This is information on a product in full production.
July 2013 DocID9101 Rev 4 1/21
ST1480AB
ST1480AC
3.3 V powered, 15 kV ESD protected,
up to 12 Mbps true RS-485/RS-422 transceiver
Datasheet - production data
Features
• ESD protection
– ±15 kV human body model
– ±8 kV IEC 1000-4-2 contact discharge
• Operates from a single 3.3 V supply - no
charge pump required
• Interoperable with 5 V logic
• 1 µA low current shutdown mode max
• Guaranteed 12 Mbps data rate
• -7 to 12 common mode input voltage range
• Half duplex versions available
• Industry standard 75176 pinout
• Current limiting and thermal shutdown for
driver overload protection
• Guaranteed high receiver output state for
floating, shorted or terminated inputs with no
signal present
• Allows up to 64 transceivers on the bus
Description
The ST1480Ax is ±15 kV ESD protected, 3.3 V
low power transceiver for RS-485 and RS-422
communications. The device contains one driver
and one receiver in half duplex configuration.
The ST1480Ax transmits and receives at a
guaranteed data rate of at least 12 Mbps.
All transmitter outputs and receiver inputs are
protected to ±15 kV using Human Body Model.
Driver is short-circuit current limited and is
protected against excessive power dissipation by
thermal shutdown circuitry that places the driver
outputs into a high-impedance state.
The ST1480Ax input has a true fail-safe feature
that guarantees a logic high output if both inputs
are open circuit, shorted together or in the
presence of a termination with no signal on the
bus.
Table 1. Device summary
Order codes Temperature range Package Packaging
ST1480ACN 0 to 70 °C DIP-8 50 parts per tube / 40 tube per box
ST1480ACDR 0 to 70 °C SO-8 (tape & reel) 2500 parts per reel
ST1480ABDR -40 to 85 °C SO-8 (tape & reel) 2500 parts per reel
www.st.com
