The MXL1543B is a three-driver/three-receiver multiprotocol transceiver that operates from a +5V single supply. The MXL1543B, along with the MXL1544/MAX3175 and the 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), and V.35 protocols. The MXL1543B transceivers carry the high-speed clock and data signals while the MXL1544/MAX3175 carry the control signals. The MXL1543B can be terminated by the MXL1344A software-selectable resistor termination network or by discrete termination networks. An internal charge pump and a proprietary low-dropout transmitter output stage allow V.11-, V.28-, and V.35-compliant operation from a +5V single supply. A no-cable mode is entered when all mode pins (M0, M1, and M2) are pulled high or left unconnected. In no-cable mode, supply current decreases to 0.5µA and all transmitter and receiver outputs are disabled (high impedance). Short-circuit current limiting and thermal shutdown circuitry protect the drivers against excessive power dissipation.
The MXL1543B is a three‑driver/three‑receiver multiprotocol transceiver that operates from a single +5 V supply. It provides software‑selectable clock and data transceivers and can be terminated with a selectable resistor network or in a no‑cable mode.
The device supports a wide range of serial communication standards, offers a 28‑pin SSOP package, and operates from 0 °C to +70 °C. Detailed electrical characteristics, timing diagrams, and pin configurations are provided for designers.
| Supply Voltage (VCC) Range | 4.75 V – 5.25 V |
|---|---|
| Package Type | 28‑Pin SSOP |
It operates from a single +5 V supply with a VCC range of 4.75 V to 5.25 V.
It is supplied in a 28‑pin SSOP package.