A6B595KA

Overview

The A6B595KA is an 8-bit serial-input DMOS power driver manufactured by Allegro Microsystems. It integrates a CMOS shift register, data latches, and control circuitry with eight open-drain outputs capable of sinking up to 150 mA continuously. The device supports a supply voltage range of 4.5 V to 5.5 V and handles load voltages up to 50 V. It features a typical on-state resistance of 5 Ω and operates within a temperature range of -40°C to +85°C. Packaged in a 20-pin dual in-line plastic format, it interfaces directly with microprocessor systems via serial data inputs exceeding 5 MHz.

Feature Summary

• Integrates an 8-bit CMOS shift register and data latches for direct microprocessor interfacing
• Provides eight low-side DMOS power outputs with open-drain configuration
• Supports cascade connections through a dedicated CMOS serial-data output pin

Applications

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

Procurement Notes

Verify component status as the A6B595KA is listed as obsolete and no longer manufactured. Confirm availability of direct substitutes such as the TPIC6B595N from Texas Instruments if current production is required. Ensure that the replacement part matches the original package type and electrical specifications for seamless integration into existing designs.

Selection Notes

Select this component when a latch-type serial driver is required for medium-current loads. The integrated shift register simplifies interface logic compared to non-latch alternatives. Consider the 5 Ω on-resistance and 150 mA continuous sink capability for thermal management. Verify compatibility with TTL logic levels if used in mixed-voltage environments requiring appropriate pull-up resistors.

Part Context

This device belongs to the 6B595 family of power drivers, which combines digital control logic with high-voltage DMOS outputs. Similar variants include the A6595KA with reduced on-resistance. The A6B595KA specifically targets applications needing robust serial control and reliable switching for inductive or resistive loads in industrial and consumer electronics.

Replacement Considerations

The TPIC6B595N from Texas Instruments is documented as a direct substitute. Verify pinout compatibility and ensure the replacement meets the same 150 mA output current and 50 V load voltage requirements.

FAQ

What is the maximum serial-data input rate?

The serial-data input rates are over 5 MHz.

How are the outputs disabled?

All output drivers are disabled when the OUTPUT ENABLE input is held high.