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PDF 74F524 Data sheet ( Hoja de datos )
| Número de pieza | 74F524 | |
| Descripción | 8-Bit Registered Comparator | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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April 1988
Revised August 1999
74F524
8-Bit Registered Comparator
General Description
The 74F524 is an 8-bit bidirectional register with parallel
input and output plus serial input and output progressing
from LSB to MSB. All data inputs, serial and parallel, are
loaded by the rising edge of the input clock. The device
functions are controlled by two control lines (S0, S1) to exe-
cute shift, load, hold and read out.
An 8-bit comparator examines the data stored in the regis-
ters and on the data bus. Three true-HIGH, open-collector
outputs representing “register equal to bus”, “register
greater than bus” and “register less than bus” are provided.
These outputs can be disabled to the OFF state by the use
of Status Enable (SE). A mode control has also been pro-
vided to allow twos complement as well as magnitude com-
pare. Linking inputs are provided for expansion to longer
words.
Features
s 8-Bit bidirectional register with bus-oriented input-output
s Independent serial input-output to register
s Register bus comparator with “equal to”, “greater than”
and “less than” outputs
s Cascadable in groups of eight bits
s Open-collector comparator outputs for AND-wired
expansion
s Twos complement or magnitude compare
Ordering Code:
Order Number Package Number
Package Description
74F524SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F524PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation DS009546
www.fairchildsemi.com
1 page  
Absolute Maximum Ratings(Note 2)
Storage Temperature
−65°C to +150°C
Ambient Temperature under Bias
−55°C to +125°C
Junction Temperature under Bias
−55°C to +150C
VCC Pin Potential to Ground Pin
Input Voltage (Note 3)
−0.5V to +7.0V
−0.5V to +7.0V
Input Current (Note 3)
−30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
3-STATE Output
−0.5V to VCC
−0.5V to +5.5V
Current Applied to Output
in LOW State (Max)
twice the rated IOL (mA)
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
Note 2: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 3: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
Parameter
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
ICEX
VID
IOD
IIL
IIH + IOZH
IIL + IOZL
IOS
IOHC
ICCH
ICCL
ICCZ
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW
Voltage
Input HIGH Current
10% VCC
10% VCC
5% VCC
5% VCC
10% VCC
10% VCC
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Open Collector, Output
OFF Leakage Test
Power Supply Current
Power Supply Current
Power Supply Current
Min
Typ
Max
Units
VCC
Conditions
2.0 V Recognized as a HIGH Signal
0.8 V
Recognized as a LOW Signal
−1.2
V
Min IIN = −18 mA
2.5 IOH = −1 mA
2.4 V Min IOH = −3 mA
2.7 IOH = −1 mA
2.7 IOH = −3 mA
0.5 V Min IOL = 20 mA (I/On)
0.5 IOL = 24 mA (LT, GT, EQ, C/SO)
5.0 µA Max VIN = 2.7V
7.0 µA Max VIN = 7.0V
50
µA
Max
VOUT = VCC (I/On, C/SO)
4.75
−60
V 0.0 IID = 1.9 µA
All Other Pins Grounded
3.75
µA
0.0 VIOD = 150 mV
All Other Pins Grounded
−0.6 mA Max VIN = 0.5V
70 µA Max VI/O = 2.7V
−650 µA Max VI/O = 0.5V
−150 mA Max VOUT = 0V
250 µA Min VOUT = VCC
128 180 mA Max VO = HIGH
128 180 mA Max VO = LOW
128 180 mA Max VO = HIGH Z
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74F524.PDF ] | |
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