美信 RS232接口芯片 MAX3222-MAX3241手册

美信 RS232接口芯片 MAX3222-MAX3241 手册

General Description

The MAX3222/MAX3232/MAX3237/MAX3241 transceivers

have a proprietary low-dropout transmitter output stage

enabling true RS-232 performance from a 3.0V to 5.5V

supply with a dual charge pump. The devices require only

four small 0.1μF external charge-pump capacitors. The

MAX3222, MAX3232, and MAX3241 are guaranteed to

run at data rates of 120kbps while maintaining RS-232

output levels. The MAX3237 is guaranteed to run at data

rates of 250kbps in normal operating mode and 1Mbps in

the MegaBaud™ operating mode.

The MAX3222/MAX3232 have 2 receivers and 2 drivers.

The MAX3222 and MAX3232 are pin, package, and functionally

compatible with the industry-standard MAX242

and MAX232, respectively.

The MAX3241 has 5 receivers and 3 drivers, while the

MAX3237 has 3 receivers and 5 drivers. Receivers R1

(MAX3237/MAX3241) and R2 (MAX3241) have extra

outputs in addition to their standard outputs. These extra

outputs are always active, allowing external devices to be

monitored without forward biasing the protection diodes in

circuitry that may have VCC completely removed.

The MAX3222, MAX3232, and MAX3241 are available in

space-saving TSSOP and SSOP packages with operating

temperatures of either -40°C to +85°C or 0°C to 70°C.

Applications

●● Battery-Powered Equipment

●● Hand-Held Equipment

●● Peripherals

●● Datacom Equipment

Benefits and Features

●● Integrated Features Saves Board Space and

Simplifies Design

• Charge Pump Circuitry Eliminates the Need for a

Bipolar ±12V Supply

• Wide Single-Supply Operation From +3V to +5.5V

Supply

• Always-On Extra Outputs Enable Monitoring of

External Devices

●● Power Saving Extends Battery Life

• 1μA Supply Current in Shutdown Mode While

Receiver is Active (MAX3222, MAX3237, MAX3241)

Ordering Information continued at end of data sheet.

Typical Operating Circuits appear at end of data sheet. Pin Configurations continued at end of data sheet.

MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc.

*Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents

pending.

19-0273; Rev 10; 5/19

+Denotes lead-free package.

PART TEMP RANGE PINPACKAGE

PKG

CODE

MAX3222CUP+ 0°C to +70°C 20 TSSOP U20+2

MAX3222CAP+ 0°C to +70°C 20 SSOP A20+1

MAX3222CWN+ 0°C to +70°C 18 SO W18+1

MAX3222CPN+ 0°C to +70°C 18 Plastic Dip P18+5

Ordering Information

Pin