MT88L85AE1

Telecom Overview

The MT88L85AE1 is a single-channel Dual-Tone Multi-Frequency (DTMF) transceiver integrated circuit manufactured by Microchip Technology. Designed for telecommunications applications, this component supports both tone generation and detection functions within a unified package. It operates on a supply voltage range of 2.7V to 3.6V with a typical supply current of 3.1mA. The device is housed in a 24-pin Plastic Dual In-line Package (PDIP) with a 0.300-inch (7.62mm) body width. It is rated for an industrial operating temperature range from -40°C to +85°C.

Telecom Feature Summary

• Integrated DTMF transceiver functionality combining transmitter and receiver circuits in a single chip
• Supports standard telephone keypad tone generation and multi-tone decoding
• Compatible with low-voltage power supplies suitable for portable or battery-operated telecom equipment

Telecom Applications

• Telecommunications switching systems
• Public payphones and coin-operated telephones
• Automated attendant and voice response units

Telecom Procurement Notes

Verify the manufacturer origin carefully as the part has been associated with both Microsemi and Microchip Technology due to corporate acquisitions. Confirm the specific datasheet version and marking details to ensure compatibility with existing system designs. Check for any product discontinuance notifications or last-time buy notices from authorized distributors before finalizing procurement plans.

Telecom Selection Notes

Select the MT88L85AE1 when a combined DTMF transmit and receive solution is required in a through-hole DIP package. Ensure the design environment accommodates the specified 2.7V to 3.6V supply voltage range. Consider the 24-pin footprint and industrial temperature rating during PCB layout and thermal management planning for the target application.

Telecom Part Context

This component belongs to the MT88Lxx series of DTMF interface ICs, widely used in legacy and modern telecom infrastructure. The 'AE1' suffix typically denotes the specific package type and temperature grade variations within the family. These devices serve as critical interface elements between microprocessor-based control systems and analog telephone lines.

Telecom Replacement Considerations

Check for direct pin-compatible substitutes within the same MT88Lxx family, such as variants with different packaging options like surface-mount SOIC packages if board space permits. Verify functional equivalence regarding tone standards and decoding algorithms before substituting.