Datasheet > DS32B35_10

DS32B35_10

更新时间： 2024-02-07 01:13:46

品牌	Logo	应用领域
美信 - MAXIM		晶体石英晶振温度补偿晶振
页数	文件大小	规格书
22页	401K
描述
Accurate I2C RTC with Integrated TCXO/Crystal/FRAM

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DS32B35_10 数据手册

19-5340; Rev 3; 7/10

Accurate I C RTC with Integrated

TCXO/Crystal/FRAM

B/DS2C35

General Description

Features

♦ Integrated 32.768kHz Crystal

♦ Fast (400kHz) I²C Interface

The DS32B35/DS32C35 accurate real-time clocks

(RTC) are clock/calendars that include an integrated

temperature-compensated crystal oscillator (TCXO),

crystal, and a bank of nonvolatile memory (FRAM) in a

single package. The nonvolatile memory is available in

two densities: 2048 x 8 and 8192 x 8 bits. The integra-

tion of the crystal resonator enhances the long-term

accuracy of the devices as well as reduces the piece

part count in a manufacturing line. The devices operate

♦ RTC Counts Seconds, Minutes, Hours, Day, Date,

Month, and Year with Leap Year Compensation

Valid Up to 2100

♦ RTC Accuracy 2ppm from 0°C to +40°C

♦ RTC Accuracy 3.5ppm from -40°C to 0°C and

+40°C to +85°C

♦ Nonvolatile Memory with 10 Years of Guaranteed

as a slave device on an I C serial interface, and are

Backup Time and Write Protection

available in both commercial and industrial temperature

ranges in a 300-mil, 20-pin SO package.

♦ Two Available Densities of Nonvolatile Memory

2048 Bytes (DS32B35)

8192 Bytes (DS32C35)

The clock/date provides seconds, minutes, hours, day,

date, month, and year information. The date at the end

of the month is automatically adjusted for months with

fewer than 31 days, including corrections for leap year.

♦ No Cycle Limitations on Memory

♦ Power-Switching Circuit Selects Between Main

Power and Battery Backup for the RTC

♦ Programmable Square Wave with Frequency of

The DS32B35/DS32C35 include a bank of nonvolatile

memory that does not require a backup energy source

to maintain memory contents. In addition, there are no

read or write cycle limitations. The memory array can

be accessed at maximum cycle rates for the life of the

product with no wear-out mechanisms.

32.768kHz, 8.192kHz, 4.096kHz, or 1Hz

♦ Two Time-of-Day Alarms

♦ Reset Output/Pushbutton Reset (Debounced)

Input

♦ Programmable Output Provides Interrupt or

Square Wave

Other device features include two time-of-day alarms, a

selectable output that provides either an interrupt or

programmable square wave, and a calibrated

32.768kHz square-wave output. A reset input/output pin

provides a power-on reset for other devices.

Additionally, the reset pin is monitored as a pushbutton

input for generating a reset externally.

♦ Calibrated 32.768kHz Open-Drain Output

♦ Temp Sensor with 3°C Accuracy

♦ 3.3V Operating Voltage

♦ Commercial and Industrial Temperature Ranges

♦ 300-mil, 20-Pin SO Package

♦ Underwriters Laboratories (UL) Recognized

A precision temperature-compensated voltage refer-

ence and comparator circuit monitor the status of V

Ordering Information

to detect power failures, to provide a reset output, and

to automatically switch to the backup supply for the

RTC/TCXO when necessary. Additionally, the RST pin is

monitored as a pushbutton input for generating a reset

externally.

PART

TEMP RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

DS32B35-33#

DS32B35-33IND#

DS32C35-33#

DS32C35-33IND#

20 SO

Applications

Utility Power Meters

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

is exempt under RoHS requirements. The 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.

Servers

Telematics

GPS

Typical Operating Circuit, Pin Configuration, and Selector

Guide appear at end of data sheet.

______________________________________________ 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...22

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与DS32B35_10相关器件

型号	品牌	获取价格	描述	数据表
DS32B35-33	MAXIM	获取价格	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32B35-33#	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOIC-
DS32B35-33IND	MAXIM	获取价格	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32B35-33IND#	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOIC-
DS32C35	MAXIM	获取价格	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32C35-33	MAXIM	获取价格	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32C35-33#	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOIC-
DS32C35-33#T&R	MAXIM	获取价格	Real Time Clock, 1 Timer(s), CMOS, PDSO20, 0.300 INCH, ROHS COMPLIANT, SOIC-20
DS32C35-33IND	MAXIM	获取价格	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32EL0124	NSC	获取价格	125 MHz . 312.5 MHz Deserializer with DDR LVDS Parallel Interface

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