GENERAL DESCRIPTION

The MSC1215-xx is a 1/2-duty vacuum fluorescent display tube driver implemented in BiCMOS technology. This LSI consists of a 37-bit shift register, 34 latches, an analog dimming circuit, (a PWM conversion circuit), a 3·4 keyscan circuit, a 6ch-6-bit A/D converter and 17 segment drivers, and 2-grid pre-drivers.

FEATURES

• Power supply voltage : VDD=8 to 18 V

• Operating temperature range : Ta=–40 to +85°C)

• 17-segment driver outputs (IOH=–5mA at VOH=VDD–0.8 V)

• Built-in analog dimming circuit (6-bit resolution, user-programmable)

• Built-in PWM conversion circuit (Lamp PWM signal to vacuum fluorescent display PWM signal)

• Built-in automatic-selection circuit for analog dimming/PWM conversion function

• Built-in 6ch 6-bit A/D converter

• Built-in 3 · 4 Keyscan circuit

• Built-in oscillation circuit (external R and C, fOSC=3.3 MHz)

• Built-in Power-On-Reset circuit

• Package:

42-pin plastic DIP (DIP 42-P-600-2.54) (Product name: MSM1215-xxRS)

xx indicates the code number.