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MC74VHCT259AM 数据表(PDF) 1 Page - ON Semiconductor

部件名 MC74VHCT259AM
功能描述  8?묪it Addressable Latch/1?뭥f?? Decoder CMOS Logic Level Shifter with LSTTL?묬ompatible Inputs
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

MC74VHCT259AM 数据表(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2006
January, 2006 − Rev. 4
1
Publication Order Number:
MC74VHCT259A/D
MC74VHCT259A
8−Bit Addressable
Latch/1−of−8 Decoder
CMOS Logic Level Shifter
with LSTTL−Compatible Inputs
The MC74VHCT259 is an 8−bit Addressable Latch fabricated with
silicon gate CMOS technology. It achieves high speed operation
similar to equivalent Bipolar Schottky TTL while maintaining CMOS
low power dissipation.
The internal circuit is composed of three stages, including a buffer
output which provides high noise immunity and stable output.
The VHC259 is designed for general purpose storage applications in
digital systems. The device has four modes of operation as shown in
the mode selection table. In the addressable latch mode, the signal on
Data In is written into the addressed latch. The addressed latch follows
the data input with all non−addressed latches remaining in their
previous states. In the memory mode, all latches remain in their
previous state and are unaffected by the Data or Address inputs. In the
one−of−eight decoding or demultiplexing mode, the addressed output
follows the state of Data In with all other outputs in the LOW state. In
the Reset mode, all outputs are LOW and unaffected by the address
and data inputs. When operating the VHCT259 as an addressable
latch, changing more than one bit of the address could impose a
transient wrong address. Therefore, this should only be done while in
the memory mode.
The VHCT inputs are compatible with TTL levels. This device can
be used as a level converter for interfacing 3.3 V to 5.0 V because it
has full 5.0 V CMOS level output swings.
The VHCT259A input structures provide protection when voltages
between 0 V and 5.5 V are applied, regardless of the supply voltage.
The output structures also provide protection when VCC = 0 V. These
input and output structures help prevent device destruction caused by
supply voltage−input/output voltage mismatch, battery backup, hot
insertion, etc.
Features
High Speed: tPD = 7.6 ns (Typ) at VCC = 5.0 V
Low Power Dissipation: ICC = 2 mA (Max) at TA = 25°C
TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V
Power Down Protection Provided on Inputs and Outputs
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300 mA
ESD Performance: HBM > 2000 V
Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
MARKING
DIAGRAMS
TSSOP−16
DT SUFFIX
CASE 948F
SOIC−16
D SUFFIX
CASE 751B
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
http://onsemi.com
A
= Assembly Location
WL, L
= Wafer Lot
Y
= Year
WW, W
= Work Week
G or
G
= Pb−Free Package
VHCT259AG
AWLYWW
VHCT
259A
ALYW
G
G
(Note: Microdot may be in either location)
1
1
16
1
1
16
1
SOEIAJ−16
M SUFFIX
CASE 966
74VHCT259
ALYWG
1
16


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