M-8880-01SM

Telecom Overview

The M-8880-01SM is a complete Dual-Tone Multi-Frequency (DTMF) transceiver manufactured by IXYS Integrated Circuits Division, housed in a 20-pin plastic SOIC package. It operates on a single +5 Volt power supply with a typical operating current of 10 mA and a maximum of 15 mA. The device supports an operating temperature range from -40°C to +85°C. It utilizes advanced CMOS technology for low power consumption and noise immunity, featuring a standard 6500/6800 series microprocessor interface capable of 2 MHz operation.

Telecom Feature Summary

• Integrates a high-performance DTMF receiver based on the industry-standard M-8870 architecture and a switched-capacitor digital-to-analog converter transmitter for low-distortion signaling.
• Provides adjustable guard time and automatic tone burst mode capabilities, allowing precise control over signal duration and pause intervals for central office quality performance.
• Includes a selectable call progress filter mode that enables the detection of network call progress tones via the IRQ/CP pin when configured appropriately.

Telecom Applications

• Paging systems
• Repeater systems and mobile radio interconnect dialers
• PBX systems and computer systems
• Fax machines and pay telephones
• Credit card verification terminals

Telecom Procurement Notes

Verify the specific suffix SM indicates the 20-pin plastic SOIC package configuration as documented in the ordering information. Confirm that the component meets the required industrial temperature range specifications for the intended deployment environment. Ensure compatibility with the target microprocessor's voltage levels and timing requirements before integration.

Telecom Selection Notes

Select this component when a combined DTMF transmit and receive function is required within a single integrated circuit. It is suitable for designs utilizing standard 6500 or 6800 series microprocessors due to its compatible interface. Consider the adjustable guard time features if system-specific talkoff immunity or noise rejection parameters are critical to the application design.

Telecom Part Context

The M-8880 is part of a family of DTMF transceivers that includes variants such as the M-8880-01P (DIP) and M-8880-01T (Tape and Reel). These devices share identical functional characteristics but differ in packaging options to accommodate various manufacturing and assembly requirements.

Telecom Replacement Considerations

The MT8880CSR1 is a documented equivalent DTMF transceiver offering similar functionality. Verify pinout compatibility and register mapping differences between the M-8880 and potential substitute parts before implementation.