Package

We able Flank Lead

PCB

Pad

Standard Lead

Package

Solder

Figure 7-1. Simplified Cutaway View of Wettable-Flank QFN Package and Standard QFN Package After

Soldering

Wettable flanks help improve side wetting after soldering, which makes QFN packages easier to inspect with

automatic optical inspection (AOI). As shown in Figure 7-1, a wettable flank can be dimpled or step-cut to

provide additional surface area for solder adhesion which assists in reliably creating a side fillet. See the

mechanical drawing for additional details.

7.3.4 Clamp Diode Structure

As shown in Figure 7-2, the inputs and outputs to this device have both positive and negative clamping diodes.

CAUTION

Voltages beyond the values specified in the Absolute Maximum Ratings table can cause damage

to the device. The input and output voltage ratings may be exceeded if the input and output clamp-

current ratings are observed.

GND

Logic

Input

Output

VCC

Device

-IIK

+IIK

+IOK

-IOK

Figure 7-2. Electrical Placement of Clamping Diodes for Each Input and Output

7.4 Device Functional Modes

Table 7-1. Function Table (Each Gate)

INPUTS

OUTPUT

A

B

C

Y

H

H

H

H

L

X

X

L

X

L

X

L

X

X

L

L

SN74ACT11-Q1

SCASE76 – FEBRUARY 2025

www.ti.com

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