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MAX253ESA

更新时间： 2024-02-09 10:24:24

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
16页	232K
描述
Transformer Driver for Isolated RS-485 Interface

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MAX253ESA 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
Factory Lead Time：	18 weeks	风险等级：	5.56
接口集成电路类型：	INTERFACE CIRCUIT	峰值回流温度（摄氏度）：	NOT SPECIFIED
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

MAX253ESA 数据手册

19-0226; Rev 0; 1/94

Tra n s fo rm e r Drive r fo r

Is o la t e d RS -4 8 5 In t e rfa c e

MAX253

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

The MAX253 is a monolithic oscillator/power-driver,

specifically designed to provide isolated power for an

is ola te d RS-485 or RS-232 d a ta inte rfa c e . It

drives a center-tapped transformer primary from a 5V

or 3.3V DC p owe r s up p ly. The s e c ond a ry c a n b e

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

♦ 8-Pin DIP, SO, and µMAX Packages

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 e ns ure 50% d uty c yc le to e a c h of the s witc he s .

Internal delays are arranged to ensure break-before-

make action between the two switches.

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

shutdown state, disabling both the power switches and

oscillator.

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

PIN-PACKAGE

8 Plastic DIP

8 SO

________________________Ap p lic a t io n s

MAX253CPA

MAX253CSA

MAX253CUA

MAX253C/D

MAX253EPA

MAX253ESA

MAX253EUA

MAX253MJA

0°C to +70°C

Isolated RS-485/RS-232 Power-Supply

Transformer Driver

0°C to +70°C

8 µMAX

High Noise-Immunity Communications Interface

Isolated and/or High-Voltage Power Supplies

Bridge Ground Differentials

0°C to +70°C

Dice*

-40°C to +85°C

-55°C to +125°C

8 Plastic DIP

8 SO

8 µMAX

Medical Equipment

8 CERDIP**

Process Control

* Contact factory for dice specifications.

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

__________________P in Co n fig u ra t io n

__________Typ ic a l Op e ra t in g Circ u it

TOP VIEW

ON / OFF

OUTPUT

5V @ 200mA

GND1

GND2

MAX253

N.C.

FREQUENCY

SWITCH

GND1

GND2

DIP/SO/µMAX

________________________________________________________________ Maxim Integrated Products

Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .

12 3 4 5 6 7...16

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与MAX253ESA相关器件

型号	品牌	描述	获取价格	数据表
MAX253ESA/V	MAXIM	Transformer Driver for Isolated RS-485 Interface	获取价格
MAX253ESA/V+	MAXIM	Interface Circuit, CMOS, PDSO8, ROHS COMPLIANT, SOP-8	获取价格
MAX253ESA/V+T	MAXIM	Interface Circuit, CMOS, PDSO8, 0.150 INCH, SOP-8	获取价格
MAX253ESA+	MAXIM	Interface Circuit, CMOS, PDSO8, ROHS COMPLIANT, SOP-8	获取价格
MAX253ESA+T	MAXIM	暂无描述	获取价格
MAX253ESAV	MAXIM	MAX253 Transformer Driver for Isolated RS-485 Interface	获取价格

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