MT8880CSR1

Telecom Overview

The MT8880CSR1 is an integrated Dual-Tone Multi-Frequency (DTMF) transceiver manufactured by Microchip Technology. It combines complete DTMF transmitter and receiver functions within a single unit, designed for central office quality performance. The device operates on a single 5V supply with a minimum voltage of 4.75V and a maximum of 5.25V, drawing a typical operating current of 7mA. It supports a wide industrial temperature range from -40°C to +85°C. The component is housed in a 20-SOIC surface-mount package with a width of 7.50mm. It features adjustable guard times, automatic tone burst mode, and a standard microprocessor interface compatible with 6800 series systems.

Telecom Feature Summary

• Integrates both DTMF transmission and reception capabilities into a single chip for simplified system design.
• Provides low power consumption suitable for battery-operated or energy-efficient telecommunications equipment.
• Includes an automatic tone burst mode to streamline the signaling process during call setup.
• Features an adjustable guard time to ensure accurate detection of dual-tone signals amidst noise.

Telecom Applications

• Telephone handsets requiring dual-tone multi-frequency signaling.
• Public switched telephone network (PSTN) interfaces.
• Automated teller machines (ATMs) and payment terminals.

Telecom Procurement Notes

Verify component authenticity through authorized channels as the MT8880CSR1 is listed as obsolete. Check for moisture sensitivity level (MSL 3) requirements if storage conditions have been uncontrolled. Confirm that the specific suffix 'CSR1' matches the required packaging and marking specifications for your assembly line. Review the latest Product Change Notification (PCN) documents for any manufacturing origin changes.

Telecom Selection Notes

Select this component when a combined DTMF send/receive solution is needed to reduce board space. Ensure the host microcontroller can interface with the provided standard bus. Verify that the 20-SOIC footprint fits the PCB layout constraints. Consider the -40°C to +85°C rating against the environmental conditions of the final application.

Telecom Part Context

This part belongs to the MT8880 family of DTMF transceivers. It is functionally similar to other variants like the MT8888CS1 but may differ in packaging or specific suffix designations. The base MT8880 architecture is widely used in legacy telecom systems. Engineers should consult the specific datasheet for pin compatibility with related parts in the same series.

Telecom Replacement Considerations

The MT8888CS1 is a related part in the same product family. Verify pin-to-pin compatibility and electrical specifications before substitution. Other generic DTMF transceivers may require significant circuit redesign due to different control logic or interface standards.