DS1834:双路、经济型复位芯片,带有手动复位按钮

The DS1834 Dual EconoReset with Pushbutton is designed to monitor power and protect processing in dual-voltage systems. It operates from the higher of a 3-volt or 5-volt input, monitoring both for in-tolerance conditions. When safety thresholds are breached from either input, the DS1834 initiates reset. On power return, it automatically restarts the processor, maintaining reset for 350ms to allow stabilization. The DS1834 also monitors a pushbutton input to allow for external over-ride. Using pin adjustments, voltage reset tolerances can be set in different combinations for the 5V and 3.V power supplies, respectively: 10% and 10% 10% and 20% and 5% and 10%. DS1834A NMOS outputs can be wire-AND'd to either the 5-volt or 3-volt level. The DS1834 and DS1834D have CMOS outputs for low-current operation. The DS1834 is targeted for multi-voltage microprocessor systems and subsystems, or for buses that do not operate at the same voltage as the µP or core logic. By integrating monitoring functions required for a particular application, the DS1834 enhances processor reliability with considerable savings in space and cost.

关键特性
  • Monitors both 3.3V and 5V power supplies
  • 3.3V and 5V power-on and power transient resets
  • Provides pushbutton switch for manual reset control
  • Active low push-pull outputs (DS1834)
  • Active low open-drain outputs (DS1834A)
  • Active high push-pull outputs (DS1834D)
  • Draws internal power from the higher of the two sources
  • Uses precision temperature-compensated voltage reference and sensor
  • Maintains active high reset for 350ms after power return
  • Internal 5kΩ pull-up resistor
  • Operating ranges:
    • 5V with 5% or 10% tolerance
    • 3.3V with 10% or 20% tolerance
    • -40°C to +85°C
功能框图
DS1834、DS1834A、DS1834D:原理框图
关键参数
Part NumberInterfaceReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
DS1834Factory Fixed
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
85ms to 300msNo Watchdog
Manual Reset
Power Fail Comparator/Low Battery Detect
2.550
µMAX/8
PDIP(N)/8
SOIC(N)/8
$1.26 @1k
DS1834A
Active Low
Open Drain
µMAX/8
PDIP(N)/8
SOIC(N)/8
DS1834D-
µMAX/8
PDIP(N)/8
SOIC(N)/8
数据手册DataSheet
英文DS1834-DS1834D.pdfRev 1; 07/2000
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
DS1834CMOS、低电平有效生产中DS1834+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
DS1834+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
DS1834A漏极开路、低电平有效生产中DS1834A+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
DS1834A+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
DS1834AS漏极开路、低电平有效最后一次购买DS1834AS+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834AS+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834AS+T&R漏极开路、低电平有效,2500/盘生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834AS/T&R漏极开路、低电平有效,2500/盘停止供货DS1834AS/T&R+C08SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834AS/T&R/C02停止供货SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834AU漏极开路、低电平有效停止供货DS1834AU+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
DS1834AU+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
DS1834AU+T&R漏极开路、低电平有效,3000/盘生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
DS1834AU/T&R漏极开路、低电平有效,3000/盘停止供货DS1834AU+T&RµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
DS1834DCMOS、高电平有效停止供货DS1834D+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
DS1834D+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
DS1834DSCMOS、高电平有效停止供货DS1834DS+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834DS+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834DS+T&RCMOS、高电平有效,2500/盘生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834DS/T&RCMOS、高电平有效,2500/盘停止供货DS1834DS+T&RSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834DUCMOS、高电平有效停止供货DS1834DU+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
DS1834DU+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
DS1834DU+T&RCMOS、高电平有效,3000/盘生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
DS1834DU/T&RCMOS、高电平有效,3000/盘停止供货DS1834DU+T&RµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
DS1834SCMOS、低电平有效停止供货DS1834S+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834S+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834S+T&RCMOS、低电平有效,2500/盘生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1834S/T&RCMOS、低电平有效,2500/盘停止供货DS1834S+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1834UCMOS、低电平有效停止供货DS1834U+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
DS1834U+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
DS1834U+T&RCMOS、低电平有效,3000/盘生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
DS1834U/T&RCMOS、低电平有效,3000/盘停止供货DS1834U+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
DS1834-DS1834D.pdf DS1834D
DS1834-DS1834D.pdf DS1834D
DS1834D.pdf DS1834D
DS1834A.pdf DS1834D
DS1834.pdf DS1834D