MSC1209

E2C0020-29-53 ¡ Semiconductor MSC1209 ¡ Semiconductor This version: May 1999 MSC1209 Previous version: Nov. 1997 www.DataSheet4U.com 42-Bit Vacuum Fluorescent Display Tube Driver with Digital Dimming Function GENERAL DESCRIPTION The MSC1209 is a Bi-CMOS display driver for a 1/2-duty vacuum fluorescent display tube. The MSC1209 consists of an 84-bit shift register, an 84-bit latch circuit, a 10-bit digital dimming circuit, 42-bit segment drivers, a 2-bit grid circuit, and a cascade control circuit. The MSC1209 is interfaced with a microcontroller by using three signal lines of LOAD, CLOCK, and DATA. The cascaded MSC1209 ICs can share LOAD, CLOCK, and DATA. FEATURES Power supply voltage: 8V to 18V (Built-in 5V regulator for logic) Operating temperature range: –40 to +105°C Driving 42 segments directly: VOH=VDD–0.5V at IOH=–3.0mA (VDD=15.0V) Built-in digital dimming circuit 10-bit resolution Programmable in the duty range of 0/2048 (0%) to 1016.5/2048 (49.6%) 3 interfaces with microcontroller: LOAD, CLOCK, DATA Cascade connection available (The cascaded MSC1209 ICs can share LOAD, CLOCK, and DATA.) Built-in oscillation circuit with an external capacitor (a single pin is used) Built-in power-on reset circuit Package: 56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name: MSC1209GS-2K) 1/15 ¡ Semiconductor MSC1209 www.DataSheet4U.com BLOCK DIAGRAM GRID1 GRID2 SEG1 SEG42 2-bit Grid Driver VDD VSS Voltage Regulator 5V 5V POR 42-bit Segment Driver V...