Microchip Technology 25AA02E48T-I/OT Memory IC SOT-23-6 2 K 256 x 8 User Manuals

Table of Contents

• Device Selection Table

  1
• Features:

  1
• Description:

  1
• Pin Function Table

  1
• 1.0 Electrical Characteristics

  2
• Absolute Maximum Ratings(†)

  2
  • TABLE 1-1: DC Characteristics

    2
  • TABLE 1-2: AC Characteristics

    3
  • TABLE 1-3: AC Test Conditions

    4
  • FIGURE 1-1: Hold Timing

    5
  • FIGURE 1-2: Serial Input Timing

    5
  • FIGURE 1-3: Serial Output Timing

    5
• 2.0 Functional Description

  6
• 2.1 Principles of Operation

  6
• 2.2 Read Sequence

  6
• 2.3 Write Sequence

  6
• Block Diagram

  7
  • TABLE 2-1: Instruction set

    7
  • FIGURE 2-1: Read Sequence

    7
  • FIGURE 2-2: Byte Write Sequence

    8
  • FIGURE 2-3: Page Write Sequence

    8
• 2.4 Write Enable (WREN) and Write Disable (WRDI)

  9
  • FIGURE 2-4: Write Enable Sequence (WREN)

    9
  • FIGURE 2-5: Write Disable Sequence (WRDI)

    9
• 2.5 Read Status Register Instruction (RDSR)

  10
  • TABLE 2-2: Status Register

    10
  • FIGURE 2-6: Read Status Register Timing Sequence (RDSR)

    10
• 2.6 Write Status Register Instruction (WRSR)

  11
  • TABLE 2-3: Array Protection

    11
  • FIGURE 2-7: Write Status Register Timing Sequence (WRSR)

    11
• 2.7 Data Protection

  12
• 2.8 Power-On State

  12
  • TABLE 2-4: Write-Protect Functionality Matrix

    12
• 3.0 Pre-Programmed EUI-48™ or eui-64™ Node Address

  13
  • FIGURE 3-1: Memory Organization

    13
• 3.1 Factory-Programmed Write Protection

  13
• 3.2 EUI-48™ Node Address (25AA02E48)

  13
  • FIGURE 3-2: EUI-48 Node Address Physical Memory Map Example (25AA02E48)

    13
• 3.3 EUI-64™ Node Address (25AA02E64)

  14
  • FIGURE 3-3: EUI-64 Node Address Physical Memory Map Example (25AA02E64)

    14
• 4.0 PIN DESCRIPTIONS

  15
  • TABLE 4-1: Pin Function Table

    15
• 4.1 Chip Select (CS)

  15
• 4.2 Serial Output (SO)

  15
• 4.3 Write-Protect (WP)

  15
• 4.4 Serial Input (SI)

  15
• 4.5 Serial Clock (SCK)

  15
• 4.6 Hold (HOLD)

  15
• 5.0 Packaging Information

  16
• 5.1 Package Marking Information

  16
• Appendix A: REVISION HISTORY

  22
• The Microchip Web Site

  23
• Customer Change Notification Service

  23
• Customer Support

  23
• Reader Response

  24
• Product Identification System

  25
• Trademarks

  27
• Worldwide Sales

  28