SM532 Datasheet, PDF (3/14 Pages) List of Unclassifed Manufacturers – Low EMI Spectrum Spread Clock

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YJGP VKOKPI KU ETKVKECN
Approved Product
SM532
Low EMI Sprectum Spread Clock
OSCin
OSCout
AVDD
S0
LF
AVSS
S1
SSON
1
16
2
15
3
14
4 _SM532 13
5
12
6
11
7
10
8
9
DVDD
DVSS
R0
R1
Fout
S2
DVDD
S3
Figure 2. SOIC Package Pin Assignment
Pin No.
1,2
3
4, 7
5
6
8
9, 11
10, 16
12
13, 14
15
Pin Name
OSCin,
OSCout
AVDD
S0, S1
LF
AVSS
SSON
S3, S2
DVDD
Fout
R1, R0
DVSS
I/O
I/O
Power
I
O
Ground
I
I
Power
O
I
Ground
TYPE
CMOS
TTL
Analog
Ground
TTL
TTL
Power
TTL
TTL
Ground
Pin Descriptions
Description
Pins form an on-chip reference oscillator when connected to terminals
of an external parallel resonant crystal. OSCin may be connected to a
TTL/CMOS external clock source. AC coupling may be required. If
OSCin is connected to an external clock other than a crystal, leave
OSCout (pin 2) unconnected. The input frequency range is 14 to 120
Mhz @ 5.0 VDC.
Analog circuit positive power supply.
Input control used to select the frequency multiplication at Fout,
relative to the reference clock. See table on page 5.
S0 has internal pull-down resistor, S1 has internal pull-up resistor.
Single ended tri-state output of the phase detector. A two pole
passive loop filter is connected to LF. See table on page 7 for proper
values.
Analog circuit ground.
Input control pin used to enable modulation at the Fout pin.
SSON = 0 = Modulation ON. (default)
SSON = 1 = Modulation OFF.
Has internal pull-down resistor.
Input control pins used to set the amount of modulation at Fout. See
table on page 6 for settings. S2 has internal pull-up resistor, S3 has
internal pull-down resistor.
Digital positive power supply. Should be kept separate from analog
power for best performance.
Modulated clock output.
Input pins control the input frequency range as described in table on
page 5.
R0 and R1 have internal pull-up resistor.
Digital Circuit Ground
Table 1.
International Microcircuits,Inc.
525 Los Coches St., Milpitas, 95035 408-263-6300, FAX [phone]
http:/www.imicorp.com
8/31/98
Rev. 1.4
Page 3 of 14