A6276EA-T LED Driver IC Equivalent & Substitute Parts

Part Overview

The A6276EA-T is a linear LED driver IC manufactured by Allegro MicroSystems, designed for 16-output shift register applications with 75.5mA per-channel output capability. This device operates within a 4.5V to 5.5V supply range and is packaged in a 24-DIP through-hole configuration. The product is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Substitute parts maintain the core 16-output linear shift register topology while offering variations in output current, supply voltage range, package type, and product status to support active production environments.

Key Parameters

Parameter	A6276EA-T
Manufacturer	Allegro MicroSystems
Category	Power Management (PMIC)
Product Status	Obsolete
Type	Linear
Topology	Shift Register
Number of Outputs	16
Voltage - Supply (Min)	4.5V
Voltage - Supply (Max)	5.5V
Voltage - Output	4V
Current - Output / Channel	75.5mA
Frequency	20MHz
Internal Switch(s)	Yes
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	24-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the A6276EA-T is determined by the following core parameters:

Mandatory Compatibility Criteria:

Topology: Shift Register (16-output linear configuration)
Internal Switches: Yes (required for LED driver functionality)
Number of Outputs: 16 (functional equivalence)
Supply Voltage Range: Minimum 3V to 5.5V (accommodates original 4.5V–5.5V range)
RoHS3 Compliance: Required for regulatory alignment

Variable Parameters Allowing Substitution:

Current - Output / Channel: Range 35mA to 120mA (application-dependent selection)
Voltage - Output: Range 4V to 20V (load-dependent)
Frequency: Range 20MHz to 35MHz (timing margin acceptable)
Mounting Type: Through Hole or Surface Mount (design-dependent)
Package / Case: DIP, TSSOP, SSOP, SOIC, VQFN, PowerTSSOP (footprint-dependent)
Operating Temperature: -40°C to 85°C or -40°C to 125°C (application-dependent)
Product Status: Active preferred for new designs (obsolete parts have limited availability)

Substitute parts are grouped by output current capability and package type to facilitate selection based on design constraints.

Parameter Comparison

Parameter	A6276EA-T	MAX6969AUG+	STP16DPP05MTR	TLC59116FIPWR	TLC5923DAPR	TLC5924RHBR	TLC59283RGET	TLC5928DBQ	TLC5928PWR	TLC5929PWPR	TLC59401PWPR
Manufacturer	Allegro MicroSystems	Analog Devices Inc./Maxim Integrated	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Type	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear	Linear
Topology	Shift Register	Shift Register	Shift Register	—	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register
Number of Outputs	16	16	16	16	16	16	16	16	16	16	16
Voltage - Supply (Min)	4.5V	3V	3V	3V	3V	3V	3V	3V	3V	3V	3V
Voltage - Supply (Max)	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V	5.5V
Voltage - Output	4V	5.5V	20V	17V	17V	15V	10V	17V	17V	10V	17V
Current - Output / Channel	75.5mA	55mA	40mA	120mA	80mA	80mA	45mA	35mA	35mA	50mA	120mA
Frequency	20MHz	—	30MHz	25MHz	30MHz	30MHz	35MHz	35MHz	35MHz	20MHz	30MHz
Internal Switch(s)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	24-DIP (0.300", 7.62mm)	24-TSSOP (0.173", 4.40mm)	24-SOIC (0.295", 7.50mm)	28-TSSOP (0.173", 4.40mm)	32-PowerTSSOP (0.240", 6.10mm)	32-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-SSOP (0.154", 3.90mm)	24-TSSOP (0.173", 4.40mm)	24-PowerTSSOP (0.173", 4.40mm)	28-PowerTSSOP (0.173", 4.40mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	2 (1 Year)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

For Through-Hole PCB Designs: No active substitute parts are available in through-hole packaging. The A6276EA-T operates exclusively in 24-DIP format. Designs requiring through-hole mounting must retain the A6276EA-T or undergo PCB redesign to accommodate surface-mount alternatives.

For Surface-Mount PCB Designs with Output Current ≥75mA: TLC59116FIPWR and TLC59401PWPR both deliver 120mA per-channel output, exceeding the A6276EA-T specification. Both are active products with ROHS3 compliance. TLC59116FIPWR operates to 85°C; TLC59401PWPR extends to 85°C with 28-HTSSOP packaging. TLC59401PWPR is preferred for applications requiring backlight or signage functionality.

For Surface-Mount PCB Designs with Output Current 50–80mA: TLC5923DAPR (80mA, 32-PowerTSSOP), TLC5924RHBR (80mA, 32-VFQFN), and TLC5929PWPR (50mA, 24-PowerTSSOP) provide mid-range current capability. All are active products with ROHS3 compliance and -40°C to 85°C operating range. TLC5929PWPR offers the smallest footprint in 24-PowerTSSOP.

For Surface-Mount PCB Designs with Output Current <50mA: TLC59283RGET (45mA, 24-VQFN), TLC5928DBQ (35mA, 24-SSOP), and TLC5928PWR (35mA, 24-TSSOP) are suitable for lower-current applications. All are active products with ROHS3 compliance. TLC5928PWR offers unlimited MSL rating and highest inventory availability (35,100 units).

For Extended Temperature Range (-40°C to 125°C): MAX6969AUG+ and STP16DPP05MTR both support 125°C maximum operating temperature. MAX6969AUG+ delivers 55mA per-channel; STP16DPP05MTR delivers 40mA per-channel. Both are active products with ROHS3 compliance.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and REACH unaffected status. All are classified as active products with current manufacturing support. Inventory availability ranges from 1,344 to 35,100 units across substitute options.

Frequently Asked Questions (FAQ)

Q: Can the A6276EA-T be directly replaced with a surface-mount substitute without PCB redesign?

A: No. The A6276EA-T is packaged in 24-DIP through-hole format. All substitute parts use surface-mount packages (TSSOP, SSOP, SOIC, VQFN, PowerTSSOP). PCB redesign is required to accommodate surface-mount footprints.

Q: What is the minimum output current requirement for selecting a substitute?

A: The A6276EA-T delivers 75.5mA per-channel. Substitute parts range from 35mA to 120mA. Selection depends on LED load requirements. Parts delivering ≥75mA (TLC59116FIPWR, TLC59401PWPR, TLC5923DAPR, TLC5924RHBR) provide equivalent or greater current capacity. Lower-current parts (35–50mA) are suitable only if application requirements permit reduced current.

Q: Are all substitute parts compatible with the original 4.5V–5.5V supply range?

A: Yes. All substitute parts accept 3V–5.5V supply voltage, which encompasses the original 4.5V–5.5V range. However, designs operating at 3V–4.5V require verification that the A6276EA-T minimum supply specification (4.5V) is not a design constraint.

Q: What is the difference between shift register and I2C dimming topologies?

A: The A6276EA-T uses shift register topology, requiring serial data input for LED control. TLC59116FIPWR uses I2C dimming, requiring I2C bus interface. These are functionally different control methods. Shift register substitutes (all listed except TLC59116FIPWR) maintain the original serial interface. TLC59116FIPWR requires firmware and PCB modifications to implement I2C communication.

Q: Which substitute offers the smallest PCB footprint?

A: TLC59283RGET in 24-VQFN (4x4) format provides the smallest footprint among 16-output options. TLC5928DBQ in 24-SSOP (0.154" width) offers the narrowest width. Selection depends on specific PCB layout constraints.

Q: What is MSL (Moisture Sensitivity Level) and why does it matter?

A: MSL indicates moisture absorption limits during storage and handling. MSL 1 (unlimited) parts like A6276EA-T and TLC5928PWR require no special moisture control. MSL 2 and MSL 3 parts require controlled storage environments and baking procedures before reflow soldering. For high-volume production, MSL 1 parts reduce handling complexity.

Q: Can TLC59116FIPWR replace the A6276EA-T in existing designs?

A: TLC59116FIPWR is functionally equivalent in output count (16) and current capacity (120mA), but uses I2C control instead of shift register serial input. Existing designs using shift register protocol cannot use TLC59116FIPWR without firmware and hardware modifications. Use shift register topology substitutes (TLC5923DAPR, TLC5924RHBR, TLC5928PWR, TLC5929PWPR, TLC59401PWPR) for direct protocol compatibility.

Q: Which substitute has the highest inventory availability?

A: TLC5928PWR has 35,100 units in stock, the highest availability among all substitutes. This part delivers 35mA per-channel in 24-TSSOP packaging with unlimited MSL rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the A6276EA-T.

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