The MAX4737/MAX4738/MAX4739 low-voltage, low on-resistance (RON), quad single-pole/single throw (SPST) analog switches operate from a single +1.8V to +5.5V supply. These devices are designed for USB 1.1 and audio switching applications. The MAX4737/MAX4738/MAX4739 feature 4.5Ω RON (max) with 1.2Ω flatness and 0.4Ω matching between channels. These new switches feature guaranteed operation from +1.8V to +5.5V and are fully specified at 3V and 5V. These switches offer break-before-make switching (1ns) with tON <80ns and tOFF <40ns at +2.7V. The digital logic inputs are +1.8V logic compatible with a +2.7V to +3.6V supply. These switches are packaged in a chip-scale package (UCSP™), significantly reducing the required PC board area. The chip occupies only a 2mm x 2mm area and has a 4 x 4 bump array with a bump pitch of 0.5mm. These switches are also available in a 14-pin TSSOP and a 16-pin thin QFN (4mm x 4mm) package.
The MAX4737, MAX4738, and MAX4739 are low‑voltage quad SPST analog switches offered in UCSP, TSSOP, and thin‑QFN packages. They operate from a single supply of +1.8 V to +5.5 V and are designed for USB 1.1 signal‑switching and other high‑speed applications.
Key features include on‑resistance as low as 0.1 Ω, low crosstalk, high off‑isolation, and fast turn‑on/off times. The datasheet provides absolute maximum ratings, detailed electrical characteristics for both +3 V and +5 V supply options, and typical operating curves such as leakage current versus temperature.
| Off‑Isolation (10 MHz) | -55 dB |
|---|---|
| Crosstalk (10 MHz) | -80 dB |
| Input Logic High Voltage (+3 V supply) | 1.4 V |
Off‑isolation is -55 dB at 10 MHz.
Crosstalk is -80 dB at 10 MHz.