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Rochester Electronics MC145484SD Environmental and export classification status description

The Freescale Semiconductor MC145484SD is a dual-tone multi-frequency (DTMF) transceiver integrated circuit. It is commonly used for telecommunication applications due to its ability to encode and decode dual-tone signals, enabling reliable and efficient communication over analog telephone lines. Functions of Freescale Semiconductor MC145484SD: 1. DTMF Encoding: The IC can encode keypresses on a telephone keypad into DTMF signals. 2. DTMF Decoding: It can decode incoming DTMF signals into numerical outputs. 3. Signal Filtering: The IC includes filters to help in separating DTMF tones from other signals. 4. Audio Interface: Provides the necessary audio interfaces for communication with microcontrollers or other external systems. Applications of Freescale Semiconductor MC145484SD: 1. Telephone systems: Used in landline and certain mobile phones for DTMF signal processing. 2. Automated systems: Integrated into automated response systems like interactive voice response (IVR) systems. 3. Security Systems: Employed in security systems for remote access and control functionalities. Alternative Components: - Holtek HT9200A - Silicon Labs Si3050 - Texas Instruments TCM5087 Embedded Modules: - DTMF Generation Module - DTMF Detection Module Related Q&A: 1. Q: How does the Freescale MC145484SD encode DTMF tones? A: The MC145484SD uses a combination of filters and tone generators to convert keypad presses into DTMF signals. 2. Q: Can the MC145484SD decode multiple DTMF signals simultaneously? A: Yes, the MC145484SD can decode multiple DTMF tones at the same time. 3. Q: What are the typical voltage requirements for the MC145484SD? A: The MC145484SD typically operates at voltages in the range of 2.7V to 5.5V. 4. Q: In what types of telecommunication systems is the MC145484SD commonly used? A: The MC145484SD is commonly found in landline phones, security systems, and various automated communication systems. 5. Q: Are there any specific programming considerations when integrating the MC145484SD into a project? A: Integration typically involves configuring the IC through its control pins and interfacing it with a microcontroller for data exchange. Freescale provides detailed programming guidelines in the IC's datasheet.