Device Information
 
 
X40420 Printer Friendly Version
 
Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch
 
Datasheets,
Related Docs
& Simulations		DescriptionKey
Features		Parametric
Data		Application
Diagrams		Related
Devices
 
 
Ordering Information
 iBuy direct from Intersil  iBuy direct - out of stock  Request samples
 Check distributor inventory Green/Pb(Lead free) Device  Available in RoHS/Pb-Free  
Part No. Design-In
Status		 Temp. Package MSL Price
US $		 PB Free
X40420S14IZ-A Active Ind 14 Ld SOIC 3 2.20 PB Free Disti-Buy  
X40420S14IZ-AT1 Active Ind 14 Ld SOIC T+R 3 2.20 PB Free Disti-Buy  
X40420S14IZ-B Active Ind 14 Ld SOIC 3 2.20 PB Free Disti-Buy  
X40420S14IZ-BT1 Active Ind 14 Ld SOIC T+R 3 2.20 PB Free Disti-Buy  
X40420S14Z-A Active Comm 14 Ld SOIC 3 2.09 PB Free Disti-Buy  
X40420S14Z-AT1 Active Comm 14 Ld SOIC T+R 3 2.09 PB Free Disti-Buy  
X40420S14Z-B Active Comm 14 Ld SOIC 3 2.09 PB Free Disti-Buy  
X40420S14Z-BT1 Active Comm 14 Ld SOIC T+R 3 2.09 PB Free Disti-Buy  
X40420V14I-C Active Ind 14 Ld TSSOP 1 2.77   Disti-Buy  
X40420S14-A InActive Comm 14 Ld SOIC 1 N/A      
X40420S14-AT1 InActive Comm 14 Ld SOIC T+R 1 N/A      
X40420S14-B InActive Comm 14 Ld SOIC 1 N/A      
X40420S14-BT1 InActive Comm 14 Ld SOIC T+R 1 N/A      
X40420S14-C InActive Comm 14 Ld SOIC 1 N/A      
X40420S14-CT1 InActive Comm 14 Ld SOIC T+R 1 N/A      
X40420S14I-A InActive Ind 14 Ld SOIC 1 N/A      
X40420S14I-AT1 InActive Ind 14 Ld SOIC T+R 1 N/A      
X40420S14I-B InActive Ind 14 Ld SOIC 1 N/A      
X40420S14I-BT1 InActive Ind 14 Ld SOIC T+R 1 N/A      
X40420S14I-C InActive Ind 14 Ld SOIC 1 N/A      
X40420S14I-CT1 InActive Ind 14 Ld SOIC T+R 1 N/A      
X40420V14-A InActive Comm 14 Ld TSSOP 1 N/A      
X40420V14-AT1 InActive Comm 14 Ld TSSOP T+R 1 N/A      
X40420V14-B InActive Comm 14 Ld TSSOP 1 N/A      
X40420V14-BT1 InActive Comm 14 Ld TSSOP T+R 1 N/A      
X40420V14-C InActive Comm 14 Ld TSSOP 1 N/A      
X40420V14-CT1 InActive Comm 14 Ld TSSOP T+R 1 N/A      
X40420V14I-A InActive Ind 14 Ld TSSOP 1 N/A      
X40420V14I-AT1 InActive Ind 14 Ld TSSOP T+R 1 N/A      
X40420V14I-B InActive Ind 14 Ld TSSOP 1 N/A      
X40420V14I-BT1 InActive Ind 14 Ld TSSOP T+R 1 N/A      
X40420V14I-CT1 InActive Ind 14 Ld TSSOP T+R 1 N/A      
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
 
  Description

The X40420, X40421 combines power-on reset control, watchdog timer, supply voltage supervision, and secondary supervision, manual reset, and Block Lock™ protect serial EEPROM in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

Applying voltage to VCC activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system oscillator to stabilize before the processor can execute code.

 
  Key Features
 
  • Dual voltage detection and reset assertion
    • Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V)
    • VTRIP2 programmable down to 0.9V
    • Adjust low voltage reset threshold voltages using special programming sequence
    • Reset signal valid to VCC = 1V
    • Monitor two voltages or detect power fail
  • Battery switch backup
  • VOUT: 5mA to 50mA from VCC; or 250μA from VBATT
  • Fault detection register
  • Selectable power-on reset timeout (0.05s, 0.2s, 0.4s, 0.8s)
  • Selectable watchdog timer interval (25ms, 200ms, 1.4s, off)
  • Debounced manual reset input
  • Low power CMOS
    • 25μA typical standby current, watchdog on
    • 6μA typical standby current, watchdog off
    • 1μA typical battery current in backup mode
  • 4Kbits of EEPROM
    • 16 byte page write mode
    • Self-timed write cycle
    • 5ms write cycle time (typical)
  • Built-in inadvertent write protection
    • Power-up/power-down protection circuitry
    • Block lock protect 0 or 1/2, of EEPROM
  • 400kHz 2-wire interface
  • 2.7V to 5.5V power supply operation
  • Monitor voltages: 5V to 1.6V
  • Memory security
  • Battery switch backup
  • VOUT 5mA to 50mA
  • Available packages
    • 14 Ld SOIC, TSSOP
  • Pb-free plus anneal available (RoHS compliant)
Related Documentation
 
Application Note(s)   Application Note(s):
 
Datasheet(s)   Datasheet(s):
 
 
  Parametric Data
# of Voltage Monitors2
VS Range (V)2.7 to 5.5
2.7 to 5.5
2.7 to 3.6
Voltage Threshold 14.6 (1%)
4.6 (1%)
2.9 (1.7%)
Voltage Threshold 22.9 (1.7%)
2.6 (2%)
1.6 (3%)
Reset Output TypeActive High
Watchdog Timer (s)OFF, 0.025, 0.2, 1.4
Manual ResetY
Bus InterfaceI2C
EEPROM Size (kbits)4
Battery Montor and SwitchoverY
Fault Detection RegisterY
Suffix-A
-B
-C
POR (ms)50, 200, 400, 800
RTC FunctionN
FeaturesBattery Switch, WDO Out
 
  Application Block Diagrams
 
 
 
Applications
 
  • Communications equipment
    • Routers, hubs, switches
    • Disk arrays
  • Industrial systems
    • Process control
    • Intelligent instrumentation
  • Computer systems
    • Desktop computers
    • Network servers
 
  Related DevicesParametric Table   Parametric Table
 
 X40020 Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch 
 X40415 Dual Voltage Monitor with Integrated CPU Supervisor 
 X40421 Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch 

 
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