MAX3319ECAE+T

Overview

The MAX3319ECAE+T is a single-channel RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +2.25V to +3.0V supply and features AutoShutdown Plus technology, achieving a typical supply current of 1µA in shutdown mode. The device supports data rates up to 460kbps with a guaranteed slew rate of 4V/µs. It utilizes a dual charge pump requiring only four 0.1µF capacitors for voltage generation. The component is housed in a 16-pin SSOP package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the RS-232 cable is disconnected or peripheral transmitters remain inactive for over 30 seconds.
• Proprietary low-dropout transmitter output stage enables RS-232-compatible performance using a dual-charge pump from a single low-voltage supply.
• Includes a logic-level READY output that asserts high when the internal charge pumps are regulating and the device is ready for transmission.

Applications

• Palmtop Computers
• Hand-Held Instruments
• GPS Systems

Procurement Notes

Verify the specific ordering suffix 'AE' corresponds to the 16-pin SSOP package and the '-E' designation confirms the industrial temperature range of -40°C to +85°C. Confirm RoHS compliance status (+T) matches project requirements. Ensure the source documentation explicitly identifies this part number as a single-driver/receiver configuration within the MAX3319 family.

Selection Notes

Select this component for applications requiring minimal external capacitance and ultra-low standby power in portable devices. It is suitable for systems where standard RS-232 voltage levels must be generated from a low-voltage rail without complex switching regulators. Verify that the 460kbps maximum data rate meets the communication speed requirements of the target interface.

Part Context

This component belongs to the MAX3316–MAX3319 family of 2.5V RS-232 transceivers. While the MAX3316 and MAX3317 feature two drivers and receivers, the MAX3319 specifically provides one driver and one receiver. This reduction in channel count allows for a smaller 16-pin footprint compared to the 20-pin packages used by the dual-channel variants.

Replacement Considerations

Public confirmed substitute part numbers: MAX3319CAE+T (Commercial Temperature Range).

FAQ

How does the AutoShutdown Plus feature function?

The device enters a low-power shutdown mode if FORCEOFF is high, FORCEON is low, and no valid signal transition is detected on any receiver or transmitter input for more than 30 seconds. It wakes up upon sensing a valid transition.

What is the purpose of the INVALID output pin?

The INVALID output is asserted low when no valid RS-232 voltage levels have been detected on all receiver inputs. It indicates the receiver's input condition and is independent of the FORCEON and FORCEOFF states.