HCF4098B Просмотр технического описания (PDF) - STMicroelectronics

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HCF4098B

DUAL MONOSTABLE MULTIVIBRATOR

STMicroelectronics 

HCF4098B

An unused RESET input should be tied to VDD .

However, if an entire section of the HCF4098B is

not used, its reset should be tied to VSS (see table

1). In normal operation the circuit triggers (extends

the output pulse one period) on the application of

each new trigger pulse. For operation in the

non-retiggerable mode, Q is connected to -TR

when leading edge triggering (+TR) is used or Q is

connected to +TR when trailing edge triggering

(-TR) is used. The time period (T) for this

IINPUT EQUIVALENT CIRCUIT

FUNCTIONAL DIAGRAM

multivibrator can be calculated by : T = 1/2 RX CX

for CX > 0.01µF. The min. value of external

resistance, RX, is 5KΩ. The max. values of

external capacitance, CX, is 100 µF. The output

pulse width has variations of ±2.5% typically, over

the temperature range of -55 °C to 125 °C for

CX=1000pF and RX = 100KΩ . For power supply

variation of ±5% typically , for VDD = 10V and 15V

and ±1% typically for VDD = 5V at CX = 1000pF

and RX = 5KΩ .

PIN DESCRIPTION

PIN No

4, 12

5, 11

3, 13

1, 15

2, 14

6, 7

10, 9

8

16

SYMBOL

+TR

-TR

RESET

CX1, CX2

RXCX1

RXCX2

Q1, Q1

Q2, Q2

VSS

VDD

NAME AND FUNCTION

Leading Trigger Inputs

Trailing Trigger Inputs

Reset Inputs

External Capacitors

External resistors to Vdd

Ouputs Mono 1

Outputs Mono 2

Negative Supply Voltage

Positive Supply Voltage

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