–100

–80

–60

–40

–20

0

20

40

60

–1

–0.5 0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

TA = 25°C, VCC = 3 V,

VIH = 3 V, VIL = 0 V,

All Outputs Switching

VOH – V

VOL – V

–20

0

20

40

60

80

100

–0.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

TA = 25°C, VCC = 3 V,

VIH = 3 V, VIL = 0 V,

All Outputs Switching

SN74LVC2G17

SCES381N – JANUARY 2002 – REVISED JANUARY 2015

www.ti.com

Typical Power Button Circuit (continued)

10.2.3 Application Curves

Figure 6. Output Current Drive

Figure 5. Output Current Drive

vs LOW-level Output Voltage

vs HIGH-level Output Voltage

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 terminal should have a good bypass capacitor to prevent power disturbance. For devices with a single

supply, a 0.1

μF capacitor is recommended. If there are multiple VCC terminals then 0.01 μF or 0.022 μF

capacitors are recommended for each power terminal. It is ok to parallel multiple bypass capacitors to reject

different frequencies of noise. Multiple bypass capacitors may be paralleled to reject different frequencies of

noise. The bypass capacitor should be installed as close to the power terminal as possible for the best results.

12 Layout

12.1 Layout Guidelines

When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of

digital logic devices are unused. Some examples are when only two inputs of a triple-input AND gate are used,

or when only 3 of the 4-buffer gates are used. Such input pins should not be left unconnected because the

undefined voltages at the outside connections result in undefined operational states.

Specified in Figure 7 are 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 should 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.

10

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