¡ Semiconductor

MSC1201-xx

1/20

¡ Semiconductor

MSC1201-xx

60-Bit VFD Tube Driver with Digital Dimming and PWM Conversion Function

GENERAL DESCRIPTION

The MSC1201-xx is a 1/2 duty vacuum fluorescent display tube driver implemented in Bi-CMOS

technology. This LSI consists of 64-bit shift registers, 64 latches, PWM conversion circuit, a digital

dimming circuit, 30-segment driver and 2-grid driver. As the MSC1201-xx has both a digital

dimming circuit and a PWM conversion circuit which converts PWM signal for lamp dimming

control to PWM signal for VFD tube dimming control, the dimming control can be realized

without any external circuit.

The interface with a MCU can be done only with 3 wires (CS, DATA and CLOCK signals). Also,

DATA and CLOCK signal lines can be shared with other peripherals because of chip select

function by CS signal.

For the general purpose code, the code number is -01. (Product name: MSC1201-01GS-2K)

For a custom code, the code number will be ordered at any time.

FEATURES

• Operating temperature range : Ta = –40

°C to +85°C

• Built-in digital dimming circuit (11-bit resolution)

• Built-in Power-On-Reset circuit.

• Lamp PWM signal Æ Buil-in PWM conversion circuit for vacuum fluorescent display tube.

• Built-in RC Oscillation (external R and C)

• Correspondence between shift register and output segment is settable optionally using built

in mask programmable 30 ¥ 30 PLA.

• Package :

44-pin plastic QFP (QFP44–P–910-0.80–2K)(Product name: MSC1201-xxGS-2K)

xx indicates the code number

E2C0017-27-Y2

This version: Nov. 1997

Previous version: Jul. 1996