A6276 데이터 시트보기 (PDF) - Allegro MicroSystems

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A6276

16-Bit Serial Input, Constant-Current Latched LED Driver

Allegro MicroSystems 

A6276

16-Bit Serial Input, Constant-Current

Latched LED Driver

Features and Benefits

▪ Up to 90 mA constant-current outputs

▪ Undervoltage lockout

▪ Low-power CMOS logic and latches

▪ High data input rate

▪ Functional replacement for TB62706BN/BF

Packages

24-pin DIP

(A package)

24-pin TSSOP

with exposed thermal pad

(LP package)

24-pin SOICW

(LW package)

Not to scale

Description

The A6276 is specifically designed for LED-display

applications. Each BiCMOS device includes a 16-bit CMOS

shift register, accompanying data latches, and 16 NPN constant-

current sink drivers. Except for package style and allowable

package power dissipation, the device options are identical.

The CMOS shift register and latches allow direct interfacing

with microprocessor-based systems. With a 5 V logic supply,

typical serial data-input rates are up to 20 MHz. The LED drive

current is determined by the user selection of a single resistor.

A CMOS serial data output permits cascaded connections in

applications requiring additional drive lines. For inter-digit

blanking, all output drivers can be disabled with an ENABLE

input high. Similar 8-bit devices are available as the A6275.

Three package styles are provided: through-hole DIP (suffix A),

surface-mount SOIC (suffix LW), and TSSOP with exposed

thermal pad (suffix LP). In normal applications, the copper

leadframe and low logic-power dissipation of the DIP allow it

to sink maximum rated current through all outputs continuously

over the operating temperature range (90 mA, 0.75 V drop,

85°C). All packages are lead (Pb) free, with 100% matte tin

leadframe plating.

Functional Block Diagram

26185.201H

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