Skip to main content
Log in
Texas Instruments MAX3222ECDW — Interface & Transceivers

MAX3222ECDW RS-232 Transceiver, 500 kbps, 20-SOIC

MPNMAX3222ECDW
Active

Texas Instruments MAX3222ECDW RS-232 transceiver, full duplex, 2/2 drivers/receivers, 500 kbps data rate, 3V to 5.5V supply, 20-SOIC package, 0°C to 70°C operating temperature.

$2.5900Ref. price · indicative, final on quote
Texas Instruments MAX3222ECDW datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX3222ECDW specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Supply voltage3V ~ 5.5V
ProtocolRS232
Operating temperature0°C~70°C
DuplexFull
PackageTube
Data rate500kbps
Case20-SOIC (0.295\", 7.50mm Width)
Receiver hysteresis300 mV
Number of drivers (Receivers)2/2

Product details

500 kbps RS-232 link — what the data rate buys you

The 3V to 5.5V supply range lets it bridge legacy 5V logic and modern 3.3V controllers without a level shifter — one less rail to route.

Supply flexibility and receiver hysteresis

Rated from 3V to 5.5V, this transceiver works on a single 3.3V or 5V rail, or anywhere in between, which simplifies power distribution in mixed-voltage designs. The 300 mV receiver hysteresis cleans up noisy RS-232 lines — useful when the cable picks up motor-drive hash or passes near a switching supply.

Frequently asked questions

MAX3222ECDW vs MAX3222E: what is the difference?

The MAX3222ECDW is the 20-SOIC wide-body variant of the MAX3222E family. The base part number MAX3222E covers multiple package options; the 'DW' suffix specifically designates the 20-SOIC (0.295", 7.50mm width) surface-mount package. Electrical specs — 2/2 drivers/receivers, 500 kbps, 3V to 5.5V supply — are identical across the family.

Does MAX3222ECDW require external charge pump capacitors?

Yes. Like most RS-232 transceivers, the MAX3222ECDW uses an internal charge pump to generate the ±5.5V RS-232 levels from the single supply, and it requires external capacitors — typically four 0.1 µF to 1 µF ceramic caps — connected to the charge-pump pins. The exact values and pin connections are in the datasheet.

Is MAX3222ECDW compatible with 3.3V logic?

Yes. The 3V to 5.5V supply range includes 3.3V, and the logic inputs are 3.3V-compatible. At 3.3V VCC the part drives RS-232 output levels and accepts 3.3V logic inputs without extra level translation.