The TPS3619 and TPS3620 families of supervisory circuits monitor and control processor activity by providing backup-battery switchover for data retention of CMOS RAM.

During power on, RESET is asserted when the supply voltage (V_DD or V_BAT) becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors V_DD and keeps RESET output active as long as V_DD remains below the threshold voltage (V_IT). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time starts after V_DD has risen above V_IT. When the supply voltage drops below V_IT, the output becomes active (low) again.

The product spectrum is designed for supply voltages of 3.3 V and 5 V. The TPS3619 and TPS3620 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of –55°C to 125°C.

• Supply Current of 40 μA (Max)
• Battery-Supply Current of 100 nA (Max)
• Precision Supply-Voltage Monitor 3.3 V, 5 V, and Other Options on Request
• Backup-Battery Voltage Can Exceed VDD
• Power-On Reset Generator with Fixed 100-ms Reset Delay Time
• Voltage Monitor for Power-Fail or Low-Battery Monitoring
• Battery Freshness Seal (TPS3619)
• Pin-to-Pin Compatible With MAX819, MAX703, and MAX704
• 8-Pin Mini Small-Outline Package (MSOP) Package
• SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
  • Controlled Baseline
  • One Assembly/Test Site
  • One Fabrication Site
  • Available in Military (–55°C/125°C) Temperature Range(1)
  • Extended Product Life Cycle
  • Extended Product-Change Notification
  • Product Traceability
• APPLICATIONS
  • Fax Machines
  • Set-Top Boxes
  • Advanced Voice-Mail Systems
  • Portable Battery-Powered Equipment
  • Computer Equipment
  • Advanced Modems
  • Automotive Systems
  • Portable Long-Time Monitoring Equipment
  • Point-of-Sale Equipment

(1) Additional temperature ranges available - contact factory

• Number of supplies monitored
• 1
• Threshold voltage 1 (Typ) (V)
• 2.93
• Features
• Battery backup switchover, Manual reset capable
• Reset threshold accuracy (%)
• 4
• Output driver type/reset output
• Active-low, Push-pull
• Time delay (ms)
• 100
• Rating
• HiRel Enhanced Product
• Watchdog timer WDI (sec)
• None
• Operating temperature range (C)
• -55 to 125

TPS3619-33-EP的完整型号有：TPS3619-33MDGKREP、V62/06670-01XE，以下是这些产品的关键参数及官网采购报价：

TPS3619-33MDGKREP，工作温度：-55 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS3619-33MDGKREP的批量USD价格：4.356（1000+）

V62/06670-01XE，工作温度：-55 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网V62/06670-01XE的批量USD价格：4.356（1000+）

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