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SN74GTL16622ADGGR Datenblatt(PDF) 2 Page - Texas Instruments |
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SN74GTL16622ADGGR Datenblatt(HTML) 2 Page - Texas Instruments |
2 / 11 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) SN74GTL16622A 18-BIT LVTTL-TO-GTL/GTL+ BUS TRANSCEIVER SCBS673F – AUGUST 1996 – REVISED APRIL 2005 For A-to-B data flow, the device operates on the low-to-high transition of CLKAB if CEAB is low. When OEAB is low, the outputs are active. When OEAB is high, the outputs are in the high-impedance state. Data flow for B to A is similar to that of A to B, but uses OEBA, CLKBA, and CEBA. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. Active bus-hold circuitry holds unused or undriven LVTTL inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. 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. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING –40°C to 85°C TSSOP – DGG Tape and reel SN74GTL16622ADGGR GTL16622A (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE(1) INPUTS OUTPUT MODE B CEAB OEAB CLKAB A X H X X Z Isolation H L X X B0(2) Latched storage of A data X L H or L X B0(2) L L ↑ L L Clocked storage of A data L L ↑ H H (1) A-to-B data flow is shown. B-to-A data flow is similar, but uses OEBA, CLKBA, and CEBA. (2) Output level before the indicated steady-state input conditions are established 2 |
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Ähnliche Beschreibung - SN74GTL16622ADGGR |
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