High-speed bus switch supports 5-V interfaces
The new bus switch offers high-speed operation through reduction of capacitance and resistance values while keeping the supply voltage at 5 V, making the device especially attractive for industrial applications.
The TC7MB3257C is a quad SPDT bus switch that operates from a supply voltage between 4.0 V and 5.5 V. In the ON state the switch exhibits a typical terminal capacitance of only 8.5 pF and an ON resistance of 3 W. This results in a 3 dB cut-off frequency of 590 MHz, which represents an improvement compared with previous devices. The resulting reduction of signal rise and fall times enables support of high data speeds.
The TC7MB3257C can operate in multiplexing or full isolation mode. Multiplexing of the active output port is achieved by applying a select signal, while full isolation between input and output can be achieved with the output enable voltage. Additional features of the TC7MB3257C are a maximum quiescent current of only 10 µA, power down protection for all input pins and integrated protection against electrostatic discharge up to 2 kV according to the Human Body Model (HBM).
Toshiba’s TC7MB3257C is available in standard TSSOP16 (TC7MB3257CFT) and VSSOP16 (TC7MB3257CFK) packages as well as the ultra compact VQON16 package (TC7MB3257CFTG) with dimensions of 2.7 mm x 2.7 mm x 0.6 mm. Additionally, the line-up of low capacitance 5 V bus switches is expanded with different SPST options and a single SPDT switch configuration.
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