74HC191 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
Product data sheet Rev. 3 — 3 January 2017 15 of 22
NXP Semiconductors
74HC191
Presettable synchronous 4-bit binary up/down counter
Test data is given in Table 10.
Test circuit definitions:
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator
C
L
= Load capacitance including jig and probe capacitance
R
L
= Load resistance.
S1 = Test selection switch
Fig 18. Test circuit for measuring switching times
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0
9
0
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&&
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&&
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,
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2
5
7
5
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&
/
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*
Table 10. Test data
Input Load S1 position
V
I
t
r
, t
f
C
L
R
L
t
PHL
, t
PLH
V
CC
6 ns 15 pF, 50 pF 1 k open
74HC191 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
Product data sheet Rev. 3 — 3 January 2017 16 of 22
NXP Semiconductors
74HC191
Presettable synchronous 4-bit binary up/down counter
12. Package outline
Fig 19. Package outline SOT109-1 (SO16)
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74HC191 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
Product data sheet Rev. 3 — 3 January 2017 17 of 22
NXP Semiconductors
74HC191
Presettable synchronous 4-bit binary up/down counter
Fig 20. Package outline SOT338-1 (SSOP16)
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74HC191PW,118

Mfr. #:
Manufacturer:
Nexperia
Description:
Counter ICs SYNC BIN U/D COUNTER
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union