MAX4820

更新时间： 2024-11-30 22:39:19

品牌	Logo	应用领域
美信 - MAXIM		驱动器继电器
页数	文件大小	规格书
13页	343K
描述
+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface

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MAX4820 数据手册

19-2751; Rev 0; 1/03

+3.3V/+5V, 8-Channel, Cascadable Relay Drivers

with Serial/Parallel Interface

General Description

Features

The MAX4820/MAX4821 8-channel relay drivers offer

built-in kickback protection and drive +3.3V/+5V non-

latching or dual-coil-latching relays. These devices are

especially useful when driving +3V relays. Each inde-

pendent open-drain output features a 2Ω on-resistance

and is guaranteed to sink 70mA (min) of load current.

Both devices consume less than 50µA (max) quiescent

current and have 1µA output off-leakage current.

ꢀ 8 Independent Output Channels

ꢀ Built-In Inductive Kickback Protection

ꢀ Drive +3V and +5V Relays

ꢀ Guaranteed 70mA (min) Coil Drive Current

ꢀ SET Function to Turn On All Outputs

Simultaneously

The MAX4820 features an SPI™-/QSPI™-/MICROWIRE™-

compatible serial interface. Input data is shifted into an 8-

bit shift register and latched to the outputs when CS

transitions from low to high. Each data bit in the shift reg-

ister corresponds to a specific output, allowing indepen-

dent control of all outputs.

ꢀ RESET Function to Turn Off All Outputs

Simultaneously

ꢀ SPI-/QSPI-/MICROWIRE-Compatible Serial

Interface (MAX4820)

ꢀ Serial Digital Output for Daisy Chaining

The MAX4821 features a 4-bit (A0, A1, A2, LVL) paral-

lel-input interface. The first three bits (A0, A1, A2) deter-

mine 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 transi-

tions from low to high.

(MAX4820)

ꢀ Parallel Interface (MAX4821)

ꢀ Low 50µA (max) Quiescent Supply Current

ꢀ Space-Saving 20-Pin Thin QFN Package

Both devices feature separate set and reset functions

that allow the user to turn on or turn off all outputs simul-

taneously with a single control line. Built-in hysteresis

(Schmidt trigger) on all digital inputs allows this device

to be used with slow rising and falling signals, such as

those from optocouplers or RC power-up initialization

circuits. The MAX4820/MAX4821 are available in 20-pin

TSSOP and space-saving 20-pin thin QFN packages.

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

20 Thin QFN-EP

20 TSSOP

MAX4820ETP*

MAX4820EUP*

MAX4821ETP*

MAX4821EUP*

20 Thin QFN-EP

20 TSSOP

Applications

Central Office

*For maximum heat dissipation, packages have an exposed pad

(EP) on the bottom. Solder exposed pad to GND.

ATE

Pin Configurations

DSL, ADSL Line Cards

Industrial Equipment

E1/T1 Redundancy

TOP VIEW

RESET

15 OUT3

14 OUT4

13 COM

12 OUT5

Pin Configurations continued at end of data sheet.

DIN

MAX4820

Typical Application Circuits and Functional Diagrams

appear at end of data sheet.

SCLK

DOUT

OUT6

SPI and QSPI are trademarks of Motorola, Inc.

THIN QFN

MICROWIRE is a trademark of National Semiconductor Corp.

________________________________________________________________ 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.

12 3 4 5 6 7...13

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与MAX4820相关器件

型号	品牌	获取价格	描述	数据表
MAX4820_09	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820_10	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820ETP	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820ETP+	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820ETP+T	MAXIM	获取价格	Buffer/Inverter Based Peripheral Driver, 8 Driver, BICMOS, 4 X 4 MM, 0.80 MM PITCH, MO-220
MAX4820ETP-T	MAXIM	获取价格	暂无描述
MAX4820EUP	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820EUP+	MAXIM	获取价格	+3.3V/+5V, 8-Channel, Cascadable Relay Drivers with Serial/Parallel Interface
MAX4820EUP+T	MAXIM	获取价格	暂无描述
MAX4820EUP-T	MAXIM	获取价格	Buffer/Inverter Based Peripheral Driver, 8 Driver, 0.07A, BICMOS, PDSO20, 4.40 MM, MO-153A

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