|
|
PDF 74LS85 Data sheet ( Hoja de datos )
| Número de pieza | 74LS85 | |
| Descripción | LOW POWER SCHOTTKY | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de 74LS85 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
SN74LS85
4-Bit Magnitude
Comparator
The SN74LS85 is a 4-Bit Magnitude Camparator which compares
two 4-bit words (A, B), each word having four Parallel Inputs
(A0 – A3, B0 – B3); A3, B3 being the most significant inputs. Operation
is not restricted to binary codes, the device will work with any
monotonic code. Three Outputs are provided: “A greater than B”
(OA > B), “A less than B” (OA < B), “A equal to B” (OA = B). Three
Expander Inputs, IA > B, IA < B, IA = B, allow cascading without external
gates. For proper compare operation, the Expander Inputs to the least
significant position must be connected as follows: IA < B= IA > B = L,
IA = B = H. For serial (ripple) expansion, the OA > B, OA < B and OA = B
Outputs are connected respectively to the IA > B, IA < B, and IA = B
Inputs of the next most significant comparator, as shown in Figure 1.
Refer to Applications section of data sheet for high speed method of
comparing large words.
The Truth Table on the following page describes the operation of the
SN74LS85 under all possible logic conditions. The upper 11 lines
describe the normal operation under all conditions that will occur in a
single device or in a series expansion scheme. The lower five lines
describe the operation under abnormal conditions on the cascading
inputs. These conditions occur when the parallel expansion technique
is used.
• Easily Expandable
• Binary or BCD Comparison
• OA > B, OA < B, and OA = B Outputs Available
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min Typ Max Unit
VCC Supply Voltage
TA Operating Ambient
Temperature Range
4.75 5.0 5.25
V
0 25 70 °C
IOH Output Current – High
IOL Output Current – Low
– 0.4
8.0
mA
mA
http://onsemi.com
LOW
POWER
SCHOTTKY
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
Package
Shipping
SN74LS85N 16 Pin DIP 2000 Units/Box
SN74LS85D
16 Pin
2500/Tape & Reel
© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Publication Order Number:
SN74LS85/D
1 page  
SN74LS85
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Min Typ Max
Unit
Test Conditions
VIH Input HIGH Voltage
2.0
Guaranteed Input HIGH Voltage for
V All Inputs
VIL Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage
VOH Output HIGH Voltage
VOL Output LOW Voltage
– 0.65 – 1.5 V VCC = MIN, IIN = – 18 mA
2.7 3.5
V VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
0.25 0.4
0.35 0.5
V IOL = 4.0 mA
V IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
Input HIGH Current
A < B, A > B
IIH Other Inputs
A < B, A > B
Other Inputs
20 µA VCC = MAX, VIN = 2.7 V
60
0.1
0.3 mA VCC = MAX, VIN = 7.0 V
Input LOW Current
IIL A < B, A > B
Other Inputs
– 0.4 mA VCC = MAX, VIN = 0.4 V
– 1.2
IOS Output Short Circuit Current (Note 1) – 20
–100 mA
ICC Power Supply Current
20 mA
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
VCC = MAX
VCC = MAX
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min Typ Max
tPLH
tPHL
Any A or B to A < B, A > B
24 36
20 30
tPLH
tPHL
Any A or B to A = B
27 45
23 45
tPLH
tPHL
A < B or A = B to A > B
14 22
11 17
tPLH
tPHL
A = B to A = B
13 20
13 26
tPLH
tPHL
A > B or A = B to A < B
14 22
11 17
Unit
ns
ns
ns
ns
ns
Test Conditions
VCC = 5.0 V
CL = 15 pF
AC WAVEFORMS
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 3.
http://onsemi.com
5
Figure 4.
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 74LS85.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74LS83 | 4-Bit Binary Adder with Fast Carry |  Fairchild Semiconductor |
| 74LS83 | 4-BIT BINARY FULL ADDER WITH FAST CARRY |  Motorola Semiconductors |
| 74LS83A | 4-BIT BINARY FULL ADDER | Motorola Semiconductors |
| 74LS848 | 8-INPUT PRIORITY ENCODERS WITH 3-STATE OUTPUTS | Motorola Semiconductors |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |