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SN74HC125N 데이터시트(PDF) 10 Page - Texas Instruments

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부품명 SN74HC125N
상세설명  Quadruple Bus Buffer Gates
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홈페이지  http://www.ti.com
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1
1OE
2
1A
1Y
3
4
2OE
5
2A
2Y
6
10
3OE
9
3A
3Y
8
13
4OE
12
4A
4Y
11
Pin numbers shown are for the D, DB, J, N, NS, PW, and W packages.
SN54HC125
SN74HC125
SCLS104E – AUGUST 1984 – REVISED DECEMBER 2015
www.ti.com
8 Detailed Description
8.1 Overview
The SNx4HC125 offers 4 independent gate buffers capable of sinking or sourcing 6 mA at 5-V VCC. Each
buffer also integrates a 3-state output, or high impedance output. To enable the device's 3-state output, set
the corresponding OE input to a HIGH logic level.
Major benefits of using HC logic include both the technology's flexibility of input VCC (2 V to 6 V) and high-
speed capability (11 ns typical tpd).
8.2 Functional Block Diagram
8.3 Feature Description
The 3-state outputs enable design choices such as connecting multiple outputs together, as long as the 3-state
controls are used correctly. In a typical example, without 3-state outputs, if two outputs were connected to the
same input on an adjacent system, and each output was trying to drive a different logic level (one HIGH, one
LOW), the device could short-circuit and become damaged. With 3-state output functionality, the outputs can be
configured so that when one output is driving an output signal, the others are set to high impedance and prevent
any damage to the device.
8.4 Device Functional Modes
Table 1 lists the functional modes of the SNx4HC125.
Table 1. Function Table
INPUTS
OUTPUT
Y
OE
A
L
H
H
L
L
L
H
X
Z
10
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Product Folder Links: SN54HC125 SN74HC125


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