IDT74FST163P245
16-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
16-BIT BUS SWITCH
FEATURES:
IDT74FST163P245
DESCRIPTION:
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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, TSSOP, and TVSOP packages
The FST163P245 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 between input and output ports is small. Without adequate bias on the gateto-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 FST163P245 supports precharge of the B port. When xOE is high,
the A and B ports are isolated, and the B port's pins are precharged to the
bias voltage through the equivalent of a 10KΩ resistor on each B port pin.
FUNCTIONAL BLOCK DIAGRAM
VBIAS1
1A1
1B1
1A8
1B8
VBIAS1
2A1
2B1
2A8
2B8
1OE
2OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 1999
1
© 1999 Integrated Device Technology, Inc.
DSC-5514/1
