MAX3172CAI+

Overview

The MAX3172CAI+ is a +3.3V multiprotocol cable terminator and transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin SSOP package with an operating 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) modes. 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 200µA (inactive) to 750µA (active), data rates up to 240kbps for V.28 and 64kbps for V.10, 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 for serial handshake signal I/O
• Certified TBR-1 and TBR-2 compliance for specific termination networks
• Receiver input deglitching capability for unterminated operation

Applications

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

Procurement Notes

Verify the component against official Maxim Integrated datasheets to confirm pinout compatibility and electrical specifications. Ensure that the required V+ and V- supply voltages are provided by compatible charge pumps such as the MAX3171 or MAX3173. Confirm that the system logic levels match the specified 3V/5V logic-compatible I/O requirements before integration.

Selection Notes

Select the MAX3172CAI+ when receiver input deglitching is required for noisy or unterminated systems. Choose the MAX3174 variant if higher data rates up to 240kbps are needed without glitch rejection. Ensure the application supports the necessary software mode-select inputs (M0, M1, M2, DCE/DTE) to configure the termination networks correctly.

Part Context

The MAX3172/MAX3174 series complements the MAX3170 clock/data transceiver and MAX3171/MAX3173 control transceivers to form a complete +3.3V software-selectable DTE or DCE interface port. This chipset architecture simplifies the design of multiprotocol serial interfaces by consolidating termination and handshake functions into integrated circuits.

Replacement Considerations

The MAX3174CAI+ serves as a direct functional substitute within the same package and family, differing primarily in the absence of receiver input deglitching circuitry.