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74LVC16T245DLRG4 데이터시트(PDF) 2 Page - Texas Instruments |
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74LVC16T245DLRG4 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 16 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) GQL OR ZQL PACKAGE (TOP VIEW) J H G F E D C B A 2 1 3 4 6 5 K SN74LVC16T245 16-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS SCES636A – AUGUST 2005 – REVISED AUGUST 2005 The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. TERMINAL ASSIGNMENTS(1) 1 2 3 4 5 6 A 1DIR NC NC NC NC 1OE B 1B2 1B1 GND GND 1A1 1A2 C 1B4 1B3 VCCB VCCA 1A3 1A4 D 1B6 1B5 GND GND 1A5 1A6 E 1B8 1B7 1A7 1A8 F 2B1 2B2 2A2 2A1 G 2B3 2B4 GND GND 2A4 2A3 H 2B5 2B6 VCCB VCCA 2A6 2A5 J 2B7 2B8 GND GND 2A8 2A7 K 2DIR NC NC NC NC 2OE (1) NC – No internal connection FUNCTION TABLE(1) (EACH 16-BIT SECTION) CONTROL INPUTS OUTPUT CIRCUITS OPERATION OE DIR A PORT B PORT L L Enabled Hi-Z B data to A bus L H Hi-Z Enabled A data to B bus H X Hi-Z Hi-Z Isolation (1) Input circuits of the data I/Os always are active. 2 |
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