Datasheet > DS2404S-001+T&R

DS2404S-001+T&R

更新时间： 2024-01-18 12:57:30

品牌	Logo	应用领域
美信 - MAXIM		时钟光电二极管外围集成电路
页数	文件大小	规格书
29页	1508K
描述
Real Time Clock, 0 Timer(s), CMOS, PDSO16, 0.300 INCH, ROHS COMPLIANT, SOIC-16

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

DS2404S-001+T&R 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP,	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.72
最大时钟频率：	0.032 MHz	信息访问方法：	SERIAL, 3-WIRE
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e3
长度：	10.3 mm	湿度敏感等级：	1
端子数量：	16	计时器数量：
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	2.65 mm	最大供电电压：	5.5 V
最小供电电压：	4.5 V	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	7.5 mm	uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK
Base Number Matches：	1

DS2404S-001+T&R 数据手册

DS2404

Port selection is accomplished on a first-come, first-serve basis. Whichever port comes out of reset first

will obtain control. For the 3-wire port, this is done by bringing RST high. For the 1-Wire port, this is

done on the first falling edge of I/O after the reset and presence pulses. (See “1-Wire Signaling” section.)

More information on how to arbitrate port access is found in section “Device Operation Modes” later in

this document.

PARASITE POWER

The block diagram (Figure 1) shows the parasite-powered circuitry. This circuitry “steals” power

whenever the I/O, RST , or V_CCpins are high. When using the 1-Wire port in battery operate mode,

RST and V_CCprovide no power since they are low. However, I/O will provide sufficient power as long as

the specified timing and voltage requirements are met. The advantages of parasite power are two-fold:

1) by parasiting off these pins, battery power is conserved and 2) the ROM may be read in absence of

normal power. For instance, in battery-operate mode, if the battery fails, the ROM may still be read

normally.

In battery-backed mode, if V_CCfails, the port switches in the battery but inhibits communication. The

ROM may still be read normally over the 1-Wire port if RST is low.

64-BIT LASERED ROM

Each DS2404 contains a unique ROM code that is 64 bits long. The first eight bits are a 1-Wire family

code (DS2404 code is 04h). The next 48 bits are a unique serial number. The last eight bits are a CRC of

the first 56 bits. (See Figure 2.)

The 1-Wire CRC is generated using a polynomial generator consisting of a shift register and XOR gates

as shown in Figure 3. The polynomial is X⁸+ X⁵+ X⁴+ 1. Additional information about the Dallas

1-Wire Cyclic Redundancy Check is available in Application Note 27, “Understanding and Using Cyclic

Redundancy Checks with Dallas Semiconductor iButton Products”.

The shift register bits are initialized to zero. Then starting with the least significant bit of the family code,

one bit at a time is shifted in. After the 8th bit of the family code has been entered, then the serial number

is entered. After the 48th bit of the serial number has been entered, the shift register contains the CRC

value. Shifting in the eight bits of CRC should return the shift register to all zeros.

64-BIT LASERED ROM Figure 2

CRC

SERIAL NUMBER

DS2404 FAMILY CODE

04h

8 BITS

48-BIT UNQUE NUMBER

MSB

LSB

1-WIRE CRC CODE Figure 3

4 of 29

1 2 345 6 7...29

下载PDF

与DS2404S-001+T&R相关器件

型号	品牌	描述	获取价格	数据表
DS2404S-C01	DALLAS	Dual Port Memory Plus Time	获取价格
DS2405	DALLAS	Addressable Switch	获取价格
DS2405/R	DALLAS	Addressable Switch	获取价格
DS2405/T	DALLAS	Addressable Switch	获取价格
DS2405/T&R	DALLAS	Addressable Switch	获取价格
DS2405/TR	ETC	Peripheral IC	获取价格

与DS2404S-001+T&R相关文章

STM32F030C6芯片介绍：主要参数分析、引脚配置说明、功耗及封装
2024-05-11

10
PCF8591数据手册解读：参数、引脚说明
2024-05-11

16
一文带你了解ss8050参数、引脚配置、应用指南
2024-05-11

7
深入解析AD7606高性能多通道模数转换器：资料手册参数分析
2024-05-10

10

产品中心

服务支持

精选活动

关于我们

帮助中心

DS2404S-001+T&R

DS2404S-001+T&R 技术参数

DS2404S-001+T&R 数据手册

与DS2404S-001+T&R相关器件

与DS2404S-001+T&R相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

DS2404S-001+T&R

DS2404S-001+T&R 技术参数

DS2404S-001+T&R 数据手册

与DS2404S-001+T&R相关器件

与DS2404S-001+T&R相关文章

您还可以找

您在本页遇到什么问题？