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DS1818R-10+T&R

DS1818R-10+T&R

DS1818R-10+T&R

For Reference Only

Part Number DS1818R-10+T&R
Manufacturer Maxim Integrated
Description IC 2.88V W/PB 10% SOT23-3
Datasheet DS1818R-10+T&R Datasheet
Package TO-236-3, SC-59, SOT-23-3
In Stock 23,111 piece(s)
Unit Price $ 1.1020 *
Lead Time To be Confirmed
Estimated Delivery Time Dec 2 - Dec 7 (Choose Expedited Shipping)
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Part Number # DS1818R-10+T&R (PMIC - Supervisors) is manufactured by Maxim Integrated and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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DS1818R-10+T&R Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - PMIC - Supervisors
Datasheet DS1818R-10+T&RDatasheet
PackageTO-236-3, SC-59, SOT-23-3
SeriesEconoReset
TypeSimple Reset/Power-On Reset
Number of Voltages Monitored1
OutputOpen Drain or Open Collector
ResetActive Low
Reset Timeout100 ms Minimum
Voltage - Threshold2.88V
Operating Temperature-40°C ~ 85°C (TA)
Mounting TypeSurface Mount
Package / CaseTO-236-3, SC-59, SOT-23-3
Supplier Device PackageSOT-23-3

DS1818R-10+T&R Datasheet

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Page 2

BENEFITS AND FEATURES • Improves Reliability of Processor Operation o Temperature-Compensated Voltage Monitor for Precise, Automated Power- Fail Detection o Automatically Restarts a Microprocessor After Power Failure o Maintains Reset for 150ms After VCC Returns to Tolerance for Processor Stabilization o Monitors Pushbutton for External Override o Active-Low Reset Output • Efficient Open-Drain Output with Internal 5.5kΩ Pullup Resistor Saves Power and Space o 35µA (max) Quiescent Current • Allows for Easy Design with No Complicated Settings o Fixed 3.3V Reset Threshold o 5%, 10%, and 20% Tolerance Versions Available • Operates in Most Commercial and Industrial Environments o -40°C to +85°C Operating Temperature Range • MXD1818 Offers Improved Performance over the DS1818 PIN ASSIGNMENT PIN DESCRIPTION TO-92 1 RST Active Low Reset Output 2 VCC Power Supply 3 GND Ground SOT-23 1 RST Active Low Reset Output 2 VCC Power Supply 3 GND Ground DESCRIPTION The DS1818 EconoReset uses a precision temperature-compensated 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. The DS1818 also monitors a pushbutton on the reset output. If the reset line is pulled low, a reset is generated upon release and the DS1818 output will be held in reset output low for typically 150 ms. DS1818 3.3V EconoReset with Pushbutton 1 2 3 TOP VIEW SOT-23 PACKAGE See Mech. Drawings Section On Website 1 2 3 1 2 3 BOTTOM VIEW TO-92 PACKAGE See Mech. Drawings Section On Website DALLAS DS1818 Econo Reset 1 of 5 19-7559; Rev 1; 3/15

Page 3

DS1818 OPERATION - POWER MONITOR The DS1818 provides the functions of detecting out-of-tolerance power supply conditions and warning a processor-based system of impending power failures. 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 (OPEN-DRAIN OUTPUT) Figure 1 APPLICATION EXAMPLE Figure 2 OPERATION - PUSHBUTTON RESET The DS1818 provides a pushbutton switch for manual reset control. When the DS1818 is not in a reset cycle, a pushbutton reset can be generated by pulling the RST pin low for at least 1 µs. When the pushbutton is held low, the RST is forced active low and will remain active low for about 150 ms after the pushbutton is released. See Figure 2 for an application example and Figure 3 for the timing diagram. TIMING DIAGRAM: PUSHBUTTON RESET Figure 3 2 of 6

Page 4

DS1818 TIMING DIAGRAM: POWER-UP Figure 4 TIMING DIAGRAM: POWER-DOWN Figure 5 3 of 6

Page 5

DS1818 ABSOLUTE MAXIMUM RATINGS* Voltage on VCC Pin Relative to Ground -0.5V to +7.0V Voltage on RST Relative to Ground -0.5V to +5VCC +0.5V Operating Temperature -40°C to +85°C Storage Temperature -55°C to +125°C Soldering Temperature 260°C for 10 seconds * This 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 (-40°C to +85°C) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Supply Voltage VCC 1.0 5.5 V 1 DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC=1.2V to 5.5V) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Output Current @ 0.4 V IOL +10 mA 2, 3 Voltage Input Low VIL 0.4 V 1 Voltage Input High VIH 0.7 *VCC V 1 Operating Current VCC < 5.5V ICC 28 35 µA 4 VCC Trip Point (DS1818-5) VCCTP 2.98 3.06 3.15 V 1 VCC Trip Point (DS1818-10) VCCTP 2.80 2.88 2.97 V 1 VCC Trip Point (DS1818-20) VCCTP 2.47 2.55 2.64 V 1 Internal Pull-up Resistor RP 3.50 5.5 7.5 kΩ 7 Output Capacitance COUT 10 pF AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC=1.2V to 5.5V) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES RESET Active Time tRST 100 150 250 ms 5 VCC Detect to RST tRPD 2 5 µs VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN)) tF 300 µs 8 VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX)) tR 0 ns VCC Detect to RST tRPU 100 150 250 ms 5, 6 Pushbutton Detect to RST tPB 1 µs Pushbutton Reset tPBRST 100 150 250 ms 5 4 of 6

Page 6

DS1818 NOTES: 1. All voltages are referenced to ground. 2. Measured with VCC ≥ 2.7V. 3. A 1 kΩ external 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 = 5 µs. 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% 5 of 6

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