Maxim > Products > Interface, Interconnect, Signal Integrity > MAX218

MAX218

1.8V to 4.25V Powered, True RS-232 Dual Transceiver

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX218 RS-232 transceiver is intended for battery-powered EIA/TIA-232E and V.28/V.24 communications interfaces that need two drivers and two receivers with minimum power consumption. It provides a wide +1.8V to +4.25V operating voltage range while maintaining true RS-232 and EIA/TIA-562 voltage levels. The MAX218 runs from two alkaline, NiCd, or NiMH cells without any form of voltage regulator.

A shutdown mode reduces current consumption to 1µA, extending battery life in portable systems. While shut down, all receivers can remain active or can be disabled under logic control, permitting a system incorporating the CMOS MAX218 to monitor external devices while in low-power shutdown mode.

A guaranteed 120kbps data rate provides compatibility with popular software for communicating with personal computers. Three-state drivers are provided on all receiver outputs so that multiple receivers, generally of different interface standards, can be wire-ORed at the UART. The MAX218 is available in 20-pin DIP, SO, and SSOP packages.

Data Sheet

Download	Rev 1	(PDF, 93kB)
E-Mail

Key Features

BETTER THAN BIPOLAR!

Operates Directly from Two Alkaline, NiCd, or NiMH Cells
+1.8V to +4.25V Supply Voltage Range
120kbps Data Rate
Low-Cost Surface-Mount Components
Meets EIA/TIA-232E Specifications
1µA Low-Power Shutdown Mode
Both Receivers Active During Low-Power Shutdown
Three-State Receiver Outputs
Flow-Through Pinout
On-Board DC-DC Converters
20-Pin SSOP, Wide SO, or DIP Packages

Applications/Uses

Battery-Powered Applications
Computers: Desktop, Workstation, Server
Instruments
Modems
Peripherals
Printers

Key Specifications:

RS-232 Line Driver/Receivers

Part Number

V_SUPPLY
(V)

Data Rate
(kbps)

I_CC
(mA)

Internal Charge Pump

Ext. Caps

Cap. Value
(µF)

Rx Active in Shutdn

Package/Pins

Budgetary Price

min

typ

nom

See Notes

MAX218

1.8

120

1.9

Yes

0.33/0.68

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

Typical Operating Circuit

Application Notes

Application Note 654		New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation
Tutorial 2141		Determining Clock Accuracy Requirements for UART Communications
Application Note 3741		Analog ICs for Low Voltage Systems

Product Guides

Interface (PDF)

Reliability Reports

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Software/Models

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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
MAX218C/D			Active	DICE SALES;NA pin;DICE; Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX218CAP			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20-1*	0°C to +70°C	See data sheet
MAX218CAP+			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218CAP+T			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218CAP-T			Active	SSOP;20 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX218CPP			Active	PDIP(N);20 pin;219.2 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20-4*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX218CPP+			Active	PDIP(N);20 pin;219.2 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20+4*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218CWP			Active	SOIC(W);20 pin;138.5 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0108 (PDF) Use pkgcode/variation: W20-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX218CWP+			Active	SOIC(W);20 pin;138.5 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0108 (PDF) Use pkgcode/variation: W20+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218CWP+T			Active	SOIC(W);20 pin;138.5 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0108 (PDF) Use pkgcode/variation: W20+2*	0°C to +70°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
MAX218CWP-T			Active	W.SO;20 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX218EAP			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20-1*	-40°C to +85°C	See data sheet
MAX218EAP+			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218EAP+T			Active	SSOP;20 pin;57.9 mm² Outline Drawing:21-0056 (PDF) Land Pattern: 90-0094 (PDF) Use pkgcode/variation: A20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218EAP-T			Active	SSOP;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX218EPP			Active	PDIP(N);20 pin;219.2 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX218EPP+			Active	PDIP(N);20 pin;219.2 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P20+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX218EWP			Active	SOIC(W);20 pin;138.5 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0108 (PDF) Use pkgcode/variation: W20-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX218EWP-T			Active	W.SO;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

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

Operates directly from batteries without a voltage regulator

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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.: 19-0246 Rev 1; 1995-07-01
This page last modified: 2007-07-17