ASM2I2314ANZ Datasheet, PDF (1/13 Pages) Alliance Semiconductor Corporation – 14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs

June 2005
rev 0.4
ASM2I2314ANZ
14 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
Features
ƒ One input to 14 output Buffer/Driver
ƒ Supports up to three SDRAM DIMMs
ƒ Two additional outputs for feedback
ƒ Serial interface for output control
ƒ Low skew outputs
ƒ Up to 133MHz operation
ƒ Multiple V_DD and V_SS pins for noise reduction
ƒ Dedicated OE pin for testing
ƒ Low EMI outputs
ƒ 28 Pin SOIC (300-mil) package
ƒ 3.3V operation
Functional Description
The ASM2I2314ANZ is a 3.3V buffer designed to distribute
high-speed clocks in desktop PC applications. The part has
14 outputs, 12 of which can be used to drive up to three
SDRAM DIMMs, and the remaining can be used for
external feedback to a PLL. The device operates at 3.3V
and outputs can run up to 133MHz, thus making it
compatible with Pentium^®* II processors. The
ASM2I2314ANZ can be used in conjunction with the clock
synthesizer for a complete Pentium II motherboard
solution. The ASM2I2314ANZ also includes a serial
interface which can enable or disable each output clock.
On power-up, all output clocks are enabled. A separate
Output Enable pin facilitates testing on ATE.
Block Diagram
BUF_IN
SDATA
SCLOCK
OE
*Pentium is a registered trademark of Intel Corporation.
Serial Interface
Decoding
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
SDRAM10
SDRAM11
SDRAM12
SDRAM13
Alliance Semiconductor
2575, Augustine Drive • Santa Clara, CA • Tel: [phone] • Fax: [phone] • www.alsc.com
Notice: The information in this document is subject to change without notice.