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LM293

Low power dual voltage comparator

Philips Electronics 

Philips Semiconductors

Low power dual voltage comparator

Product specification

LM193/A/293/A/393/A/2903

EQUIVALENT CIRCUIT

+ VC

FREQUENCY

CONTROL

VOLTAGE

INPUT

NOTES:

V+ = 30VDC

+ 250m VDC < VC = 50VDC

700H < fO = 100kHz

100kΩ

0.1µF

– 500pF

10 LM393

+

20kΩ

50kΩ

20kΩ

+

LM393

–

V+

30kΩ

5.1kΩ

V – /2

700kΩ

–

LM393

+

V + /2

3.0kΩ

OUTPUT 1

OUTPUT 2

Two–Decade High–Frequency VCO

+ V (12VDC)

+ 5VDC

+ VREF HI

+ VIN

2RS

RS

10KΩ

+

–

+

2RS –

LAMP

2N2222

360

+ VREF 4

100

+

–

100k

+ 5VDC

360

+

+ VREF 3 –

100k

VO

100

+ 5VDC

360

Limit Comparator

V+

+

–

TTL–to–MOS Logic Converter

+

+ VREF 2 –

100k

100

+ 5VDC

360

+

+ VREF 1 –

100k

100

V+

200kΩ 100kΩ

+

0.1µF

–

2.0kΩ

V+

VO

0

200kΩ

CRYSTAL

I – 100kHz

Visible Voltage Indicator

Crystal–Controlled Oscillator

NOTE:

Input of unused comparators should be grounded.

Figure 3. Equivalent Circuit

SL00081

1995 Nov 27

5

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