Datasheet > 微控制器和处理器 > 计时器或实时时钟> DS3234S-

DS3234S-

更新时间： 2024-02-24 01:24:43

品牌	Logo	应用领域
美信 - MAXIM		晶体静态存储器
页数	文件大小	规格书
21页	292K
描述
Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM

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技术参数
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DS3234S- 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP, SOP20,.4	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	0.81	最大时钟频率：	0.032 MHz
外部数据总线宽度：		信息访问方法：	SERIAL, 4-WIRE/SPI
中断能力：	Y	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e3	长度：	12.8 mm
湿度敏感等级：	1	位数：	8
端子数量：	20	计时器数量：	1
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
封装等效代码：	SOP20,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	3.3 V	认证状态：	Not Qualified
座面最大高度：	2.65 mm	子类别：	Timer or RTC
最大供电电压：	5.5 V	最小供电电压：	2 V
标称供电电压：	3.3 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
最短时间：	SECONDS	处于峰值回流温度下的最长时间：	NOT SPECIFIED
易失性：	NO	宽度：	7.5 mm
uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK	Base Number Matches：	1

DS3234S- 数据手册

Rev 2; 10/08

Extremely Accurate SPI Bus RTC with

Integrated Crystal and SRAM

DS234

General Description

Features

♦ Accuracy 2ppm from 0°C to +40°C

The DS3234 is a low-cost, extremely accurate SPI™ bus

real-time clock (RTC) with an integrated temperature-com-

pensated crystal oscillator (TCXO) and crystal. The

DS3234 incorporates a precision, temperature-compen-

sated voltage reference and comparator circuit to monitor

♦ Accuracy 3.5ppm from -40°C to +85°C

♦ Battery Backup Input for Continuous

Timekeeping

♦ Operating Temperature Ranges

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

. When V

drops below the power-fail voltage (V ),

CC PF

the device asserts the RST output and also disables read

and write access to the part when V drops below both

♦ Low-Power Consumption

and V

. The RST pin is monitored as a pushbutton

BAT

♦ Real-Time Clock Counts Seconds, Minutes,

Hours, Day, Date, Month, and Year with Leap Year

Compensation Valid Up to 2099

input for generating a µP reset. The device switches to the

backup supply input and maintains accurate timekeeping

when main power to the device is interrupted. The integra-

tion of the crystal resonator enhances the long-term accu-

racy of the device as well as reduces the piece-part count

in a manufacturing line. The DS3234 is available in com-

mercial and industrial temperature ranges, and is offered

in an industry-standard 300-mil, 20-pin SO package.

♦ Two Time-of-Day Alarms

♦ Programmable Square-Wave Output

♦ 4MHz SPI Bus Supports Modes 1 and 3

♦ Digital Temp Sensor Output: 3°C Accuracy

♦ Register for Aging Trim

The DS3234 also integrates 256 bytes of battery-backed

SRAM. In the event of main power loss, the contents of

the memory are maintained by the power source con-

♦ RST Input/Output

♦ 300-Mil, 20-Pin SO Package

♦ Underwriters Laboratories (UL ) Recognized

nected to the V

pin. The RTC maintains seconds,

BAT

minutes, hours, day, date, month, and year information.

The date at the end of the month is automatically adjust-

ed for months with fewer than 31 days, including correc-

tions for leap year. The clock operates in either the

24-hour or 12-hour format with AM/PM indicator. Two

programmable time-of-day alarms and a programmable

square-wave output are provided. Address and data are

transferred serially by an SPI bidirectional bus.

Ordering Information

PIN-

PACKAGE

TOP

MARK

PART

TEMP RANGE

DS3234S#

0°C to +70°C

20 SO

DS3234S

DS3234SN#

-40°C to +85°C

DS3234SN

# Denotes a RoHS-compliant device that may include lead that

is exempt under the RoHS requirements. Lead finish is JESD97

Category e3, and is compatible with both lead-based and

lead-free soldering processes. A "#" anywhere on the top mark

denotes a RoHS-compliant device.

Applications

Utility Power Meters

GPS

Servers

Telematics

Pin Configuration

Typical Operating Circuit

TOP VIEW

N.C.

20 SCLK

19 DOUT

18 SCLK

17 DIN

SCLK

DIN

DOUT

RST

32kHz

SCLK

MOSI

MISO

RST

INT/SQW

32kHz

INT/SQW

RST

15 GND

BAT

DS3234

μP

N.C.

DS3234

N.C.

PUSH-

BUTTON

RESET

N.C.

13 N.C.

12 N.C.

11 N.C.

GND

N.C.

N.C. 10

SPI is a trademark of Motorola, Inc.

UL is a registered trademark of Underwriters Laboratories, Inc.

______________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...21

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与DS3234S-相关器件

型号	品牌	获取价格	描述	数据表
DS3234S#	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOP-2
DS3234S#T&R	MAXIM	获取价格	Real Time Clock, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOP-20
DS3234SN	MAXIM	获取价格	Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM
DS3234SN-	MAXIM	获取价格	Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM
DS3234SN#	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOP-2
DS3234SN#T&R	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOP-2
DS323PIN	ETC	获取价格	Analog IC
DS-323PIN	TE	获取价格	Flatpack Three-Way Power Divider 25 - 1000 MHz
DS-323-PIN	MACOM	获取价格	(non-RoHS) 3-Way
DS324	SPANSION	获取价格	32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 1.8 Volt-only, Simultaneous Operation Flash Mem

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