DS1810R-10/T&R ,5V EconoReset with Push-Pull OutputPIN DESCRIPTIONTO-921 RST Active Low Reset Output2 V Power SupplyCC3 GND GroundSOT-231 RST Active L ..
DS1810R-10-U+ ,5V EconoReset with Push-Pull OutputPIN DESCRIPTIONTO-921 RST Active Low Reset Output2 V Power SupplyCC3 GND GroundSOT-231 RST Active L ..
DS1810R-5/T&R ,5V EconoReset with Push-Pull OutputFEATURES PIN ASSIGNMENT Automatically restarts a microprocessor after3power failureDALLASDS1810 M ..
DS1810R-5+T&R ,5V EconoReset with Push-Pull OutputDS18105V EconoReset with Push-Pull Output
DS1810R-5-U+ ,5V EconoReset with Push-Pull OutputFEATURES PIN ASSIGNMENT Automatically restarts a microprocessor after3power failureDALLASDS1810 M ..
DS1811 ,5V EconoReset with Open Drain OutputPIN DESCRIPTIONTO-921 RST Active Low Reset Output2 V Power SupplyCC3 GND GroundSOT-231 RST Active L ..
DWC010 ,Silicon Epitaxial Planar Type Ultrahigh-Speed Switching DiodeAbsolute Maximum Ratings at Ta = 25˚CPl arameter Ss ymbo Cs ondition Rt ating UniPV eak Reverse Vol ..
DWR-SJS-TU2-1 , Power LED
DXT3150-13 , NPN SURFACE MOUNT TRANSISTOR
DXT3904 , TECHNICAL SPECIFICATIONS OF NPN EPITAXIAL PLANAR TRANSISTOR
DXT3904-13 , NPN SURFACE MOUNT TRANSISTOR
DXT5551 , TECHNICAL SPECIFICATIONS OF NPN EPITAXIAL PLANAR TRANSISTOR
DS1810R-10/T&R-DS1810R-10-U+-DS1810R-5/T&R-DS1810R-5+T&R-DS1810R-5-U+
5V EconoReset with Push-Pull Output
FEATURESAutomatically restarts a microprocessor after
power failureMaintains reset for 150 ms after VCC returns
to an in-tolerance conditionReduces need for discrete componentsPrecision temperature-compensated voltage
reference and voltage sensorLow-cost TO-92 or space saving surface
mount SOT-23 packages availablePush-Pull output for low current operationOperating temperature -40°C to +85°C
PIN ASSIGNMENT
PIN DESCRIPTION
TO-92RSTActive Low Reset Output
2 VCC Power Supply
3 GND Ground
SOT-23RSTActive Low Reset Output
2 VCC Power Supply
3 GND Ground
DESCRIPTIONThe DS1810 EconoReset uses a precision temperature reference and comparator circuit to monitor the
status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition,
the reset signal is kept in the active state for approximately 150 ms to allow the power supply and
processor to stabilize.
DS1810
5V EconoReset with Push-Pull Output
TOP VIEW
SOT-23 PACKAGE
See Mech.
Drawings Section
On Website1 2 3
1 2 3
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
DALLAS
DS1810
Econo
Reset
DS1810
OPERATION - POWER MONITORThe DS1810 provides the function of detecting out-of-tolerance power supply conditions and warning a
processor-based system of impending power failure. When VCC is detected as out-of-tolerance, the RST
signal is asserted. On power-up, RST is kept active for approximately 150 ms after the power supply has
reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST
is released.
BLOCK DIAGRAM (PUSH-PULL OUTPUT) Figure 1
APPLICATION EXAMPLE Figure 2
OUTPUT VALID CONDITIONSAll versions of the DS1810 can maintain a valid output as long as VCC remains above 1.2 volt. However,
the RST outputs on the DS1810 use a push-pull structure which can maintain a valid output below 1.2
volts on an input. To sink current below 1.2 volts, a resistor can be connected from RST to Ground (see
Figure 3). This arrangement will maintain a valid value on the RST outputs even it VCC approaches 0
volts. During both power-up and -down this arrangement will draw current when RST is in the high state.
A value of about 100 k should be adequate to maintain a valid condition.
DS1810
APPLICATION DIAGRAM:
RST VALID TO 0 VOLTS VCC ON THE DS1810 Figure 3
TIMING DIAGRAM: POWER-UP Figure 4
TIMING DIAGRAM: POWER-DOWN Figure 5
DS1810
ABSOLUTE MAXIMUM RATINGS*Voltage on VCC Pin Relative to Ground -0.5V to +7.0V
Voltage on RST Relative to Ground -0.5V to VCC +0.5V
Operating Temperature -40°C to +85°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C for 10 secondsThis is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS (-40C to +85C)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESSupply VoltageVCC1.25.5V1
DC ELECTRICAL CHARACTERISTICS (-40C to +85C; VCC=1.2V to 5.5V)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESOutput Voltage @ 0-500 AVOHVCC-0.5VVCC-0.1VV1
Output Current @ 2.4VIOH350A2
Output Current @ 0.4VIOL+10mA2
Operating Current VCC < 5.5ICC3040A3
VCC Trip Point (DS1810-5)VCCTP4.504.624.75V1
VCC Trip Point (DS1810-10)VCCTP4.254.374.49V1
VCC Trip Point (DS1810-15)VCCTP4.004.124.24V1
Output CapacitanceCOUT10pF
AC ELECTRICAL CHARACTERISTICS (-40C to +85C; VCC=1.2V to 5.5V)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESRESET Active TimetRST100150300ms
VCC Detect to RSTtRPD25s
VCC Slew Rate
(VCCTP (MAX) to VCCTP (MIN))300s
VCC Slew Rate
(VCCTP (MIN) to VCCTP (MAX))0ns
VCC Detect to RSTtRPU100150300ms4
DS1810
NOTES:1. All voltages are referenced to ground.
2. Measured with VCC 2.7 volts.
3. Measured with RST output open.
4. tR = 5 s.
PART MARKING CODES“A”, “B”, &“C” represent the device type.
810-DS1810
811 -DS1811
812 -DS1812
813 -DS1813
815 -DS1815
816 -DS1816
817 -DS1817
818 -DS1818
“D” represents the device tolerance.
A -5%
B -10%
C -15%
D -20%
SOT-23 PACKAGE
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
