A6B259KA Power Switch Driver - Equivalent & Substitute Parts

Part Overview

The A6B259KA is a Power Switch/Driver IC manufactured by Allegro MicroSystems, designed as an N-Channel 3:8 latched driver in a 20-DIP package. This component functions as a power management device with 8 low-side N-channel outputs, each capable of 150mA maximum output current. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

A6B259KA

Allegro MicroSystemsIn Stock: 1080A6B259KA Datasheet

Current PartRFQ

TPIC6B259N

Texas InstrumentsIn Stock: 1157TPIC6B259N Datasheet

DirectRFQ

TPIC6259N

Texas InstrumentsIn Stock: 1909TPIC6259N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the A6B259KA are identified based on strict alignment with the following critical parameters:

• Package compatibility: 20-DIP (0.300", 7.62mm) through-hole mounting
• Output configuration: 8-output addressable architecture with 3:8 input-to-output ratio
• Supply voltage range: 4.5V ~ 5.5V operation
• Operating temperature range: -40°C ~ 125°C
• Output type: N-Channel low-side driver configuration

The substitute parts listed below maintain these core electrical and mechanical specifications, enabling direct functional replacement in existing designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

TPIC6B259N is the primary substitute option. This Texas Instruments component maintains full package and pinout compatibility with the A6B259KA while offering active product status and ROHS3 compliance. The DMOS output type provides enhanced performance characteristics suitable for modern applications requiring low on-resistance switching.

TPIC6259N serves as an alternative substitute with identical package and supply voltage specifications. This variant features standard output type and longer propagation delay (625ns versus 150ns), making it suitable for applications where switching speed is not a critical constraint.

Both substitute parts are currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete A6B259KA. Selection between TPIC6B259N and TPIC6259N should be based on specific propagation delay requirements and performance specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can TPIC6B259N and TPIC6259N be used interchangeably with A6B259KA?

A: Both parts share identical 20-DIP package dimensions, pinout compatibility, and supply voltage specifications (4.5V ~ 5.5V). Functional substitution is valid when application timing requirements align with the specified propagation delays. TPIC6B259N (150ns) is recommended for time-sensitive applications, while TPIC6259N (625ns) is suitable for general-purpose switching applications.

Q: What is the primary difference between TPIC6B259N and TPIC6259N?

A: The primary difference is propagation delay. TPIC6B259N features DMOS output technology with 150ns propagation delay, while TPIC6259N uses standard output technology with 625ns propagation delay. Both maintain identical supply voltage ranges and operating temperature specifications.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both TPIC6B259N and TPIC6259N are ROHS3 compliant, whereas the original A6B259KA is RoHS non-compliant. This compliance improvement may be relevant for applications subject to environmental or regulatory requirements.

Q: Will existing PCB layouts require modification for substitution?

A: No. Both substitute parts use the same 20-DIP (0.300", 7.62mm) through-hole package as the A6B259KA, enabling direct PCB layout compatibility without redesign.

Q: What is the availability status of these substitute parts?

A: TPIC6B259N and TPIC6259N are both active products from Texas Instruments with current inventory availability, providing superior long-term supply chain stability compared to the obsolete A6B259KA.