The MXL1544/MAX3175, along with the MXL1543 and MXL1344A, form a complete software-selectable data terminal equipment (DTE) or data communication equipment (DCE) interface port that supports the V.28 (RS-232), V.10/V.11 (RS-449/V.36, EIA-530, EIA-530A, X.21, RS-423), and V.35 protocols.
The MXL1544/MAX3175 are four‑driver/four‑receiver multiprotocol transceivers that operate from a single +5 V supply and work with the MXL1543 charge‑pump. They support V.28 (RS‑232), V.10/V.11 (RS‑449/V.36, EIA‑530, EIA‑530A, X.21, RS‑423) and V.35 protocols and are offered in a 28‑pin SSOP package.
The document provides absolute maximum ratings, detailed electrical characteristics, pin descriptions, and typical operating curves for both the MXL1544 and the MAX3175 (which adds a 10 µs receiver input deglitching circuit).
| Supply Voltage VCC | -0.3 V to +6 V |
|---|---|
| Operating Temperature Range | 0 °C to +70 °C |
| No‑Cable Mode Shutdown Current | 0.5 µA |
| Receiver Input Deglitching (MAX3175 only) | 10 µs |
The MAX3175 is identical to the MXL1544 except it adds a 10 µs glitch‑rejection circuit at the receiver inputs.
It operates from a single +5 V supply, with VCC ranging from –0.3 V to +6 V, VDD from –0.3 V to +7.2 V, and VEE from +0.3 V to –7 V.
Both devices are available in a 28‑pin SSOP package.