September 1997
Revised December 1999
FST16233
16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch
General Description
The Fairchild Switch FST16233 is a 16-bit to 32-bit highspeed CMOS TTL-compatible multiplexer/demultiplexer bus switch. 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 device can be used in applications where two buses need to be addressed simultaneously. The FST16233 can be used as two 8-bit to 16-bit multiplexers or as one 16-bit to 32-bit multiplexer.
Two select (SEL1, SEL0) and two test (TEST0, TEST1) inputs provide switch enable and multiplexer select control.
The FST16233 is designed to prevent through-current when switching buses.
Features
■4Ω switch connection between two ports.
■Minimal propagation delay through the switch.
■Low lCC.
■Zero bounce in flow-through mode.
■Control inputs compatible with TTL level.
Ordering Code:
Order Number |
Package Number |
Package Description |
|
|
|
FST16233MEA |
MS56A |
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide |
|
|
|
FST16233MTD |
MTD56 |
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide |
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|
|
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Switch Bus Multiplexer/Demultiplexer Bit-32 to Bit-16 FST16233
© 1999 Fairchild Semiconductor Corporation |
DS500055 |
www.fairchildsemi.com |
FST16233
Connection Diagram
Pin Descriptions
|
Pin Name |
Description |
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SEL0, SEL1 |
Select Inputs |
|
TEST0, TEST1 |
Test Inputs |
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A |
Bus A |
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|
|
B1, B2 |
Bus B |
Truth Table |
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Inputs |
Function |
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SEL |
|
TEST |
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|
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|
|
|
|
L |
|
L |
A = |
B1 |
H |
|
L |
A = |
B2 |
X |
|
H |
A = B1 and A = B2 |
|
www.fairchildsemi.com |
2 |
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