Sink Drivers. A6821 Datasheet

A6821 Drivers. Datasheet pdf. Equivalent

Part A6821
Description DABiC-5 8-Bit Serial Input Latched Sink Drivers
Feature www.DataSheet4U.com Data Sheet 26185.112B A6821 DABiC-5 8-Bit Serial Input Latched Sink Drivers A .
Manufacture Allegro MicroSystems
Datasheet
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A6821
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A6821
DABiC-5 8-Bit Serial Input Latched Sink Drivers
Package A
16-pin DIP
Package LW
16-pin Wide Body SOIC
A merged combination of bipolar and MOS technology gives these
devices an interface exibility beyond the reach of standard logic
buffers and power driver arrays. Typical applications include driving
multiplexed LED displays or incandescent lamps.
The A6821 has an eight-bit CMOS shift register and CMOS control
circuitry, eight CMOS data latches, and eight bipolar current-sinking
Darlington output drivers.
The CMOS inputs are compatible with standard CMOS logic levels.
TTL circuits may require the use of appropriate pull-up resistors. By
using the serial data output, the drivers can be cascaded for interface
applications requiring additional drive lines.
The A6821SA is furnished in a standard 16-pin plastic DIP. The
A6821EA is a 16-pin plastic DIP, capable of operation from -40°C to
+85°C. The A6821SLW is a 16-lead wide-body SOIC, for surface-
mount applications. These devices are lead (Pb) free, with 100% matte
tin plated leadframes.
ABSOLUTE MAXIMUM RATINGS
Output Voltage, VOUT .........................................50 V
Logic Supply Voltage, VDD...................................7 V
Input Voltage Range, VIN ..............–0.3 V toVDD+0.3 V
Continuous Output Current (each output), IOUT ... 500 mA
Package Power Dissipation, PD
A6821SA/A6821EA..................................2.1 W
A6821SLW............................................... 1.5 W
Operating Temperature Range
Ambient Temperature, TA ............–20°C to +85°C
Storage Temperature, TS ..........–55°C to +150°C
Caution: CMOS devices have input-static protection,
but are susceptible to damage when exposed to
extremely high static-electrical charges.
FEATURES
„ 3.3 V to 5 V logic supply range
„ Power on reset (POR)
„ To 10 MHz data input rate
„ CMOS, TTL compatible
„ –40°C operation available
„ Schmitt trigger inputs for improved
noise immunity
„ Low-power CMOS logic and latches
„ High-voltage current-sink outputs
„ Internal pull-up/pull down resistors
APPLICATIONS
„ Multiplexed LED displays
„ Incandescent lamps
Use the following complete part numbers when ordering:
Part Number
A6821SA-T
A6821EA-T
A6821SLW-T
Package
16-pin DIP
16-pin DIP
16-pin wide body SOIC
Ambient
–20ºC to +85ºC
–40ºC to +85ºC
–20ºC to +85ºC



A6821
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A6821
DABiC-5 8-Bit Serial Input Latched Sink Drivers
Functional Block Diagram
CLOCK
S E R IAL
DATA IN
L O G IC
GR OUND
S E R IAL-P AR ALLE L S HIFT R E G IS TE R
LATCHE S
L O G IC
V DD S UP P LY
S E R IAL
DATA OUT
S TR OBE
MOS
B IP O LAR
S UB
OUTPUT E NABLE
(AC TIVE LOW)
P OWE R
GR OUND
OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8
Typical Input Circuits
VDD
STROBE
OUTPUT
ENABLE
CLOCK
SERIAL
DATA IN
VDD
Typical Output Driver
OUT
7.2 kΩ
3 kΩ
SUB
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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