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DS1087LU-266+T&R
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DS1087LU-266+T&R

Basic Information Overview

  • Category: Integrated Circuit
  • Use: Clock Generator
  • Characteristics: Low power consumption, high frequency accuracy
  • Package: T&R (Tape and Reel)
  • Essence: Programmable PLL Clock Generator
  • Packaging/Quantity: 2500 units per reel

Specifications and Parameters

  • Frequency Range: 1MHz to 200MHz
  • Supply Voltage: 2.7V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Output Type: LVCMOS
  • Output Frequency Accuracy: ±50ppm
  • Programmable Features: Output frequency, spread spectrum modulation, power-down mode

Detailed Pin Configuration

  1. VDD: Power supply voltage
  2. GND: Ground
  3. XIN: Crystal oscillator input
  4. XOUT: Crystal oscillator output
  5. SDA: Serial data input/output
  6. SCL: Serial clock input
  7. OE: Output enable
  8. CLKOUT: Clock output

Functional Characteristics

  • On-chip phase-locked loop (PLL) for frequency synthesis
  • Programmable output frequency with fine resolution
  • Spread spectrum modulation for reduced electromagnetic interference
  • Power-down mode for low power consumption during idle periods
  • I2C-compatible serial interface for easy configuration

Advantages and Disadvantages

Advantages: - Wide frequency range - High frequency accuracy - Low power consumption - Programmable features for flexibility - Reduced electromagnetic interference

Disadvantages: - Limited output types (only LVCMOS) - Requires external crystal oscillator

Applicable Range of Products

  • Communication equipment
  • Consumer electronics
  • Industrial automation systems
  • Medical devices
  • Automotive applications

Working Principles

The DS1087LU-266+T&R is a programmable PLL clock generator that uses an on-chip phase-locked loop to synthesize the desired output frequency. It takes an external crystal oscillator input and generates a stable clock signal with high accuracy. The output frequency can be programmed using the I2C-compatible serial interface, allowing for fine resolution adjustments. The device also supports spread spectrum modulation to reduce electromagnetic interference.

Detailed Application Field Plans

  1. Communication Equipment: The DS1087LU-266+T&R can be used in routers, switches, and network cards to generate accurate clock signals for data transmission.
  2. Consumer Electronics: This clock generator is suitable for use in televisions, set-top boxes, and audio/video equipment, ensuring precise timing for various functions.
  3. Industrial Automation Systems: It can be employed in PLCs (Programmable Logic Controllers), motor drives, and industrial control systems to synchronize operations and improve system performance.
  4. Medical Devices: The DS1087LU-266+T&R can provide reliable clock signals for medical imaging equipment, patient monitoring devices, and diagnostic instruments.
  5. Automotive Applications: It can be utilized in automotive infotainment systems, navigation units, and advanced driver-assistance systems (ADAS) to ensure accurate timing and synchronization.

Detailed Alternative Models

  1. DS1086LU-200+T&R: Similar to DS1087LU-266+T&R but with a lower frequency range of 1MHz to 100MHz.
  2. DS1088LU-400+T&R: Similar to DS1087LU-266+T&R but with a higher frequency range of 1MHz to 400MHz.
  3. DS1089LU-333+T&R: Similar to DS1087LU-266+T&R but with a higher frequency accuracy of ±10ppm.

5 Common Technical Questions and Answers

  1. Q: Can the output frequency be adjusted in real-time? A: Yes, the DS1087LU-266+T&R supports on-the-fly frequency adjustments through its serial interface.

  2. Q: Is an external crystal oscillator required for operation? A: Yes, the DS1087LU-266+T&R relies on an external crystal oscillator for generating the clock signal.

  3. Q: Can the spread spectrum modulation be disabled? A: Yes, the spread spectrum modulation feature can be enabled or disabled based on the application requirements.

  4. Q: What is the power consumption of the DS1087LU-266+T&R in power-down mode? A: In power-down mode, the device consumes very low power, typically less than 1μA.

  5. Q: Can the DS1087LU-266+T&R operate with a supply voltage below 2.7V? A: No, the DS1087LU-266+T&R requires a minimum supply voltage of 2.7V for proper operation.

This encyclopedia entry provides detailed information about the DS1087LU-266+T&R, including its