HD74LS193P datasheet(6/12 Pages) RENESAS

6 / 12 page

HD74LS193

Rev.2.00, Feb.18.2005, page 6 of 11

Testing Method

Test Circuit

4.5V

Borrow

Load circuit 1

Output

VCC

Input

P.G.

Zout = 50

Ω

Clear

Down

Load

Carry

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Notes:

CL includes probe and jig capacitance.

All diodes are 1S2074(H).

Testing Table

Inputs

Item

From input to output

CLR

Load

Down

Up Count

GND

4.5V

GND

ƒmax

Down Count

GND

4.5V

GND

Up Count

GND

4.5V

GND

Down Count

GND

4.5V

GND

Load

→Q

GND

tPLH

tPHL

Clear

→Q

IN*

GND

4.5V

Note:

*. For initialized

Outputs

Item

From input to output

Carry

Borrow

Up Count

OUT

—

ƒmax

Down Count

OUT

—

OUT

Up Count

OUT

—

Down Count

OUT

—

OUT

Load

→Q

OUT

—

tPLH

tPHL

Clear

→Q

OUT

—

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