STR485E中文资料3.3V RS485，兼容1.8V I/O，可选择速度20Mbps或250kbps数据手册ST规格书

描述 Description

The STR485E is a low power differential line transceiver for data transmission standard RS485 applications in half-duplex mode. Data and enable signals are compatible with 1.8 V or 3.3 V supplies.

Two speeds are selectable through SLR pin: fast data rate up to 20 Mbps or slow data rate for extended cable running to 250 kbps.

Excessive power dissipation caused by bus contention or faults is prevented by thermal shutdown circuit that forces the driver outputs into a high impedance state. The receiver has a fail-safe feature, which guarantees a high output state when the inputs are left open, shorted or idle.

特性 Features

• Half-duplex RS485 transceiver
• 1.65 V to 3.6 V supply for data and enable signals
• 3 V to 3.6 V supply for bus supply
• High speed: up to 20 Mbps data rate
• Low speed selected by SLR pin : 250 kbps
• Up to 128 transceivers on the bus @ 125 °C
• Fail safe receiver (bus open, idle and shorted)
• Thermal shutdown protection
• Low quiescent current in shutdown mode
• Extended temperature range : -40 °C to +125 °C
• Available in industry standard DFN10
• Bus-pin protection more than:
•±4 kV HBM protection
•±8 kV IEC61000-4-2 contact discharge
•±16 kV IEC61000-4-2 air discharge
•Compliant IEC61000-4-4 fast transient burst Class B

简介

STR485E属于集成电路（IC）的驱动器接收器收发器。由制造生产的STR485E驱动器，接收器，收发器该系列产品的主要功能是提供必需的硬件资源，以通过延长电缆或印制线进行通信。确切的功能会因所采用的通信协议而异，可能包括诸如瞬态抑制之类的功能，这些功能对于通信用途可能并非绝对必要，但对于可能的使用环境却是明智之选。