ASM2I2313ANZ Datasheet, PDF (1/13 Pages) Alliance Semiconductor Corporation – 13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs

June 2005
rev 0.4
ASM2I2313ANZ
13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
Features
ƒ One input to 13 Output Buffer/Driver
ƒ Supports up to three SDRAM DIMMs
ƒ One 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 Low EMI outputs
ƒ 28 pin SOIC (300-mil) Package
ƒ 3.3V operation
Functional Description
The ASM2I2313ANZ is a 3.3V buffer designed to distribute
high-speed clocks in desktop PC applications. The part has
13 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
ASM2I2313ANZ can be used in conjunction with the clock
synthesizer for a complete Pentium II motherboard
solution. The ASM2I2313ANZ also includes a serial
interface, which can enable or disable each output clock.
On power-up, all output clocks are enabled.
*Pentium is a registered trademark of Intel Corporation.
Block Diagram
BUF_IN
SDATA
SCLOCK
Serial Interface
Decoding
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
SDRAM10
SDRAM11
SDRAM12
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.