ST1480ABN

ST1480A 3.3V Powered, 15KV ESD protected, Up to 12Mbps true RS-485/RS-422 transceiver General features ■ ESD protection – ±15kV human body model – ±8kV IEC 1000-4-2 contact discharge ■ Operate from a single 3.3V supply - no charge pump required ■ Interoperable with 5V logic ■ 1µA low current shutdown mode max ■ Guaranteed 12Mbps 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 ■ DIP-8 SO-8 The ST1480A transmits and receives at a guaranteed data rate of at least 12Mbps. Allow up to 64 transceivers on the bus Description The ST1480A is ±15kV ESD protected, 3.3V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. All transmitter outputs and receiver inputs are protected to ±15kV 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 ST1480A 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. Order code Part number Temperature range Package Packaging ST1480ACN 0 to 70 °C DIP-8 50parts per tube / 40tube per box ST1480ABN -40 to 85 °C DIP-8 50parts per tube / 40tube 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 May 2006 Rev 2 1/22 www.st.com 22 Contents ST1480A Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Truth tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Test circuits and typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2/22 ST1480A Pin configuration 1 Pin configuration Figure 1. Pin connections Table 1. Pin description Pin n° Symbol Name and function 1 RO Receiver output. If A>B by 200mV, RO will be high; if A