General Description
The MAX4644 is a single-pole/double-throw (SPDT) switch that operates from a single supply ranging from +1.8V to +5.5V. It provides low 4Ω on-resistance (RON) as well as 1Ω RON flatness over the entire analog-signal range. The MAX4644 offers fast switching times of less than 20ns while ensuring break-before-make operation. It typically consumes only 0.01μW of quiescent power, making it suitable for use in low-power, portable applications.

Features
♦ +1.8V to +5.5V Single-Supply Operation
♦ Rail-to-Rail Analog-Signal Range
♦ Guaranteed RON
    4Ω max (+5V Supply)
    8Ω max (+3V Supply)
♦ +1.8V Operation
    RON 30Ω (typ) Over Temperature
    tON 18ns (typ), tOFF 12ns typ
♦ Guaranteed RON Flatness: 0.75Ω (typ) (+5V Supply)
♦ Guaranteed RON Match Between Channels: 0.1Ω typ (+5V Supply)
♦ Low Leakage (< 0.35nA) Over Entire Temperature Range
♦ Excellent AC Characteristics
    Low Crosstalk: -82dB at 1MHz
    High Off-Isolation: -80dB at 1MHz
    0.018% Total Harmonic Distortion
♦ Low Power Consumption: < 0.01µW

Applications
    Battery-Operated Equipment
    Audio and Video Signal Routing
    Low-Voltage Data-Acquisition Systems
    Sample-and-Hold Circuits
    Communications Circuits