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General Description

The MAX4684/MAX4685 low on-resistance (RON), low voltage, dual single-pole/double-throw (SPDT) analog switches operate from a single +1.8V to +5.5V supply.

The MAX4684 features a 0.5Ω (max) RON for its NC switch and a 0.8Ω (max) RON for its NO switch at a +2.7V supply. The MAX4685 features a 0.8Ω max on resistance for both NO and NC switches at a +2.7V supply.

Both parts feature break-before-make switching action (2ns) with tON = 50ns and tOFF = 40ns at +3V. The digital logic inputs are 1.8V logic-compatible with a +2.7V to +3.3V supply.

The MAX4684/MAX4685 are packaged in the chipscale package (UCSP)?, significantly reducing the required PC board area. The chip occupies only a 2.0mm ? 1.50mm area. The 4 ? 3 array of solder bumps are spaced with a 0.5mm bump pitch.

Features

? 12-Bump, 0.5mm-Pitch UCSP

? NC Switch RON

?? 0.5Ω max (+2.7V Supply) (MAX4684)

?? 0.8Ω max (+2.7V Supply) (MAX4685)

? NO Switch RON

?? 0.8Ω max (+2.7V Supply)

? RON Match Between Channels

?? 0.06Ω (max)

? RON Flatness Over Signal Range

?? 0.15Ω (max)

? +1.8V to +5.5V Single-Supply Operation

? Rail-to-Rail Signal Handling

? 1.8V Logic Compatibility

? Low Crosstalk: -68dB (100kHz)

? High Off-Isolation: -64dB (100kHz)

? THD: 0.03

? 50nA (max) Supply Current

? Low Leakage Currents

?? 1nA (max) at TA = +25°C

??

Applications

?? Speaker Headset Switching

?? MP3 Players

?? Power Routing

?? Battery-Operated Equipment

?? Relay Replacement

?? Audio and Video Signal Routing

?? Communications Circuits

?? PCMCIA Cards

?? Cellular Phones

?? Modems