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SN74GTLPH306 数据表(PDF) 2 Page - Texas Instruments |
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SN74GTLPH306 数据表(HTML) 2 Page - Texas Instruments |
2 / 17 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) <BR/> SN74GTLPH306 8-BIT LVTTL-TO-GTLP BUS TRANSCEIVER SCES284E – OCTOBER 1999 – REVISED APRIL 2005 This GTLP device features TI-OPC circuitry, which actively limits overshoot caused by improperly terminated backplanes, unevenly distributed cards, or empty slots during low-to-high signal transitions. This improves signal integrity, which allows adequate noise margin to be maintained at higher frequencies. Active bus-hold circuitry holds unused or undriven LVTTL data inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. When VCC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, the output-enable (OE) input 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. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING Tube SN74GTLPH306DW SOIC – DW GTLPH306 Tape and reel SN74GTLPH306DWR –40°C to 85°C TSSOP – PW Tape and reel SN74GTLPH306PWR GH306 TVSOP – DGV Tape and reel SN74GTLPH306DGVR GH306 (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTIONAL DESCRIPTION The SN74GTLPH306 is an 8-bit bus transceiver and is designed for asynchronous communication between data buses. The device transmits data from the A port to the B port or from the B port to the A port, depending on the logic level at the direction-control (DIR) input. OE can be used to disable the device so the buses are effectively isolated. Data polarity is noninverting. For A-to-B data flow, when OE is low and DIR is high, the B outputs take on the logic value of the A inputs. When OE is high, the outputs are in the high-impedance state. The data flow for B to A is similar to A to B, except OE and DIR are low. FUNCTION TABLE INPUTS OUTPUT MODE OE DIR H X Z Isolation L L B data to A port True transparent L H A data to B port 2 |
类似零件编号 - SN74GTLPH306_15 |
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类似说明 - SN74GTLPH306_15 |
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