74LVC161 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 30 September 2013 12 of 22
NXP Semiconductors
74LVC161
Presettable synchronous 4-bit binary counter; asynchronous reset
11. Waveforms
Measurement points are given in Table 8.
V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig 9. Clock (CP) to outputs (Qn, TC) propagation delays, the clock pulse width, and maximum frequency
mna911
CP
input
Qn, TC
output
t
PHL
t
PLH
t
W
1/f
max
V
M
V
OH
V
I
GND
V
OL
V
M
Measurement points are given in Table 8.
V
OL
and V
OH
are typical output voltage levels that occur with the output load.
Fig 10. Input (CET) to output (TC) propagation delays
mna912
t
PHL
t
PLH
V
M
V
M
TC output
CET input
GND
V
I
V
OH
V
OL
Fig 11. Master reset (MR) pulse width, the master reset to output (Qn, TC) propagation delays, and the master
reset to clock (CP) removal times
mna913
MR
input
CP
input
Qn, TC output
t
PHL
t
W
t
rec
V
M
V
OH
V
I
V
I
GND
GND
V
OL
V
M
V
M
74LVC161 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 30 September 2013 13 of 22
NXP Semiconductors
74LVC161
Presettable synchronous 4-bit binary counter; asynchronous reset
The shaded areas indicate when the input is permitted to change for predictable output performance.
Fig 12. Set-up and hold times for the input (Dn) and parallel enable input (PE)
mna914
GND
GND
GND
t
h
t
h
t
su
t
su
t
su
t
h
t
h
t
su
V
M
V
M
V
M
V
I
V
I
CP input
PE input
Dn input
V
I
The shaded areas indicate when the input is permitted to change for predictable output performance.
Fig 13. CEP and CET set-up and hold times
mna915
t
h
t
su
t
h
t
su
GND
V
I
V
M
V
M
GND
V
I
CP input
CEP, CET input
Table 8. Measurement points
Supply voltage Input Output
V
CC
V
I
V
M
V
M
1.2 V V
CC
0.5 V
CC
0.5 V
CC
1.65 V to 1.95 V V
CC
0.5 V
CC
0.5 V
CC
2.3 V to 2.7 V V
CC
0.5 V
CC
0.5 V
CC
2.7 V 2.7 V 1.5 V 1.5 V
3.0 V to 3.6 V 2.7 V 1.5 V 1.5 V
74LVC161 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 30 September 2013 14 of 22
NXP Semiconductors
74LVC161
Presettable synchronous 4-bit binary counter; asynchronous reset
Test data is given in Table 9. Definitions for test circuit:
R
L
= Load resistance.
C
L
= Load capacitance including jig and probe capacitance.
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator.
Fig 14. Test circuit for measuring switching times
V
M
V
M
t
W
t
W
10 %
90 %
0 V
V
I
V
I
negative
pulse
positive
pulse
0 V
V
M
V
M
90 %
10 %
t
f
t
r
t
r
t
f
001aaf615
V
CC
V
I
V
O
DUT
C
L
R
T
R
L
PULSE
GENERATOR
Table 9. Test data
Supply voltage Input Load
V
I
t
r
, t
f
C
L
R
L
1.2 V V
CC
2 ns 30 pF 1 k
1.65 V to 1.95 V V
CC
2 ns 30 pF 1 k
2.3 V to 2.7 V V
CC
2 ns 30 pF 500
2.7V 2.7V 2.5 ns 50 pF 500
3.0Vto3.6V 2.7V 2.5 ns 50 pF 500

74LVC161D,118

Mfr. #:
Manufacturer:
Nexperia
Description:
Counter ICs 3.3V SYNC 4-BIT BIN
Lifecycle:
New from this manufacturer.
Delivery:
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