A6812SLW Equivalent & Substitute Parts

Part Overview

The A6812SLW is a Power Switch/Driver IC manufactured by Allegro MicroSystems, configured as a 1:20 bipolar latched driver with 20 high-side outputs. This component is designed for applications requiring multiplexed power distribution with serial interface control. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. Substitute parts must maintain compatibility with the 28-SOIC package, serial interface requirements, and output drive characteristics.

Substiute Parts

A6812SLW

Allegro MicroSystemsIn Stock: 718A6812SLW Datasheet

Current PartRFQ

HV5812WG-G

Microchip TechnologyIn Stock: 1248HV5812WG-G Datasheet

MFR RecommendedRFQ

MAX6921AWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1027MAX6921AWI+ Datasheet

MFR RecommendedRFQ

MAX6921AWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3482MAX6921AWI+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A6812SLW are selected based on the following critical parameters:

• Package Compatibility: All substitutes must use 28-SOIC (0.295", 7.50mm Width) surface mount packaging to ensure PCB layout compatibility
• Output Configuration: 20-channel high-side driver architecture with serial interface control
• Electrical Interface: Serial communication protocol for multiplexed output control
• Load Voltage Rating: Minimum 60V load voltage capability
• Supply Voltage Range: Compatible with 3V to 5.5V logic supply levels
• Output Drive Capability: Minimum 40mA per output channel

The identified substitutes operate as vacuum fluorescent (VF) display drivers with equivalent 20-channel serial-controlled output architecture. While the A6812SLW is classified as a power switch/driver and the substitutes are specified for VF display applications, both device classes share identical electrical interface requirements, output multiplexing topology, and package specifications. The functional equivalence is established through matching output count, serial control protocol, high-side configuration, and 28-SOIC packaging.

Parameter Comparison

Engineering Selection Recommendations

MAX6921AWI+T (Tape & Reel Packaging) is the primary substitute for new production designs. This part maintains active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The tape & reel packaging format supports automated assembly processes. Supply voltage range of 8V ~ 76V exceeds the A6812SLW requirement, providing design flexibility for higher voltage applications.

MAX6921AWI+ (Tube Packaging) provides an equivalent alternative with identical electrical specifications to the MAX6921AWI+T variant. The tube packaging format is suitable for lower-volume applications or manual assembly environments. Product status is active with ROHS3 compliance.

HV5812WG-G offers a secondary substitute option with active product status and ROHS3 compliance. The supply voltage range of 4.5V ~ 5.5V aligns more closely with the A6812SLW specification. This part is available in tape & reel packaging for automated assembly.

All three substitutes provide 20-channel high-side output configuration in 28-SOIC packaging with serial interface control. Selection between substitutes should be based on packaging format requirements (tape & reel versus tube), supply voltage range compatibility with system design, and component availability through distribution channels.

Frequently Asked Questions (FAQ)

Q: Can MAX6921AWI+T directly replace A6812SLW in existing designs?

A: Yes, from a functional and package perspective. Both devices provide 20-channel high-side serial-controlled outputs in 28-SOIC packaging. However, the supply voltage range differs: A6812SLW operates at 3V ~ 5.5V while MAX6921AWI+T operates at 8V ~ 76V. Verify that your system supply voltage is compatible with the substitute part's operating range.

Q: What is the difference between MAX6921AWI+T and MAX6921AWI+?

A: Both parts are electrically identical with the same specifications. The primary difference is packaging format: MAX6921AWI+T is supplied in tape & reel format suitable for automated pick-and-place assembly, while MAX6921AWI+ is supplied in tube format suitable for manual handling or lower-volume applications.

Q: Why does HV5812WG-G have a lower supply voltage range than MAX6921AWI+?

A: HV5812WG-G is optimized for standard logic supply voltages (4.5V ~ 5.5V), while MAX6921AWI+ supports extended voltage range (8V ~ 76V) for applications requiring higher load voltage levels. Select based on your system's supply voltage requirements.

Q: Are all substitutes RoHS compliant?

A: Yes. MAX6921AWI+T, MAX6921AWI+, and HV5812WG-G are all ROHS3 compliant. The original A6812SLW is RoHS non-compliant. If RoHS compliance is required for your application, substitutes are necessary.

Q: Do all substitutes use the same 28-SOIC package?

A: Yes. All substitutes use 28-SOIC (0.295", 7.50mm Width) surface mount packaging, ensuring PCB footprint compatibility with the A6812SLW.

Q: What is the operating temperature range difference?

A: A6812SLW operates from -20°C ~ 85°C, while all three substitutes operate from -40°C ~ 125°C. Substitutes provide extended temperature range capability, beneficial for industrial or automotive applications.