The term **1663** in the context of electronic components most commonly refers to a specific integrated circuit (IC) or a standard surface-mount device (SMD) package size. --- ### 1. The MAX1663 (Logic/Voltage Level Shifter) The most prominent electronic component with this designation is the **MAX1663** manufactured by Maxim Integrated (now Analog Devices). It is a specialized IC used for communication interfaces. | Feature | Specification | | :--- | :--- | | **Component Type** | SMBus-Compatible Level Shifter | | **Main Function** | Translates logic levels between different voltage rails | | **Channels** | 2-Channel (typically for Clock and Data lines) | | **Common Application** | Interfacing a 3V microcontroller with 5V peripherals | | **Package Types** | QSOP-16, SOIC-16 | #### Key Technical Details: * **Bidirectional:** It allows data to flow in both directions on the bus. * **Protection:** Often includes ESD protection to safeguard delicate internal logic from static spikes. * **Isolation:** Used to isolate power segments in battery-powered devices to save energy. --- ### 2. The 1663 Metric Package Size (SMD) In the world of passive components (Resistors, Capacitors, Inductors), **1663** refers to the physical dimensions of the component in the **Metric System**. | Measurement | Dimension (mm) | Dimension (Inches) | | :--- | :--- | :--- | | **Length** | 1.6 mm | 0.063 in | | **Width** | 0.63 mm | 0.024 in | | **Standard Name** | 1608 (Metric) | 0603 (Imperial) | > **Note:** While the metric label is technically 1608, some specialized manufacturers or older datasheets may refer to specific variations as "1663" to denote high-precision tolerances or specific height profiles. --- ### 3. Other Potential "1663" Variants Depending on the manufacturer prefix, 1663 can refer to different specialized parts: * **BZX84-C16 / 1663:** Sometimes used as a shorthand code for certain 16V Zener Diodes. * **NTC Thermistors:** Certain 1.6k Ohm thermistors used for temperature sensing may carry "1663" as a part of their industrial identification code. --- ### Typical Usage Code Example If you are using a level shifter like the MAX1663 in a circuit design (e.g., in Verilog or for a PCB Netlist), it might look like this: ```markdown Component: U1 Part Number: MAX1663EAP Description: SMBus Level Translator Pins: 1: VCC (3.3V) 2: GND 3: SDA_IN (Low Voltage) 4: SDA_OUT (High Voltage) ```