FSA4157 and FSA4157A are high performance Single Pole/Double Throw (SPDT) analog switches. Both devices feature ultra low R_ON of 1.15 ohm maximum at 4.5V V_CC and will operate over the wide V_CC range of 1.65V to 5.5V for FSA4157, and 2.7V to 5.5V for FSA4157A. The device is fabricated with sub-micron CMOS technology to achieve fast switching speeds and is designed for break-before-make operation. The select input is TTL level compatible.

The FSA4157A features very low quiescent current even when the control voltage is lower than the V_CC supply. This feature services the mobile handset applications very well allowing for the direct interface with baseband processor general purpose I/Os.

• FSA4157A Features Lower I_CC when the S Input is Lower Than V_CC
• Maximum 1.15W On Resistance (R_ON) at 4.5V V_CC
• 0.3W max R_ON Flatness at 4.5V V_CC
• Space-Saving 6-lead Pb-Free MicroPak™ and SC70 Packages
• Broad V_CC Operating Range:

  • FSA4157: 1.65V to 5.5V

  • FSA4157A: 2.7V to 5.5V

• Fast Turn-On and Turn-Off Time
• Break-Before-Make Enable Circuitry
• Over-Voltage Tolerant TTL Compatible Control Circuitry