X9521V20I

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Potentiometer
• Characteristics: Programmable, Non-volatile, Serial Interface
• Package: 20-pin DIP (Dual Inline Package)
• Essence: X9521V20I is a digital potentiometer IC that allows for programmable resistance adjustment in electronic circuits.
• Packaging/Quantity: Available in reels of 1000 units.

Specifications

• Resolution: 256 taps
• Resistance Range: 10kΩ to 100kΩ
• Supply Voltage: 2.7V to 5.5V
• Interface: Serial Peripheral Interface (SPI)
• Operating Temperature: -40°C to +85°C

Detailed Pin Configuration

1. VCC: Power supply voltage
2. GND: Ground reference
3. CS: Chip select input
4. SCK: Serial clock input
5. SI: Serial data input
6. SO: Serial data output
7. WP: Write protect input
8. HIZ: High impedance terminal
9. A1: Terminal A1 for resistance adjustment
10. B1: Terminal B1 for resistance adjustment
11. W1: Wiper terminal for resistance adjustment
12. A2: Terminal A2 for resistance adjustment
13. B2: Terminal B2 for resistance adjustment
14. W2: Wiper terminal for resistance adjustment
15. NC: No connection
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection

Functional Features

• Programmable resistance adjustment with 256 discrete steps
• Non-volatile memory to retain settings even when power is disconnected
• Serial interface for easy integration with microcontrollers and other digital systems
• Low power consumption for energy-efficient applications
• High reliability and durability due to solid-state construction

Advantages and Disadvantages

Advantages

• Precise and accurate resistance adjustment
• Easy integration into digital circuits
• Non-volatile memory ensures settings are retained
• Wide operating temperature range allows for versatile applications
• Compact package size for space-constrained designs

Disadvantages

• Limited resistance range compared to traditional potentiometers
• Requires a microcontroller or digital system for control

Working Principles

The X9521V20I digital potentiometer operates by using an internal array of resistive elements. The resistance between the wiper terminal (W1 or W2) and either terminal A1/A2 or B1/B2 can be adjusted digitally through the serial interface. The resistance value is determined by the position of the wiper within the array.

Detailed Application Field Plans

The X9521V20I digital potentiometer finds applications in various fields, including:

1. Audio Equipment: Volume control, tone adjustment
2. Industrial Automation: Calibration, signal conditioning
3. Test and Measurement Instruments: Gain control, offset adjustment
4. Communication Systems: Signal attenuation, impedance matching
5. Automotive Electronics: Climate control, sensor calibration

Detailed and Complete Alternative Models

1. X9521V10I: 10-pin version with similar specifications
2. X9521V50I: 50-pin version with extended resistance range
3. X9521V20C: Surface-mount package variant

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