MAX3172CAI

Overview

The MAX3172CAI is a +3.3V multiprotocol cable terminator and transceiver housed in a 28-pin SSOP package, operating within a 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 with data rates up to 240kbps. Supply current ranges from 80µA to 750µA depending on mode. Logic inputs are compatible with 3V/5V levels, and transmitter outputs tolerate ±15V faults.

Feature Summary

• Software-selectable multiprotocol cable termination networks replace discrete resistor arrays and relays
• Integrated 1Tx/1Rx multiprotocol transceiver designed for serial handshake signal I/O
• Certified TBR-1 and TBR-2 compliant for specific termination networks
• 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 the component against official Analog Devices or Maxim Integrated datasheets to confirm pinout compatibility and electrical specifications. Ensure the supply voltage matches the required +3.3V nominal level. Check that the operating environment stays within the specified commercial temperature range. Confirm that the interface protocols match the supported standards listed in the documentation.

Selection Notes

Select the MAX3172CAI when receiver input deglitching is required for unterminated operation at lower speeds. Choose this variant over the MAX3174CAI if glitch rejection on serial handshake signals is necessary. Ensure the system design accommodates the 28-pin SSOP footprint. Verify that the application requires the specific termination impedances provided by the internal networks.

Part Context

The MAX3172CAI belongs to the MAX317x chipset family, which forms a complete +3.3V software-selectable DTE or DCE interface port. It is typically paired with the MAX3170 clock/data transceiver and the MAX3171/MAX3173 control transceivers. This combination supports multiple serial interfaces including RS-422, RS-232, and X.21 without external termination components.

Replacement Considerations

The MAX3174CAI serves as a parameter-equivalent alternative lacking the receiver input deglitching feature found in the MAX3172.