FSTD3125 Datasheet | Fairchild Semiconductor

FSTD3125 4-Bit Bus Switch with Level Shifting June 2001 Revised June 2001 FSTD3125 4-Bit Bus Switch with Level Shifting General Description The Fairchild Switch FSTD3125 provides four high-speed CMOS TTL-patible bus switches. The low On Resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. A diode to VCC has been integrated into the circuit to allow for level shifting between 5V inputs and 3.3V outputs. The device is organized as four 1-bit switches with separate 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. Features s 4Ω switch connection between two ports s Minimal propagation delay through the switch s Low l CC s Zero bounce in flow-through mode s Control inputs patible with TTL level s Tru Translation voltage translation from 5.0V inputs to 3.3V outputs Ordering Code: Order Number FSTD3125M FSTD3125QSC FSTD3125MTC Package Number M14A MQA16 MTC14 Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide 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. Connection Diagrams Pin Assignment for SOIC and TSSOP Pin Descriptions Pin Name OE1, OE2, OE3, OE4 1A, 2A, 3A, 4A 1B, 2B, 3B, 4B NC Description Bus Switch Enables Bus A Bus B Not Connected Truth Table Inputs OE Pin Assignment for QSOP L H Inputs/Outputs A, B A=B Z Tru Translation is a trademark of Fairchild Semiconductor Corporation. © 2001 Fairchild Semiconductor Corporation DS500448 .fairchildsemi. Logic Diagram .fairchildsemi....