HD74HC4538RPEL データシートの表示（PDF） - Renesas Electronics

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HD74HC4538RPEL

Dual Precision Retriggerable/Resettable Monostable Multivibrators

Renesas Electronics 

HD74HC4538

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

Propagation delay tPLH

time

2.0 — — 235

—

4.5 — 22 47

—

295 ns A or B to Q

59

6.0 — — 40

—

50

tPHL

2.0 — — 260

—

4.5 — 23 52

—

325 ns A or B to Q

65

6.0 — — 44

—

55

tPHL

2.0 — — 235

—

4.5 — 17 47

—

295

ns CD to Q

59

6.0 — — 40

—

50

tPLH

2.0 — — 235

—

4.5 — — 47

—

295

ns CD to Q

59

6.0 — — 40

—

50

Pulse width

tw

2.0

80 — —

100

—

ns A, B, CD

4.5 16 — —

20

—

6.0 14 — —

17

—

Output pulse width tWQ

3.0 — 150 —

—

5.0 — 100 —

—

—

ns RX = 1 kΩ, CX = 12 pF

—

3.0 — — —

—

5.0 — 1.3 —

—

—

µs RX = 10 kΩ, CX = 100 pF

—

3.0 — — —

—

5.0 — 9 —

—

—

µs RX = 10 kΩ, CX = 1000 pF

—

3.0 — — —

—

5.0 — 70 —

—

—

µs RX = 10 kΩ, CX = 10000 pF

—

Pulse width match ∆tWQ

5.0

— ±0.1 —

—

between circuits in

the same package

—

% RX = 10 kΩ, CX = 1000 pF

Caution in use: In order to prevent any malfunctions due to noise, connect a high frequency performance capacitor

between VCC and GND, and keep the wiring between the External components and Cext, Rext/Cext pins

as short as possible.

Test Circuit

VCC

Input A

Pulse Generator

Zout = 50 Ω

Input B

Pulse Generator

Zout = 50 Ω

Input Clear

Pulse Generator

Zout = 50 Ω

VCC

Cext Rext

Cext Rext/Cext

Q

Output

CL =

50 pF

Output

Q

Clear

CL =

50 pF

Note : 1. CL includes probe and jig capacitance.

Rev.2.00 Mar 30, 2006 page 4 of 13

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