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A6277

Allegro
Part Number A6277
Manufacturer Allegro
Description 8-Bit Serial Input Constant-Current Latched LED Driver
Published Dec 6, 2023
Detailed Description A6277 8-Bit Serial Input Constant-Current Latched LED Driver Features and Benefits ▪ Up to 150 mA constant-current outp...
Datasheet PDF File A6277 PDF File

A6277
A6277


Overview
A6277 8-Bit Serial Input Constant-Current Latched LED Driver Features and Benefits ▪ Up to 150 mA constant-current outputs ▪ Undervoltage lockout ▪ Low-power CMOS logic and latches ▪ High data input rate ▪ Similar to Toshiba® TD62715FN ▪ High/low output current function ▪ Digital dimming control Package: 20-pin SOICW (suffix LW) Description The A6277 is specifically designed for LED display applications.
Each BiCMOS device includes an 8-bit CMOS shift register, accompanying data latches, and eight NPN constant-current sink drivers.
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 cascade connections in applications requiring additional drive lines.
For inter-digit blanking, all output drivers can be disabled with an ENABLE input high.
In addition, a HIGH/LOW function enables full selected current with the application of a logic low, or 50% selected current with the application of a logic high.
The surface-mount wide SOIC (LW) is lead (Pb) free, with 100% matte-tin leadframe plating.
Not to scale Functional Block Diagram 26185.
202G A6277 8-Bit Serial Input Constant-Current Latched LED Driver Selection Guide Part Number A6277ELWTR-T Packing 20-pin SOICW Package 1000 per reel Absolute Maximum Ratings* Characteristic Symbol Notes Rating Supply Voltage Output Voltage Range Input Voltage Voltage Output Current Operating Ambient Temperature Maximum Junction Temperature Storage Temperature VDD VO VI IO TA TJ(max) Tstg Range E 7.
0 –0.
5 to 24 –0.
4 to VDD + 0.
4 150 –40 to 85 150 –55 to 150 * Caution: These CMOS devices have input static protection (Class 2) but are still susceptible to damage if exposed to extremely high static electrical charges.
Units V V V mA ºC ºC ºC Thermal Characteristics may require derating at maxim...


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