Product Overview
The SN74CBTLV3257PW is a TI 4-bit 2:1 FET multiplexer/demultiplexer bus switch. 5 Ohm typical on-resistance with 200 MHz bandwidth. 2.3V-3.6V supply with rail-to-rail I/O capability. Sub-250ps propagation delay for high-speed bus routing. TSSOP-16 package ideal for space-constrained designs.
Key Specifications
| Type | 4-bit 2:1 Multiplexer/Demultiplexer Bus Switch |
| Channels | 4 x 2:1 |
| Bandwidth | 200 MHz |
| On Resistance | 5 Ohm typ |
| Supply Voltage | 2.3V to 3.6V |
| I/O Voltage | 0 to 3.6V |
| Propagation Delay | 0.25 ns typ |
| Operating Temp | -40 to +85C |
| Package | TSSOP-16 |
Working Principle
The device uses N-channel pass-gate FET transistors as analog switches. Select inputs (S) choose between the A or B port for each of the 4-bit channels. The output enable (OE) pin tri-states all outputs when asserted. The low 5 Ohm Ron and sub-nanosecond propagation delay make it ideal for high-speed digital bus multiplexing. Charge injection is minimized through balanced FET sizing.
Applications
- Bus multiplexing
- Memory bank switching
- Peripheral selection
- Hot plug applications