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FS7140-01 Datasheet(PDF) 10 Page - AMI SEMICONDUCTOR

Part # FS7140-01
Description  Programmable Phase-Locked Loop Clock Generator
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Manufacturer  AMI [AMI SEMICONDUCTOR]
Direct Link  http://www.amis.com
Logo AMI - AMI SEMICONDUCTOR

FS7140-01 Datasheet(HTML) 10 Page - AMI SEMICONDUCTOR

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AMI Semiconductor - Rev. 3.0
www.amis.com
FS7140-01 / FS7140-01g / FS7145 Programmable Phase-Locked Loop Clock Generator Data Sheet
Table 9: Post Divider Control Bits
Name
Description
POST1[3:0]
POST Divider #1 (NP1) Modulus
[0000]
1
[0001]
2
[0010]
3
[0011]
4
[0100]
5
[0101]
6
[0110]
7
[0111]
8
[1000]
9
[1001]
10
[1010]
11
[1011]
12
[1100]
Do not use
[1101]
[1110]
[1111]
POST2[3:0]
POST Divider #2 (NP2) Modulus
[0000]
1
[0001]
2
[0010]
3
[0011]
4
[0100]
5
[0101]
6
[0110]
7
[0111]
8
[1000]
9
[1001]
10
[1010]
11
[1011]
12
[1100]
Do not use
[1101]
[1110]
[1111]
POST3[1:0]
POST Divider #3 (NP3) Modulus
[00]
1
[01]
2
[10]
4
[11]
8
Table 7: PLL Divider Control Bits
NAME
DESCRIPTION
REFDIV[11:0]
REFerence DIVider (NR)
FBKDIV[13:0]
FeedBacK DIVider (NR)
Table 8: SYNC Control Bits (FS7145 only)
Name
Description
SYNCEN
SYNC Enable
[0] = Disabled / [1] = Enabled
SYNCPOL
SYNC POLarity
[0] = Negative Edge / [1] = Positive Edge
Table 5: Device Configuration Bits
Name
Description
REFDSRC
REFerence Divider SouRCe
[0] = Crystal Oscillator / [1] = REF Pin
FBKDSRC
FeedB ack Divider SouRCe
[0] = VCO Output / [1] = Post Divider Output
SHUT1
SHUTdown1
[0] = Normal / [1] = Powered Down
SHUT2
SHUTdown2
[0] = Normal / [1] = Powered Down
CMOS
CLKP/CLKN Output Mode
[0] = PECL Output / [1] CMOS Output
Table 6: Main Loop Tuning Bits
Name
Description
CP[1:0]
Charge Pump Current
[00]
2.0
mA
[01]
4.5
mA
[10]
11.0
mA
[11]
22.5
mA
LR[1:0]
Loop Filter Resistor Select
[00]
400K
W
[01]
133K
W
[10]
30K
W
[11]
12K
W
LC
Loop Filter Capacitor Select
[0]
185pF
[1]
500pF


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