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6812 Datasheet(PDF) 1 Page - Allegro MicroSystems

Part No. 6812
Description  DABiC-IV, 20-BIT SERIAL-INPUT, LATCHED SOURCE DRIVER
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

6812 Datasheet(HTML) 1 Page - Allegro MicroSystems

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LOAD
SUPPLY
BB
V
OUT 2
OUT7
OUT8
Dwg. PP-029-7
OUT19
OUT18
OUT13
12
13
14
27
28
17
18
SERIAL
DATA OUT
BLANKING
LOGIC
SUPPLY
STROBE
GROUND
CLOCK
CLK
ST
BLNK
OUT9
OUT 10
OUT12
OUT11
11
2
326
27
28
SERIAL
DATA IN
OUT 6
OUT 1
OUT 4
OUT 3
OUT20
1
15
16
OUT5
OUT 17
OUT 16
OUT15
OUT14
DD
V
DABiC-IV, 20-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVER
A6812xA
ABSOLUTE MAXIMUM RATINGS
at TA = 25
°C
Logic Supply Voltage, VDD ................... 7.0 V
Driver Supply Voltage, VBB ................... 60 V
Continuous Output Current Range,
IOUT ......................... -40 mA to +15 mA
Input Voltage Range,
VIN ....................... -0.3 V to VDD + 0.3 V
Package Power Dissipation,
PD ........................................ See Graph
Operating Temperature Range, TA
(Suffix ‘E–’) .................. -40
°C to +85°C
(Suffix ‘S–’) .................. -20
°C to +85°C
Storage Temperature Range,
TS ............................... -55
°C to +125°C
Caution: These CMOS devices have input static
protection (Class 2) but are still susceptible to
damage if exposed to extremely high static
electrical charges.
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 (com-
pared 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 applica-
tions 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 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 BLANK-
ING 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), surface-mount
SOIC (suffix -LW), or minimum-area surface-mount PLCC (suffix
-EP). Copper lead frames, low logic-power dissipation, and low
output-saturation voltages allow these drivers to source 25 mA from all
outputs continuously to more than +43
°C (suffix -LW), +61°C (suffix
-EP), or +77
°C (suffix -A).
FEATURES
I Controlled Output Slew Rate
I High-Speed Data Storage
I 60 V Minimum
Output Breakdown
I High Data Input Rate
I PNP Active Pull-Downs
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., A6812SLW .
6812
I Low Output-Saturation Voltages
I Low-Power CMOS Logic
and Latches
I Improved Replacements
for TL5812–, UCN5812–,
and UCQ5812–


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