MAX3174CAI+

Overview

The MAX3174CAI+ is a +3.3V multiprotocol cable terminator and transceiver housed in a 28-pin SSOP package. It integrates five software-selectable termination networks supporting V.11 (RS-422/530), V.35, and V.28/V.10 protocols. The device includes a single transmitter and receiver for handshake signals, operating at data rates up to 240kbps. It requires external V+ and V- supplies generated by companion charge pumps. Operating temperature range is 0°C to +70°C.

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.
• Supports DTE/DCE interface configuration via logic inputs.
• Transmitter outputs are fault protected to ±15V to tolerate cable miswiring.

Applications

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

Procurement Notes

Verify the component status as obsolete or end-of-life through official manufacturer channels before finalizing design-in decisions. Confirm that the specific ordering suffix corresponds to the required RoHS compliance level and packaging format. Ensure compatibility with existing supply chain sources for legacy components.

Selection Notes

Select this component when a software-configurable solution for multiprotocol serial interfaces is required without using mechanical relays. It is specifically intended for use alongside the MAX3170 clock/data transceiver and MAX3171/MAX3173 control transceivers. Verify that the application does not require the 10µs receiver input deglitching feature, which is exclusive to the MAX3172 variant.

Part Context

This device belongs to the MAX317x family of +3.3V multiprotocol interface solutions. It functions as a complementary component to the MAX3170 and MAX3171/MAX3173 chips to form a complete serial port interface. The MAX3174 differs from the MAX3172 primarily by the absence of receiver glitch rejection circuitry, allowing for higher frequency operation on handshake lines.

Replacement Considerations

Public confirmed substitute part numbers include MAX3172CAI+.

FAQ

Does the MAX3174CAI+ include receiver input deglitching?

No, the MAX3174 does not feature receiver input deglitching. This functionality is available only in the MAX3172 variant.

What voltage levels are required for the V+ and V- pins?

The V+ and V- pins must be supplied by an external charge pump, typically provided by the MAX3171 or MAX3173, generating levels between approximately +4.2V to +6.5V and -3.8V to -6.5V depending on the protocol mode.

How is the termination network configured for V.35 mode?

In V.35 mode, all five termination networks are configured to provide a 100Ω differential impedance and a 150Ω common-mode impedance using an internal T-network structure.