MAX4822MAX4825 19-3789 Rev 0 8/05 +3.3V/+5V, 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode General Description Features The MAX4822MAX4825 8-channel relay drivers offer Built-In Zener Kickback Protection for Fast built-in kickback protection and drive +3V/+5V non- Recovery latching or dual-coil-latching relays. Each independent Programmable Power-Save Mode Reduces Relay open-drain output features a 2.7 (typ) on-resistance Power Consumption (MAX4822/MAX4824) and is guaranteed to sink 70mA (min) of load current. These devices consume less than 300A (max) quies- 10MHz SPI-/QSPI-/MICROWIRE-Compatible Serial cent current and have 1A output off-leakage current. Interface A Zener-kickback-protection circuit significantly Eight Independent Output Channels reduces recovery time in applications where switching speed is critical. Drive +3V and +5V Relays The MAX4822/MAX4824 feature a unique power-save Guaranteed 70mA (min) Coil Drive Current mode where the relay current, after activation, can be Guaranteed 5 (max) R ON reduced to a level just above the relay hold-current SET / RESET Functions to Turn On/Off All threshold. This mode keeps the relay activated while significantly reducing the power consumption. Outputs Simultaneously The MAX4822/MAX4823 feature a 10MHz SPI-/ Serial Digital Output for Daisy Chaining QSPI-/MICROWIRE-compatible serial interface. Optional Parallel Interface (MAX4824/MAX4825) Input data is shifted into a shift register and latched to the outputs when CS transitions from low to high. Each Low 300A (max) Quiescent Supply Current data bit in the shift register corresponds to a specific Space-Saving, 4mm x 4mm, 20-Pin TQFN Package 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 out- put address, and the fourth bit (LVL) determines whether the selected output is switched on or off. Data is latched Ordering Information to the outputs when CS transitions from low to high. PIN- PACKAGE The MAX4822MAX4825 feature separate set and reset PART TEMP RANGE PACKAGE CODE functions, allowing turn-on or turn-off of all outputs simultaneously with a single control line. Built-in hys- MAX4822ETP -40C to +85C 20 TQFN-EP* T2044-3 teresis (Schmidt trigger) on all digital inputs allows MAX4823ETP -40C to +85C 20 TQFN-EP* T2044-3 these devices to be used with slow-rising and falling MAX4824ETP -40C to +85C 20 TQFN-EP* T2044-3 signals, such as those from optocouplers or RC power- MAX4825ETP -40C to +85C 20 TQFN-EP* T2044-3 up initialization circuits. The MAX4822MAX4825 are available in space-saving 4mm x 4mm, 20-pin thin QFN *For maximum heat dissipation, packages have an exposed packages. They are specified over the -40C to +85C pad (EP) on the bottom. Solder exposed pad to GND. extended temperature range. Applications ATE Equipment DSL Redundancy Protection (ADSL/VDSL/HDSL) Selector Guide T1/E1 Redundancy Protection T3/E3 Redundancy Protection PART INTERFACE POWER SAVE Industrial Equipment MAX4822 Serial Yes Test Equipment (Oscilloscopes, Spectrum MAX4823 Serial No Analyzers) MAX4824 Parallel Yes MAX4825 Parallel No SPI is a trademark of Motorola, Inc. QSPI is a trademark of Motorola, Inc. Pin Configurations appear at end of data sheet. MICROWIRE is a trademark of National Semiconductor Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.+3.3V/+5V, 8-Channel Relay Drivers with Fast Recovery Time and Power-Save Mode ABSOLUTE MAXIMUM RATINGS V ........................................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) CC A OUT ......................................................................-0.3V to +11V 20-Lead Thin QFN (derate 16.9mW/C above +70C) ..1350mW CS, SCLK, DIN, SET, RESET, A0, A1, A2, LVL......-0.3V to +6.0V Operating Temperature Range ...........................-40C to +85C DOUT..........................................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC PSAVE ........................................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC Continuous OUT Current (all outputs turned on) ............150mA Soldering Temperature (10s)...........................................+300C Continuous OUT Current (single output turned on) ........300mA 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 sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at V = 2.7V, T = +25C, unless otherwise CC A CC A noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage V 2.3 5.5 V CC V = 3.6V 160 300 I = 0, CC OUT Quiescent Current I A CC logic inputs = 0 or V CC V = 5.5V 180 300 CC V = 3.6V 1.2 CC Dynamic Supply Current I f =10MHz, C = 50pF mA D SCLK DOUT V = 5.5V 1.6 CC Power-save disable threshold (Note 2) +130 Thermal Shutdown C Output disable threshold (Note 3) +150 Power-On Reset Transform from high voltage to low voltage 0.6 1.2 2.0 V Power-On Reset Hysteresis 140 mV DIGITAL INPUTS (SCLK, DIN, CS, LVL, A0, A1, A2, RESET, SET) V = 2.7V to 3.6V 2.0 CC Input Logic-High Voltage V V IH V = 4.2V to 5.5V 2.4 CC V = 2.7V to 3.6V 0.6 CC Input Logic-Low Voltage V V IL V = 4.2V to 5.5V 0.8 CC Input Logic Hysteresis V 150 mV HYST Input Leakage Current I Input voltages = 0 or 5.5V -1.0 +0.01 +1.0 A LEAK Input Capacitance C 5pF IN DIGITAL OUTPUT (DOUT) DOUT Low Voltage V I = 6mA 0.4 V OL SINK V - CC DOUT High Voltage V I = 0.5mA V OH SOURCE 0.5 2 MAX4822MAX4825