Datasheet > 微控制器和处理器 > 计时器或实时时钟> DS2404B

DS2404B

更新时间： 2024-01-27 18:21:18

品牌	Logo	应用领域
达拉斯 - DALLAS		计时器或实时时钟微控制器和处理器外围集成电路光电二极管
页数	文件大小	规格书
28页	664K
描述
EconoRAM Time Chip

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

DS2404B 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	0.300 INCH, SOIC-16	针数：	16
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.8
其他特性：	1 HZ FIXED O/P; 64-BIT LASERED ROM; TIMEKEEPING CURRENT = 350NA	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：	e0	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）：	240
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：	Tin/Lead (Sn/Pb)	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

DS2404B 数据手册

DS2404

Setting a write protect bit to a logic 1 will permanently write protect the corresponding counter and alarm

registers, all write protect bits, and additional bits in the control register. The write protect bits can not be

written in a normal manner (see “Write Protect/Programmable Expiration” section).

RO Read Only

If a programmable expiration occurs and the read only bit is set to a logic 1, then the DS2404 becomes

read only. If a programmable expiration occurs and the read only bit is a logic 0, then only the 64-bit

lasered ROM can be accessed (see “Write Protect/Programmable Expiration” section).

OSC Oscillator enable

This bit controls the crystal oscillator. When set to a logic 1, the oscillator will start operation. When the

oscillator bit is a logic 0, the oscillator will stop.

AUTO/ MAN

Automatic/ Manual Mode

When this bit is set to a logic 1, the interval timer is in automatic mode. In this mode, the interval timer is

enabled by the I/O line. When this bit is set to a logic 0, the interval timer is in manual mode. In this

mode the interval timer is enabled by the STOP/START bit.

Stop/Start (in Manual Mode)

STOP/START

If the interval timer is in manual mode, the interval timer will start counting when this bit is set to a logic

0 and will stop counting when set to a logic 1. If the interval timer is in automatic mode, this bit has no

effect.

DSEL Delay Select Bit

This bit selects the delay that it takes for the cycle counter and the interval timer (in auto mode) to see a

transition on the I/O line. When this bit is set to a logic 1, the delay time is 123 + 2 ms. This delay allows

communication on the I/O line without starting or stopping the interval timer and without incrementing

the cycle counter. When this bit is set to a logic 0, the delay time is 3.5 ±0.5 ms.

MEMORY FUNCTION COMMANDS

The “Memory Function Flow Chart” (Figure 6) describes the protocols necessary for accessing the

memory. Two examples follow the flowchart. Three address registers are provided as shown in Figure 5.

The first two registers represent a 16-bit target address (TA1, TA2). The third register is the ending

offset/data status byte (E/S).

The target address points to a unique byte location in memory. The first five bits of the target address

(T4:T0) represent the byte offset within a page. This byte offset points to one of 32 possible byte

locations within a given page. For instance, 00000b points to the first byte of a page where as 11111b

would point to the last byte of a page.

8 of 28

020998

1...5 6 789 10 11...28

下载PDF

与DS2404B相关器件

型号	品牌	描述	获取价格	数据表
DS2404B/T&R	DALLAS	Analog Waveform Generation Function, CMOS, PDSO16,	获取价格
DS2404B+T&R	MAXIM	Real Time Clock, 0 Timer(s), CMOS, PDSO16, 0.208 INCH, ROHS COMPLIANT, SSOP-16	获取价格
DS2404S	DALLAS	EconoRAM Time Chip	获取价格
DS2404S-001	DALLAS	Real Time Clock, 0 Timer(s), CMOS, PDSO16,	获取价格
DS2404S-001+	MAXIM	Real Time Clock, 0 Timer(s), CMOS, PDSO16, 0.300 INCH, ROHS COMPLIANT, SOIC-16	获取价格
DS2404S-001+T&R	MAXIM	Real Time Clock, 0 Timer(s), CMOS, PDSO16, 0.300 INCH, ROHS COMPLIANT, SOIC-16	获取价格

与DS2404B相关文章

资料手册解读：UC3842参数和管脚说明
2024-05-22

3
一文带你了解无源晶振的负载电容为何要加两颗谐振电容CL1和CL2
2024-05-22

4
玻璃管保险丝与陶瓷管保险丝：区别与替代性探讨
2024-05-22

3
PCF8574资料解读：主要参数分析、引脚说明
2024-05-21

15

产品中心

服务支持

精选活动

关于我们

帮助中心

DS2404B

DS2404B 技术参数

DS2404B 数据手册

与DS2404B相关器件

与DS2404B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

DS2404B

DS2404B 技术参数

DS2404B 数据手册

与DS2404B相关器件

与DS2404B相关文章

您还可以找

您在本页遇到什么问题？