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SN74GTLP817DWE4 Datenblatt(PDF) 2 Page - Texas Instruments |
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SN74GTLP817DWE4 Datenblatt(HTML) 2 Page - Texas Instruments |
2 / 19 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) <BR/> SN74GTLP817 GTLP-TO-LVTTL 1-TO-6 FANOUT DRIVER SCES285E – OCTOBER 1999 – REVISED APRIL 2005 This device is fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. This device features adjustable edge-rate control (ERC). Changing the ERC input voltage between GND and VCC adjusts the B-port output rise and fall times. This allows the designer to optimize system data-transfer rate and signal integrity to the backplane load. ERC automatically is selected to the same speed as alternate source 1-to-6 fanout drivers that use pin 18 for 3.3-V or 5-V VCC. 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 SN74GTLP817DW SOIC – DW GTLP817 Tape and reel SN74GTLP817DWR –40°C to 85°C TSSOP – PW Tape and reel SN74GTLP817PWR GT817 TVSOP – DGV Tape and reel SN74GTLP817DGVR GT817 (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTIONAL DESCRIPTION The SN74GTLP817 is a fanout driver providing LVTTL-to-GTLP translation and GTLP-to-LVTTL translation in the same package. The LVTTL-to-GTLP direction is a 1-to-2 fanout driver with a single output enable (OEAB). The GTLP-to-LVTTL direction is a 1-to-6 fanout driver with a single output enable (OEBA). Data polarity is inverting for both directions. 2 |
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