HCF40193B

2/12

one-half clock cycle after the counter reaches its

minimum count in the count-down mode. The

cascading

of

multiple

packages

is

easily

accomplished without the need for additional

external circuitry by tying the BORROW and

CARRY outputs to the CLOCK DOWN and

CLOCK UP inputs, respectively, of the following

package.

IINPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

FUNCTIONAL DIAGRAM

PIN No

SYMBOL

NAME AND FUNCTION

3, 2, 6, 7

Q1 to Q4

Flip-Flop Outputs

4

CLOCK

DOWN

Clock Down Input

5

CLOCK UP

Clock Up Input

11

PRESET

ENABLE

Preset Enable Input

12

CARRY

Count Up (Carry)

13

BORROW

Count Down (Borrow)

14

RESET

Reset Input

15, 1, 10, 9

J1 to J4

Data Input

8

Negative Supply Voltage

16

Positive Supply Voltage