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기능 Quad TRI-STATE Buffers
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54125FMQB 데이터시트, 핀배열, 회로
June 1989
54125 DM54125 DM74125
Quad TRI-STATE Buffers
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function The outputs have
the TRI-STATE feature When enabled the outputs exhibit
the low impedance characteristics of a standard TTL output
with additional drive capability at the high Logic level to per-
mit the driving of bus lines without external pull-up resistors
When disabled both the output transistors are turned off
presenting a high-impedance state to the bus line Thus the
output will act neither as a significant load nor as a driver
To minimize the possibility that two outputs will attempt to
take a common bus to opposite logic levels the disable time
is shorter than the enable time of the outputs
Features
Y Alternate Military Aerospace device (54125) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6540 – 1
Order Number 54125DMQB 54125FMQB DM54125J DM54125W or DM74125N
See NS Package Number J14A N14A or W14B
Function Table
YeA
Inputs
Output
AC
Y
LL
HL
XH
L
H
Hi-Z
H e High Logic Level
L e Low Logic Level
X e Either Low or High Logic Level
Hi-Z e TRI-STATE (Outputs are disabled)
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 6540
RRD-B30M105 Printed in U S A




54125FMQB pdf, 반도체, 판매, 대치품
Physical Dimensions inches (millimeters) (Continued)
14-Lead Molded Dual-In-Line Package (N)
Order Number DM74125N
NS Package Number N14A
14-Lead Ceramic Flat Package (W)
Order Number 54125FMQB or DM54125W
NS Package Number W14B
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
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54125FMQB

Quad TRI-STATE Buffers

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