Single SPST normally-closed analog switch with wide supply range
The MAX4657ESA+ is a single-pole single-throw (SPST) analog switch in a normally-closed (NC) configuration — the signal path is closed when the control input is low.
Switching speed and charge injection — what they mean for signal integrity
Turn-on time is 200 ns max, turn-off 100 ns max, which keeps switching transients short for multiplexed data acquisition or audio routing. Charge injection is specified at 23 pC — a moderate figure that can cause a glitch on the signal when the switch opens or closes; for high-impedance sample-and-hold circuits, budget for a settling period after switching. Off-leakage current is 1 nA max, so the switch introduces negligible DC error in high-impedance sensor paths. Channel capacitance (both CS(off) and CD(off)) is 25 pF, which contributes to the bandwidth roll-off but is acceptable for most analog signal chains below 100 MHz.
Package and mounting — design-in checklist
The MAX4657ESA+ is supplied in an 8-pin SOIC package (8-SOIC, 0.154" body width, 3.90 mm width) with a surface-mount footprint. The supplier device package is 8-SOIC. It ships in Tube form. The package is standard SOIC-8, so PCB layout matches any generic SOIC-8 land pattern.
Lifecycle and compliance
The MAX4657ESA+ is listed as Active in production status. It is ROHS3 compliant.