A6275SLW-T

A6275SLW-T Datasheet

A6275 8-Bit Serial Input Constant-Current Latched LED Driver

Part	Datasheet
A6275SLW-T	A6275SLW-T (pdf)

Related Parts	Information
A6275EA	A6275EA
A6275SLWTR	A6275SLWTR
A6275SLW	A6275SLW
A6275SA	A6275SA
A6275ELW	A6275ELW
A6275ELWTR	A6275ELWTR
A6275SLWTR-T	A6275SLWTR-T
A6275EA-T	A6275EA-T
A6275ELWTR-T	A6275ELWTR-T

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A6275 8-Bit Serial Input Constant-Current Latched LED Driver Last Time Buy This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change November 1, 2010 Deadline for receipt of LAST TIME BUY orders April 30, 2011 Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A6279. NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. A6275 8-Bit Serial Input Constant-Current Latched LED Driver Up to 90 mA constant-current outputs Undervoltage lockout Low-power CMOS logic and latches High data-input rate Pin-compatible with TB62705CP Packages 16-pin DIP A package Not to scale 16-pin SOICW LW package TheA6275 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. A similar 150 mA output device is available as the A6277 a similar 16-bit device is available as the A6276. Two package styles are provided a through-hole DIP suffix A and a surface-mount SOICW suffix LW . Under normal applications, copper leadframes and low logic-power dissipation allow these devices to sink maximum rated current through all outputs continuously over the operating temperature range 90 mA, V drop, 85°C . Both packages are lead Pb free, with 100% matte tin leadframe plating. CLOCK SERIAL DATA IN LATCH ENABLE GROUND Functional Block Diagram VDD UVLO SERIAL-PARALLEL SHIFT REGISTER LATCHES MOS BIPOLAR LOGIC SUPPLY SERIAL DATA OUT OUTPUT ENABLE ACTIVE LOW 26185.200F OUT 0 OUT 1 OUT 2 IO REGULATOR OUT N R EXT Dwg. FP-013-3 A6275 Serial-Input Constant-Current Latched LED Driver with Open LED Detection and Dot Correction Selection Guide Part Number Package A6275EA-T A6275ELWTR-T A6275SLWTR-T 16-pin DIP 16-pin SOICW 16-pin SOICW Packing 25 per tube 1000 per reel 1000 per reel Ambient Temperature °C to 85

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A6275 8-Bit Serial Input Constant-Current Latched LED Driver

Last Time Buy

This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change November 1, 2010 Deadline for receipt of LAST TIME BUY orders April 30, 2011

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, refer to the A6279.

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A6275 8-Bit Serial Input Constant-Current Latched LED Driver

Up to 90 mA constant-current outputs Undervoltage lockout Low-power CMOS logic and latches High data-input rate Pin-compatible with TB62705CP

Packages
16-pin DIP A package

Not to scale
16-pin SOICW LW package

TheA6275 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. A similar 150 mA output device is available as the A6277 a similar 16-bit device is available as the A6276.

Two package styles are provided a through-hole DIP suffix A and a surface-mount SOICW suffix LW . Under normal applications, copper leadframes and low logic-power dissipation allow these devices to sink maximum rated current through all outputs continuously over the operating temperature range 90 mA, V drop, 85°C . Both packages are lead Pb free, with 100% matte tin leadframe plating.

CLOCK

SERIAL DATA IN

LATCH ENABLE

GROUND

Functional Block Diagram

VDD UVLO

SERIAL-PARALLEL SHIFT REGISTER LATCHES

MOS BIPOLAR

LOGIC SUPPLY

SERIAL DATA OUT

OUTPUT ENABLE ACTIVE LOW
26185.200F

OUT 0 OUT 1 OUT 2

IO REGULATOR OUT N

R EXT

Dwg. FP-013-3

A6275

Serial-Input Constant-Current Latched LED Driver with Open LED Detection and Dot Correction

Selection Guide

Part Number Package

A6275EA-T A6275ELWTR-T A6275SLWTR-T
16-pin DIP 16-pin SOICW 16-pin SOICW

Packing
25 per tube 1000 per reel 1000 per reel

Ambient Temperature °C
to 85

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Datasheet ID: A6275SLW-T 516047