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SN74LVC07AD 数据表(PDF) 13 Page - Texas Instruments

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部件名 SN74LVC07AD
功能描述  Hex Buffer/Driver With Open-Drain Outputs
PDF  30 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

SN74LVC07AD 数据表(HTML) 13 Page - Texas Instruments

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Vcc
Unused Input
Input
Output
Input
Unused Input
Output
VCC - V
0
20
40
60
80
0
200
400
600
800
1000
1200
1400
1600
D003
ICC 1.8 V
ICC 2.5 V
ICC 3.3 V
ICC 5 V
SN74LVC07A
www.ti.com
SCAS595V – OCTOBER 1997 – REVISED MAY 2015
Typical Application (continued)
10.2.3 Application Curves
Figure 8. ICC vs Frequency
11 Power Supply Recommendations
The power supply can be any voltage between the MIN and MAX supply voltage rating located in the
Recommended Operating Conditions table.
Each VCC pin must have a good bypass capacitor to prevent power disturbance. For devices with a single supply,
0.1
μf is recommended; if there are multiple VCC pins, then 0.01 μf or 0.022 μf is recommended for each power
pin. It is acceptable to parallel multiple bypass caps 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.
12 Layout
12.1 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 9 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 will be 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.
12.2 Layout Example
Figure 9. Layout Diagram
Copyright © 1997–2015, Texas Instruments Incorporated
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