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SN7407D Fiches technique(PDF) 10 Page - Texas Instruments |
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SN7407D Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 25 page Vcc Unused Input Input Output Input Unused Input Output 15 20 25 30 35 40 0.4 0.5 0.6 0.7 V OL(V) C002 10 SN5407, SN5417, SN7407, SN7417 SDLS032H – DECEMBER 1983 – REVISED SEPTEMBER 2016 www.ti.com Product Folder Links: SN5407 SN5417 SN7407 SN7417 Submit Documentation Feedback Copyright © 1983–2016, Texas Instruments Incorporated Typical Application (continued) 9.2.3 Application Curve Figure 5. VOL vs IOL 10 Power Supply Recommendations The power supply can be any voltage between the minimum and maximum supply voltage rating (see Recommended Operating Conditions). Each VCC pin must have a good bypass capacitor to prevent power disturbance. TI recommends 0.1 µF for devices with a single supply. If there are multiple VCC pins, then TI recommends 0.01 µF or 0.022 µF for each power pin. It is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise. A 0.1 µF and a 1 µF are commonly used in parallel. The bypass capacitor must be installed as close to the power pin as possible for best results. 11 Layout 11.1 Layout Guidelines When using multiple bit logic devices inputs must never float. In many cases, functions or parts of functions of digital logic devices are unused, for example, when only two inputs of a triple-input AND gate are used or only 3 of the 4 buffer gates are used. Such input pins must not be left unconnected because the undefined voltages at the outside connections result in undefined operational states. Figure 6 specifies the rules that must be observed under all circumstances. All unused inputs of digital logic devices must be connected to a high or low bias to prevent them from floating. The logic level that must be applied to any particular unused input depends on the function of the device. Generally they are tied to GND or VCC, whichever makes more sense or is more convenient. It is generally acceptable to float outputs, unless the part is a transceiver. 11.2 Layout Example Figure 6. Layout Diagram |
Numéro de pièce similaire - SN7407D |
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Description similaire - SN7407D |
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