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參數(shù)資料
| 型號： | IMISM532AXB |
| 英文描述： | Miscellaneous Clock Generator |
| 中文描述： | 雜項時鐘發(fā)生器 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 133K |
| 代理商： | IMISM532AXB |
+/+
YJGP VKOKPI KU ETKVKECN
SM532
Approved Product
Low EMI Sprectum Spread Clock
International Microcircuits,Inc.
525 Los Coches St., Milpitas, 95035 408-263-6300, FAX 408-263-6571
http:/www.imicorp.com
8/31/98
Rev. 1.4
Page 3 of 14
Figure 2. SOIC Package Pin Assignment
Pin Descriptions
Pin No.
1,2
Pin Name
OSCin,
OSCout
I/O
I/O
TYPE
CMOS
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.
3
AVDD
S0, S1
Power
I
4, 7
TTL
5
LF
O
Analog
6
8
AVSS
SSON
Ground
I
Ground
TTL
9, 11
S3, S2
I
TTL
10, 16
DVDD
Power
Power
12
Fout
R1, R0
O
I
TTL
TTL
13, 14
15
DVSS
Ground
Ground
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
OSCin
OSCout
AVDD
S0
LF
AVSS
S1
SSON
DVDD
DVSS
R0
R1
Fout
S2
S3
DVDD
SM532
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