SN74LS245 Transceivers Datasheet

SN74LS245 Datasheet, PDF, Equivalent


Part Number

SN74LS245

Description

Octal Bus Transceivers

Manufacture

ON Semiconductor

Total Page 4 Pages
Datasheet
Download SN74LS245 Datasheet


SN74LS245
SN74LS245
Octal Bus Transceiver
The SN74LS245 is an Octal Bus Transmitter/Receiver designed for
8-line asynchronous 2-way data communication between data buses.
Direction Input (DR) controls transmission of Data from bus A to bus
B or bus B to bus A depending upon its logic level. The Enable input
(E) can be used to isolate the buses.
Hysteresis Inputs to Improve Noise Immunity
2-Way Asynchronous Data Bus Communication
Input Diodes Limit High-Speed Termination Effects
ESD > 3500 Volts
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW)
VCC E B1 B2 B3 B4 B5 B6 B7 B8
20 19 18 17 16 15 14 13 12 11
http://onsemi.com
LOW
POWER
SCHOTTKY
1 2 3 4 5 6 7 8 9 10
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
20
1
PLASTIC
N SUFFIX
CASE 738
TRUTH TABLE
INPUTS
E DIR
OUTPUT
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X Isolation
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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
– 3.0
– 15
mA
mA
IOL Output Current – Low
24 mA
20
1
SOIC
DW SUFFIX
CASE 751D
ORDERING INFORMATION
Device
Package
Shipping
SN74LS245N 16 Pin DIP 1440 Units/Box
SN74LS245DW 16 Pin
2500/Tape & Reel
© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Publication Order Number:
SN74LS245/D

SN74LS245
SN74LS245
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VT+–VT–
VIK
VOH
Hysteresis
Input Clamp Diode Voltage
Output HIGH Voltage
VOL
IOZH
IOZL
IIH
IIL
IOS
ICC
Output LOW Voltage
Output Off Current HIGH
Output Off Current LOW
Input HIGH Current
A or B, DR or
E
DR or E
A or B
Input LOW Current
Output Short Circuit Current (Note 1)
Power Supply Current
Total, Output HIGH
Total, Output LOW
0.2 0.4
V VCC = MIN
– 0.65 – 1.5 V VCC = MIN, IIN = – 18 mA
2.4 3.4
V VCC = MIN, IOH = – 3.0 mA
2.0 V VCC = MIN, IOH = MAX
0.25 0.4
0.35 0.5
V IOL = 12 mA VCC = VCC MIN,
VIN = VIL or VIH
V IOL = 24 mA per Truth Table
20 µA VCC = MAX, VOUT = 2.7 V
– 200 µA VCC = MAX, VOUT = 0.4 V
20 µA VCC = MAX, VIN = 2.7 V
0.1 mA VCC = MAX, VIN = 7.0 V
0.1 mA VCC = MAX, VIN = 5.5 V
– 0.2 mA VCC = MAX, VIN = 0.4 V
– 40 – 225 mA VCC = MAX
70
90 mA VCC = MAX
Total at HIGH Z
95
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, TRISE / TFALL 6.0 ns)
Limits
Symbol
Parameter
Min Typ Max
tPLH
tPHL
Propagation Delay, Data to Output
8.0 12
8.0 12
tPZH Output Enable Time to HIGH Level
25 40
tPZL Output Enable Time to LOW Level
27 40
tPLZ Output Disable Time from LOW Level
15 25
tPHZ Output Disable Time from HIGH Level
15 25
Unit
ns
ns
ns
ns
ns
Test Conditions
CL = 45 pF,
RL = 667
CL = 5.0 pF,
RL = 667
http://onsemi.com
2


Features SN74LS245 Octal Bus Transceiver The SN74 LS245 is an Octal Bus Transmitter/Recei ver designed for 8-line asynchronous 2- way data communication between data bus es. Direction Input (DR) controls trans mission of Data from bus A to bus B or bus B to bus A depending upon its logic level. The Enable input (E) can be use d to isolate the buses. http://onsemi.c om • • • • Hysteresis Inputs to Improve Noise Immunity 2-Way Asynchr onous Data Bus Communication Input Diod es Limit High-Speed Termination Effects ESD > 3500 Volts LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) VCC 20 E 19 B1 18 B2 17 B3 16 B4 15 B5 14 B6 13 B7 12 B8 11 LOW POWER SCHOTTKY 20 1 1 DIR 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 A8 10 GND PLASTIC N SUFFIX CASE 738 TRUTH TABLE INPUTS OUTPUT E L L H DIR L H X Bus B Data to Bus A Bus A Da ta to Bus B Isolation 20 1 H = HIGH Vo ltage Level L = LOW Voltage Level X = I mmaterial SOIC DW SUFFIX CASE 751D GU ARANTEED OPERATING RANGES Symbol VCC TA IOH Parameter Supply Voltage Op.
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