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PDF MC74HC259A Data sheet ( Hoja de datos )
| Número de pieza | MC74HC259A | |
| Descripción | 8-Bit Addressable Latch 1-of-8 Decoder | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC74HC259A (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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MC74HC259A
8-Bit Addressable Latch
1-of-8 Decoder
High−Performance Silicon−Gate CMOS
The MC74HC259A is identical in pinout to the LS259. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
The HC259A has four modes of operation as shown in the mode
selection table. In the addressable latch mode, the data 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 HC259A 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.
Features
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 mA
• High Noise Immunity Characteristic of CMOS Devices
• NLV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
• These Devices are Pb−Free, Halogen Free and are RoHS Compliant
http://onsemi.com
16
1
MARKING
16 DIAGRAMS
SOIC−16
D SUFFIX
CASE 751B
HC259AG
AWLYWW
1
16
TSSOP−16
HC
16
1
DT SUFFIX
CASE 948F
259A
ALYWG
G
1
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
PIN ASSIGNMENT
A0 1
A1 2
A2 3
Q0 4
Q1 5
Q2 6
Q3 7
GND 8
16 VCC
15 RESET
14 ENABLE
13 DATA IN
12 Q7
11 Q6
10 Q5
9 Q4
MODE SELECTION TABLE
Enable Reset
Mode
L H Addressable Latch
HH
Memory
L L 8−Line Demultiplexer
HL
Reset
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
June, 2012 − Rev. 3
1
Publication Order Number:
MC74HC259A/D
1 page  
MC74HC259A
SWITCHING WAVEFORMS
DATA IN
tr
DATA IN
tPLH
OUTPUT Q
90%
50%
10%
90%
50%
10%
tTLH
Figure 2.
tf
VCC
GND
tPHL
tTHL
ADDRESS
SELECT
OUTPUT Q
50%
50%
tPHL
50%
tPLH
Figure 3.
VCC
GND
VCC
GND
VCC
GND
DATA IN
ENABLE
OUTPUT Q
tw
50%
tPHL
tw
50% 50%
tPLH
VCC
GND
VCC
GND
DATA IN
RESET
OUTPUT Q
Figure 4.
tw
50%
tPHL
50%
Figure 5.
VCC
GND
VCC
GND
DATA IN
OR
ADDRESS
SELECT
50%
ENABLE
th(H)
tsu
50%
Figure 6.
TEST POINT
VCC
GND
th(L)
tsu VCC
DEVICE
UNDER
TEST
OUTPUT
CL*
GND
*Includes all probe and jig capacitance
Figure 7. Test Circuit
http://onsemi.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MC74HC259A.PDF ] | |
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