MT88L70AN1

Telecom Overview

The MT88L70AN1 is a DTMF receiver integrated circuit manufactured by Microchip Technology, designed for telecommunications interface applications. It operates within a supply voltage range of 2.7V to 3.6V and draws a typical supply current of 2mA. The device functions as a single-channel DTMF receiver and supports an operating temperature range from -40°C to +85°C. It is housed in a 18-SOIC package with a width of 7.50mm (0.295 inches). The component complies with RoHS3 standards and has an MSL rating of 3 (168 hours).

Telecom Feature Summary

• DTMF Receiver Functionality: Dedicated hardware implementation for Dual-Tone Multi-Frequency signal detection.
• Low Power Consumption: Optimized for battery-operated or power-sensitive telecom equipment with low supply current.
• Wide Operating Voltage: Compatible with standard 3.3V logic systems via a 2.7V to 3.6V supply range.

Telecom Applications

• Telecommunications Interface Systems
• Voice Recognition Modules
• Public Switched Telephone Network (PSTN) Equipment

Telecom Procurement Notes

Verify the specific suffix 'AN1' against official Microchip documentation to confirm pinout and marking variations compared to similar variants like 'ASR1'. Confirm end-of-life status and last-time-buy dates through authorized distributors, as this component may be discontinued. Ensure compatibility with existing PCB footprints for the 18-SOIC package during procurement planning.

Telecom Selection Notes

Select the MT88L70AN1 when a dedicated hardware solution for DTMF decoding is required to reduce microcontroller load. Compare against software-based decoding solutions if cost or pin count is critical. Verify that the 18-SOIC package size fits the mechanical constraints of the target enclosure. Ensure the operating environment stays within the specified -40°C to +85°C temperature range.

Telecom Part Context

This component belongs to the MT88L70 family of DTMF receivers from Microchip Technology. It serves as a specialized interface chip for converting dual-tone multi-frequency signals into digital data for further processing. The family includes various packaging options such as SOIC and SSOP, catering to different assembly requirements in legacy and modern telecom designs.

Telecom Replacement Considerations

Check for direct pin-to-pin replacements within the same MT88L70 series, such as MT88L70ASR1, ensuring functional equivalence. Verify if newer generations of DTMF receivers offer improved noise immunity or lower power consumption while maintaining compatible interfaces.