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 7 of 22
NXP Semiconductors
74LVC161
Presettable synchronous 4-bit binary counter; asynchronous reset
6. Functional description
[1] * = the TC output is HIGH when CET is HIGH and the counter is at terminal count (HHHH)
H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
q = lower case letters indicate the state of the referenced output one set-up time prior to the LOW-to-HIGH clock transition
X = don’t care
= LOW-to-HIGH clock transition
7. Limiting values
[1] The minimum input voltage ratings may be exceeded if the input current ratings are observed.
[2] The output voltage ratings may be exceeded if the output current ratings are observed.
[3] For SO16 packages: above 70 C the value of P
D
derates linearly with 8 mW/K.
For (T)SSOP16 packages: above 60 C the value of P
D
derates linearly with 5.5 mW/K.
For DHVQFN16 packages: above 60 C the value of P
D
derates linearly with 4.5 mW/K.
Table 3. Function table
[1]
Operating
modes
Input Output
MR CP CEP CET PE Dn Qn TC
Reset (clear)LXXXXXLL
Parallel load H XXl l LL
H XXl hH*
Count H hhhXcount*
Hold
(do nothing)
HX l X h X q
n
*
HX X l h X q
n
L
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage 0.5 +6.5 V
I
IK
input clamping current V
I
<0 50 - mA
V
I
input voltage
[1]
0.5 +6.5 V
I
OK
output clamping current V
O
>V
CC
or V
O
<0 - 50 mA
V
O
output voltage
[2]
0.5 V
CC
+0.5 V
I
O
output current V
O
=0V toV
CC
- 50 mA
I
CC
supply current - 100 mA
I
GND
ground current 100 - mA
T
stg
storage temperature 65 +150 C
P
tot
total power dissipation T
amb
= 40 C to +125 C
[3]
-500mW
