BCT4157

October, 2008, REV2.0 BCT4157 Low-Voltage, 2.5Ω, 300MHz SPDT Analog Switch General Description The BCT4157 is a high-bandwidth, fast single-pole double-throw (SPDT) CMOS switch. It can be used as an analog switch or as a low-delay bus switch. Specified over a wide operating power supply voltage range, 1.65V to 5.5V, the BCT4157 has a maximum ON resistance of 4.5-ohms at 2.7V, and 3.5-ohms at 4.5V. Break-before-make switching prevents both switches being enabled simultaneously. This eliminates signal disruption during switching. The control input, S, tolerates input drive signals up to 5.5V, independent of supply voltage. BCT4157 is an improved direct replacement for the FSA3157/NC7SB3157 Features ♦CMOS Technology for Bus and Analog Applications ♦ Low ON Resistance: 2.5-ohms @ 4.5V ♦ Wide VCC Range: 1.65V to 5.5V ♦ Rail-to-Rail Signal Range ♦ Control Input Overvoltage Tolerance: 5.5V min. ♦ High Off Isolation: 57dB at 10MHz ♦ 54dB (10MHz) Crosstalk Rejection Reduces S...