1 Features
• ESD protection for RS-232 bus pins
– ±15kV (HBM)
– ±8kV (IEC61000-4-2, Contact discharge)
– ±15kV (IEC61000-4-2, Air-gap discharge)
• Meets or exceeds the requirements of TIA/
EIA-232-F and ITU V.28 standards
• Operates with 3V to 5.5V VCC supply
– Interoperable with RS-232 down to 2.7V VCC
• Operates up to 250kbps
• Two drivers and two receivers
• Low supply current: 300μA (typical)
• External capacitors: 4 × 0.1μF
• Accepts 5V logic input with 3.3V supply
• Available in near chip-scale package (QFN-16,
3mm x 3mm), 85% smaller than SOIC-16
• Pin compatible to alternative high-speed devices
(1Mbps)
– SN65C3232E (–40°C to +85°C)
– SN75C3232E (0°C to 70°C)

2 Applications
• Industrial PCs
• Wired networking
• Data center and enterprise computing
• Battery-powered systems
• Notebooks
• Palmtop PCs
• Hand-held equipment

3 Description
The TRS3232E device consists of two line drivers,
two-line receivers, and a dual charge-pump circuit
with ±15kV IEC ESD protection pin to pin (serial-port
connection pins, including GND).
The device meets the requirements of TIA/EIA-232-
F 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 3V
to 5.5V supply. The devices operate at data signaling
rates up to 250kbps and a maximum of 30V/μs driver
output slew rate.