MAX3325

PRODUCTION

3V, Dual RS-232 Transceiver with LCD Supply and Contrast Controller

+3V RS-232 Transceiver Provides Power/Bias to LCD Display

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $5.12

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Overview

+3.0V to +3.6V Single-Supply Operation
Provides 5.0V Regulated Output at 11mA in 3V Systems
6-Bit DAC with Up/Down Interface for LCD Contrast Adjustment
Selectable Positive or Negative LCD Bias
Meets EIA-232E Specifications at 250kbps-Guaranteed
1µA Shutdown Mode
Uses Small 0.22µF Capacitors-No Inductors Required
Temperature Sensor for LCD Contrast Compensation
Simple, Flexible Design Procedure for a Broad Range of LCD Displays

The MAX3325 integrates a two-transmitter, two-receiver RS-232 transceiver with an LCD supply plus temperature-compensated contrast control. It is intended for small 3V instruments requiring a 5V supply for either logic or an LCD display, an adjustable bias signal for contrast, LCD temperature compensation, and an RS-232 interface for serial communications.

The 5V supply is a regulated charge pump followed by a low-dropout (LDO) linear regulator capable of supplying 11mA for the 5V LCD power.

The MAX3325 has an internal 6-bit digital-to-analog converter (DAC) providing 64 contrast levels, plus an internal temperature sensor that compensates the LCD's contrast for changes in ambient temperature. The LCD contrast can be designed for any voltage range from -5V to +2V.

The MAX3325's 250kbps RS-232 transceiver meets all EIA-232E specifications with input voltages from +3.0V to +3.6V. Both the RS-232 section and the LCD supply circuitry can be independently placed in shutdown, tailoring power consumption for battery-powered equipment. The MAX3325 is available in 28-pin SSOP and narrow DIP packages.

Applications

GPS Receivers
Handheld Medical Equipment
Handy Terminals
Industrial Test Equipment
PDAs and Palmtop Computers

Part Models: 2
1ku List Price: Starting From $5.12

Documentation

Data Sheet 1

MAX3325: 3V, Dual RS-232 Transceiver with LCD Supply and Contrast Controller Data Sheet (Rev.0) 10/01/1999

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX3325EAI+	28-SSOP-5.3_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX3325EAI+T	28-SSOP-5.3_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 28, 2023 - 2361H WAFER FAB
		pcn_2361h
MAX3325EAI+	PRODUCTION
MAX3325EAI+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Interface Transceivers & Isolators 8
MAX3222	PRODUCTION	3.0V to 5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers
MAX3222E	PRODUCTION	±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers
MAX3224	PRODUCTION	1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
MAX3224E	PRODUCTION	±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus

MAX3225	PRODUCTION	1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
MAX3225E	RECOMMENDED FOR NEW DESIGNS	±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
MAX3232	PRODUCTION	3.0V to 5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers
MAX3232E	PRODUCTION	±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers

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Overview

Documentation

Data Sheet 1

Hardware Ecosystem

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