精品国产99久久久久久www_亚洲精彩视频在线观看的_性欧美婬妇ⅹxxx视频_里番肉工口全彩老师_a天堂最新在线观看_精品国产在天天在线观看_免费看那种视频_樱桃电视剧全集播放_成人性视频免费看的鲁片_中国伦理影院

General Description

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.

Features

? +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

??

Applications

?? PDAs and Palmtop Computers

?? Handy Terminals

?? GPS Receivers

?? Hand-Held Medical Equipment

?? Industrial Test Equipment