The MAX4684/MAX4685 are low on-resistance, low-voltage, dual single-pole/double-throw (SPDT) analog switches that operate from a single +1.8V to +5.5V supply. The MAX4684 features a 0.5Ω (max) on-resistance for its normally closed (NC) switch and a 0.8Ω (max) on-resistance for its normally open (NO) switch at a +2.7V supply. The MAX4685 features a 0.8Ω max on-resistance for both its 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 PCB area. The chip occupies only a 2.0mm x 1.50mm area. The 4 x 3 array of solder bumps are spaced with a 0.5mm bump pitch.
The MAX4684 and MAX4685 are low‑on‑resistance, low‑voltage dual single‑pole/double‑throw (SPDT) analog switches that operate from a single +1.8 V to +5.5 V supply. They are intended for applications such as speaker/headset switching, power routing, battery‑operated equipment, and audio/video signal routing.
Key electrical characteristics include an NC on‑resistance of 0.5 Ω (MAX4684) and 0.8 Ω (MAX4685), a NO on‑resistance of 0.8 Ω for both devices, turn‑on time of 50 ns, turn‑off time of 40 ns, off‑isolation of –64 dB, and crosstalk of –68 dB at 100 kHz. The devices are packaged in a chip‑scale UCSP package measuring 2.0 mm × 1.5 mm with a 0.5 mm bump pitch.
| Supply Voltage Range | +1.8 V to +5.5 V |
|---|---|
| NC On‑Resistance (MAX4684) | 0.5 Ω (max) at +2.7 V |
| NO On‑Resistance (both devices) | 0.8 Ω (max) at +2.7 V |
| Turn‑On Time | 50 ns (typical at +3 V) |
| Turn‑Off Time | 40 ns (typical at +3 V) |
| Off‑Isolation | -64 dB at 100 kHz |
| Crosstalk | -68 dB at 100 kHz |
| Supply Current | 50 nA (max) |
| Leakage Current | 1 nA (max) at 25 °C |
| Package Size | 2.0 mm × 1.5 mm |
| Bump Pitch | 0.5 mm |
| Operating Temperature Range | -40 °C to +85 °C |
They operate from a single +1.8 V to +5.5 V supply.
Off‑isolation is –64 dB at 100 kHz.