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Related Links:

Datasheets:
A6812: DABiC-IV 20-Bit Serial-Input Latched Source Drivers with Active Pull-Downs (PDF)

Selection Guides:
Power Integrated Circuits,

Automotive ICs,

Vacuum-Fluorescent Display Drivers

when this product is updated

Technical Publications:
Product Replacement for the 58xx Family of Serial-Input, Latched Source Drivers

Press Releases:
Serial-Input, Latched Source Drivers with Slew-Rate Limiting

A6812
DABiC-IV 20-Bit Serial-Input Latched Source Drivers with Active Pull-Downs

Features

• Controlled Output Slew Rate
• High-Speed Data Storage
• 60 V Minimum Output Breakdown
• High Data Input Rate
• PNP Active Pull-Downs
• Low Output-Saturation Voltages
• Low-Power CMOS Logic and Latches
• Improved Replacements for TL5812-, UCN5812-, and UCQ5812-

Description

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, 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), 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 electro magnetic noise, which is an important consideration in systems that include telecommunications and/or microprocessors and to meet government emissions regulations. For inter-digit blanking, all output drivers can be disabled and all sink drivers turned on with a input high. The pnp active pull-downs will sink at least 2.5 mA.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A6812SA	28-pin DIP	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SEP	28-lead PLCC	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SEP-T	28-lead PLCC	Yes	view data	-20 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SEPTR	28-lead PLCC	No	view data	-20 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SEPTR-T	28-lead PLCC	Yes	view data	-20 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SLW	28-lead SOIC	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SLW-T	28-lead SOIC	Yes	view data	-20 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SLWTR	28-lead SOIC	No	view data	-20 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812SLWTR-T	28-lead SOIC	Yes	view data	-20 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812EA	28-pin DIP	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812EEP	28-lead PLCC	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812EEP-T	28-lead PLCC	Yes	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812EEPTR	28-lead PLCC	No	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812EEPTR-T	28-lead PLCC	Yes	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812ELW	28-lead SOIC	No	view data	-40 °C to  85 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812ELW-T	28-lead SOIC	Yes	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812ELWTR	28-lead SOIC	No	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812ELWTR-T	28-lead SOIC	Yes	view data	-40 °C to  85 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KA	28-pin DIP	--	--	-40 °C to  125 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KEP	28-lead PLCC	No	view data	-40 °C to  125 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KEP-T	28-lead PLCC	--	--	-40 °C to  125 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KEPTR	28-lead PLCC	No	view data	-40 °C to  125 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KEPTR-T	28-lead PLCC	--	--	-40 °C to  125 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KLW	28-lead SOIC	No	view data	-40 °C to  125 °C	discontinued	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KLW-T	28-lead SOIC	Yes	view data	-40 °C to  125 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KLWTR	28-lead SOIC	No	view data	-40 °C to  125 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A6812KLWTR-T	28-lead SOIC	Yes	view data	-40 °C to  125 °C		Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.