FS6377-01/FS6377-01g Programmable 3-PLL Clock Generator IC
1.0 Features
• Three on-chip PLLs with programmable reference
and feedback dividers
• Four independently programmable muxes and post
dividers
• I
2
C™-bus serial interface
• Programmable power-down of all PLLs and output
clock drivers
Data Sheet
• One PLL and two mux/post-divider combinations can
be modified by SEL_CD input
• Tristate outputs for board testing
• 5V to 3.3V operation
• Accepts 5MHz to 27MHz crystal resonators
• Commercial (FS6377-01) and industrial (FS6377-01i)
temperature ranges
2.0 Description
The FS6377 is a CMOS clock generator IC designed to
minimize cost and component count in a variety of
electronic systems. Three I
2
C-programmable phase-
locked loops feeding four programmable muxes and post
dividers provide a high degree of flexibility.
SDA
SEL_CD
PD
VSS
XIN
XOUT
OE
VDD
1
2
3
16
15
14
SCL
CLK_A
VDD
CLK_B
CLK_C
VSS
CLK_D
ADDR
FS6377
4
5
6
7
8
13
12
11
10
9
16-pin (0.150") SOIC
Figure 1: Pin Configuration
XIN
XOUT
Reference
Oscillator
PLL A
Mux A
Post
Divider A
CLK_A
PD
Power Down
Control
PLL B
Mux B
Post
Divider B
CLK_B
SCL
SDA
ADDR
I
2
C-bus
Interface
PLL C
Mux C
Post
Divider C
CLK_C
SEL_CD
Mux D
Post
Divider D
CLK_D
OE
FS6377
Figure 2: Block Diagram
AMI Semiconductor
www.amis.com
1
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