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MAX3229

+2.5V to +5.5V RS-232 Tranceivers in UCSP

Please check latest availability status for a specific part variant.

Overview

Description

The MAX3228/MAX3229 are +2.5V to +5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces with low power requirements, and high data-rate capabilities, in a chip-scale package (UCSP™).

The MAX3228/MAX3229 achieve a 1µA supply current with Maxim's AutoShutdown™ feature. They save power without changes to existing BIOS or operating systems by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off.

The transceivers have a proprietary low-dropout transmitter output stage, delivering RS-232 compliant performance from a +3.1V to +5.5V supply, and RS-232 compatible performance with a supply voltage as low as +2.5V. The dual charge pump requires only four small 0.1µF capacitors for operation from a +3.0V supply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.

The MAX3228/MAX3229 offer a separate power-supply input for the logic interface, allowing configurable logic levels on the receiver outputs and transmitter inputs. Operating over a +1.65V to V_CC range, V_L provides the MAX3228/MAX3229 compatibility with multiple logic families.

The MAX3229 contains one receiver and one transmitter. The MAX3228 contains two receivers and two transmitters. The MAX3228/MAX3229 are available in tiny chip-scale packaging and are specified across the extended industrial temperature range of -40°C to +85°C.

MAX3228, MAX3229: Typical Operating Circuit

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Key Features

6 x 5 Chip-Scale Packaging (UCSP)
1µA Low-Power AutoShutdown
250kbps Guaranteed Data Rate
Meets EIA/TIA-232 Specifications Down to +3.1V
RS-232 Compatible to +2.5V Allows Operation from Single Li+ Cell
Small 0.1µF Capacitors
Configurable Logic Levels

Applications/Uses

Cell Phones
Cellular Data Cables
Handheld Devices
PDAs and Other Handheld Devices
Set-Top Boxes

Parametric Specs

See parametric specs for RS-232 Line Driver/Receivers (136)

Part Number

V_SUPPLY
(V)

Data Rate
(kbps)

I_CC
(mA)

Internal Charge Pump

External Caps

Cap. Value
(µF)

Rx Active in Shutdn

Package/Pins

min

typ

nom

MAX3228

2.5

3.3

250

0.3

Yes

0.1

MAX3229

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Technical Documents

Tutorial 2141 Determining Clock Accuracy Requirements for UART Communications

Quality And Environmental

Request Reliability Report for: MAX3229

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C	Material Composition

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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