Datenblatt-Suchmaschine für elektronische Bauteile |
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MAX3325 Datenblatt(PDF) 1 Page - Maxim Integrated Products |
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MAX3325 Datenblatt(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. General Description The MAX3325 integrates a two-transmitter, two-receiver RS-232 transceiver with an LCD supply plus tempera- ture-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 supply- ing 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, tai- loring power consumption for battery-powered equip- ment. The MAX3325 is available in 28-pin SSOP and narrow DIP packages. Applications PDAs and Palmtop Computers Handy Terminals GPS Receivers Hand-Held Medical Equipment Industrial Test Equipment Features o +3.0V to +3.6V Single-Supply Operation o Provides 5.0V Regulated Output at 11mA in 3V Systems o 6-Bit DAC with Up/Down Interface for LCD Contrast Adjustment o Selectable Positive or Negative LCD Bias o Meets EIA-232E Specifications at 250kbps— Guaranteed o 1µA Shutdown Mode o Uses Small 0.22µF Capacitors—No Inductors Required o Temperature Sensor for LCD Contrast Compensation o Simple, Flexible Design Procedure for a Broad Range of LCD Displays 3V Dual RS-232 Transceiver with LCD Supply and Contrast Controller ________________________________________________________________ Maxim Integrated Products 1 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C1+ V+ VDD GND C1- REG UP T1OUT T2OUT T1IN T2IN SD232 SDLCD DOWN DAC REF+ FB REF- TEMP LCD VL R2OUT R1OUT R1IN R2IN V- C2- C2+ SSOP/DIP TOP VIEW MAX3325 19-1573; Rev 0; 10/99 Typical Operating Circuit appears at end of data sheet. Pin Configuration Ordering Information PART MAX3325CAI MAX3325CNI MAX3325EAI -40°C to +85°C 0°C to +70°C 0°C to +70°C TEMP. RANGE PIN-PACKAGE 28 SSOP 28 Narrow Plastic DIP 28 SSOP MAX3325ENI -40°C to +85°C 28 Narrow Plastic DIP |
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Ähnliche Beschreibung - MAX3325 |
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