MC34017A-2P

Telecom Overview

The MC34017A-2P is a telephone tone ringer integrated circuit designed to replace traditional mechanical bells. It operates from an AC ringing signal, utilizing an internal diode bridge for rectification and power generation. The device features a push-pull output stage capable of driving piezoelectric transducers directly with a peak-to-peak voltage of 37 V. As the -2 variant, it generates high and low tones at 2020 Hz and 1616 Hz respectively, with a warble frequency of 12.5 Hz. It includes on-chip transient protection and meets EIA impedance standards.

Telecom Feature Summary

• Complete replacement circuit for mechanical telephone bells with minimal external components
• Integrated full-wave diode bridge and SCR-based transient protection for line safety
• Direct drive capability for piezoelectric sound elements via push-pull output stage
• Built-in threshold comparator that rejects rotary dial transients

Telecom Applications

• Telecommunications equipment requiring acoustic alerting
• Replacement circuits for legacy mechanical bell systems
• Telephone sets utilizing piezoelectric transducers

Telecom Procurement Notes

Verify the specific suffix 'P' corresponds to the 8-lead Plastic DIP package as documented in the ordering information. Confirm the operating temperature range aligns with system requirements, noting the specified range is -20°C to 60°C. Ensure compatibility with the original Freescale Semiconductor design specifications if sourcing through current distributors.

Telecom Selection Notes

Select the MC34017A-2P specifically when a base frequency of 2.0 kHz is required for the tone generation. Compare against variants -1 (1.0 kHz) and -3 (500 Hz) based on desired audio output characteristics. Consider the 8-pin DIP package constraint for PCB layout and verify that the 37 Vpp output swing matches the connected transducer's voltage rating.

Telecom Part Context

This component belongs to the 34017A series of bipolar linear/I2L analog integrated circuits originally manufactured by Freescale Semiconductor. The series provides complete tone ringer solutions for telephony applications. The MC34017A-2P represents the specific frequency configuration within this family, distinguished by its 2.0 kHz oscillator base setting.

Telecom Replacement Considerations

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