Maxim > Products > Supervisors, Voltage Monitors, Sequencers > MAX793, MAX793R, MAX793S, ...

MAX793, MAX793R, MAX793S, MAX793T, MAX794, MAX795, MAX795R, MAX795S, MAX795T

3.0V/3.3V Adjustable Microprocessor Supervisory Circuits

Full-Function Battery-Backup ICs for 3V/3.3V Systems
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Status Explanations for product status codes

Part Number Status
MAX793 Active: In Production.
MAX793R Active: In Production.
MAX793S Active: In Production. See Ordering Information for details.
MAX793T Active: In Production.
MAX794 Active: In Production.
MAX795 Active: In Production.
MAX795R Active: In Production.
MAX795S Active: In Production.
MAX795T Active: In Production.

Description

The MAX793/MAX794/MAX795 microprocessor (µP) supervisory circuits monitor and control the activities of +3.0V/+3.3V µPs by providing backup-battery switchover, among other features such as low-line indication, µP reset, write protection for CMOS RAM, and a watchdog (see the Selector Guide in the full data sheet). The backup-battery voltage can exceed VCC, permitting the use of 3.6V lithium batteries in systems using 3.0V to 3.3V for VCC.

The MAX793/MAX795 offer a choice of reset threshold voltage range (denoted by suffix letter): 3.00V to 3.15V (T), 2.85V to 3.00V (S), and 2.55V to 2.70V (R). The MAX794's reset threshold is set externally with a resistor divider. The MAX793/MAX794 are available in 16-pin DIP and narrow SO packages, and the MAX795 comes in 8-pin DIP and SO packages.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 6 (PDF, 188kB)
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Key Features

MAX793/MAX794/MAX795
  • Precision Supply-Voltage Monitor:
    • Fixed Reset Trip Voltage (MAX793/MAX795)
    • Adjustable Reset Trip Voltage (MAX794)
  • Guaranteed Reset Assertion to VCC = 1V
  • Backup-Battery Power Switching—Battery Voltage Can Exceed VCC
  • On-Board Gating of Chip-Enable Signals—7ns Max Propagation Delay
MAX793/MAX794 Only
  • Battery Freshness Seal
  • Battery OK Output (MAX793)
  • Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning
  • Independent Watchdog Timer (1.6s timeout)
  • Manual Reset Input
  • Underwriters Laboratories (UL) Recognized
  

Applications/Uses

  • Battery-Powered Computers/Controllers
  • Critical µP Power Monitoring
  • Embedded Controllers
  • Intelligent Controllers
  • Portable Equipment
   

Key Specifications:

Battery Backup Circuits
Part Number Reset Thresh.
(V)		 Reset Out ICC
(µA)		 Features Oper. Temp.
(°C)		 Package/Pins Smallest Available Pckg.
(mm2)		 Budgetary Price
max max w/pins See Notes
MAX793  2.5 to 3.3
Active High
Active Low
Open Drain
Push-Pull
 60
Adjustable Reset Input
Battery On
Chip Enable Gate
Low Line
Manual Reset
Power Fail Comparator
Watchdog
-40 to +85
0 to +70
PDIP(N)/16
SOIC(N)/16
 61.9 $3.74 @1k
MAX794 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active High
Active Low
Open Drain
Push-Pull
 60
Adjustable Reset Input
Battery On
Chip Enable Gate
Low Line
Manual Reset
Power Fail Comparator
Watchdog
PDIP(N)/16
SOIC(N)/16
 61.9 $3.74 @1k
MAX795  2.5 to 3.3
Active Low
Open Drain
 50
Battery On
Chip Enable Gate
PDIP(N)/8
SOIC(N)/8
 30.9 $3.66 @1k
See All Battery Backup Circuits (86)
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

MAX793, MAX793R, MAX793S, MAX793T, MAX794, MAX795, MAX795R, MAX795S, MAX795T: Typical Operating Circuit
Typical Operating Circuit

Application Notes

Application Note 655   Supervisor ICs Monitor Battery-Powered Equipment

Product Guides

Thermal Management (PDF)
Wireless (PDF)

Reliability Reports

Reliability Report: MAX794.pdf MAX793T.pdf MAX795T.pdf
Show FIT data for:
Request Reliability Report for:
Underwriters Laboratories (UL) Recognized

Software/Models

MAX793 IBIS Model

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Devices: 51-86 / 86 <-- Previous   1 2  Next -->
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX795RCPA  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795RCPA+  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795RCSA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795RCSA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795RCSA+T    
Active N.SO;8 pin

Land Pattern: Not Available

0°C to +70°C See data sheet
MAX795RCSA-T    
Active N.SO;8 pin

Land Pattern: Not Available

0°C to +70°C See data sheet
MAX795REPA    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795REPA+    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795RESA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795RESA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°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
MAX795RESA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795RESA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX795SCPA    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795SCPA+  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795SCSA  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795SCSA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795SCSA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795SCSA-T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795SEPA    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795SEPA+  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
-40°C to +85°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
MAX795SESA  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795SESA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795SESA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795SESA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX795TCPA    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795TCPA+  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TCSA  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX795TCSA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TCSA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TCSA-T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
0°C to +70°C RoHS/Lead-Free: No
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
MAX795TEPA    
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-3*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795TEPA+  
Active PDIP(N);8 pin;81.9 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+3*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TESA  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX795TESA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TESA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX795TESA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
Devices: 51-86 / 86 <-- Previous   1 2  Next -->

Notes:
  1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
  2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
  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.
  4. * 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.

Notes and Comments

MAX794 includes adjustable reset threshold

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Description
Key Features
Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
Application Notes
Evaluation Kits
Product Guides
Reliability Reports
Software/Models
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Samples
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Document Ref.: 19-0366 Rev 6; 2010-03-29
This page last modified: 2011-01-17

 


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