MX8335 Datasheet, PDF (1/6 Pages) Macronix International – RAMBUS CLOCK GENERATOR

INDEX
PRELIMINARY
MX8335
RAMBUS CLOCK GENERATOR
FEATURES
• Clock generator for Rambus^TM Channel
• Provide two Rambus interface-level outputs with
frequency from 200MHz to 267MHz
• Multiplication ratio 40/3 allows low cost crystal used
as frequency reference
• Provide chip output enable pin (EN) for tri-state
control
• 3.0V~3.6V power supply range
• 8-pin SOP (150mil) package
PIN CONFIGURATIONS
8-PIN SOP
EN 1
XO 2
XI 3
GND 4
8 VDD
7 CLKOUT
6 GND
5 CLKOUT
BLOCK DIAGRAM
GENERAL DESCRIPTION
The MX8335 is a clock synthesizer chip for Rambus
channel. With an advanced phase locked loop technol-
ogy, the MX8335 provides two clock outputs (CLKOUT)
with frequency ranging from 200MHz to 267MHz. The
desired high speed clock is the 40/3 Multiplication ratio
of a reference input clock. The reference clock could
be supplied by an external crystal ranging from 15MHz
to 20MHz.
PIN DESCRIPTION
SYMBOL PIN TYPE PIN NUMBER
EN
I
1
XO
O
2
XI
I
3
GND
4
CLKOUT O
5
GND
6
CLKOUT O
7
VDD
8
DESCRIPTION
When high, CLKOUTs are
enabled.
When low, CLKOUTs are
tristate.
With an internal pull high
resistor.
Crystal output pin.
Crystal input pin.
Ground.
200-267Mhz output.
Ground.
200-267Mhz output.
Power supply.
DIVIDER
÷40
XO
15MHz~20MHz
XI
OSC
DIVIDER
÷3
PFC
CHARGE
PUMP
VCO
VDD
EN
LOOP
FILTER
Rambus and
P/N: PM0334
are trademarks of Rambus Inc.
1
200MHz~267MHz
200MHz~267MHz
REV. 1.4, APR. 15, 1996