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Maxim > Products > [Analog Switches and Multiplexers] 
MAX4822, MAX4823, MAX4824, MAX4825
+3.3V/+5V, 8-Channel, Relay Drivers with Fast Recovery Time and Power-Save Mode

Octal Relay Drivers for Non-Latching Relays or Dual-Coil Latching Relays


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 740kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX4822–MAX4825 8-channel relay drivers offer built-in kickback protection and drive +3V/+5V nonlatching or dual-coil-latching relays. Each independent open-drain output features a 2.7 (typ) on-resistance and is guaranteed to sink 70mA (min) of load current. These devices consume less than 300µA (max) quiescent current and have 1µA output off-leakage current. A Zener-kickback-protection circuit significantly reduces recovery time in applications where switching speed is critical.

The MAX4822/MAX4824 feature a unique power-save mode where the relay current, after activation, can be reduced to a level just above the relay hold-current threshold. This mode keeps the relay activated while significantly reducing the power consumption.

The MAX4822/MAX4823 feature a 10MHz SPI™-/ QSPI™-/MICROWIRE™-compatible serial interface. Input data is shifted into a shift register and latched to the outputs when CS-bar transitions from low to high. Each data bit in the shift register corresponds to a specific output, allowing independent control of all outputs.

The MAX4824/MAX4825 feature a 4-bit parallel-input interface. The first 3 bits (A0, A1, A2) determine the output address, and the fourth bit (LVL) determines whether the selected output is switched on or off. Data is latched to the outputs when CS-bar transitions from low to high.

The MAX4822–MAX4825 feature separate set and reset functions, allowing turn-on or turn-off of all outputs simultaneously with a single control line. Built-in hysteresis (Schmidt trigger) on all digital inputs allows these devices to be used with slow-rising and falling signals, such as those from optocouplers or RC power-up initialization circuits. The MAX4822–MAX4825 are available in space-saving 4mm x 4mm, 20-pin thin QFN packages. They are specified over the -40°C to +85°C extended temperature range.

Key Features   Applications/Uses
  		• Built-In Zener Kickback Protection for Fast Recovery
  		• Programmable Power-Save Mode Reduces Relay Power Consumption (MAX4822/MAX4824)
  		• 10MHz SPI-/QSPI-/MICROWIRE-Compatible Serial Interface
  		• Eight Independent Output Channels
  		• Drive +3V and +5V Relays
  		• Guaranteed 70mA (min) Coil Drive Current
  		• Guaranteed 5 (max) RON
  		• SET-bar / RESET-bar Functions to Turn On/Off All Outputs Simultaneously
  		• Serial Digital Output for Daisy Chaining
  		• Optional Parallel Interface (MAX4824/MAX4825)
  		• Low 300µA (max) Quiescent Supply Current
  		• Space-Saving, 4mm x 4mm, 20-Pin TQFN Package

    		  
  		• ATE Equipment
  		• DSL Redundancy Protection (ADSL/VDSL/HDSL)
  		• Industrial Equipment
  		• T1/E1 Redundancy Protection
  		• T3/E3 Redundancy Protection
  		• Test Equipment (Oscilloscopes, Spectrum Analyzers)

    Key Specifications:  Relay Drivers
    Part Number ISOURCE @2.7V
    (mA)    		 RON @2.7V
    (Ω)    		 IQ
    (µA)    		 Features Channels Interface VSUPPLY
    (V)    		 Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    guar. min max max max w/pins See Notes
    MAX4822  70 6 160
    Daisy-Chainable
    Integrated Kickback Diodes
    Power On Reset
    Power-Save
    Thermal Shutdown
    		 8 SPI 2.3 to 5.5
    TQFN/20
    		 17 $1.85 @1k
    MAX4823 
    Daisy-Chainable
    Integrated Kickback Diodes
    Power On Reset
    Thermal Shutdown
    		 SPI
    TQFN/20
    		 $1.85 @1k
    MAX4824 
    Daisy-Chainable
    Integrated Kickback Diodes
    Power On Reset
    Power-Save
    Thermal Shutdown
    		 Parallel
    TQFN/20
    		 $1.85 @1k
    MAX4825 
    Daisy-Chainable
    Integrated Kickback Diodes
    Power On Reset
    Thermal Shutdown
    		 Parallel
    TQFN/20
    TSSOP-EP/20
    		 $1.85 @1k
    See All Relay Drivers (7)

    Diagram
    MAX4822, MAX4823, MAX4824, MAX4825: Pin Configurations
    Pin Configurations

    Application Notes
  		• Application Note 3951: Power-Save Mode Reduces Power Consumption When Driving Relays - MAX4822, MAX4824

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    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. More: SeeFull Data Sheet or Part 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.


    Devices: 1-18 of 18

    MAX4822 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4822ETP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4822ETP+  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4822ETP  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4822ETP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4823 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4823ETP+  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4823ETP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4823ETP  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4823ETP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4824 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4824ETP+  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4824ETP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4824ETP  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4824ETP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4825 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4825ETP  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4825ETP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4825ETP+  
    		Active TQFN;20 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0037 (PDF)
    Use pkgcode/variation: T2044+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4825ETP+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4825EUP    
    		Active TSSOP-EP;20 pin;43 mm²
    Outline Drawing: 21-0108 (PDF)
    Land Pattern: 90-0114 (PDF)
    Use pkgcode/variation: U20E-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4825EUP-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

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    Document Ref.: 19-3789; Rev 0; 2005-10-10
    This page last modified: 2009-08-04


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