FST3125M ,4-Bit Bus SwitchFST3125 4-Bit Bus SwitchAugust 1997Revised January 2005FST31254-Bit Bus Switch
FST3125MTC ,4-Bit Bus SwitchFeaturesThe Fairchild Switch FST3125 provides four high-speed
FST3125
4-Bit Bus Switch
FST3125 4-Bit Bus Switch August 1997 Revised January 2001 FST3125 4-Bit Bus Switch General Description Features The Fairchild Switch FST3125 provides four high-speed4Ω switch connection between two ports. CMOS TTL-compatible bus switches. The low on resis-Minimal propagation delay through the switch. tance of the switch allows inputs to be connected to out- Low l . CC puts without adding propagation delay or generating Zero bounce in flow-through mode. additional ground bounce noise. Control inputs compatible with TTL level. The device is organized as four 1-bit switches with sepa- rate OE inputs. When OE is LOW, the switch is ON and Port A is connected to Port B. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Ordering Code: Order Number Package Number Package Description FST3125M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow FST3125QSC MQA16 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide FST3125MTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Diagram Connection Diagrams Pin Assignment for SOIC and TSSOP Pin Assignment for QSOP Pin Descriptions Pin Name Description Truth Table OE , OE , OE , OE Bus Switch Enables 1 2 3 4 Inputs Inputs/Outputs 1A, 2A, 3A, 4A Bus A OE A,B 1B, 2B, 3B, 4B Bus B LA = B NC Not Connected HZ © 2001 DS500043
