|Category||Interface and Interconnect|
|Company||Allegro Micro Systems, Inc.|
|Datasheet||Download A6811 datasheet
|OUT 11 OUT 12 BLANKING SERIAL DATA OUT SERIAL DATA IN LOGIC SUPPLY CLOCK STROBE OUT 1 OUT
The A6811 devices combine a 12-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 A6811 features an increased data input rate (compared with the older UCN/UCQ5811A) and a controlled output slew rate. The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With 5 V logic supply, typical serial-data input rates are to 33 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), A6812 (20 bits), and A6818 (32 bits). The A6811 output source drivers are npn Darlingtons, capable of sourcing 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-digit blanking, all output drivers can be disabled and all sink drivers turned on with a BLANKING input high. The pnp active pull-downs will sink at least 2.5 mA. Two temperature ranges are available for optimum performance in commercial (suffix S-) or industrial (suffix E-) applications. Package styles are provided for through-hole DIP (suffix -A) and surface-mount SOIC or PLCC (suffix -LW or -EP). Copper lead frames, low logicpower dissipation, and low output-saturation voltages allow all devices to source 25 mA from all outputs continuously to 83°C.
Logic Supply Voltage, VDD................... 7.0 V Driver Supply Voltage, VBB................... 60 V Continuous Output Current Range, IOUT......................... +15 mA Input Voltage Range, VIN....................... V to VDD 0.3 V Package Power Dissipation, PD........................................ See Graph Operating Temperature Range, TA (Suffix `E').................. to +85°C (Suffix `S').................. to +85°C Storage Temperature Range, TS............................... to +125°CFEATURES
s Controlled Output Slew Rate s High-Speed Data Storage 60 V Minimum Output Breakdown s High Data Input Rate s PNP Active Pull-Downs s Low Output-Saturation VoltagesLow-Power CMOS Logic and Latches Improved Replacements for SN75512B, UCN5811, and UCQ5811
Caution: These CMOS devices have input static protection (Class 2) but are still susceptible to damage if exposed to extremely high static electrical charges.
Complete part number includes a suffix to identify operating temperature range (E- or S-) and package type (-A, -EP, or -LW). Always order by complete part number, e.g., A6811SLW.SERIAL DATA OUT SERIAL DATA IN LOGIC SUPPLY CLOCK STROBE
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc.CLOCK SERIAL DATA IN STROBE V DD LOGIC SUPPLY SERIAL DATA OUT
Serial Shift Register Contents Data Clock Input RN X Serial Data Strobe Output Input P3... X
L = Low Logic Level H = High Logic Level X = Irrelevant
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