HD74HC78 datasheet(4/7 Pages) RENESAS

номер детали	HD74HC78

подробное описание детали	Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock)

PDF	7 Pages

Scroll/Zoom	100%

производитель	RENESAS [Renesas Technology Corp]

домашняя страница	http://www.renesas.com

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4 / 7 page

HD74HC78

Rev.2.00, Oct 06, 2005 page 4 of 6

Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Ta = 25

°C

Ta = –40 to +85

°C

Item

Symbol VCC (V)

Min

Typ

Max

Min

Max

Unit

Test Conditions

2.0

—

4.5

—

Maximum clock

frequency

fmax

6.0

—

MHz

2.0

—

150

—

190

4.5

—

6.0

—

Clock to Q or

2.0

—

140

—

175

4.5

—

6.0

—

Clear to Q or

2.0

—

140

—

175

4.5

—

Propagation delay

time

tPLH, tPHL

6.0

—

Preset to Q or

2.0

—

100

—

4.5

—

Pulse width

6.0

—

Preset, Clear, Clock

2.0

100

—

125

—

4.5

—

Setup time

tsu

6.0

—

J or K to Clock

2.0

—

4.5

–1

—

Hold time

6.0

—

Clock to J or K

2.0

100

—

125

—

4.5

—

Removal time

trem

6.0

—

Preset or Clear to Clock

2.0

—

4.5

—

Output rise/fall

time

tTLH, tTHL

6.0

—

Input capacitance

Cin

—

Test Circuit

VCC

Clock

VCC

Zout = 50

Ω

Input

Clear

Zout = 50

Ω

Input

CL = 50 pF

Output

CL = 50 pF

Output

Note: C includes the probe and jig capacitance.

Pulse generator

Preset

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