Maxim > Products > Supervisors, Voltage Monitors, Sequencers > DS1233A

DS1233A

3.3V EconoReset

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS1233A EconoReset monitors two vital conditions for a microprocessor: power supply and external override. A precision temperature-compensated reference and comparator circuit are used to monitor the status of the power supply (V_CC). When an out-of-tolerance condition is detected, an internal power fail signal is generated which forces reset to the active state. When V_CC returns to an in-tolerance condition, the reset signal is kept in the active state for approximately 350ms to allow the power supply and processor to stabilize. The second function of the DS1233A is pushbutton reset control. The DS1233A debounces a pushbutton closure and will generate a 350ms reset pulse upon release.

Data Sheet

Download	Rev 1	(PDF, 108kB)
E-Mail

Key Features

Automatically restarts microprocessor after power failure
Monitors pushbutton for external override
Internal circuitry debounces pushbutton switch
Maintains reset for 350ms after V_CC returns to an in-tolerance condition or pushbutton released
Accurate 10% or 15% microprocessor 3.3V power supply monitoring
Reduces need for discrete components
Precision temperature-compensated voltage reference and voltage sensor
Low-cost TO-92 package or surface mount SOT-223 package
Internal 5kΩpull-up resistor
Operating temperature of -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

DS1233A

2.5 to 3.3

Active Low

Open Drain

With Internal Pull-Up

85ms to 300ms

No Watchdog

Manual Reset

2.5

$0.69 @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

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Software/Models

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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
DS1233A-10	3.3V-10% Monitor			Active	DS1233A-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
DS1233A-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
DS1233A-10+T&R	3.3V-10% 2000/Reel			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
DS1233A-10/T&R	3.3V-10% 2000/Reel			Active	DS1233A-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
DS1233A-15	3.3V-15% Monitor			Active	DS1233A-15+	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
DS1233A-15+				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
DS1233A-15+T&R	3.3V-15% 2000/Reel			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
DS1233A-15/T&R	3.3V-15% 2000/Reel			Active	DS1233A-15+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
DS1233AZ-10	3.3V-10% Monitor			Active	DS1233AZ-10+	SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1233AZ-10+				Active		SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+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
DS1233AZ-10+T&R	3.3V-10% 2500/Reel			Active		SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1233AZ-10/T&R	3.3V-10%, 2500/Reel			Active	DS1233AZ-10+T&R	SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1233AZ-10/TR+C19				Active		SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1233AZ-15	3.3V-15% Monitor			Active	DS1233AZ-15+	SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1233AZ-15+				Active		SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1233AZ-15+T&R	3.3V-15% 2500/Reel			Active		SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1233AZ-15/T&R	3.3V-15% 2500/Reel			Active	DS1233AZ-15+T&R	SOT-223;3 pin;48.9 mm² Outline Drawing:21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3-1*	-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; 2002-02-22
This page last modified: 2009-10-26