DS1670:便携系统控制器

The DS1670 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC), NV RAM controller, microprocessor monitor, and a 3-channel, 8-bit analog-to-digital converter (ADC). Communication with the DS1670 is established through a simple 3-wire interface. The RTC provides seconds, minutes, hours, day, date, month, and year information with leap year compensation. The RTC also provides an alarm interrupt. This interrupt works when the DS1670 is powered by the system power supply or when in battery-backup operation, so the alarm can be used to wake up a system that is powered down. Automatic backup and write protection of an external SRAM is provided through the VCCO, active-low CEOL, and active-low CEOH pins. The backup energy source used to power the RTC is also used to retain RAM data in the absence of VCC through the VCCO pin. The chip-enable outputs to RAM (active-low CEOL and active-low CEOH) are controlled during power transients to prevent data corruption.

关键特性
  • Provides Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100 Power-Control Circuitry Supports System Power-On from Day/Time Alarm
  • Microprocessor Monitor Halts Microprocessor During Power Fail Automatically Restarts Microprocessor after Power Failure Monitors Pushbutton for External Override Halts and Resets an Out-of-Control Microprocessor
  • NV RAM Control Automatic Battery Backup and Write Protection to External SRAM
  • 3-Channel, 8-Bit ADC
  • Simple 3-Wire Interface
  • 3.3V Operation
DS1670:原理框图
DS1670:原理框图
数据手册DataSheet
语言下载文件备注
英文DS1670.pdfRev 1; 08/2005
关键参数
Part NumberInterfaceVSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory TypeTime of Day AlarmsFunctionsPackage/PinsBudgetary
Price
typSee Notes
DS16703-Wire3.33006None1
  • NV SRAM Control
  • RTC
  • SOIC(W)/20
  • TSSOP/20
$4.08 @1k
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
DS1670E停止供货DS1670E+TSSOP,;20引脚;45.2mm²0°C至+70°CRoHS/无铅:否
DS1670E+生产中TSSOP,;20引脚;45.2mm²0°C至+70°CRoHS/无铅:无铅
DS1670E+T&R生产中TSSOP,;20引脚;45.2mm²0°C至+70°CRoHS/无铅:无铅
DS1670E/T&R停止供货DS1670E+T&RTSSOP,;20引脚;45.2mm²0°C至+70°CRoHS/无铅:否
DS1670S停止供货DS1670S+SOIC(W),;20引脚;138.5mm²0°C至+70°CRoHS/无铅:否
DS1670S+生产中SOIC(W),;20引脚;138.5mm²0°C至+70°CRoHS/无铅:无铅
DS1670.pdf DS1670
DS1670.pdf DS1670
DS1670.pdf DS1670
Tips for Writing Bulletproof Real-Time Clock Control Code DS3234
State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks DS3234
Oscillator Design Considerations for Low-Current Applications DS17885
Selecting a Backup Source for Real-Time Clocks DS3234
Using the DS32kHz with Maxim Real-Time Clocks DS17885
Lithium Coin-Cell Batteries: Predicting an Application Lifetime DS9034PCX
Design Considerations for Maxim Real-Time Clocks DS3234
DS1670 Portable System Controller DS1677
Crystal Considerations with Maxim Real-Time Clocks (RTCs) DS3234
DS1670.pdf DS1670
DS1670.pdf DS1670