HEC4538 View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

HEC4538

Dual precision monostable multivibrator

Philips Electronics 

Philips Semiconductors

Dual precision monostable multivibrator

Product specification

HEF4538B

MSI

AC CHARACTERISTICS

VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns

VDD

V

SYMBOL MIN. TYP. MAX.

Change in output O

pulse width over

temperature (Tamb)

Change in output O

pulse width over

VDD range 5 to 15 V

Pulse width variation

between circuits

in same package

External timing

resistor

5

10

∆tWO

15

∆tWO

5

10

∆tWO

15

Rt

± 0,2

%

± 0,2

%

± 0,2

%

± 1,5

%

±1

%

±1

%

±1

%

5

−

(1)

kΩ

Rt = 100 kΩ

Ct = 2 nF to 10 µF

External timing

capacitor

Ct

2000

− no limits pF

Input capacitance

(pin 2 or 14)

CIN

15

pF

Note

1. The maximum permissible resistance Rt , which holds the specified accuracy of tWO, depends on the leakage current

of the capacitor Ct and the leakage of the HEF4538B.

January 1995

6

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