TB6674FAG,8,EL

Overview

The TB6674FAG,8,EL is a two-phase bipolar stepping motor driver IC from Toshiba. It integrates control and power stages for driving induced loads. The device supports a load voltage range of 2.7 V to 22 V and operates with a supply voltage between 4.5 V and 5.5 V. It features an output current capability of 350 mA in start mode and 100 mA in hold mode. The component functions within a temperature range of -30°C to +75°C and utilizes a 16-HSOP surface-mount package.

Feature Summary

• Integrates dual-bridge driver circuitry for bipolar stepping motor operation
• Includes built-in power-saving and standby circuits to reduce consumption
• Features TTL-compatible inputs for INA, INB, and PS pins
• Contains punch-through current restriction for system reliability

Applications

• 3.5-inch floppy disk drive head actuator drives
• 5.25-inch floppy disk drive head actuator drives
• General purpose stepper motor control systems

Procurement Notes

Verify the specific suffix configuration against official Toshiba documentation to ensure compatibility with required lead-free standards and packaging formats. Confirm that the 16-HSOP package dimensions align with the target PCB layout constraints. Cross-reference the part number with the manufacturer's latest lifecycle status to confirm availability for new designs or existing production runs.

Selection Notes

Select this component when a compact solution for bipolar stepper motors is required. It is suitable for applications needing integrated control and power stages without external drivers. Consider the thermal dissipation capabilities of the HSOP package relative to the expected current load. Ensure the input logic levels match the TTL-compatible requirements of the driving microcontroller.

Part Context

This part belongs to the TA7774 series of bipolar linear integrated circuits designed specifically for floppy disk drive actuators. It represents a silicon monolithic technology implementation by Toshiba Semiconductor and Storage. The series emphasizes reduced physical size and lower power consumption compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.