SNLS714 September   2022 DS320PR822

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 DC Electrical Characteristics
    6. 6.6 High Speed Electrical Characteristics
    7. 6.7 SMBUS/I2C Timing Charateristics
    8. 6.8 Typical Characteristics
    9. 6.9 Typical Jitter Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Linear Equalization
      2. 7.3.2 Flat-Gain
      3. 7.3.3 Receiver Detect State Machine
      4. 7.3.4 Cross Point
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active PCIe Mode
      2. 7.4.2 Active Buffer Mode
      3. 7.4.3 Standby Mode
    5. 7.5 Programming
      1. 7.5.1 Pin Mode
        1. 7.5.1.1 Five-Level Control Inputs
      2. 7.5.2 SMBUS/I2C Register Control Interface
        1. 7.5.2.1 Shared Registers
        2. 7.5.2.2 Channel Registers
      3. 7.5.3 SMBus/I 2 C Primary Mode Configuration (EEPROM Self Load)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 UPI x24 Lane Cross-Point Configuration
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
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6.7 SMBUS/I2C Timing Charateristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Secondary Mode
tSP Pulse width of spikes which must be
suppressed by the input filter		 50 ns
tHD-STA Hold time (repeated) START condition.
After this period, the first clock pulse is
generated		 0.6 µs
tLOW LOW period of the SCL clock 1.3 µs
THIGH HIGH period of the SCL clock 0.6 µs
tSU-STA Set-up time for a repeated START
condition		 0.6 µs
tHD-DAT Data hold time 0 µs
TSU-DAT Data setup time 0.1 µs
tr Rise time of both SDA and SCL signals Pull-up resistor = 4.7 kΩ, Cb = 10 pF 120 ns
tf Fall time of both SDA and SCL signals Pull-up resistor = 4.7 kΩ, Cb = 10 pF 2 ns
tSU-STO Set-up time for STOP condition 0.6 µs
tBUF Bus free time between a STOP and
START condition		 1.3 µs
tVD-DAT Data valid time 0.9 µs
tVD-ACK Data valid acknowledge time 0.9 µs
Cb Capacitive load for each bus line 400 pF
Primary Mode
fSCL-M SCL clock frequency 303 kHz
tLOW-M SCL low period 1.90 µs
THIGH-M SCL high period 1.40 µs
tSU-STA-M Set-up time for a repeated START
condition		 2 µs
tHD-STA-M Hold time (repeated) START condition.
After this period, the first clock pulse is
generated		 1.5 µs
TSU-DAT-M Data setup time 1.4 µs
tHD-DAT-M Data hold time 0.5 µs
tR-M Rise time of both SDA and SCL signals Pull-up resistor = 4.7 kΩ, Cb = 10 pF 120 ns
TF-M Fall time of both SDA and SCL signals Pull-up resistor = 4.7 kΩ, Cb = 10 pF 2 ns
tSU-STO-M Stop condition setup time 1.5 µs
EEPROM Timing
TEEPROM EEPROM configuration load time Time to assert ALL_DONE_N after READ_EN_N has been asserted. 7.5 ms
TPOR Time to first SMBus access Power supply stable after initial ramp. Includes initial power-on reset time. 50 ms
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