Data Sheet
FS7140-01 / FS7140-01g / FS7145 Programmable Phase-Locked Loop Clock Generator
Table 1: FS7140 Pin Descriptions
Pin
1
Type
DI
Name
SCL
Description
Serial Interface Clock (requires an external pull-up)
Serial Interface Data Input/Output (requires an external pull-up)
Address Select Bit "0"
Ground
2
DIO
SDA
D
DI
3
ADDR0
VSS
4
P
AI
5
XIN
Crystal Oscillator Feedback
Crystal Oscillator Drive
Address Select Bit "1"
Power Supply (+3.3V nominal)
PECL Current Drive Programming
No Connection
6
AO
XOUT
ADDR1
VDD
IPRG
n/c
D
DI
7
8
P
AI
-
9
10
11
12
13
14
15
16
P
DIU
VSS
Ground
REF
Reference Frequency Input
No Connection
-
n/c
P
VDD
CLKP
CLKN
Power Supply (+3.3V nominal)
Clock Output
DO
DO
Inverted Clock Output
D
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DIU = Input with Internal Pull-Up; DI = Input with Internal Pull-Down; DIO = Digital Input/Output;
DI-3 = Three-Level Digital Input, DO = Digital Output; P = Power/Ground; # = Active Low pin
Table 2: FS7145 Pin Descriptions
Pin
1
Type
DI
Name
SCL
Description
Serial Interface Clock (requires an external pull-up)
Serial Interface Data Input/Output (requires an external pull-up)
Address Select Bit "0"
2
DIO
SDA
D
DI
3
ADDR0
VSS
4
P
AI
Ground
5
XIN
Crystal Oscillator Feedback
Crystal Oscillator Drive
6
AO
XOUT
ADDR1
VDD
D
DI
7
Address Select Bit "1"
8
P
AI
Power Supply (+3.3V nominal)
PECL Current Drive Programming
No Connection
9
IPRG
n/c
10
11
12
13
14
15
16
-
P
VSS
Ground
DIU
DIU
P
REF
Reference Frequency Input
Synchronization Input
SYNC
VDD
Power Supply (+3.3V nominal)
Clock Output
DO
DO
CLKP
CLKN
Inverted Clock Output
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DIU = Input with Internal Pull-Up; DI = Input with Internal Pull-Down; DIO = Digital Input/Output;
DI-3 = Three-Level Digital Input, DO = Digital Output; P = Power/Ground; # = Active Low pin
D
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