6812

Data Sheet 26182.126A 6812 A6812xA LOAD SUPPLY SERIAL DATA OUT OUT 20 OUT 19 OUT 18 OUT 17 OUT 16 OUT 15 OUT 14 OUT 13 OUT 12 OUT 11 BLANKING GROUND 1 2 3 4 5 6 VBB VDD 28 27 26 25 24 23 LOGIC SUPPLY SERIAL DATA IN OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 OUT 9 OUT 10 STROBE CLOCK DABiC-IV, 20-BIT SERIAL-INPUT, LATCHED SOURCE DRIVER The A6812– devices combine a 20-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 A6812– features an increased data input rate (compared with the older UCN/UCQ5812-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, they will operate to at least 10 MHz. A CMOS serial data output permits cascade connections in applications requiring additional drive lines. Similar devices are available as the A6809– and A6810– (10 bits), A6811– (12 bits), and A6818– (32 bits). The A6812– output source drivers are npn Darlingtons, capable of sourcing up to 40 mA. The controlled output slew rate reduces electromagnetic noise, which is an important consideration in systems that include telecommunications and/or microprocessors and to meet government emissions regulations. For inter-digi...