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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4824 Datasheet

(MAX4822 - MAX4825) 8-Channel Relay Drivers

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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 non-
latching 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) quies-
cent 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 out-
put 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 hys-
www.DtaetraeSshieset(4SUc.chomm idt 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.
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 5(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
Ordering Information
PART
TEMP RANGE PIN-
PACKAGE
PACKAGE
CODE
MAX4822ETP -40°C to +85°C 20 TQFN-EP* T2044-3
MAX4823ETP -40°C to +85°C 20 TQFN-EP* T2044-3
MAX4824ETP -40°C to +85°C 20 TQFN-EP* T2044-3
MAX4825ETP -40°C to +85°C 20 TQFN-EP* T2044-3
*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.
Selector Guide
PART
MAX4822
MAX4823
MAX4824
MAX4825
INTERFACE
Serial
Serial
Parallel
Parallel
POWER SAVE
Yes
No
Yes
No
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4824 Datasheet

(MAX4822 - MAX4825) 8-Channel Relay Drivers

No Preview Available !

+3.3V/+5V, 8-Channel Relay Drivers with Fast
Recovery Time and Power-Save Mode
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 sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 2.7V, TA = +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Operating Voltage
VCC
Quiescent Current
ICC
IOUT_ = 0,
logic inputs = 0 or VCC
VCC = 3.6V
VCC = 5.5V
Dynamic Supply Current
ID
fSCLK =10MHz, CDOUT = 50pF
VCC = 3.6V
VCC = 5.5V
Thermal Shutdown
Power-save disable threshold (Note 2)
Output disable threshold (Note 3)
Power-On Reset
Transform from high voltage to low voltage
Power-On Reset Hysteresis
DIGITAL INPUTS (SCLK, DIN, CS, LVL, A0, A1, A2, RESET, SET)
Input Logic-High Voltage
www.DataSheet4U.com
Input Logic-Low Voltage
VIH
VCC = 2.7V to 3.6V
VCC = 4.2V to 5.5V
VIL
VCC = 2.7V to 3.6V
VCC = 4.2V to 5.5V
Input Logic Hysteresis
VHYST
Input Leakage Current
ILEAK Input voltages = 0 or 5.5V
Input Capacitance
DIGITAL OUTPUT (DOUT)
CIN
DOUT Low Voltage
VOL ISINK = 6mA
DOUT High Voltage
VOH
ISOURCE = 0.5mA
MIN
2.3
0.6
2.0
2.4
-1.0
VCC -
0.5
TYP
160
180
1.2
1.6
+130
+150
1.2
140
150
+0.01
5
MAX
5.5
300
300
2.0
0.6
0.8
+1.0
0.4
UNITS
V
µA
mA
°C
V
mV
V
V
mV
µA
pF
V
V
2 _______________________________________________________________________________________


Part Number MAX4824
Description (MAX4822 - MAX4825) 8-Channel Relay Drivers
Maker Maxim Integrated Products
PDF Download

MAX4824 Datasheet PDF






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