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TL16C554AIPNR データシート(PDF) 7 Page - Texas Instruments |
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TL16C554AIPNR データシート(HTML) 7 Page - Texas Instruments |
7 / 46 page TL16C554A, TL16C554AI ASYNCHRONOUS-COMMUNICATIONS ELEMENT SLLS509E − AUGUST 2001 − REVISED JUNE 2010 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions (Continued) TERMINAL NAME FN NO. PM NO. PN NO. I/O DESCRIPTION RIA, RIB, RIC, RID 19, 30, 50, 63 18, 43, 58, 3 I Ring detect indicator. A low on RIx indicates the modem has received a ring signal from the telephone line. The condition of this signal can be checked by reading bit 6 of the modem-status register. RTSA, RTSB, RTSC, RTSD 5, 13, 36, 44 26, 35, 66, 75 O Request to send. When active, RTS informs the modem or data set that the ACE is ready to receive data. RTS is set to the active level by setting the RTS modem-control register bit, and is set to the inactive (high) level either as a result of a master reset, or during loop-mode operations, or by clearing bit 1 (RTS) of the MCR. In the auto-RTS mode, RTS is set to the inactive level by the receiver threshold-control logic. RXA, RXB RXC, RXD 7, 29, 41, 63 20, 29, 51, 62 17, 44, 57, 4 I Serial input. RXx is a serial-data input from a connected communications device. During loopback mode, the RXx input is disabled from external connection and connected to the TXx output internally. RXRDY 38 54 O Receive ready. RXRDY goes low when the receive FIFO is full. It can be used as a single transfer or multitransfer. TXA, TXB TXC, TXD 17, 19, 51, 53 8, 10, 39, 41 29, 32, 69, 72 O Transmit outputs. TXx is a composite serial-data output connected to a communications device. TXA, TXB, TXC, and TXD are set to the marking (high) state as a result of reset. TXRDY 39 55 O Transmit ready. TXRDY goes low when the transmit FIFO is full. It can be used as a single transfer or multitransfer function. VCC 13, 30, 47, 64 21, 35, 52 5, 25, 45, 65 Power supply XTAL1 35 25 50 I Crystal input 1 or external clock input. A crystal can be connected to XTAL1 and XTAL2 to utilize the internal oscillator circuit. An external clock can be connected to drive the internal-clock circuits. XTAL2 36 26 51 O Crystal output 2 or buffered clock output (see XTAL1). absolute maximum ratings over free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) −0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range at any input, VI −0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO −0.5 V to VCC + 3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total-power dissipation at (or below) 70 °C 500 mW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: TL16C554A 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TL16C554AI −40 °C to 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg −65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage levels are with respect to GND. |
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同様の説明 - TL16C554AIPNR |
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