TC9402 TELCOM [TelCom Semiconductor, Inc], TC9402 Datasheet - Page 4

• Manufacturer Part Number: TC9402
• Description: VOLTAGE-TO-FREQUENCY/FREQUENCY-TO-VOLTAGE CONVERTERS
• Manufacturer: TELCOM [TelCom Semiconductor, Inc]

TC9400
TC9401
TC9402
PIN CONFIGURATIONS
PIN DESCRIPTIONS
3-290
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ZERO ADJ
V REF OUT
I BIAS
V REF
GND
V SS
Threshold Detect
Output Common
I IN
Pulse Freq Out
14-Pin Plastic DIP/CerDIP
Amplifier Out
Freq/2 Out
V
Zero Adj
1
2
3
4
5
6
7
Symbol
REF
GND
V
I
V
V
BIAS
NC
I
REF
IN
SS
DD
OUT
TC9400
TC9401
TC9402
14
13
12
11
10
9
8
V DD
NC
AMPLIFIER OUT
THRESHOLD DETECTOR
FREQ/2 OUT
OUTPUT COMMON
PULSE FREQ OUT
Description
This pin sets bias current in the TC9400. Connect to V
See text.
Low frequency adjustment input. See text.
Input current connection for the V/F converter.
Negative power supply voltage connection, typically – 5V.
Reference capacitor connection.
Analog ground.
Voltage reference input, typically – 5V.
Frequency output. This open drain output will pulse LOW each time the Freq
threshold detector limit is reached. The pulse rate is proportional to input voltage.
Source connection for the open drain output FETs. See text.
This open drain output is a square wave at one half the frequency of the pulse
output (pin 8). Output transitions of this pin occur on the rising edge of pin 8.
Input to the threshold detector. This pin is the frequency input during F/V operation.
Output of the integrator amplifier.
No internal connection
Positive power supply connection, typically +5V.
FREQUENCY-TO-VOLTAGE CONVERTERS
ZERO ADJ
V
REF
I BIAS
V
GND
NC = NO INTERNAL CONNECTION
OUT
V
REF
SS
I
IN
14-Pin SOIC (Narrow)
1
2
3
4
5
6
7
VOLTAGE-TO-FREQUENCY/
TC9400
TC9401
TC9402
TELCOM SEMICONDUCTOR, INC.
14
13
12
11
10
8
9
SS
V DD
NC
AMPLIFIER OUT
THRESHOLD DETECTOR
FREQ/2 OUT
OUTPUT COMMON
PULSE FREQ OUT
through a 100 k resistor.