LAPIS Semiconductor

FEDL9271-01

Issue Date: Mar. 1, 2007

ML9271

48-Bit Grid/Anode VFD Driver

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GENERAL DESCRIPTION

The ML9271 is a monolithic IC designed for directly driving the anodes of the vacuum fluorescent display tube.

The circuit contains a 48-bit shift register circuit, 48-bit latch circuit, and 48 output circuits on a single chip.

Display data is serially stored in the shift register at the rising edge of CLOCK pulse.

Setting the CL pin high allows all the driver outputs to be driven low, which makes it possible to set the display

clear.

Setting the CHG pin high with the CL pin set low allows all the driver outputs to be driven high for testing.

FEATURES

: 3.3V

10% or 5.0 V10%

: 8 to 18 V

• Operating temperature range

: −40 to +105°C

• VFD driver outputs can be connected directly to the VFD tube. No pull-down resistor is required.

• VFD driver output current (HVO1 to HVO48)

: −6.0 mA

• Clock frequency

: 5.0MHz

• Package

: 64-pin plastic QFP (QFP64-P-1414-0.80-BK)

: Al-Pad Chip