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INDUSTRIALTEMPERATURERANGE

IDT74FST163233

16-BIT 2:1 MUX/DEMUX SWITCH

OCTOBER 2008

INDUSTRIAL TEMPERATURE RANGE

© 2002 Integrated Device Technology, Inc.

DSC-5517/3

FEATURES:

• Bus switches provide zero delay paths

• Low switch on-resistance

• TTL-compatible input and output levels

• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using

machine model (C = 200pF, R = 0)

• Hot insertion capability

• Very low power dissipation

• Available in SSOP and TSSOP packages

FUNCTIONAL BLOCK DIAGRAM

IDT74FST163233

16-BIT 2:1 MUX/DEMUX

SWITCH

DESCRIPTION:

The FST163233 belongs to IDT's family of Bus switches. Bus switch

devices perform the function of connecting or isolating two ports without

providing any inherent current sink or source capability. Thus they

generate little or 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 be-

tween input and output ports is small. Without adequate bias on the gate-

to-source junction of the FET, the FET is turned off, therefore with no VCC

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 FST163233 provides three 16-bit TTL-compatible ports that sup-

port 2:1 multiplexing. The SEL0,1 and TEST0,1 pins provide switch enable

and mux select control as shown below.

The A port can be connected to port 1B or port 2B or both ports 1B and

2B.

SEL0

O ne of 16 Channels

TEST0

0A1-8

2B1-8

1B1-8

SEL1

TEST1

1A9-16

2B9-16

1B9-16

O ne of 16 Channels