MSC1205

E2C0018-27-Y3 ¡ Semiconductor MSC1205 ¡ Semiconductor This version: Nov. 1997 MSC1205 Previous version: Jul. 1996 www.DataSheet4U.com 32-Bit Duplex Controller/Driver with Digital Dimming Function GENERAL DESCRIPTION The MSC1205 is a Bi-CMOS display driver for a 1/2-duty vacuum fluorescent display tube. It consists of a 64-bit shift register, latch circuits, a digital diming circuit, and drivers. The MSC1205 provides an interface with a microcomputer only by three signal lines: LOAD, DATA, and CLOCK. FEATURES Power Supply Voltage: 8 to 18V (built-in 5V regulator for logic) Built-in 1-terminal RC oscillation circuit (with external capacitor) Built-in digital dimming circuit 10-bit resolution Programmable in the duty range of 0/2048 (0%) to 1015.5/2048 (49.6%). Can directly drive 32 ¥ 2 display anodes. Built-in power-on reset circuit Package options: 42-pin plastic DIP (DIP42-P-600-2.54) (Product name: MSC1205-RS) 44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name: MSC1205GS-2K) 1/15 ¡ Semiconductor MSC1205 www.DataSheet4U.com BLOCK DIAGRAM SEG32 SEG31 GRID1 GRID2 VOLTAGE REGULATOR SEG2 SEG1 VDD VSS DRIVER 8 to 18V 32 bits LEVEL SHIFTER 5V BLANK DOWN COUNTER 10 bits 32 bits TIMING GENERATOR BL MULTIPLEXER ST 5V R (fosc) bo COMPARATOR (bo) 10 bits LATCH OSC OSC (SEGLD) (DIMLD) L LOAD (POR) LOAD TIMING CONTROL LATCH Q1-Q10 Q1-Q64 64 bits 32 bits L L LATCH 32 bits DATA CLOCK D (2 bits) D Q1-Q64 (64 bits) TEST SHIFT REGISTER 2/15 ¡ Semicondu...