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)