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Product Detailed Parameters
- Description：IC LED DRVR LINEAR 75.5MA 24SOIC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：4V
- Current - Output / Channel：75.5mA
- Frequency：20MHz
- Dimming：-
- Applications：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Grade：-
- Qualification：-
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Overview
The A6276ELWTR-T is a linear LED driver IC featuring a 16-bit serial input shift register and data latches. It provides sixteen constant-current sink drivers with an output current of 75.5mA per channel. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum data input rate of 20MHz. It is housed in a 24-SOIC package and functions within a temperature range of -40°C to 85°C.
Feature Summary
- Integrates a 16-bit CMOS shift register and data latches for direct microprocessor interfacing.
- Provides sixteen constant-current NPN sink drivers for uniform LED illumination.
- Supports cascade connections via a dedicated CMOS serial data output pin.
Applications
- LED display systems requiring serial data control
- Segmented LED indicator arrays
- Automotive interior lighting modules
Procurement Notes
Verify the specific suffix ELWTR-T against official Allegro documentation to confirm the tape-and-reel packaging configuration and SOIC-24 variant. Ensure compatibility with existing board layouts regarding the 24-pin footprint and thermal dissipation requirements. Cross-reference the datasheet revision history to validate electrical characteristics and ensure no design-in obsolescence warnings apply to this specific ordering code.
Selection Notes
Select this component when a high-speed serial interface is required to drive multiple LEDs from a single controller line. The integrated latch mechanism simplifies system architecture by reducing pin count compared to parallel solutions. Consider the 75.5mA constant current capability for standard brightness applications and verify that the 20MHz input rate meets the refresh speed requirements of the target display or lighting application.
Part Context
This part belongs to the A6276 family of BiCMOS LED drivers designed specifically for display applications. It serves as a functional replacement for legacy components like the TB62706BN/BF, offering improved integration through its built-in shift register and latch structure while maintaining compatibility with standard logic levels.
Replacement Considerations
The A6275 series (e.g., A6275SLW) offers similar functionality but features only eight outputs instead of sixteen. Verify that the reduced channel count meets the application requirements before substituting.
