XR2209 Exar Corporation, XR2209 Datasheet - Page 9

• Manufacturer Part Number: XR2209
• Description: Voltage-Controlled Oscillator
• Manufacturer: Exar Corporation

Squarewave Output (Pin 7)
The squarewave output at pin 7 is an “open-collector”
stage capable of sinking up to 20mA of load current. R
serves as a pull-up load resistor for this output.
Recommended values for R
Rev. 2.02
L
range from 1k
Figure 11. Normalized Frequency Drift with Temperature
Figure 10. Frequency Drift vs. Supply Voltage
1.04
1.02
1.00
.98
.96
.94
.92
+2
+1
-1
-2
-3
0
4
2
T A = 25 C
R T = Total
2M
C = 5000pF
200k
20k
4k
to 100k .
Timing
Resistance
-50
4
8
2k
R T = 2M
Single Supply Voltage (V)
-25
Split Supply Voltage (V)
L
12
6
9
Temperature ( C)
V
C = 5000pF
0
Triangle Output (Pin 8)
The output at pin 8 is a triangle wave with a peak swing of
approximately one-half of the total supply voltage. Pin 8
has a 10
against short circuits.
S
= 6V
16
8
+25 +50 +75 +100 +125
R T = 2k
10
20
200k
output impedance and is internally protected
R T = 200k
R T = 20k
20k
24
12
2M
R = 2k
4k
14
28
XR-2209