Datasheet > MAX253_09

MAX253_09

更新时间： 2024-11-18 05:49:03

品牌	Logo	应用领域
美信 - MAXIM		变压器驱动器
页数	文件大小	规格书
17页	826K
描述
Transformer Driver for Isolated RS-485 Interface

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MAX253_09 数据手册

19-0226; Rev 1; 8/09

Transformer Driver for

Isolated RS-485 Interface

MAX253

_______________General Description

____________________________Features

The MAX253 is a monolithic oscillator/power-driver,

specifically designed to provide isolated power for an

isolated RS-485 or RS-232 data interface. It

drives a center-tapped transformer primary from a 5V

or 3.3V DC power supply. The secondary can be

wound to provide any isolated voltage needed at power

levels up to 1W.

♦ Power-Supply Transformer Driver for Isolated

RS-485/RS-232 Data-Interface Applications

♦ Single +5V or +3.3V Supply

♦ Low-Current Shutdown Mode: 0.4µA

♦ Pin-Selectable Frequency: 350kHz or 200kHz

The MAX253 consists of a CMOS oscillator driving a

pair of N-channel power switches. The oscillator runs

at double the output frequency, driving a toggle flip-flop

to ensure 50% duty cycle to each of the switches.

Internal delays are arranged to ensure break-before-

make action between the two switches.

♦ 8-Pin DIP, SO, and µMAX Packages

The SD pin puts the entire device into a low-power

shutdown state, disabling both the power switches and

oscillator.

______________Ordering Information

PART

MAX253CPA

MAX253CSA

MAX253CUA

MAX253C/D

MAX253EPA

MAX253ESA

MAX253MJA

TEMP RANGE

0°C to +70°C

-40°C to +85°C

-55°C to +125°C

PIN-PACKAGE

8 Plastic DIP

8 SO

________________________Applications

Isolated RS-485/RS-232 Power-Supply

Transformer Driver

8 μMAX

Dice*

High Noise-Immunity Communications Interface

Isolated and/or High-Voltage Power Supplies

Bridge Ground Differentials

8 Plastic DIP

8 SO

8 CERDIP**

Medical Equipment

*Contact factory for dice specifications.

**Contact factory for availability and processing to MIL-STD-883.

Process Control

__________________Pin Configuration

__________Typical Operating Circuit

ON / OFF

TOP VIEW

OUTPUT

5V @ 200mA

GND1

MAX253

GND2

MAX253

FREQUENCY

SWITCH

N.C.

GND1

GND2

DIP/SO/μMAX

µMAX is a registered trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...17

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与MAX253_09相关器件

型号	品牌	获取价格	描述	数据表
MAX253_10	MAXIM	获取价格	Transformer Driver for Isolated RS-485 Interface
MAX2530	MAXIM	获取价格	PLASTIC ENCAPSULATED DEVICES
MAX25300A	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300A	ADI	获取价格	12μVRMS, Low-Noise, 500mA LDO Linear Regulato
MAX25300AATA	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300B	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300B	ADI	获取价格	12μVRMS, Low-Noise, 500mA LDO Linear Regulato
MAX25300BATA	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300EVKIT	MAXIM	获取价格	Two Independent Circuits on One Board
MAX25301A	MAXIM	获取价格	1.7V to 5.5V Input Range

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