ZHCSSR6B August   2023  – April 2024 THVD4431

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings [IEC]
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Power Dissipation
    7. 5.7  Electrical Characteristics
    8. 5.8  Switching Characteristics_RS-485_500kbps
    9. 5.9  Switching Characteristics_RS-485_20Mbps
    10. 5.10 Switching Characteristics, Driver_RS232
    11. 5.11 Switching Characteristics, Receiver_RS232
    12. 5.12 Switching Characteristics_MODE switching
    13. 5.13 Switching Characteristics_RS-485_Termination resistor
    14. 5.14 Switching Characteristics_Loopback mode
    15. 5.15 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Integrated IEC ESD and EFT Protection
      2. 7.3.2 Protection Features
      3. 7.3.3 RS-485 Receiver Fail-Safe Operation
      4. 7.3.4 Low-Power Shutdown Mode
      5. 7.3.5 On-chip Switchable Termination Resistor
      6. 7.3.6 Operational Data Rate
      7. 7.3.7 Diagnostic Loopback
      8. 7.3.8 Integrated Charge pump for RS-232
    4. 7.4 Device Functional Modes
      1. 7.4.1 RS-485 Functionality
      2. 7.4.2 RS-232 Functionality
      3. 7.4.3 Mode Control
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Data Rate and Bus Length for RS-485
        2. 8.2.1.2 Stub Length for RS-485 Network
        3. 8.2.1.3 Bus Loading for RS-485 Network
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 第三方米6体育平台手机版_好二三四免责声明
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5.12 Switching Characteristics_MODE switching

Parameters over recommended operating conditions. All typical values are at 25°C and supply voltage of VCC = 5 V , VIO = 3.3 V, unless otherwise noted. 
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tRDY Time from Shutdown to RS-232 ready MODE2, MODE1, MODE0 = 000 or floating; SHDN = GND to VIO; rest of logic input pins floating, VCC = 4.5 V to 5.5 V Time from 50% of rising SHDN to charge pump V- supply reaching -8 V; See Figure 6-11  0.05 0.1 ms
  MODE2, MODE1, MODE0 = 000 or floating; SHDN = GND to VIO; rest of logic input pins floating, VCC = 3 V to 3.6 V Time from 50% of rising SHDN to charge pump V- supply reaching -5 V; See Figure 6-11  0.1 0.4 ms
tR2_R4 Time to switch from RS-232 3T5R mode to RS-485 Full duplex mode L3 = Vio, MODE2 = GND, MODE1 from GND to Vio, MODE0 = Vio; SHDN = DIR = VIO; SLR, TERM_TX, TERM_RX= floating; Time from 50% of MODE1 rising edge to R2 reaching 2V; See Figure 6-12  0.04 0.1 µs
tR4_R2 Time to switch from RS-485 full dupplex mode to RS-232 3T5R mode L3 = Vio, MODE2 = GND, MODE1 from Vio to GND, MODE0 = Vio; SHDN = DIR = VIO; SLR, TERM_TX, TERM_RX= floating; Time from 50% of MODE1 falling edge to R2 reaching 300 mV; See Figure 6-12  2 2.1 µs
tLP_RS232 Time to switch from RS-232 loopback mode to normal RS-232 mode MODE2 = MODE1 = GND, MODE0 from GND to VIO; SHDN = VIO, L3 = GND; Time from 50% of MODE0 rising edge to L2 50% rising edge, -40 ℃ ≤ TA ≤ 85 ℃; See Figure 6-13  2 2.4 µs
tRS232_LP Time to switch from normal RS-232 mode to RS-232 loopback mode MODE2 = MODE1 = GND, MODE0 from VIO to GND; SHDN = VIO, L3 = GND; Time from 50% of MODE0 falling edge to L2 50% falling edge, -40 ℃ ≤ TA ≤ 85 ℃; See Figure 6-13  2 15 µs
tLP_RS485 Time to switch from RS-485 loopback mode to RS-485 full duplex mode MODE1 = MODE0 = VIO; MODE2 from VIO to GND; SHDN = VIO , SLR, TERM_TX, TERM_RX= floating; L3 = GND, Time from 50% of MODE2 falling edge to 50% of rising L2; See Figure 6-14  40 50 µs
tRS485_LP Time to switch from RS-485 full duplex mode to RS-485 loopback mode MODE1 = MODE0 = VIO; MODE2 from GND to VIO ; SHDN = VIO , SLR, TERM_TX, TERM_RX= floating; L3 = GND, Time from 50% of MODE2 rising edge to 50% of falling L2; See Figure 6-14  1 2 µs
tFHD_RS485 Time to switch from RS-485 full duplex to half duplex mode DIR= VIO, MODE2 = GND, MODE1 = VIO; MODE0 from VIO to GND ; SHDN = VIO , SLR, TERM_TX, TERM_RX= floating; L3= GND, 10k pull down resistor on L2, Time from 50% of MODE0 falling edge to 50% falling edge on L2; See Figure 6-15  0.5 1 µs
tHFD_RS485 Time to switch from RS-485 half duplex to full duplex mode DIR= VIO, MODE2 = GND, MODE1 = VIO; MODE0 from GND to VIO ; SHDN = VIO , SLR, TERM_TX, TERM_RX= floating; L3= GND, 10k pull down resistor on L2, Time from 50% of MODE0 rising edge to 50% rising edge on L2; See Figure 6-15  0.5 1 µs
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