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TL16C552AMHV bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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TL16C552AMHV bảng dữ liệu(HTML) 6 Page - Texas Instruments |
6 / 39 page TL16C552A, TL16C552AM DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT WITH FIFO SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions (Continued) TERMINAL NAME NO. I/O DESCRIPTION NAME FN PN SOUT0, SOUT1 26, 10 39, 23 O Serial data outputs. SOUT0 and SOUT1 are the serial data outputs from the ACE transmitter circuitry. A mark is a high state and a space is a low state. Each SOUT is held in the mark condition when the transmitter is disabled (RESET is asserted low), the transmitter register is empty, or when in the loop mode. STB 55 74 I/O Line printer strobe. STB provides communication between the TL16C552A and the printer. When STB is active (low), it provides the printer with a signal to latch the data currently on the parallel port. STB has an internal pullup resistor to VDD of approximately 10 kΩ. TRI 2 12 I 3-state output control input. TRI controls the 3-state control of all I/O and output terminals. When TRI is asserted, all I/Os and outputs are in the high-impedance state, allowing board level testers to drive the outputs without overdriving internal buffers. TRI is level sensitive and is pulled down with an internal resistor that is approximately 5 k Ω. TXRDY0 TXRDY1 22, 42 35, 58 O Transmitter ready. Two types of DMA signaling are available. Either can be selected using FCR3 when operating in FIFO mode. Only DMA mode 0 is allowed when in TL16C450 mode. Single-transfer DMA (a transfer is made between CPU bus cycles) is supported by mode 0. Multiple transfers that are made continuously until the transmitter FIFO has been filled are supported by mode 1. Mode 0. In FIFO mode (FCR0 = 1, FCR3 = 0) or in TL16C450 mode (FCR0 = 0) when there are no characters in the transmitter holding register or transmitter FIFO, TXRDYx is active (low). Once TXRDYx is activated (low), it goes inactive after the first character is loaded into the holding register of the transmitter FIFO. Mode 1. TXRDY goes active (low) in FIFO mode (FCR0 = 1) when FCR3 = 1 and there are no characters in the transmitter FIFO. When the transmitter FIFO is completely full, TXRDY goes inactive (high). VDD 23, 40, 64 6, 36, 56 Power supply. The VDD requirement is 5 V ± 5%. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VDD (see Note 1) – 0.5 V to VDD + 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, VI – 0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO – 0.5 V to VDD + 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation See Dissipation Rating Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA:: I suffix – 40 °C to 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M suffix – 55 °C to 125°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. DISSIPATION RATING TABLE‡ PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR§ ABOVE TA = 25°C TA = 70°C POWER RATING TA = 125°C POWER RATING FN 1730 mW 19.2 mW/ °C 865 mW – HV 1689 mW 13.5 mW/ °C 1081 mW 337 mW ‡ Power ratings assume a maximum junction temperature (TJ) of 115°C for ’I’ and 150°C for ’M’ suffix devices. § Derating factor is the inverse of the junction-to-ambient thermal resistance, RθJA. |
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