Si552
2. Pin Descriptions
(Top View)
V C
FS
GND
1
2
3
6
5
4
V DD
CLK–
CLK+
Table 11. Si552 Pin Descriptions
Pin
1
Name
V C
Type
Analog Input
Control Voltage
Function
Frequency Select:
2
FS*
Input
0 = first frequency selected
1 = second frequency selected
3
4
5
6
GND
CLK+
CLK–
(N/A for CMOS)
V DD
Ground
Output
Output
Power
Electrical and Case Ground
Oscillator Output
Complementary Output
(N/C for CMOS)
Power Supply Voltage
*Note: FS includes a 17 k ? pullup resistor to V DD . See Section 3. "Ordering Information" on page 10 for details on frequency
select and OE polarity ordering options.
Rev. 1.1
9
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