参数资料
| 型号： | DS32C35-33# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/TCXO 20-SOIC |
| 产品变化通告： | Product Discontinuation 28/Nov/2011 |
| 标准包装： | 37 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，FRAM，闰年，方波输出，TCXO/晶体 |
| 存储容量： | 8KB |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.7 V ~ 3.63 V |
| 电压 - 电源，电池： | 2.3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1433 (CN2011-ZH PDF) |
General Description
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
as a slave device on an I2C serial interface, and are
available in both commercial and industrial temperature
ranges in a 300-mil, 20-pin SO package.
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.
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.
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.
A precision temperature-compensated voltage refer-
ence and comparator circuit monitor the status of VCC
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.
Applications
Servers
Utility Power Meters
Telematics
GPS
Features
Integrated 32.768kHz Crystal
Fast (400kHz) I2C Interface
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
Backup Time and Write Protection
Two Available Densities of Nonvolatile Memory
2048 Bytes (DS32B35)
8192 Bytes (DS32C35)
No Cycle Limitations on Memory
Power-Switching Circuit Selects Between Main
Power and Battery Backup for the RTC
Programmable Square Wave with Frequency of
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
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
DS32B35/DS32C35
Accurate I2C RTC with Integrated
TCXO/Crystal/FRAM
______________________________________________
Maxim Integrated Products
1
19-5340; Rev 3; 7/10
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.
Typical Operating Circuit, Pin Configuration, and Selector
Guide appear at end of data sheet.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS32B35-33#
0°C to +70°C
20 SO
DS32B35-33IND#
-40°C to +85°C
20 SO
DS32C35-33#
0°C to +70°C
20 SO
DS32C35-33IND#
-40°C to +85°C
20 SO
#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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS32C35-33# | 功能描述:实时时钟 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS32C35-33#T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC ACCURATE I2C 3.3V 20-SOIC |
| DS32C35-33#T&R | 功能描述:实时时钟 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS32C35-33IND | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Accurate I2C RTC with Integrated TCXO/Crystal/FRAM |
| DS32C35-33IND# | 功能描述:实时时钟 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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