MAX3318ECDBR

Overview

The MAX3318ECDBR is a dual-driver, dual-receiver RS-232-compatible transceiver manufactured by Texas Instruments. It operates from a single 2.25-V to 3-V supply and supports data rates up to 460 kbps. The device integrates a charge pump requiring only four 0.1-μF capacitors. It features ±15-kV ESD protection on RS-232 I/O pins using the IEC 61000-4-2 Air-Gap Discharge method. Supply current is reduced to 1 μA in standby mode via Auto-Power-Down Plus. It is housed in a 20-pin SSOP package.

Feature Summary

• Integrated ±15-kV ESD protection on RS-232 I/O pins
• Auto-Power-Down Plus feature reduces supply current to 1 μA
• Operates from a single 2.25-V to 3-V supply voltage
• Supports data rates up to 460 kbps

Applications

• Battery-powered systems
• PDAs
• Cellular phones
• Notebooks
• Hand-held equipment

Procurement Notes

Verify the exact ordering suffix against the latest TI Package Option Addendum to confirm the specific temperature grade and packaging configuration. Ensure that the selected variant matches the required operating temperature range for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when designing low-power serial communication interfaces for battery-operated devices. The integrated charge pump eliminates the need for external negative voltage generation. Verify that the system logic levels are compatible with the CMOS inputs and outputs provided by the transceiver.

Part Context

This part belongs to the MAX3318 family of RS-232 transceivers designed for low-voltage applications. The ECDBR designation indicates an extended industrial temperature range (-40°C to +85°C) and a 20-pin SSOP package. It serves as a bridge between microcontroller logic levels and standard RS-232 signaling requirements.

Replacement Considerations

MAX3318EIDBR

FAQ

How does the Auto-Power-Down Plus feature function?

The feature automatically powers down the built-in charge pump and drivers if no valid signal transitions are detected on any receiver or driver input for approximately 30 seconds, reducing supply current to 1 μA.

What is the ESD protection rating for the RS-232 I/O pins?

The device provides ±15-kV protection using the IEC 61000-4-2 Air-Gap Discharge method, ±8-kV protection using the Contact Discharge method, and ±15-kV protection using the Human-Body Model (HBM).

What capacitor values are required for the charge pump?

The charge pump requires four 0.1-μF capacitors connected to the C1+, C1-, C2+, and C2- terminals.