MT8888CS1

Telecom Overview

The MT8888CS1 is a CMOS Dual-Tone Multi-Frequency (DTMF) transceiver manufactured by Microchip Technology. It integrates both transmitter and receiver functions into a single chip, designed for central office quality signaling. The device operates on a single 5V supply with a voltage range of 4.75V to 5.25V and draws 7mA of operating current. It supports an industrial temperature range from -40°C to +85°C. The component is housed in a 20-lead SOIC package with a width of 7.50mm. It features a microprocessor interface for direct control and includes programmable guard times and automatic tone burst modes.

Telecom Feature Summary

• Integrates complete DTMF transmitter and receiver capabilities within a single CMOS chip
• Provides a flexible microprocessor port for direct system control and data exchange
• Supports adjustable guard time settings to ensure accurate tone detection
• Includes automatic tone burst mode functionality for standardized signaling sequences

Telecom Applications

• Telecommunications equipment requiring dual-tone multi-frequency signaling
• Central office telephone switching systems
• Microprocessor-based dialing and decoding interfaces

Telecom Procurement Notes

The MT8888CS1 is officially listed as obsolete or end-of-life by the manufacturer. Availability is restricted, and distributors may not stock this item in all regions. Verification of current lifecycle status and alternative sourcing options is required before design inclusion. Check official Microchip notifications for final discontinuation details.

Telecom Selection Notes

Select this component only if legacy compatibility with existing DTMF architectures is required. Ensure the design accommodates the 20-SOIC surface-mount package dimensions. Verify that the host microcontroller can interface directly with the provided parallel port structure. Consider modern alternatives if new designs do not have specific constraints necessitating this discontinued part number.

Telecom Part Context

This device belongs to the MT8888 family of DTMF transceivers produced by Microchip Technology. It serves as a specialized interface IC for telecom applications, bridging analog telephone lines with digital processing units. The CS1 suffix typically denotes the commercial temperature grade and SOIC packaging variant within the broader product line.

Telecom Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is marked obsolete, engineers must evaluate functional equivalents from other manufacturers or redesign using newer integrated solutions that support DTMF generation and detection.