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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SP333 датащи(PDF) 9 Page - Sipex Corporation |
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SP333 датащи(HTML) 9 Page - Sipex Corporation |
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9 / 13 page  9 TGoddard/SP333/9617R0 SP333 RS-232/AppleTalk Programmable Transceiver © Copyright 2000 Sipex Corporation Shutdown Mode The SP333 can be put into a low power shut- down mode by connecting the Shutdown pin (SD, Pin 26) to a logic HIGH. During Shut- down, the driver outputs are put into a high impedance tri-state, and the charge pump is put into stand-by mode. The supply current drops to less than 10 µA during shutdown and can be activated in either RS-232 or AppleTalk mode. For normal operation, the SD pin should be connected to a logic LOW. Receiver Enable The SP333 has a control line to enable or disable the receiver outputs. Pin 3 (RXEN) is active LOW; a logic LOW on Pin 3 will enable the receiver outputs. A logic HIGH on Pin 3 will disable the receiver outputs. The receiver en- able function can be initiated in either RS-232 or AppleTalk mode. Wake-Up The SP333 also features a "wake-up" function. The wake up function allows the RS-232 receiv- ers to remain active during Shutdown mode unless they are disabled by the Receiver Enable control pin (Pin 3). The wake-up feature allows users to take advantage of the low power Shut- down mode and keep the receivers active to accept an incoming "ring indicator" signal. |
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