Nexperia

74LVC161

Presettable synchronous 4-bit binary counter; asynchronous reset

6. Functional description

Table 3. Function table

* = 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

Input

Output

Operating

modes

MR

CP

CEP

CET

PE

Dn

Qn

TC

Reset (clear) L

X

X

X

X

X

L

L

H

↑

X

X

l

l

L

L

Parallel load

H

↑

X

X

l

h

H

*

Count

H

↑

h

h

h

X

count

*

H

X

l

X

h

X

qn

*

Hold

(do nothing) H

X

X

l

h

X

qn

L

7. Limiting values

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

VCC

supply voltage

-0.5

+6.5

V

IIK

input clamping current

VI < 0

-50

-

mA

VI

input voltage

[1]

-0.5

+6.5

V

IOK

output clamping current

VO > VCC or VO < 0

-

±50

mA

VO

output voltage

[2]

-0.5

VCC + 0.5

V

IO

output current

VO = 0 V to VCC

-

±50

mA

ICC

supply current

-

100

mA

IGND

ground current

-100

-

mA

Tstg

storage temperature

-65

+150

°C

Ptot

total power dissipation

Tamb = -40 °C to +125 °C

[3]

-

500

mW

[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 SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C.

For SOT403-1 (TSSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.

For SOT763-1 (DHVQFN16) package: Ptot derates linearly with 11.2 mW/K above 106 °C.

74LVC161

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 7 — 22 September 2021

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