Semiconductors – Presettable synchronous 4-bit binary up/down counter | |||
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NXP Semiconductors
Table 10. Measurement points
Type
Input
74HC193
74HCT193
VM
0.5 ï´ VCC
1.3 V
74HC193; 74HCT193
Presettable synchronous 4-bit binary up/down counter
VI
GND to VCC
GND to 3 V
Output
VM
0.5 ï´ VCC
1.3 V
tW
VI 90 %
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 11.
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 resistor
S1 = Test selection switch
Fig 16. Load circuitry for measuring switching times
Table 11. Test data
Type
Input
VI
tr, tf
74HC193
VCC
6 ns
74HCT193
3V
6 ns
Load
CL
15 pF, 50 pF
15 pF, 50 pF
RL
1 kï
1 kï
S1 position
tPHL, tPLH
open
open
74HC_HCT193
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 â 24 June 2013
© NXP B.V. 2013. All rights reserved.
21 of 30
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