MC34119DTB

Audio Amplifiers Overview

The MC34119DTB is a low-power audio amplifier integrated circuit designed by Freescale Semiconductor, originally developed by Motorola. It features a differential output structure capable of driving speakers with impedances ranging from 8 to 100 ohms without requiring external coupling capacitors. The device operates on a supply voltage between 2V and 16V, supporting both telephone line DC feed and dry battery power. Typical static current is 2.7mA, reducing to 65µA in shutdown mode via the disable pin. Key electrical parameters include an open-loop gain of 80dB, a closed-loop gain range of 0-46dB, and a power supply rejection ratio of 52dB. At Vcc=6V with a 32Ω load, it delivers over 250mW output power with a typical total harmonic distortion of 0.5%. The component functions within a temperature range of -20°C to 70°C.

Audio Amplifiers Feature Summary

• Differential output architecture eliminates the need for external coupling capacitors when driving loads.
• Integrated low-power shutdown mode significantly reduces current consumption for battery-operated applications.
• Supports direct connection to telephone lines through DC feed capability and wide operating voltage range.
• Adjustable closed-loop gain allows flexible signal amplification configuration via external resistors.

Audio Amplifiers Applications

• Speakerphones and telecommunication handsets
• Portable electronic devices requiring low-power audio amplification
• Battery-powered audio equipment

Audio Amplifiers Procurement Notes

Verify the specific suffix 'DTB' against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperature ranges and voltage levels for the target application. Cross-reference part numbers with authorized distributors to confirm authenticity and availability status.

Audio Amplifiers Selection Notes

Select this component for designs requiring simple, capacitor-less speaker drive in portable or telecom environments. Consider the 2V minimum supply voltage for battery efficiency. Evaluate the 80dB open-loop gain and adjustable closed-loop gain settings against system noise requirements. Verify that the 8-100Ω load impedance range matches the connected speaker specifications.

Audio Amplifiers Part Context

The MC34119 series belongs to Freescale's portfolio of small-signal audio amplifiers, originating from Motorola's semiconductor division. These components are engineered for cost-effective audio solutions in communication devices. The DTB variant typically denotes a specific surface-mount package configuration, distinguishing it from through-hole options like DIP-8 while maintaining identical electrical performance characteristics.

Audio Amplifiers Replacement Considerations

Consult official datasheets for cross-reference information regarding compatible replacements from other manufacturers. Verify pinout compatibility and electrical parameter equivalence before substitution.