MAX3174CAI

Overview

The MAX3174CAI is a +3.3V multiprotocol cable terminator and transceiver housed in a 28-pin SSOP package, operating within a commercial temperature range of 0°C to +70°C. It integrates five software-selectable termination networks supporting V.11 (100Ω differential), V.35 (T-network), and V.28/V.10 (high-Z) configurations. The device includes a single full-duplex transceiver for handshake signals, capable of data rates up to 240kbps in V.28 mode or 64kbps in V.10 mode. Supply voltage ranges from 3.135V to 3.465V with typical supply current between 80µA and 750µA depending on the active mode.

Feature Summary

• Software-selectable multiprotocol cable termination networks replacing discrete resistor arrays and relays
• Integrated 1Tx/1Rx multiprotocol transceiver designed for serial handshake signal I/O
• Supports DTE/DCE interface modes via logic control inputs
• Transmitter output fault protection tolerates cable miswiring up to ±15V

Applications

• Data networking PCI cards
• CSU and DSU telecommunications equipment
• Data routers

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status as indicated by the suffix designation. Ensure the specific ordering code matches the required temperature grade and packaging format before finalizing procurement documentation.

Selection Notes

Select the MAX3174CAI when glitch rejection on handshake signals is unnecessary, distinguishing it from the MAX3172 variant which includes 10µs deglitching. This component pairs with charge pump devices like the MAX3171/MAX3173 to generate necessary V+ and V- supply rails for the integrated transceiver operation.

Part Context

Part of the MAX317x chipset family alongside the MAX3170, MAX3171, MAX3172, and MAX3173. Together these components form a complete +3.3V software-selectable DTE or DCE interface port supporting multiple serial standards including RS-232, RS-422, and X.21.

Replacement Considerations

Public confirmed substitute part numbers include MAX3172CAI+.

FAQ

How does the MAX3174 differ from the MAX3172 regarding receiver input processing?

The MAX3174 lacks the 10µs receiver input deglitching feature found in the MAX3172, allowing it to operate at higher frequencies up to 240kbps in V.28 mode.

What is the function of the V+ and V- pins on the MAX3174CAI?

These pins connect to the positive and negative supply outputs generated by an external charge pump, such as the MAX3171 or MAX3173, to power the internal transceiver.

Which protocols are supported by the termination networks?

The termination networks support V.11 (RS-422, RS-530, RS-530A, RS-449, V.36, X.21), V.35, and V.28 (RS-232)/V.10 (RS-423).