MT8880CE1

Telecom Overview

The MT8880CE1 is a single-chip Dual-Tone Multi-Frequency (DTMF) signaling circuit manufactured by Microchip Technology. It integrates both transmitter and receiver functions using CMOS technology within a 20-pin Plastic Dual In-line Package (PDIP). The device operates on a single 5V supply with a typical current consumption of 7mA. It supports an extended industrial operating temperature range from -40°C to +85°C. The component features a standard microprocessor interface compatible with 6800-series systems, allowing direct connection for control and data exchange.

Telecom Feature Summary

• Integrates complete DTMF signal generation and decoding capabilities on a single chip
• Provides central office quality audio performance with low distortion
• Includes programmable guard time settings to prevent false tone detection
• Supports automatic tone burst mode for efficient signaling sequences

Telecom Applications

• Telephone handsets and keypads requiring DTMF input/output
• Public switched telephone network (PSTN) interface circuits
• Automated teller machines (ATMs) and payment terminals
• Telecommunications testing and measurement equipment

Telecom Procurement Notes

Verify the specific manufacturer source, as the MT8880 series was originally developed by Mitel and later acquired by Microchip. Confirm package authenticity and pinout compatibility with legacy designs. Check for RoHS compliance status if required for modern manufacturing standards. Ensure the suffix 'CE1' corresponds to the PDIP-20 variant in official datasheets.

Telecom Selection Notes

Select this component when a monolithic solution for both DTMF transmission and reception is required. It is suitable for designs needing direct microprocessor interfacing without external logic gates. Consider the PDIP-20 package for through-hole prototyping or applications where surface-mount options are not feasible. Verify voltage levels match the target system's 5V logic requirements.

Telecom Part Context

The MT8880 series represents a foundational class of telecom interface ICs used extensively in analog telephony. Originally introduced by Mitel, the product line continues under Microchip Technology following corporate acquisitions. The MT8880CE1 specifically denotes the commercial/industrial grade version in a dual-in-line package, serving as a direct replacement for older discrete DTMF implementations in legacy hardware maintenance.

Telecom Replacement Considerations

The MT8880CS1 serves as the surface-mount equivalent offering identical electrical characteristics in a SOIC-20 package. Other variants such as MT8880CE and MT8880CSR1 provide alternative packaging or reel options. Verify pin compatibility before substitution, as package dimensions differ significantly between DIP and SOIC formats.