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The A6818– devices combine a 32-bit CMOS shift register, accompanying data latches and control circuitry with bipolar sourcing outputs and pnp active pull downs. Designed primarily to drive vacuum-fluorescent displays, the 60 V and - 40 mA output ratings also allow these devices to be used in many other peripheral power driver applications. The A6818– features an increased data input rate (compared with the older UCN/UCQ5818–F) and a controlled output slew rate.

The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 3.3 V or 5 V logic supply, typical serial-data input rates are up to 33 MHz.

A CMOS serial data output permits cascade connections in applications requiring additional drive lines. Similar devices are available as the A6810– (10 bits) and A6812– (20 bits).

FEATURES

■ Controlled Output Slew Rate

■ 60 V Minimum Output Breakdown

■ PNP Active Pull-Downs

■ Low-Power CMOS Logic and Latches

■ High-Speed Data Storage

■ High Data Input Rate

■ Low Output-Saturation Voltages

■ Improved Replacements for SN75518N, SN75518NF, UCN5818–, and UCQ5818–