M5481

M5481 LED DISPLAY DRIVER FEATURES s s s s s s s s s s s s 2 DIGIT LED DRIVER (14 segments) CURRENT GENERATOR OUTPUTS registor required) CONTINUOU BRIGHTNESS CONTROL SERIAL DATA INPUT DATA ENABLE WIDE SUPPLY VOLTAGE OPERATION TLL COMPATIBILITY APPLICATION EXAMPLES MICROPROCESSOR DISPLAYS INDUSTRIAL CONTROL INDICATOR RELAY DRIVER INSTRUMENTATION READOUTS (no DIP20 (Plastic package) ORDER CODE: M5481 B7 DESCRIPTION The M5481 is a monolithic MOS integrated circuit produced with a N-channel silicon gate technology. It uses the M5450 die packaged in a 20-pin plastic package copper frame, making it ideal for a 1-digit display. A single pin controls the LED display brightness by setting a reference current through a variable resistor connected either to VDD or to a separate supply of 13.2V maximum. The M5481 is a pin-to-pin replacement of the NS MM 5481. PIN CONNECTIONS Output Bit 8 Output Bit 7 Output Bit 6 Output Bit 5 Output Bit 4 Output Bit 3 Output Bit 2 Output Bit 1 Brightness Control VDD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Output Bit 9 Output Bit 9 Output Bit 9 Output Bit 9 Output Bit 9 VSS Output Bit 9 Data Enable Data In Clock Version 4.1 April 2000 1/8 1 M5481 1 - BLOC DIAGRAM Figure 1. VDD Brightness Control 100kΩ Output Bit 14 Output Bit 1 10 14 8 9 1nF 35 Output Buffers 35 Latches Data Enable Serial Data Load 13 12 35-Bit Shift Register Clock 11 15 Reset 2 - ABSOLUTE MAXIMUM RATINGS Symbol VDD Vi Vo(off) Io Ptot Tj Toper Tstg Junct...