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74LVTH162244DLRG4 데이터시트(PDF) 2 Page - Texas Instruments |
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74LVTH162244DLRG4 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 17 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) SN54LVTH162244 ,, SN74LVTH162244 3.3-V ABT 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS258N – JUNE 1993 – REVISED NOVEMBER 2006 The 'LVTH162244 devices are 16-bit buffers and line drivers designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical active-low output-enable (OE) inputs. The outputs, which are designed to source or sink up to 12 mA, include equivalent 22- Ω series resistors to reduce overshoot and undershoot. Active bus-hold circuitry holds unused or undriven 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 devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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. These devices are 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 devices when they are 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. 2 Submit Documentation Feedback |
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