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A6812: DABiC-IV 20-Bit Serial-Input Latched Source Drivers with Active Pull-Downs (PDF)
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A6812
DABiC-IV 20-Bit Serial-Input Latched Source Drivers with Active Pull-Downs
LAST TIME BUY. This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available.
Date of status change: May 3, 2010.
Deadline for receipt of LAST TIME BUY orders: October 29, 2010.
For existing customer transition, and for new customers or new applications, refer to your Allegro sales representative.
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
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A6812SEPTR | 28-lead PLCC | No | view data | -20 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812SEPTR-T | 28-lead PLCC | Yes | view data | -20 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812SLWTR-T | 28-lead SOIC | Yes | view data | -20 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812EEPTR | 28-lead PLCC | No | view data | -40 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812EEPTR-T | 28-lead PLCC | Yes | view data | -40 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812ELWTR-T | 28-lead SOIC | Yes | view data | -40 °C to 85 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
|
| A6812KLWTR-T | 28-lead SOIC | Yes | view data | -40 °C to 125 °C | last-time buy |
Contact Local Sales Representative or check distributor stock |
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.