Integrated Device Technology, Inc.

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

FEATURES:

• Bus switches provide zero delay paths

• Extended commercial range of –40

°C to +85°C

• Low switch on-resistance:

FST163xxx – 5

Ω

FST163Pxxx – 5

Ω with precharge

• TTL-compatible input and output levels

• ESD > 2000V per MIL-STD-883, Method 3015;

> 200V using machine model (C = 200pF, R = 0)

• Available in SSOP, TSSOP and TVSOP

COMMERCIAL TEMPERATURE RANGE

FEBRUARY 1997

©1997 Integrated Device Technology, Inc.

DSC-3513/-

1

IDT74FST163245

IDT74FST163P245

ADVANCE INFORMATION

16-BIT BUS SWITCH

no noise of their own while providing a low resistance path for

an external driver. These devices connect input and output

ports through an n-channel FET. When the gate-to-source

junction of this FET is adequately forward-biased the device

conducts and the resistance between input and output ports

is small. Without adequate bias on the gate-to-source junction

applied, the device has hot insertion capability.

The low on-resistance and simplicity of the connection

between input and output ports reduces the delay in this path

to close to zero.

The FST163245 and FST163P245 are 16-bit TTL-compat-

ible bus switches. The

OE pins provide enable control. The

FST163P245 supports precharge on the B port. So when

OE

is high, A and B ports are isolated and B outputs are precharged

to the bias voltage through the equivalent of a 10K

Ω resistor

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION:

The FST163245/163P245 belong to IDT's family of Bus

switches. Bus switch devices perform the function of connect-

ing or isolating two ports without providing any inherent

current sink or source capability. Thus they generate little or

PIN DESCRIPTION

1OE

2OE

1OE

2OE

FST163245

FST163P245

3513 drw 01

Pin Names

I/O

Description

I/O

Bus A

I/O

Bus B

1

OE, 2OE

I

Bus Switch Enable (Active LOW)

I

Precharge Reference Voltage

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