MT8889CSR1

Telecom Overview

The MT8889CSR1 is a dual-tone multi-frequency (DTMF) transceiver integrated circuit manufactured by Microchip Technology. Designed for telecommunications applications, it integrates both transmitter and receiver functions within a single package. The device operates on a supply voltage ranging from 4.75 V to 5.25 V with a typical operating current of 7 mA. It supports an extended industrial temperature range from -40°C to +85°C. The component is housed in a 20-SOIC surface-mount package with a width of 7.50 mm. It features a microprocessor interface for control and data exchange.

Telecom Feature Summary

• Integrates complete DTMF transmitter and receiver capabilities for central office quality performance
• Includes a dedicated microprocessor port for simplified system integration and control
• Supports adjustable guard time settings to ensure accurate tone detection
• Features automatic tone burst mode operation for standardized signaling

Telecom Applications

• Telecommunications equipment requiring DTMF signaling
• Central office telephone interfaces
• Embedded systems with microprocessor-controlled telephony functions

Telecom Procurement Notes

Verify the specific suffix 'CSR1' against official Microchip documentation to confirm pinout and electrical characteristics match your design requirements. Check for product discontinuance notifications or end-of-life status before finalizing procurement plans. Ensure compatibility with existing inventory if replacing older variants.

Telecom Selection Notes

Select this component when a combined DTMF transmit and receive solution is required in a compact surface-mount form factor. Consider the 20-SOIC package constraints and the 5V logic level compatibility. Evaluate power consumption requirements against the 7 mA operating current specification.

Telecom Part Context

This part belongs to the MT8880/MT8889 family of DTMF transceivers. It serves as a specialized interface IC for handling dual-tone multi-frequency signaling in voice communication systems. The device simplifies design by integrating analog front-end and digital control logic into one unit.

Telecom Replacement Considerations

Consult Microchip technical support for verified cross-reference parts. Verify that any substitute maintains identical pin configuration and electrical parameters to avoid board redesign.