參數(shù)資料
型號(hào)： DS32C35-33#
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/22頁(yè)
文件大?。?/td> 0K
描述： IC RTC W/TCXO 20-SOIC
產(chǎn)品變化通告： Product Discontinuation 28/Nov/2011
標(biāo)準(zhǔn)包裝： 37
類(lèi)型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，F(xiàn)RAM，閏年，方波輸出，TCXO/晶體
存儲(chǔ)容量： 8KB
時(shí)間格式： HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式： YY-MM-DD-dd
接口： I²C，2 線串口
電源電壓： 2.7 V ~ 3.63 V
電壓 - 電源，電池： 2.3 V ~ 3.6 V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 20-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 20-SOIC W
包裝： 管件
產(chǎn)品目錄頁(yè)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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS32C35-33# 功能描述:實(shí)時(shí)時(shí)鐘 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝: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:實(shí)時(shí)時(shí)鐘 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS32C35-33IND 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Accurate I2C RTC with Integrated TCXO/Crystal/FRAM
DS32C35-33IND# 功能描述:實(shí)時(shí)時(shí)鐘 w/Integrated TCXO/Crystal/FRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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