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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 200kB) Download   E-Mail

Description

The MAX3238* true RS-232 transceiver achieves a 1µA supply current with Maxim's revolutionary AutoShutdown Plus™ feature. When the device does not sense a valid signal transition on either the receiver or transmitter inputs within 30sec, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are inactive. The system turns on again when a valid transition is applied to any RS-232 receiver or transmitter input, saving power without changes to the existing BIOS or operating system. The MAX3238 5-driver/3-receiver complete serial port is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface intended for notebook or subnotebook computer applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 250kbps provides compatibility with popular software for communicating with personal computers. The MAX3238 requires only 0.1µF capacitors in 3.3V operation. It is ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5V-only systems that require true RS-232 performance. Receiver R1 has an extra, always-active output (in addition to its standard output), which allows external devices, such as a modem, to be monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed. The MAX3238 is available in a space-saving SSOP package.

Key Features		Applications/Uses
1µA Supply Current Achieved with AutoShutdown Plus Guaranteed Data Rate: 250kbps 1µA Low-Power Shutdown Receivers Active in AutoShutdown Plus Mode Flow-Through Pinout Meets EIA/TIA-232 Specifications Down to 3.0V Guaranteed 6V/µs Slew Rate Auto shutdown reduces supply current to 1uA		Battery-Powered Applications Handheld Equipment High-Speed Modems Notebook, Subnotebook, and Palmtop Computers Peripherals Printers

*Patents Pending

Diagram

Typical Operating Circuit

Application Notes

Application Note 2020: Choosing the Right RS-232 Transceiver - MAX3238 Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3238

Design Guides

Interface (PDF) Thermal Management (PDF)

Reliability Reports

Reliability Report: MAX3238.pdf Show FIT data for: MAX3238

Software/Models

none

Ordering Information

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. More: SeeFull Data Sheet or Part 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.

Devices: 1-8 of 8

MAX3238	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX3238CAI			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX3238CAI-T			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX3238CAI+			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX3238CAI+T			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX3238EAI			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX3238EAI-T			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX3238EAI+			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX3238EAI+T			Active	SSOP;28 pin;82 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0095 (PDF) Use pkgcode/variation: A28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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