Maxim > Products > Supervisors, Voltage Monitors, Sequencers > DS1818

DS1818

3.3V EconoReset with Pushbutton

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS1813 (5V) and DS1818 (3.3V) EconoResets are simple three-pin voltage monitors and power-on resets that hold reset for 150ms for stabilization after power returns to tolerance. The voltage monitor uses precision temperature reference and comparator circuits that detect out-of-tolerance conditions and generate an active low reset. The DS1818 has an open-drain output with an internal 5.5kΩ pull-up resistor for use in a wired-AND circuit. The DS1818 also monitors a pushbutton on the reset output, generating a reset when the pushbutton is released.

EconoResets replace discrete components and save space, particularly in the new SOT-23 package. They can benefit any system that requires reliable processor operation, especially consumer products like printers, HVAC, energy management, cellular telephones, PDAs, and set-top boxes.

Data Sheet

Download	Rev 1	(PDF, 128kB)
E-Mail

Key Features

Voltage monitor for power-fail detection
Monitors pushbutton for external over-ride
Active low reset output
150ms pause for stabilization
Efficient open-drain output with internal 5.5kΩ pull-up resistor
Maximum quiescent current of 35µA
Operating ranges:
- 3.3V with 5%, 10% or 20% tolerance
- -40°C to +85°C

Key Specifications:

Supervisors (1 Monitored Voltage)

Part Number

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Budgetary Price

min

@ +25°C

max

See Notes

DS1818

2.5 to 3.3

Active Low

Open Drain

85ms to 300ms

No Watchdog

Manual Reset

2.5

$0.40 @1k

See All Supervisors (1 Monitored Voltage) (274)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Block Diagram

Product Guides

Microprocessor Supervisory (PDF)

Reliability Reports

Reliability Report:

DS1818.pdf

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Notes	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1818-10	3.3V-10% Monitor			Active	DS1818-10+	TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818-10+				Active		TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818-10+T&R	3.3V-10%			Active		TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818-10/T&R	3.3V-10%			Active	DS1818-10+T&R	TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818-20	3.3V-20% Monitor			Active	DS1818-20+	TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818-20+				Active		TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818-20+T&R	3.3V-20%			Active		TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818-20/T&R	3.3V-20%			Active	DS1818-20+T&R	TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818-5	3.3V-5% Monitor			Active	DS1818-5+	TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818-5+				Active		TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Notes	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1818-5+T&R	3.3V-5%			Active		TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818-5/T&R	3.3V-5%			Active	DS1818-5+T&R	TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818R-10+T&R	3.3V-10%			Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-10-U				Active	DS1818R-10-U+	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818R-10-U+				Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-10/T&R	3.3V-10%			Active	DS1818R-10+T&R	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818R-20+T&R	3.3V-20%			Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-20-U				Active	DS1818R-20-U+	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818R-20-U+				Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-20/T&R	3.3V-20%			Active	DS1818R-20+T&R	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Notes	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1818R-5+T&R	3.3V-5%			Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-5-U				Active	DS1818R-5-U+	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1818R-5-U+				Active		SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1818R-5/T&R	3.3V-5%			Active	DS1818R-5+T&R	SOT;3 pin;8 mm² Outline Drawing:21-0051 (PDF) Land Pattern: 90-0179 (PDF) Use pkgcode/variation: U3-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 1; 1999-11-19
This page last modified: 2009-10-23