FS6370-01
EEPROM Programmable 3-PLL Clock Generator IC
1.0 Features
2.0 Description
The FS6370 is a CMOS clock generator IC designed to
minimize cost and component count in a variety of elec-
tronic systems. Three EEPROM-programmable phase-
locked loops (PLLs) driving four programmable muxes
and post dividers provide a high degree of flexibility.
•
Just-in-time customization of clock frequencies via
internal non-volatile 128-bit serial EEPROM
2
ä
•
•
I C -bus serial interface
Three on-chip PLLs with programmable Reference
and Feedback Dividers
An internal EEPROM permits just-in-time factory pro-
•
•
Four independently programmable muxes and post
dividers
gramming of devices for end user requirements.
Programmable power-down of all PLLs and output
Figure 1: Pin Configuration
clock drivers
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VSS
SEL_CD
PD/SCL
VSS
VDD
•
•
Tristate outputs for board testing
CLK_A
VDD
One PLL and two mux/post-divider combinations
can be modified via SEL_CD input
•
•
•
5V to 3.3V operation
Accepts 5MHz to 27MHz crystal resonators
ROM-based device available for cost reduction mi-
gration path – contact your AMI sales representative
for more information
CLK_B
CLK_C
VSS
XIN
XOUT
OE/SDA
VDD
CLK_D
MODE
16-pin (0.150”) SOIC
Figure 2: Block Diagram
XIN
Reference
Oscillator
Mux A
Post
XOUT
CLK_A
CLK_B
CLK_C
Divider A
PLL A
Power Down
Control
MODE
Mux B
Mux C
Post
Divider B
PLL B
PLL C
PD/SCL
I2C-bus
Interface
OE/SDA
Post
Divider C
EEPROM
Mux D
Post
CLK_D
SEL_CD
Divider D
FS6370
I2C is a licensed trademark of Philips Electronics, N.V. American Microsystems, Inc., reserves the right to change the detail specifications as may be required to permit improvements in the design of
its products.