MAX3172CAI+T

Overview

The MAX3172CAI+T is a +3.3V multiprotocol cable terminator and transceiver in a 28-pin SSOP package, operating from 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). The device includes a 1Tx/1Rx transceiver for handshake signals, powered by external charge pump supplies (V+, V-). Key electrical parameters include a supply current of 400µA to 750µA, data rates up to 64kbps for the receiver, and transmitter output fault protection to ±15V.

Feature Summary

• Software-selectable multiprotocol cable termination networks replacing discrete resistors and relays
• Integrated 1Tx/1Rx multiprotocol transceiver with fail-safe logic HIGH receiver outputs
• Certified TBR-1 and TBR-2 compliance for specific termination networks
• Transmitter output fault protected to ±15V to tolerate cable miswiring

Applications

• Data Networking PCI Cards
• CSU and DSU Telecommunications
• Data Routers

Procurement Notes

Verify the ordering suffix '+T' indicates tape-and-reel packaging when sourcing components. Confirm that the 'C' designation corresponds to the commercial temperature range of 0°C to +70°C. Ensure compatibility with the required V+ and V- supply levels generated by the paired MAX3171/MAX3173 charge pumps for proper transceiver operation.

Selection Notes

Select the MAX3172 over the MAX3174 if receiver input deglitching is required for unterminated or noisy serial handshake signal lines. Both devices share identical termination network capabilities and pinouts. Verify that the application requires the specific 28-pin SSOP form factor and +3.3V logic-compatible I/O levels.

Part Context

This component belongs to the MAX317x chipset family designed for complete +3.3V DTE/DCE interface ports. It functions alongside the MAX3170 clock/data transceiver and the MAX3171/MAX3173 control transceivers to support multiple serial standards including RS-422, RS-232, and X.21 without manual hardware reconfiguration.

Replacement Considerations

Public confirmed substitute part numbers: MAX3174CAI+T.