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MAX4825

更新时间： 2024-12-02 14:57:39
品牌 Logo 应用领域
亚德诺 - ADI 驱动继电器驱动器
页数 文件大小 规格书
19页 733K
描述
+3.3V/+5V、8通道继电器驱动器，具有快速恢复和省电模式

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MAX4825 数据手册

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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  
Features  
♦ Built-In Zener Kickback Protection for Fast  
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 2.7Ω (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.  
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  
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.  
♦ Guaranteed 70mA (min) Coil Drive Current  
♦ Guaranteed 5Ω (max) R  
ON  
♦ SET / RESET Functions to Turn On/Off All  
Outputs Simultaneously  
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.  
♦ 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  
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.  
Ordering Information  
PIN-  
PACKAGE  
PACKAGE  
CODE  
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-  
teresis (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.  
PART  
TEMP RANGE  
MAX4822ETP  
MAX4823ETP  
MAX4824ETP  
MAX4825ETP  
-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*  
T2044-3  
T2044-3  
T2044-3  
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  
Selector Guide  
PART  
INTERFACE  
Serial  
POWER SAVE  
MAX4822  
MAX4823  
MAX4824  
MAX4825  
Yes  
No  
Serial  
Test Equipment (Oscilloscopes, Spectrum  
Analyzers)  
Parallel  
Parallel  
Yes  
No  
SPI is a trademark of Motorola, Inc.  
QSPI is a trademark of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corp.  
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.  
1234567...19

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