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W134S Datasheet, PDF (1/12 Pages) Cypress Semiconductor – Direct Rambus Clock Generator
W134M/W134S
Direct Rambus™ Clock Generator
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
REFCLK
MULT0:1
PLL
PCLKM
SYNCLKN
Phase
Alignment
Output
Logic
CLK
CLKB
Pin Configuration
VDDIR
1
REFCLK
2
VDD
3
GND
4
GND
5
PCLKM
6
SYNCLKN
7
GND
8
VDD
9
VDDIPD
10
STOPB
11
PWRDNB
12
24
S0
23
S1
22
VDD
21
GND
20
CLK
19
NC
18
CLKB
17
GND
16
VDD
15
MULT0
14
MULT1
13
GND
S0:1
STOPB
Test
Logic
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-07426 Rev. *B
Revised December 11, 2003