Fairchild FST16245 Data Handbook

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16245 16-B it B s S itch

April 2001 Revised April 2001

FST16245 16-Bit Bus Switch General Description Features The Fairchild Switch FST16245 provides 16-bits of high- 4Ω switch connection between two ports. speed CMOS TTL-compatible bus switching. The low On

Minimal propagation delay through the switch.

Resistance of the switch allows inputs to be connected to

Low l CC.

outputs without adding propagation delay or generating

additional ground bounce noise. Zero bounce in flow-through mode. The device is organized as a 16-bit switch. There are two Control inputs compatible with TTL level.

8-bit switches with separate output enable inputs. When OE is LOW, the switch is ON and Port a is connected to Port B. When OE is HIGH, the switch is OFF and a high impedance state exists between the A and B Ports.

Ordering Code: Order Number Package Number Package Description FST16245MTD MTD48 48-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.

Connection Diagram Logic Diagram

Pin Descriptions Truth Table Pin Name Description Inputs Outputs

OEx A, B

OEn Output Enable Input (Active LOW)

1An, 2An, 3An, 4An Bus A A Port = B Port

1Bn, 2Bn, 3Bn, 4Bn Bus B

NC No Internal Connection H = HIGH Voltage Level L = LOW Voltage Level Z = High Impedance

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