HCF40193B_02 查看數據表（PDF） - STMicroelectronics

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HCF40193B_02

PRESETTABLE UP/DOWN COUNTERS (DUAL CLOCK WITH RESET) BINARY TYPE

STMicroelectronics 

HCF40193B

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

FUNCTIONAL DIAGRAM

PIN DESCRIPTION

PIN No

3, 2, 6, 7

4

5

11

12

13

14

15, 1, 10, 9

8

16

SYMBOL NAME AND FUNCTION

Q1 to Q4

CLOCK

DOWN

CLOCK UP

PRESET

ENABLE

CARRY

BORROW

RESET

J1 to J4

VSS

VDD

Flip-Flop Outputs

Clock Down Input

Clock Up Input

Preset Enable Input

Count Up (Carry)

Count Down (Borrow)

Reset Input

Data Input

Negative Supply Voltage

Positive Supply Voltage

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