FSTU32X800QSP

更新时间： 2024-11-12 21:53:35

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		开关
页数	文件大小	规格书
5页	195K
描述
20-Bit Bus Switch with Precharged Outputs and -2V Undershoot Protection

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FSTU32X800QSP 数据手册

November 2002

Revised November 2002

FSTU32X800

20-Bit Bus Switch with Precharged Outputs

and −2V Undershoot Protection

General Description

Features

■ 4Ω switch connection between two ports

The Fairchild Switch FSTU32X800 provides 20-bits of

high-speed CMOS TTL-compatible bus switching. The low

On Resistance of the switch allows inputs to be connected

to outputs without adding propagation delay or generating

additional ground bounce noise. The A and B Ports are

protected against undershoot to support an extended

range to 2.0V below ground. Fairchild’s integrated Under-

shoot Hardened Circuit (UHC ) senses undershoot at the

I/O and responds by preventing voltage differentials from

developing and turning the switch on. The device also pre-

charges the B Port to a selectable bias voltage (BiasV) to

minimize live insertion noise.

■ Undershoot Hardened to -2.0V

■ Soft enable turn-on to minimize bus-to-bus charge

sharing during enable

■ Low l_CC

■ Zero bounce in flow-through mode

■ Output precharge to minimize live insertion noise

■ Control inputs compatible with TTL level

■ See Applications Note AN-5008 for details

The device is organized as two 10-bit switches with a bus

enable (OE_n) signal. When OE_nis LOW, the switch is ON

and Port A is connected to Port B. When OE_nis HIGH, the

switch is OPEN and the B Port is precharged to BiasV

through an equivalent 10-kΩ resistor.

Ordering Code:

Package

Order Number

Package Description

Number

FSTU32X800QSP

MQA48A 48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

UHC is a trademark of Fairchild Semiconductor Corporation.

DS500791

www.fairchildsemi.com

12 3 4 5

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