A6812 Allegro MicroSystems, A6812 Datasheet

A6812

Manufacturer Part Number

A6812

Description

DABiC-IV/ 20-BIT SERIAL-INPUT/ LATCHED SOURCE DRIVER

Manufacturer

Allegro MicroSystems

Datasheet

1.A6812.pdf (10 pages)

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Download datasheet (179Kb)

Logic Supply Voltage, V

Driver Supply Voltage, V

Continuous Output Current Range,

Input Voltage Range,

Package Power Dissipation,

Operating Temperature Range, T

Storage Temperature Range,

Caution: These CMOS devices have input static

protection (Class 2) but are still susceptible to

damage if exposed to extremely high static

electrical charges.

DATA OUT

BLANKING

GROUND

SUPPLY

SERIAL

OUT

LOAD

(Suffix ‘E–’) .................. -40

(Suffix ‘S–’) .................. -20

OUT

........................................ See Graph

............................... -55

....................... -0.3 V to V

......................... -40 mA to +15 mA

BLNK

................... 7.0 V

................... 60 V

C to +125

CLK

C to +85

+ 0.3 V

Dwg. PP-029-7

STROBE

LOGIC

SUPPLY

SERIAL

DATA IN

OUT

CLOCK

OUT

6812

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.

microprocessor-based systems. With a 3.3 V or 5 V logic supply, they

will operate to at least 10 MHz.

tions requiring additional drive lines. Similar devices are available as

the A6809– and A6810– (10 bits), A6811– (12 bits), and A6818– (32

bits).

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.

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).

I Controlled Output Slew Rate

I High-Speed Data Storage

I 60 V Minimum

I High Data Input Rate

I PNP Active Pull-Downs

temperature range (E- or S-) and package type (-A, -EP, or -LW).

Always order by complete part number, e.g., A6812SLW .

Output Breakdown

The A6812– devices combine a 20-bit CMOS shift register,

The CMOS shift register and latches allow direct interfacing with

A CMOS serial data output permits cascade connections in applica-

The A6812– output source drivers are npn Darlingtons, capable of

Two temperature ranges are available for optimum performance in

Complete part number includes a suffix to identify operating

DABiC-IV, 20-BIT SERIAL-INPUT,

LATCHED SOURCE DRIVER

I Low Output-Saturation Voltages

I Low-Power CMOS Logic

I Improved Replacements

and Latches

for TL5812–, UCN5812–,

and UCQ5812–

Related parts for A6812

A6812 Summary of contents

Page 1

... A6809– and A6810– (10 bits), A6811– (12 bits), and A6818– (32 OUT 7 bits). OUT 8 The A6812– output source drivers are npn Darlingtons, capable of OUT 9 sourcing mA. The controlled output slew rate reduces electro- magnetic noise, which is an important consideration in systems that OUT ...

Page 2

... OUT 20 OUT 19 OUT 8 OUT OUT BLANKING Dwg. PP-059-1 GROUND V DD 2.5 2.0 1.5 1 0.5 OUT 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc ...

Page 3

CLOCK SERIAL DATA IN STROBE BLANKING GROUND OUT Serial Shift Register Contents Data Clock Input Input ... N ... N ... R ...

Page 4

SERIAL-INPUT, LATCHED SOURCE DRIVER Characteristic Symbol Output Leakage Current I CEX Output Voltage V OUT(1) V OUT(0) Output Pull-Down Current I OUT(0) Input Voltage V IN(1) V IN(0) Input Current I IN(1) I IN(0) Input Clamp Voltage V ...

Page 5

CLOCK SERIAL DATA IN SERIAL DATA OUT STROBE BLANKING OUT BLANKING A. Data Active Time Before Clock Pulse (Data Set-Up Time), t ...................................... 25 ns su(D) B. Data Active Time After Clock Pulse (Data Hold Time), t ............................................ 25 ns ...

Page 6

SERIAL-INPUT, LATCHED SOURCE DRIVER 28 0.580 0.485 1 0.250 MAX 0.015 MIN 28 14.73 12.32 1 6.35 MAX 0.39 MIN NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is ...

Page 7

NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative. 3. Supplied in standard sticks/tubes of 38 devices or add “TR” to part ...

Page 8

SERIAL-INPUT, LATCHED SOURCE DRIVER 28 0.2992 0.2914 0.020 1 0.013 0.0926 0.1043 0.0040 28 7.60 7.40 0.51 1 0.33 2.65 2.35 0.10 NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing ...

Page 9

... LATCHED SOURCE DRIVER The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current ...

Page 10

SERIAL-INPUT, LATCHED SOURCE DRIVER * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits. Negative current is defined as coming out of (sourcing) the output. † Complete part number includes additional ...

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