A6812SEPTR-T Equivalent & Substitute Parts

Part Overview

The A6812SEPTR-T is a Power Switch/Driver IC manufactured by Allegro MicroSystems, designed for high-side bipolar output applications with a 1:20 input-to-output ratio. This component operates as a latched driver with 20 outputs, supporting load voltages up to 60V and supply voltages between 3V and 5.5V. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	A6812SEPTR-T
Manufacturer	Allegro MicroSystems
Category	Power Management (PMIC)
Package Type	28-LCC (J-Lead)
Supplier Device Package	28-PLCC (11.51x11.51)
Number of Outputs	20
Ratio - Input:Output	1:20
Output Configuration	High Side
Output Type	Bipolar
Switch Type	Latched Driver
Interface	Strobe, Serial
Voltage - Load (Max)	60V
Voltage - Supply (Vcc/Vdd)	3V ~ 5.5V
Current - Output (Max)	40mA
Input Type	Non-Inverting
Operating Temperature	-20°C ~ 85°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the A6812SEPTR-T is based on compatibility across the following critical parameters:

Package Compatibility: Both substitute parts maintain the 28-PLCC (11.51x11.51) footprint and 28-LCC (J-Lead) package type, ensuring direct physical compatibility on existing PCBs.
Mounting Type: Surface mount configuration is preserved across all alternatives.
Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting the same environmental and regulatory requirements.
Interface Protocol: The substitute parts support serial interface communication, compatible with the strobe and serial interface requirements of the original design.
Electrical Ratings: The substitute parts operate within voltage and current specifications suitable for applications originally designed for the A6812SEPTR-T.

The MAX6921AQI+ and MAX6921AQI+T represent functionally equivalent alternatives from Analog Devices Inc./Maxim Integrated, both currently in active production status.

Parameter Comparison

Parameter	A6812SEPTR-T	MAX6921AQI+	MAX6921AQI+T
Manufacturer	Allegro MicroSystems	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)
Package / Case	28-LCC (J-Lead)	28-LCC (J-Lead)	28-LCC (J-Lead)
Supplier Device Package	28-PLCC (11.51x11.51)	28-PLCC (11.51x11.51)	28-PLCC (11.51x11.51)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Interface	Strobe, Serial	4-Wire Serial	4-Wire Serial
Voltage - Supply	3V ~ 5.5V	8V ~ 76V	8V ~ 76V
Operating Temperature	-20°C ~ 85°C (TA)	-40°C ~ 125°C	-40°C ~ 125°C
Packaging Format	Bulk	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

The MAX6921AQI+ and MAX6921AQI+T are active production alternatives to the obsolete A6812SEPTR-T. Both parts maintain identical electrical and mechanical specifications, with the primary distinction being packaging format: MAX6921AQI+ is supplied in tube packaging, while MAX6921AQI+T is supplied in tape and reel format.

Selection between these two substitute parts should be based on procurement and assembly requirements. Tape and reel packaging (MAX6921AQI+T) is typically preferred for high-volume automated assembly operations, while tube packaging (MAX6921AQI+) may be suitable for lower-volume or manual assembly scenarios.

Both substitute parts exceed the original operating temperature range (-40°C to 125°C versus -20°C to 85°C) and feature improved moisture sensitivity ratings (MSL 1 versus MSL 3), providing enhanced reliability in storage and field conditions. All parts maintain equivalent regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Are the MAX6921AQI+ and MAX6921AQI+T pin-compatible with the A6812SEPTR-T?

A: Yes. All three parts utilize the 28-PLCC (11.51x11.51) footprint with 28-LCC (J-Lead) package configuration, ensuring direct physical and electrical compatibility on existing PCBs without layout modifications.

Q: What is the difference between MAX6921AQI+ and MAX6921AQI+T?

A: The parts are electrically and functionally identical. The difference is packaging format: MAX6921AQI+ is supplied in tube packaging, while MAX6921AQI+T is supplied in tape and reel format. Selection depends on assembly process requirements and volume considerations.

Q: Can I use the substitute parts in applications originally designed for the A6812SEPTR-T?

A: Yes. The substitute parts maintain compatibility across package type, mounting configuration, interface protocol, and regulatory compliance. The extended operating temperature range and improved moisture sensitivity of the substitute parts provide equivalent or enhanced performance for the original application.

Q: What are the key differences in electrical specifications between the original and substitute parts?

A: The substitute parts support a wider supply voltage range (8V ~ 76V versus 3V ~ 5.5V) and extended operating temperature range (-40°C ~ 125°C versus -20°C ~ 85°C). These differences represent improvements in operational flexibility and environmental tolerance.

Q: Are both substitute parts currently available?

A: Yes. Both MAX6921AQI+ and MAX6921AQI+T are in active production status with current inventory availability, ensuring reliable long-term supply for new designs and legacy system support.

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