A6275SLW LED Driver IC Equivalent & Substitute Parts

Part Overview

The A6275SLW is an 8-output linear LED driver IC manufactured by Allegro MicroSystems, designed for shift register-based LED dimming applications. This device operates with an internal switch topology and supports 75.5mA per output channel. The part is currently classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching topology, output count, and electrical operating parameters.

Substiute Parts

A6275SLW

Allegro MicroSystemsIn Stock: 662A6275SLW Datasheet

Current PartRFQ

HEF4794BT,118

Nexperia USA Inc.In Stock: 8847HEF4794BT,118 Datasheet

MFR RecommendedRFQ

MAX6968AAE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 833MAX6968AAE+T Datasheet

MFR RecommendedRFQ

TB62785NG

Toshiba Semiconductor and StorageIn Stock: 826TB62785NG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A6275SLW are selected based on the following critical parameters that define functional compatibility:

Core Compatibility Criteria:

• Topology: Shift Register (all substitutes maintain this topology)
• Number of Outputs: 8 channels (all substitutes provide 8 outputs)
• Internal Switch(es): Yes (all substitutes include internal switching capability)
• Type: Linear (all substitutes are linear LED drivers)

Electrical Operating Range:

• Supply voltage overlap with A6275SLW (4.5V–5.5V range)
• Output current capability per channel
• Output voltage rating

Physical Compatibility:

• Surface mount or through-hole mounting options
• Package form factor considerations for PCB layout

The three substitute parts listed below meet the core topology and output requirements. However, each presents distinct trade-offs in supply voltage range, output current capacity, package type, and product status that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

HEF4794BT,118 (Nexperia USA Inc.)

This substitute is active and ROHS3 compliant. It operates within the A6275SLW supply voltage range (4.5V–5.5V overlap) and maintains the 8-output shift register topology. The output current per channel is 40mA, which is lower than the A6275SLW's 75.5mA. This part is suitable for applications where lower per-channel current is acceptable. The extended supply voltage range (3V–15V) provides additional design flexibility. Surface mount packaging in 16-SOIC form factor enables direct PCB layout compatibility with minor footprint adjustments due to different package width (3.90mm vs. 7.50mm).

MAX6968AAE+T (Analog Devices Inc./Maxim Integrated)

This substitute is active and ROHS3 compliant. It operates within the A6275SLW supply voltage range (4.5V–5.5V) with matching output voltage rating of 5.5V. The output current per channel is 55mA, which is lower than the A6275SLW's 75.5mA but higher than the HEF4794BT,118. This part is suitable for applications requiring moderate per-channel current. Surface mount packaging in 16-SSOP form factor requires PCB layout modification due to different package type and width (5.30mm vs. 7.50mm).

TB62785NG (Toshiba Semiconductor and Storage)

This substitute is active and ROHS3 compliant. It operates within the A6275SLW supply voltage range (4.5V–5.5V) and maintains the 8-output shift register topology. The output current per channel is 50mA, which is lower than the A6275SLW's 75.5mA. The output voltage rating of 17V exceeds the A6275SLW's 4V, providing higher voltage capability. Through-hole mounting in 24-SDIP package requires significant PCB layout redesign compared to the surface mount 16-SOIC original. This option is suitable for applications where through-hole assembly is preferred or required.

All three substitutes are active products with current manufacturing status and ROHS3 compliance, addressing the obsolescence of the A6275SLW. Selection depends on output current requirements, package preference, and PCB assembly constraints.

Frequently Asked Questions (FAQ)

Q: Can HEF4794BT,118 directly replace A6275SLW in existing designs?

A: HEF4794BT,118 maintains the same 8-output shift register topology and operates within the A6275SLW supply voltage range (4.5V–5.5V). However, the output current per channel is 40mA versus 75.5mA for the A6275SLW. Direct replacement is possible only if the application does not require the full 75.5mA per-channel current. The 16-SOIC package footprint differs in width (3.90mm vs. 7.50mm), requiring PCB layout verification.

Q: What is the key difference between MAX6968AAE+T and TB62785NG?

A: Both parts maintain the 8-output shift register topology and operate within the A6275SLW supply voltage range. MAX6968AAE+T is surface mount (16-SSOP), while TB62785NG is through-hole (24-SDIP). MAX6968AAE+T provides 55mA per channel; TB62785NG provides 50mA per channel. TB62785NG offers higher output voltage rating (17V vs. 5.5V). Package selection depends on assembly method and PCB design constraints.

Q: Are all substitute parts RoHS compliant?

A: Yes. HEF4794BT,118, MAX6968AAE+T, and TB62785NG are all ROHS3 compliant. The original A6275SLW is RoHS non-compliant. If RoHS compliance is required for new designs or production, all three substitutes meet this requirement.

Q: Which substitute has the highest output current per channel?

A: MAX6968AAE+T provides 55mA per channel, which is the highest among the substitutes. However, all three substitutes provide lower per-channel current than the A6275SLW's 75.5mA. If the application requires 75.5mA per channel, none of these substitutes are suitable without circuit redesign.

Q: Can TB62785NG be used in surface mount applications?

A: No. TB62785NG is a through-hole device in 24-SDIP package. It requires through-hole PCB assembly and cannot be used in surface mount applications without significant redesign. For surface mount requirements, HEF4794BT,118 or MAX6968AAE+T are appropriate options.

Q: What is the operating temperature range difference between substitutes?

A: HEF4794BT,118 and MAX6968AAE+T both operate from -40°C to 125°C, which exceeds the A6275SLW range of -20°C to 85°C. TB62785NG operates from -40°C to 85°C, matching the upper temperature limit of the A6275SLW. For applications requiring extended low-temperature operation below -20°C, HEF4794BT,118 and MAX6968AAE+T provide additional capability.