MAX6394

High-Accuracy µP Reset Circuit

µP Supervisor Provides the Highest Accuracy at 1%

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Active: In Production.

Description

The MAX6394 low-power CMOS microprocessor (µP) supervisory circuit is designed to monitor power supplies in µP and digital systems. It offers excellent circuit reliability by providing 1% accurate thresholds over temperature and by eliminating external components and adjustments. The MAX6394 also provides a debounced manual reset input.

This device performs a single function: it asserts a reset signal whenever the VCC supply voltage falls below a preset threshold or whenever manual reset is asserted. Active-low RESET remains asserted for an internally programmed interval (reset timeout period) after VCC has risen above the reset threshold or manual reset is deasserted. The MAX6394's open-drain active-low RESET output can be pulled up to a voltage higher than VCC.

The MAX6394 comes with factory-trimmed reset threshold voltages from 2.4V to 4.8V. Preset timeout periods of 0.7ms, 14ms, 105ms, and 826ms are also available. The device comes in a SOT143 package.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 132kB)
Send this datasheet to any email addressE-Mail

Key Features

  • ±0.6% Threshold Accuracy at TA = +25°C
  • ±1.0% Threshold Accuracy from -40°C to +125°C
  • Small SOT143 Package
  • Open-Drain Active-Low RESET Output Can Exceed VCC
  • Precision, Factory-Set VCC Reset Thresholds: Nine Options from 2.4V to 4.8V
  • Four Reset Timeout Periods Available: 0.7ms, 14ms, 105ms, and 826ms (minimum)
  • Immune to Short VCC Transients
  • 5µA Supply Current
 

Applications/Uses

  • Computers
  • Controllers
  • Critical µP and µC Power Monitoring
  • Intelligent Instruments
  • Portable/Battery-Powered Equipment
   

Key Specifications:

Supervisors (1 Monitored Voltage)
Part Number Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Supervisor Features Reset Thresh. Accur.
(%)
ICC
(µA)
Budgetary Price
min @ +25°C max See Notes
MAX6394 
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
1ms to 15ms
85ms to 300ms
300ms to 1s
<1ms
No Watchdog Manual Reset 0.6 15 $1.60 @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

MAX6394: Typical Operating Circuit
Typical Operating Circuit

Product Guides

Microprocessor Supervisory (PDF)

Reliability Reports

Reliability Report: MAX6394.pdf
Show FIT data for:

Software/Models

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Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
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Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX6394US240D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US240D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US240D3+  
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US240D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US240D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US294D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US294D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US294D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US294D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US300D1+    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX6394US300D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US300D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US300D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US300D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US310D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US310D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US310D3+  
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US310D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US310D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US317D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX6394US317D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US317D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US317D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US445D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US445D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US445D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US445D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US455D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US455D2+    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US455D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX6394US455D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US455D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US470D1+    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US470D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US470D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US470D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US470D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US480D1+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US480D2+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US480D3+  
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX6394US480D3+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US480D3/V+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX6394US480D4+T    
Active SOT;4 pin;8 mm²
Outline Drawing:21-0052 (PDF)
Land Pattern: 90-0183 (PDF)
Use pkgcode/variation: U4+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

Notes:
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  3. 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.
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See All Supervisors (1 Monitored Voltage) (274 Products)

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Information Index

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Description
Key Features
Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
Application Notes
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Reliability Reports
Software/Models
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Document Ref.: 19-3202 Rev 0; 2008-02-12
This page last modified: 2009-10-15


 


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