MM145453 NSC | Alldatasheet

Document overview

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Technical content

Features

n Wide Power Supply operation n TTL Compatibility n Up to 33 LCD Segments n Alphanumeric or Bar Graph capability n Cascaded operation capability n Pin Compatible with MC145453

Applications

n COPS ™ or microprocessor displays n Industrial control indicator n Digital clock, thermometer, counter, voltmeter n Instrumentation displays n Remote displays Connection Diagram DS101283-1 Top View Order Number MM145453V See NS Package Number V44A December 1999 MM145453 Liquid Crystal Display Driver © 1999 National Semiconductor Corporation DS101283 www.national.com

Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Voltage at Any Pin, Referenced to Gnd -0.3V to +10V Storage Temperature -65˚C to +150˚C Power Dissipation at 25˚C 350mW Power Dissipation at 70˚C 300mW Junction Temperature +150˚C Lead Temperature (Soldering, 10s) 300˚C Recommended Operating Conditions VDD 3V to 10V Operating Temperature 0˚C to 70˚C

Electrical Characteristics

The following specifications apply for TA within operation range, VDD = 3.0V to 10V, VSS = 0V, unless otherwise specified. Parameter Conditions Min Typical Max Units Supply Voltage, VDD 31 0 V Average Supply Current, IDD All Outputs Open, Clock=Gnd, Data=Gnd,OSC=Gnd, BP_IN 32Hz VDD =5 V 1 0 µ A VDD = 10V 40 µA Input Logical ’0’ Voltage, VIL VDD = 3V 0.4 V VDD = 5V 0.8 V VDD = 10V 0.8 V Input Logical ’1’ Voltage, VIH VDD = 3V 2.0 V VDD = 5V 2.0 V VDD = 10V 8.0 V Segment Sink Current, IOL VDD = 3V, VOUT = 0.3V -20 -40 µA Segment Source Current, IOH VDD = 3V, VOUT = 2.7V 20 40 µA Backplane Out Sink Current, IOL VDD = 3V, VOUT = 0.3V -320 -500 µA Backplane Out Source Current, IOH VDD = 3V, VOUT = 2.7V 320 500 µA Segment Output Offset Voltage Segment Load = 250pF (Note 2) +/-50 mV Backplane Output Offset Voltage Backplane Load = 8750pF (Note 2) +/-50 mV Backplane Out Frequency R OSC_IN = 50kΩ ,C OSC_IN = 0.01µF 75 Hz Clock Input Frequency, fCLOCK VDD = 3V (Notes 2, 3) 500 kHz VDD = 5V (Note 2) 750 kHz VDD = 10V (Note 2) 1.0 MHz Clock Input Duty Cycle 40 60 % Data Input Set-Up Time, tDS 300 ns Data Input Hold Time, tDH 300 ns Note 1:“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation. Note 2:This parameter is guaranteed (but not production tested) over the operating temperature range and the operating supply voltage range. Not to be used in Q.A. testing. Note 3:AC input waveform for test purposes: tr≤ 20ns, tf≤ 20ns, fCLOCK = 500kHz, Duty Cycle = 50% ±10% Note 4:Clock input rise time (tr) and fall time (tf) must not exceed 300ns MM145453 www.national.com 2

Applications Information(Continued) The BP_IN pin of the MM145453 can be used with an exter- nally supplied signal, provided it has a duty cycle of 50% . Any deviation from a precise 50% duty cycle will result in an offset voltage on the LCD. The use of an external clock al- lows synchronizing the display drive with AC power, other in- ternal clocks, or DVM integration time to reduce interference from the display. When using an external clock for the back plane drive the internal oscillator should be disabled by con- necting the OSC_IN pin directly to ground. This will prevent possible internal oscillations, and reduce device dissipation. The MM145453 is a pin out variation of the MM5453. For ad- ditional applications information please refer to the MM5453 data sheet. Input Data Format DS101283-4 MM145453 www.national.com 4

Physical Dimensionsinches (millimeters) unless otherwise noted LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com Top View Order Number MM145453V See NS Package Number V44A MM145453 Liquid Crystal Display Driver National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.