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MAX4824 Dataheets PDF



Part Number MAX4824
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description (MAX4822 - MAX4825) 8-Channel Relay Drivers
Datasheet MAX4824 DatasheetMAX4824 Datasheet (PDF)

19-3789; Rev 0; 8/05 +3.3V/+5V, 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode General 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 2.7Ω (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-kick.

  MAX4824   MAX4824


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19-3789; Rev 0; 8/05 +3.3V/+5V, 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode General 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 2.7Ω (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 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 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 www.DataSheet4U.com these devices to be used with slow-rising and falling signals, such as those from optocouplers or RC powerup 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. Features ♦ 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 5Ω (max) RON ♦ SET / RESET 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 MAX4822–MAX4825 Ordering Information PART MAX4822ETP MAX4823ETP MAX4824ETP MAX4825ETP TEMP RANGE PINPACKAGE PACKAGE CODE T2044-3 T2044-3 T2044-3 T2044-3 -40°C to +85°C 20 TQFN-EP* -40°C to +85°C 20 TQFN-EP* -40°C to +85°C 20 TQFN-EP* -40°C to +85°C 20 TQFN-EP* *For maximum heat dissipation, packages have an exposed pad (EP) on the bottom. Solder exposed pad to GND. Applications ATE Equipment DSL Redundancy Protection (ADSL/VDSL/HDSL) T1/E1 Redundancy Protection T3/E3 Redundancy Protection Industrial Equipment Test Equipment (Oscilloscopes, Spectrum Analyzers) SPI is a trademark of Motorola, Inc. QSPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. PART MAX4822 MAX4823 MAX4824 MAX4825 Serial Serial Parallel Parallel Selector Guide INTERFACE POWER SAVE Yes No Yes No Pin Configurations appear at end of data sheet. 1 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. +3.3V/+5V, 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode MAX4822–MAX4825 ABSOLUTE MAXIMUM RATINGS VCC ........................................................................-0.3V to +6.0V OUT_ ......................................................................-0.3V to +11V CS, SCLK, DIN, SET, RESET, A0, A1, A2, LVL......-0.3V to +6.0V DOUT..........................................................-0.3V to (VCC + 0.3V) PSAVE ........................................................-0.3V to (VCC + 0.3V) Continuous OUT_ Current (all outputs turned on) ............150mA Continuous OUT_ Current (single output turned on) ........300mA Continuous Power Dissipation (TA = +70°C) 20-Lead Thin QFN (derate 16.9mW/°C above +70°C) ..1350mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Soldering Temperature (10s) ...........................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sec.


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