CM3107-12SH

更新时间： 2024-02-17 18:12:00

品牌	Logo	应用领域
CALMIRCO		稳压器双倍数据速率
页数	文件大小	规格书
13页	1214K
描述
2 Amp Source/ Sink Bus Termination Regulator for DDR Memory and Front Side Bus Applications

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CM3107-12SH 数据手册

CM3107

2 Amp Source/ Sink Bus Termination Regulator

for DDR Memory and Front Side Bus Applications

Features

Product Description

•

Ideal for Intel 865 Front Side Bus V and DDR

The CM3107 is a sinking and sourcing regulator specif-

ically designed for series-parallel bus termination for

high-speed chip set busses as well as DDR memory

systems. It can source and sink current up to 2.0A with

applications

•

Sinks and sources 2 Amps

Over current protection

Over temperature protection

Integrated power MOSFETs

a load regulation of 0.5%. The V output voltage is

selectable by V

SEL and FSBSEL pins. The

DDQ

Excellent accuracy (0.5% load regulation)

SEL pin controls whether the CM3107 is in DDR

DDQ

Selectable output (1.225V/1.45V or V

/2)

DDQ

memory mode with V =V

/2, or in FSB mode. In

DDQ

•

8-lead SOIC and PSOP packages

Lead-free versions available

FSB mode, FSBSEL controls whether V is 1.225V or

1.45V. This allows the same chip to be used in two dif-

ferent circuits on an Intel 865-based motherboard.

Applications

The CM3107 provides over current and over tempera-

ture protection, which protect the chip from excessive

heating due to high current and high temperature. A

shutdown capability using an external transistor

reduces power consumption and provides a high

impedance output.

•

Intel 865/845 Front Side Bus termination

Single and dual DDR memory termination

Active termination buses

Graphics card DDR memory termination

The CM3107 is housed in 8-lead SOIC and PSOP

packages and is available with optional lead-free finish-

ing.

Simplified Electrical Schematic

SEL FSBSEL

DDQ

Output

Select

Over Temp

Over Current

Reference

Driver

OUT

REF

Buffer

SENSE

GND

02/02/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

12 3 4 5 6 7...13

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