HCF4029B

2/12

signal is normally high and the counter reaches its

maximum count in the UP mode or the minimum

count in the DOWN mode provided the CARRY-IN

signal is low. The CARRY-IN signal in the low

state can thus be considered a CLOCK ENABLE.

The CARRY-IN terminal must be connected to

accomplished when the BINARY/DECODE input

is high; the counter counts in the decade mode

when the BINARY/DECADE input is low. The

counter counts Up when to UP/DOWN INPUT is

high, and Down when the UP/DOWN INPUT is

low. Multiple packages can be connected in either

a

parallel

clocking

or

a

ripple

clocking

arrangement.

Parallel

clocking

provides

synchronous

control

and,

hence,

a

faster

response

from

all

counting

outputs.

Ripple

clocking allows for longer clock input rise and fall

times.

IINPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

FUNCTIONAL DIAGRAM

PIN No

SYMBOL

NAME AND FUNCTION

15

CLOCK

Clock Input

5

CARRY IN

Carry In Input

9

BINARY/

DECADE

Binary / Decade Select

10

UP/DOWN

Up/Down Select

1

PRESET

ENABLE

Preset Enable Input

4, 12, 13, 3

JAM1 to JAM4 Jam Input Signals

6, 11, 14, 2

Q1 to Q4

Q Outputs

7

CARRY OUT

Carry Out Outputs

8

Negative Supply Voltage

16

Positive Supply Voltage