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参数资料
| 型号： | DS2411R+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC SILICON SERIAL NUMBER SOT-23 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 硅序列号 |
| 应用： | PCB，网络节点，设备识别/注册 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 1429 (CN2011-ZH PDF) |
| 其它名称： | DS2411R+DKR |
DS2411
4 of 12
Note 9:
The earliest recognition of a negative edge is possible at tREH after VTH has been reached
on the previous edge.
Note 10:
Interval during the negative edge on I/O at the beginning of a presence-detect pulse
between the time at which the voltage is 90% of VPUP and the time at which the voltage is
10% of VPUP.
Note 11:
ε
in Figure 7 represents the time required for the pullup circuitry to pull the voltage on I/O
up VIL to VTH. The actual maximum duration for the master to pull the line low is tW1LMAX
+ tF - ε and tW0LMAX + tF - ε, respectively.
Note 12:
δ
in Figure 7 represents the time required for the pullup circuitry to pull the voltage on I/O
up from VIL to the input-high threshold of the bus master. The actual maximum duration
for the master to pull the line low is tRLMAX + tF.
Note 13:
Interval begins when the voltage drops below VTL during a negative edge on I/O and ends
when the voltage rises above VTH during a positive edge on I/O.
OPERATION
The DS2411’s registration number is accessed through a single data line. The 48-bit serial number, 8-bit
family code, and 8-bit CRC are retrieved using the Maxim 1-Wire protocol. This protocol defines bus
transactions in terms of the bus state during specified time slots that are bus-master-generated falling
edges on the I/O pin. All data is read and written least significant bit first. The device requires a delay
between VCC power-up and initial 1-Wire communication, tPWRP (1200s). During this time the device
may issue presence-detect pulses.
1-Wire BUS SYSTEM
The 1-Wire bus has a single bus master and one or more slaves. In all instances, the DS2411 is a slave
device. The bus master is typically a microcontroller. The discussion of this bus system is broken down
into three topics: hardware configuration, transaction sequence, and 1-Wire signaling (signal type and
timing).
Hardware Configuration
The 1-Wire bus has a single data line, I/O. It is important that each device on the bus be able to drive I/O
at the appropriate time. To facilitate this, each device has an open-drain or three-state output. The
DS2411 has an open-drain output with an internal circuit equivalent to that shown in Figure 3. The bus
master can have the same equivalent circuit. If a bidirectional pin is not available on the master, separate
output and input pins can be connected together. The bus requires a pullup resistor at the master end of
the bus, as shown in Figure 4. A multidrop bus consists of a 1-Wire bus with multiple slaves attached.
The 1-Wire bus has a maximum data rate of 15.4kbps in standard speed and 125kbps in overdrive.
The idle state for the 1-Wire bus is high. If a transaction needs to be suspended for any reason, I/O must
remain high if the transaction is to be resumed. If the bus is pulled low, slave devices on the bus will
interpret the low as either a timeslot, or a reset depending on the duration.
Figure 1. DS2411 REGISTRATION NUMBER
MSB
LSB
8-BIT CRC CODE
48-BIT SERIAL NUMBER
8-BIT FAMILY CODE
(01h)
MSB
LSB MSB
LSB
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2411R-U | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS2411X | 功能描述:序列号注册 Silicon Serial Number w/Vcc Input RoHS:否 制造商:Maxim Integrated 数据总线宽度: 电源电压-最大: 电源电压-最小: 最大工作温度: 最小工作温度: 安装风格: 封装 / 箱体: |
| DS2411X#U | 功能描述:序列号注册 Silicon Serial Number w/Vcc Input RoHS:否 制造商:Maxim Integrated 数据总线宽度: 电源电压-最大: 电源电压-最小: 最大工作温度: 最小工作温度: 安装风格: 封装 / 箱体: |
| DS2413 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire Dual Channel Addressable Switch |
| DS2413_08 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire Dual Channel Addressable Switch |
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