Datasheet > DS2404S-001

DS2404S-001

更新时间： 2024-01-16 23:53:02

品牌	Logo	应用领域
达拉斯 - DALLAS		光电二极管外围集成电路
页数	文件大小	规格书
28页	659K
描述
Real Time Clock, 0 Timer(s), CMOS, PDSO16,

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技术参数
数据手册

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DS2404S-001 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 数据手册

DS2404

DETAILED PIN DESCRIPTION

SYMBOL

DESCRIPTION

1,16

V_CC

Power input pins for V_CCoperate mode. 2.8 to 5.5 volts operation.

Either pin can be used for V_CC. Only one is required for normal

operation. (See V_BATOpin description and “Power Control” section).

Interrupt output pin: Open drain.

IRQ

Reset input pin for 3-wire operation. (See “Parasite Power” section.)

Data input/output pin for 3-wire operation.

Data input/output for 1-Wire operation: Open drain. (See “Parasite

Power” section.)

RST

I/O

CLK

GND

V_BATB

Clock input pin for 3-wire operation.

No connection pins.

7,12

8,13

Ground pin: Either pin can be used for ground.

Battery backup input pin: Battery voltage can be 2.8 to 5.5 volts.

(See V_BATOpin description and “Power Control” section.)

Battery operate input pin for 2.8 to 5.5 volt operation. The V_CC&

V_BATBpins must be grounded when this pin is used to power the chip.

(See “Power Control” section.)

V_BATO

1Hz

1 Hz square wave output: Open drain.

14,15

X₁,X₂

Crystal pins. Connections for a standard 32.768 kHz quartz crystal,

EPSON part number C-002RX or C-004R (be sure to request 6 pF

load capacitance).

NOTE: X1 and X2 are very high impedance nodes. It is

recommended that they and the crystal be guard-ringed with ground

and that high frequency signals be kept away from the crystal area.

See Figure 18 and Application Note 58 for details.

OVERVIEW

The DS2404 has four main data components: 1) 64-bit lasered ROM, 2) 256-bit scratchpad, 3) 4096-bit

SRAM, and 4) timekeeping registers. The timekeeping section utilizes an on-chip oscillator that is

connected to an external 32.768 kHz crystal. The SRAM and timekeeping registers reside in one

contiguous address space referred to hereafter as memory. All data is read and written least significant bit

first.

Two communication ports are provided, a 1-Wire port and a 3-wire port. A port selector determines

which of the two ports is being used. The communication ports and the ROM are parasite-powered via

I/O, RST , or V_CC. This allows the ROM to be read in the absence of power. The ROM data is accessible

only through the 1-Wire port. The scratchpad and memory are accessible via either port.

If the 3-wire port is used, the master provides one of four memory function commands: 1) read memory,

2) read scratchpad, 3) write scratchpad, or 4) copy scratchpad. The only way to write memory is to first

write the scratchpad and then copy the scratchpad data to memory. (See Figure 6.)

If the 1-Wire port is used, the memory functions will not be available until the ROM function protocol

has been established. This protocol is described in the ROM functions flow chart (Figure 9). The master

must first provide one of five ROM function commands: 1) read ROM, 2) match ROM, 3) search ROM,

4) skip ROM or 5) search interrupt. After a ROM function sequence has been successfully executed, the

memory functions are accessible and the master may then provide any one of the four memory function

commands (Figure 6.)

2 of 28

020998

123 4 5 6 7...28

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与DS2404S-001相关器件

型号	品牌	描述	获取价格	数据表
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
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

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