Philips Semiconductors
Product specification
Quad voltage comparator
LM139/239/239A/339/339A/
LM2901/MC3302
EQUIVALENT CIRCUIT
V
+
700kΩ
100kΩ
V
+
+ VC
FREQUENCY
CONTROL
VOLTAGE
INPUT
50kΩ
–
10
0.1µF
20kΩ
20kΩ
500pF
30kΩ
5.1kΩ
3.0kΩ
1/4LM339
–
0.01µF
V
–
/2
1/4LM339
OUTPUT 1
+
+
OUTPUT 2
+
1/4LM339
V
+
/2
–
NOTES:
V+ = 30V
DC
+ 250m V
DC
< V
C
= 50V
DC
700H < f
O
= 100kHz
Two–Decade High–Frequency VCO
+
V (12V
DC
)
+
V
2R
S
REF
HI
R
S
10KΩ
+
–
LAMP
+
V
+
5V
IN
+
DC
360
+
V
2R
S
2N2222
–
REF
LO
Limit Comparator
+
+
V
REF 4
100
–
100k
+
5V
360
+
V
REF
DC
5V
DC
o
+
–
10KΩ
–12V
DC
1/4LM339
V
O
–12V
+
+
V
V
O
REF 3
–
100
100k
+
5V
360
DC
(1.4V
DC
)
TTL–to–MOS Logic Converter
+
V
+
REF 2
–
100k
+
5V
360
DC
200kΩ
100kΩ
+
–
V
O
2.0kΩ
V
+
0.1µF
o
V
+
100
+
V
+
REF 1
–
100
100k
Visible Voltage Indicator
200kΩ
CRYSTAL
1 – 100kHz
Crystal–Controlled Oscillator
NOTE:
Input of unused comparators should be grounded.
SL00072
Figure 3. Equivalent Circuit
1995 Nov 27
7