The **AI-2604-TT-R** is a specialized audio component, specifically an **Audio Indicator (Buzzer)** manufactured by **PUI Audio, Inc.** This part is designed to provide audible feedback in electronic circuits through a piezoelectric mechanism. Below is a detailed breakdown of its specifications and electronic characteristics. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical parameters of the device: | Parameter | Specification | | :--- | :--- | | **Type** | Audio Indicator (Internal Drive) | | **Technology** | Piezoelectric | | **Operating Voltage Range** | 3V ~ 20V DC | | **Rated Voltage** | 12V DC | | **Current Consumption** | 8mA (at rated voltage) | | **Sound Pressure Level (SPL)** | 85 dBA @ 10cm | | **Resonant Frequency** | 4,000 Hz (± 500 Hz) | | **Tone Type** | Continuous | | **Mounting Type** | Through Hole (PC Pins) | | **Operating Temperature** | -20°C to +70°C | --- ### 2. Key Electronic Features #### A. Internal Drive Circuit Unlike a "transducer" which requires an external oscillating signal (like a PWM square wave), the AI-2604-TT-R features an **internal drive circuit**. * **Operation:** You simply apply a DC voltage within the 3-20V range, and the device will produce a constant tone automatically. * **Benefit:** It simplifies PCB design by removing the need for an external oscillator or complex software coding. #### B. Piezoelectric Construction The part uses a ceramic piezoelectric element. When voltage is applied, the material physically deforms, creating pressure waves in the air. * **Efficiency:** Piezo indicators consume significantly less power (8mA) compared to electromagnetic buzzers. * **EMI:** It generates very little electromagnetic interference, making it ideal for sensitive medical or communication equipment. #### C. Physical Form Factor * **Housing:** The "R" in the suffix typically denotes RoHS compliance. * **Dimensions:** It usually features a cylindrical plastic housing with two pins spaced for standard PCB mounting. --- ### 3. Typical Applications Because of its wide voltage range and low current draw, it is commonly found in: * **Industrial Controls:** Error alerts or status confirmation. * **Medical Devices:** Patient monitoring alarms. * **Consumer Electronics:** Microwave timers, washing machine end-of-cycle alerts. * **Security Systems:** Keypad entry confirmation or low-battery warnings. ---