DS1816R-10/T&R ,3.3V EconoReset with Open Drain OutputDS18163.3V EconoReset withOpen Drain Output
DS1816R-10-U+ ,3.3V EconoReset with Open Drain OutputFEATURES PIN ASSIGNMENT Automatically restarts a microprocessor after3power failureDALLASDS1816 M ..
DS1816R-20/T&R ,3.3V EconoReset with Open Drain OutputPIN DESCRIPTIONTO-921 RST Active Low Reset Output2 V Power SupplyCC3 GND GroundSOT-231 RST Active L ..
DS1817 ,Active High 3.3V EconoResetPIN DESCRIPTIONTO-921 RST Active High Reset Output2 V Power SupplyCC3 GND GroundSOT-231 RST Active ..
DS1817 ,Active High 3.3V EconoResetFEATURES PIN ASSIGNMENT Automatically restarts a microprocessor after3power failureDALLASDS1817 M ..
DS1817 ,Active High 3.3V EconoResetDS1817Active High 3.3V EconoReset
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
DXT651-13 , LOW VCE(SAT) NPN SURFACE MOUNT TRANSISTOR
DS1816R-10/T&R-DS1816R-10-U+-DS1816R-20/T&R
3.3V EconoReset with Open Drain Output
FEATURESAutomatically restarts a microprocessor after
power failureMaintains reset for 150ms after VCC returns to
an in-tolerance conditionReduces need for discrete componentsPrecision temperature-compensated voltage
reference and voltage sensorAccurate 5%, 10% or 20% power monitoring20% tolerance for use with 3V systemsLow-cost TO-92 or space saving SOT-23
packages availableEfficient open-drain output with internal
5kpull-up resistorOperating temperature -40C to +85C
PIN ASSIGNMENT
PIN DESCRIPTION
TO-92RST Active Low Reset Output
2 VCC Power Supply
3 GND Ground
SOT-23RST Active Low Reset Output
2 VCC Power Supply
3 GND Ground
DESCRIPTIONThe DS1816 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 150ms to allow the power supply and
processor to stabilize.
DS1816
3.3V EconoReset with
Open Drain 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
DS1816
Econo
Reset
DS1816
OPERATION — POWER MONITORThe DS1816 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 150ms after the power supply has
reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST
is released.
BLOCK DIAGRAM (OPEN-DRAIN OUTPUT) Figure 1
APPLICATION EXAMPLE Figure 2
DS1816
TIMING DIAGRAM: POWER-UP Figure 3
TIMING DIAGRAM: POWER-DOWN Figure 4
DS1816
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 Range-40°C to +85°C
Storage Temperature Range-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 VoltageVCC0.05.5V1
DC ELECTRICAL CHARACTERISTICS (-40C to +85C; VCC = 1.2V to 5.5V)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESOutput Current @ 0.4VIOL+10mA2, 3
Operating Current VCC < 5.5VICC2835A4
VCC Trip Point (DS1816-5)VCCTP2.983.063.15V1
VCC Trip Point (DS1816-10)VCCTP2.802.882.97V1
VCC Trip Point (DS1816-20)VCCTP2.472.552.64V1
Internal Pull-Up ResistorRP3.55.57.5k7
Output CapacitanceCOUT10pF
AC ELECTRICAL CHARACTERISTICS (-40C to +85C; VCC = 1.2V to 5.5V)
PARAMETERSYMBOLMINTYPMAXUNITSNOTESRESET Active TimetRST100150250ms5
VCC Detect to RSTtRPD25s
VCC Slew Rate
(VCCTP (MAX) to VCCTP (MIN))300s8
VCC Slew Rate
(VCCTP (MIN) to VCCTP (MAX))0ns
VCC Detect to RSTtRPU100150250ms5, 6
DS1816
NOTES:1. All voltages are referenced to ground.
2. Measured with VCC 2.7V.
3. A 1kexternal pull-up resistor may be required in some applications for proper operation of the
microprocessor reset control circuit.
4. Measured with RST output open.
5. Measured with 2.7V VCC 3.3V.
6. tR = 5s
7. VOH and IOH are a function of the value of RP and the associated output load conditions.
8. The tF value is for reference in defining values for tRPD and should not be considered a requirement for
proper operation or use of the device.
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%
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
