July 1997
Revised December 1999
FST16213
24-Bit Bus Exchange Switch
General Description
The Fairchild Switch FST16213 provides 24-bits of highspeed CMOS TTL-compatible bus switching or exchanging. 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 operates as a 24-bit bus switch or a 12-bit bus exchanger, which allows data exchange between the four signal ports via the data-select terminals.
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 |
|
|
|
FST16213MEA |
MS56A |
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide |
|
|
|
FST16213MTD |
MTD56 |
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide |
|
|
|
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Switch Exchange Bus Bit-24 FST16213
© 1999 Fairchild Semiconductor Corporation |
DS500039 |
www.fairchildsemi.com |
FST16213
Connection Diagram
Pin Descriptions
Pin Name |
Description |
|
|
S2, S1, S0 |
Data-select inputs |
|
|
A1, A2 |
Bus A |
B1, B2 |
Bus B |
Truth Table
S2 S1 |
S0 |
A1 |
A2 |
Function |
|
L |
L |
L |
Z |
Z |
Disconnect |
L L H |
B1 |
Z |
A1 = B1 |
||
L H L |
B2 |
Z |
A1 = B2 |
||
L H H |
Z |
B1 |
A2 = B1 |
||
H L L |
Z |
B2 |
A2 = B2 |
||
H |
L |
H |
A2 and B2 |
A1 and B2 |
A1 = A2 = B2 |
H H L |
B1 |
B2 |
A1 = B1, A2 = B2 |
||
H H H |
B2 |
B1 |
A1 = B2, A2 = B1 |
||
www.fairchildsemi.com |
2 |
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