A6259KLW

Overview

The A6259KLW is an 8-bit addressable DMOS power driver integrating a 3-to-8 line CMOS decoder, data latches, and control circuitry. It features eight open-drain outputs capable of sinking up to 750 mA peak current per output or 250 mA continuously across all channels. The device operates with a logic supply voltage range of 4.5 V to 5.5 V and supports a minimum output clamp voltage of 50 V. Typical on-state resistance is 1.3 Ω at 25°C, rising to 2.0 Ω at elevated temperatures.

Feature Summary

• Integrates 3-to-8 line decoder with addressable transparent latches for direct microprocessor interfacing
• Supports four selectable operational modes: addressable latch, memory, demultiplexer/decoder, and clear
• Features low static drain-source leakage current and reduced supply current requirements
• Utilizes copper lead frames and low on-state resistance for efficient thermal performance

Applications

• Relay driving circuits
• Solenoid control systems
• Medium-current peripheral power loads
• High-voltage peripheral switching applications

Procurement Notes

This component has been officially discontinued as of April 30, 2007. Samples are no longer available from the manufacturer. Verification of current availability should be conducted through authorized distributors or by contacting local Allegro field applications engineers. Designers must confirm end-of-life status before initiating any procurement processes.

Selection Notes

Select this device for applications requiring addressable control of multiple high-side or low-side loads via standard CMOS logic interfaces. Ensure the load current does not exceed 250 mA continuous per channel when operating at ambient temperatures above 85°C. Verify that the system logic levels align with the specified VIH and VIL thresholds for reliable operation.

Part Context

The A6259KLW belongs to the A6259 family of 8-bit addressable DMOS power drivers. It shares electrical characteristics with the A6259KA but utilizes a 20-lead wide-body small-outline plastic package (SOIC) with gull-wing leads designed for surface-mount applications. Both variants offer identical terminal assignments and functional capabilities.

Replacement Considerations

The datasheet identifies the TPIC6259N and TPIC6259DW as replacement devices. These alternatives provide similar functionality for driving relays and solenoids. Engineers should verify pin compatibility and electrical specifications against the original design requirements before implementing these substitutes.

FAQ

How many operational modes does the A6259KLW support?

The device supports four modes of operation selectable via CLEAR and ENABLE inputs: addressable-latch mode, memory mode, demultiplexing/decoding mode, and clear mode.

What is the maximum continuous output current per channel?

Each output can sink up to 250 mA continuously when all outputs are active. Peak pulse currents can reach 750 mA under specific duty cycle constraints.

Can the A6259KLW interface directly with TTL logic?

While designed for CMOS inputs, use with TTL may require appropriate pull-up resistors to ensure the input logic high level meets the specified threshold requirements.