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MAX3221

Texas Instruments
Part Number MAX3221
Manufacturer Texas Instruments
Description 3-V to 5.5-V RS-232 Line Driver/Receiver
Published Mar 26, 2020
Detailed Description MAX3221 SLLS348P – JUNE 1999 – REVISED JULY 2021 MAX3221 3-V to 5.5-V RS-232 Line Driver and Receiver With ±15-kV ESD Pr...
Datasheet PDF File MAX3221 PDF File

MAX3221
MAX3221

Overview
MAX3221 SLLS348P – JUNE 1999 – REVISED JULY 2021 MAX3221 3-V to 5.
5-V RS-232 Line Driver and Receiver With ±15-kV ESD Protection 1 Features • RS-232 Bus-pin ESD protection exceeds ±15 kV using human body model (HBM) • Meets or exceeds the requirements of TIA/EIA-232-F and ITU V.
28 standards • Operates with 3-V to 5.
5-V VCC supply • Operates up to 250 kbps • One driver and one receiver • Low standby current: 1 μA typical • External capacitors: 4 × 0.
1 μF • Accepts 5-V logic input with 3.
3-V supply • Alternative high-speed pin-compatible device (1 Mbps) – SNx5C3221 • Automatic power-down feature automatically disables drivers for power savings 2 Applications • Industrial PCs • Wired networking • Data center and enterprise computing • Battery-powered systems • PDAs • Notebooks • Laptops • Palmtop PCs • Hand-held equipment 3 Description The MAX3221 device consists of one line driver, one line receiver with dedicated enable pin, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND).
The device meets the requirements of TIA/EIA-232F and provides the electrical interface between an asynchronous communication controller and the serial-port connector.
The charge pump and four small external capacitors allow operation from a single 3-V to 5.
5-V supply.
These devices operate at data signaling rates up to 250 kbps and a maximum of 30-V/μs driver output slew rate.
Flexible control options for power management are available when the serial port is inactive.
The automatic power-down feature functions when FORCEON is low and FORCEOFF is high.
During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled and the supply current is reduced to 1 μA.
The INVALID output notifies the user if an RS-232 signal is present at the receiver input.
Device Information PART NUMBER PACKAGE(1) BODY SIZE (NOM) MAX3221 SSOP (DB) (32) TSSOP (PW) (32) 6.
20 mm × ...


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