MAX3388ECUG

Overview

The MAX3388ECUG+ is a 2.5V-powered RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 24-pin TSSOP package. It operates within a temperature range of 0°C to +70°C and supports data rates up to 460kbps. The device integrates three transmitters and two receivers with ±15kV ESD protection on all RS-232 I/O pins. It features a dedicated VL pin for mixed-voltage logic compatibility (1.8V to 3.0V), a low-power shutdown mode drawing 1µA, and an internal 62Ω power switch. Supply current is typically 300µA.

Feature Summary

• Integrated dual charge pump enables RS-232 compatible performance from a single +2.35V to +3.0V supply using only four small capacitors.
• Dedicated VL pin allows flexible interoperation in mixed-logic voltage systems by programming both input and output logic levels.
• Includes additional logic-level I/O pins specifically designed for hot-sync applications and device-to-device handshaking.
• Provides robust ±15kV ESD protection on all RS-232 inputs, outputs, LIN, and SWIN terminals.

Applications

• Subnotebook and palmtop computers
• PDAs and PDA cradles
• Cell phone data cables
• Battery-powered equipment

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C) rather than the extended range variant. Confirm the package type matches the required 24-pin TSSOP footprint. Ensure the design accounts for the necessary external 0.1µF capacitors for the internal charge pump operation. Check for RoHS compliance status if required by local regulations.

Selection Notes

Select this component when a single 2.5V supply is available and mixed-voltage logic interfacing is required. The integrated power switch and extra transmitter make it suitable for cradle applications needing ring indicator signals. Consider the MAX3389E variant if the logic-level I/O must remain active during shutdown mode. Verify that the 460kbps data rate meets the system communication requirements.

Part Context

This part belongs to the MAX3388E/MAX3389E family of low-power RS-232 transceivers designed for portable electronics. The 'C' suffix denotes the commercial operating temperature range, while the 'E' suffix would indicate an extended range (-40°C to +85°C). The device is optimized for space-constrained designs in handheld devices and battery-powered peripherals.

Replacement Considerations

The MAX3389ECUG is a functional substitute within the same family, differing primarily in the behavior of the logic-level I/O during shutdown. The MAX3388EEUG serves as the extended temperature version of this exact component. No other direct cross-model replacements are documented in the provided source material.