Maxim > Products > Interface, Interconnect, Signal Integrity > MAX250, MAX251

MAX250, MAX251

5V, Isolated, RS-232 Driver Receiver

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX250 and MAX251 chip set form the heart of a complete, electronically isolated, RS-232 dual transmitter/receiver. By combining many functions on two chips, the cost and complexity required for an isolated digital interface is greatly reduced. Four low cost optocouplers, four capacitors, a diode and a small pot-core type transformer are all that are required to complete a 19.2k baud transceiver. Faster data rates are possible by using high speed optocouplers. In addition to the driving and receiving circuitry for the optocouplers, the chip set includes a push-pull transformer driver to supply power to the interface's isolated side.

Other convenient features include single +5V operation, a low power shutdown mode, and output enable control for three-state operation. The MAX250 and MAX251 are supplied in 14 lead DIP, 14 lead small outline and 20 leadless chip carrier packages.

The MAX252 has all the required components for RS-232 communication in a single package.

Data Sheet

Download	Rev 0	(PDF, 428kB)
E-Mail

Key Features

Isolated Data Interface
Single +5V Supply
Uses Low Cost Optocouplers
5µW Power Shutdown
2 Transmitters and 2 Receivers

Applications/Uses

Bridge Ground Differentials
Data Links To Analog Circuits
High Noise Data Communications
Industrial Communications

Key Specifications:

RS-232 Line Driver/Receivers

Part Number

V_SUPPLY
(V)

Data Rate
(kbps)

I_CC
(mA)

Internal Charge Pump

Package/Pins

Budgetary Price

min

typ

See Notes

MAX250

116

0.1

Yes

MAX251

See All RS-232 Line Driver/Receivers (152)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Pin Configuration

Product Guides

Interface (PDF)

Reliability Reports

Reliability Report:	MAX250.pdf MAX251.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX250C/D			Active	DICE SALES;NA pin;DICE; Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX250CPD			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX250CPD+			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250CSD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX250CSD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250CSD+T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250CSD-T			Active	N.SO;14 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX250EJD			Active	CDIP(N);14 pin;162.1 mm² Outline Drawing:21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J14-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX250EPD			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX250EPD+			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX250ESD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX250ESD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250ESD+G071			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250ESD+T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250ESD+TG071			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX250ESD-T			Active	N.SO;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX251C/D			Active	DICE SALES;NA pin;DICE; Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX251CPD			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14-3*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX251CPD+			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251CSD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX251CSD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251CSD+T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251CSD-T			Active	N.SO;14 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX251EJD			Active	CDIP(N);14 pin;162.1 mm² Outline Drawing:21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J14-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX251EPD			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX251EPD+			Active	PDIP(N);14 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P14+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251ESD			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX251ESD+			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251ESD+G071			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251ESD+T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX251ESD+TG071			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX251ESD-C78042			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX251ESD-T			Active	SOIC(N);14 pin;54.2 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0112 (PDF) Use pkgcode/variation: S14-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Notes and Comments

Isolated RS-232 chipset

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-1275 Rev 0; 1989-07-01
This page last modified: 2009-11-09