The MAX3170 is a three-driver/three-receiver multiprotocol transceiver that operates from a +3.3V single supply. The MAX3170, along with the MAX3171/MAX3173 and MAX3172/MAX3174, form a complete software-selectable data terminal equipment (DTE) or data communications equipment (DCE) interface port that supports the V.28 (RS-232), V.11 (RS-449/V.36, EIA530, EIA530-A, X.21), and V.35 protocols. The MAX3170 transceiver carries the high-speed clock and data sig- nals, while the MAX3171 or MAX3173 carries the con- trol signals. The MAX3170 can be terminated by the MAX3172 or MAX3174 software-selectable resistor ter- mination network or by a discrete termination network. An internal charge pump and proprietary low-dropout transmitter output stage allow V.11-, V.28-, and V.35- compliant operation from a +3.3V 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 1mA and all transmitter and receiver outputs are disabled (high impedance). Short-circuit limiting and thermal shut- down circuitry protect the drivers against excessive power dissipation.
The MAX3170 is a three‑driver/three‑receiver transceiver that operates from a +3.3 V single supply. It forms a complete software‑selectable DTE/DCE interface together with the MAX3171/3173 and MAX3172/3174 and supports V.28 (RS‑232), V.11 (RS‑449/V.36/EIA530/EIA530‑A/X.21) and V.35 protocols.
Key features include a no‑cable mode with 1 mA current draw, true fail‑safe receiver operation, thermal shutdown protection, and a small 28‑pin SSOP package. The datasheet provides absolute maximum ratings, detailed electrical characteristics, pin‑out tables, test circuits, and typical performance graphs.
| Supply Voltage | +3.3 V single supply |
|---|---|
| No‑cable mode current | 1 mA |
| Supported Protocols | V.28, V.11, V.35 |
| Operating Temperature Range | 0 °C to +70 °C |
| Maximum V+ / V‑ difference | 7 V each, 13 V difference |
| Data Rate (V.11/V.35) | 10 Mbps |
| Data Rate (V.28) | 240 kbps |
| Package | 28‑Pin SSOP, 5.3 mm × 6.5 mm |
| Input High Voltage (Vin) | 2.0 V |
| Input Low Voltage (VIL) | 0.8 V |
It operates from a +3.3 V single supply.
The device supports V.28 (RS‑232), V.11 (RS‑449/V.36/EIA530/EIA530‑A/X.21) and V.35.
In no‑cable mode the supply current drops to about 1 mA.
It is supplied in a 28‑pin SSOP package measuring roughly 5.3 mm × 6.5 mm.