74LVC161

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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) L

X

XXX

XL

L

Parallel load

H



XXl

l

L

L

H



XXl

h

H

*

Count

H



hhh

X

count

*

Hold

(do nothing)

HX

l

X

h

X

qn

*

HX

X

l

h

X

qn

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

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 =0V 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