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PDF MC74LVX245 Data sheet ( Hoja de datos )
| Número de pieza | MC74LVX245 | |
| Descripción | Octal Bus Transceiver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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MC74LVX245
Octal Bus Transceiver
With 5 V−Tolerant Inputs
The MC74LVX245 is an advanced high speed CMOS octal bus
transceiver.
It is intended for two−way asynchronous communication between
data buses. The direction of data transmission is determined by the
level of the T/R input. The output enable pin (OE) can be used to
disable the device, so that the buses are effectively isolated.
All inputs are equipped with protection circuits against static
discharge.
Features
• High Speed: tPD = 4.7 ns (Typ) at VCC = 3.3 V
• Low Power Dissipation: ICC = 4 mA (Max) at TA = 25°C
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Low Noise: VOLP = 0.8 V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300 mA
• ESD Performance: Human Body Model > 2000 V;
Machine Model > 200 V
• Pb−Free Packages are Available*
www.DataSheet4U.com
Application Notes
• Do not force a signal on an I/O pin when it is an active output,
damage may occur
• All floating (high impedance) input or I/O pins must be fixed by
means of pullup or pulldown resistors or bus terminator ICs
• A parasitic diode is formed between the bus and VCC terminals.
Therefore, the LVX245 cannot be used to interface 5.0 V to 3.0 V
systems directly
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
http://onsemi.com
MARKING
DIAGRAMS
20
1
20
SOIC−20
DW SUFFIX
CASE 751D
1
LVX245
AWLYYWW
20
1
20
TSSOP−20
DT SUFFIX
CASE 948E
1
LVX
245
ALYW
20
1
20
SOEIAJ−20
M SUFFIX
CASE 967
1
74LVX245
AWLYWW
A = Assembly Location
WL, L = Wafer Lot
Y, YY = Year
W, WW = Work Week
1 2 3 4 5 6 7 8 9 10
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
Figure 1. 20−Lead Pinout (Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
March, 2005 − Rev. 3
1
Publication Order Number:
MC74LVX245/D
1 page  
Input
A or B
50%
tPLH
Output
B or A
50% VCC
Figure 3.
MC74LVX245
SWITCHING WAVEFORMS
T/R
VCC
GND
tPHL
OE
A or B
A or B
50% VCC
tPZL
50% VCC
tPZH
50% VCC
tPLZ
tPHZ
Figure 4.
50%
50% VCC
VCC
GND
VCC
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH −0.3V
HIGH
IMPEDANCE
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 kW
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
*Includes all probe and jig capacitance
Figure 5. Propagation Delay Test Circuit
*Includes all probe and jig capacitance
Figure 6. 3−State Test Circuit
http://onsemi.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC74LVX245.PDF ] | |
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