Direct Rambus™ Clock Generator
W134M/W134S
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
, CA 95134
•
408-943-2600
Document #: 38-07426 Rev. *B
Revised December 11, 2003
Features
• Differential clock source for Direct Rambus™ memory
subsystem for up to 800-MHz data transfer rate
• Provide synchronization flexibility: the Rambus®
Channel can optionally be synchronous to an external
system or processor clock
• Power-managed output allows Rambus Channel clock
to be turned off to minimize power consumption for
mobile applications
• Works with Cypress CY2210, W133, W158, W159, W161,
and W167 to support Intel® architecture platforms
• Low-power CMOS design packaged in a 24- pin QSOP
(150-mil SSOP) package
Description
The Cypress W134M/W134S provides the differential clock
signals for a Direct Rambus memory subsystem. It includes
signals to synchronize the Direct Rambus Channel clock to an
external system clock but can also be used in systems that do
not require synchronization of the Rambus clock.
Block Diagram
Pin Configuration
PLL
Phase
PCLKM
MULT0:1
REFCLK
SYNCLKN
Output
Logic
Logic
Test
Alignment
STOPB
S0:1
CLK
CLKB
S0
S1
VDD
GND
CLK
NC
CLKB
GND
VDD
MULT0
MULT1
GND
24
23
22
21
20
19
18
17
16
15
14
13
VDDIR
REFCLK
VDD
GND
GND
PCLKM
SYNCLKN
GND
VDD
VDDIPD
STOPB
PWRDNB
1
2
3
4
5
6
7
8
9
10
11
12
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