BUS TRANSCEIVER. SN54LS245 Datasheet

SN54LS245 TRANSCEIVER. Datasheet pdf. Equivalent

SN54LS245 Datasheet
Recommendation SN54LS245 Datasheet
Part SN54LS245
Description OCTAL BUS TRANSCEIVER
Feature SN54LS245; SN54/74LS245 OCTAL BUS TRANSCEIVER The SN54 / 74LS245 is an Octal Bus Transmitter/Receiver designed .
Manufacture Motorola Inc
Datasheet
Download SN54LS245 Datasheet




Motorola  Inc SN54LS245
OCTAL BUS TRANSCEIVER
The SN54 / 74LS245 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
1 2 3 4 5 6 7 8 9 10
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
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
SN54/74LS245
OCTAL BUS TRANSCEIVER
LOW POWER SCHOTTKY
20
1
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA Operating Ambient Temperature Range
IOH Output Current — High
IOL Output Current — Low
Min Typ Max Unit
54 4.5 5.0 5.5
74 4.75 5.0 5.25
V
54 – 55 25 125 °C
74 0 25 70
54, 74
– 3.0
mA
54 – 12 mA
74 – 15
54 12 mA
74 24
FAST AND LS TTL DATA
5-398



Motorola  Inc SN54LS245
SN54 / 74LS245
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
54
74
0.7 Guaranteed Input LOW Voltage for
0.8 V All Inputs
VT+–VT–
VIK
Hysteresis
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
54, 74
54, 74
54, 74
74
0.2 0.4
– 0.65 – 1.5
2.4 3.4
2.0
0.25 0.4
0.35 0.5
V VCC = MIN
V VCC = MIN, IIN = – 18 mA
V VCC = MIN, IOH = – 3.0 mA
V VCC = MIN, IOH = MAX
V IOL = 12 mA
V IOL = 24 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IOZH
IOZL
IIH
IIL
IOS
ICC
Output Off Current HIGH
Output Off Current LOW
A or B, DR or E
Input HIGH Current DR or E
A or B
Input LOW Current
Output Short Circuit Current (Note 1)
Power Supply Current
Total, Output HIGH
Total, Output LOW
– 40
20
– 200
20
0.1
0.1
– 0.2
– 225
µA VCC = MAX, VOUT = 2.7 V
µA VCC = MAX, VOUT = 0.4 V
µA VCC = MAX, VIN = 2.7 V
mA VCC = MAX, VIN = 7.0 V
mA VCC = MAX, VIN = 5.5 V
mA VCC = MAX, VIN = 0.4 V
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
FAST AND LS TTL DATA
5-399



Motorola  Inc SN54LS245
Case 751D-03 DW Suffix
20-Pin Plastic
SO-20 (WIDE)
-A-
20 11
-B- P
0.25 (0.010) M
BM
1 10 10 PL
G
-T- C SEATING
PLANE
D 20 PL
0.25 (0.010) M T B S
K
AS
R X 45°
MF
J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. 751DĆ01, AND Ć02 OBSOLETE, NEW STANDARD
751DĆ03.
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN MAX
12.65
12.95
7.40
7.60
2.35
2.65
0.35
0.49
0.50
0.90
1.27 BSC
0.25
0.32
0.10
0°
0.25
7°Ă
10.05
10.55
0.25
0.75
INCHES
MIN MAX
0.499
0.510
0.292
0.299
0.093
0.104
0.014
0.019
0.020
0.035
0.050 BSC
0.010
0.012
0.004
0°Ă
0.009
7°Ă
0.395
0.415
0.010
0.029
Case 732-03 J Suffix
20-Pin Ceramic Dual In-Line
20
1
A
F
11
10
B
C
L
H
SEATING
D PLANE
N
GK
J
M
-A-
20 11
B
1 10
C
Case 738-03 N Suffix
20-Pin Plastic
L
-T-
SEATING
PLANE
E
GF
K
N
D 20 PL
0.25 (0.010) M T A M
M
J 20 PL
0.25 (0.010) M T B M
NOTES:
1. LEADS WITHIN 0.25 mm (0.010) DIA., TRUE
POSITION AT SEATING PLANE, AT MAXIMUM
MATERIAL CONDITION.
2. DIM L TO CENTER OF LEADS WHEN FORMED
PARALLEL.
3. DIM A AND B INCLUDES MENISCUS.
DIM
A
B
C
D
F
G
H
J
K
L
M
N
MILLIMETERS
MIN MAX
23.88 25.15
6.60
7.49
3.81
5.08
0.38
0.56
1.40
1.65
2.54 BSC
0.51
1.27
0.20
0.30
3.18
4.06
7.62 BSC
0° 15°
0.25
1.02
INCHES
MIN MAX
0.940
0.990
0.260
0.295
0.150
0.200
0.015
0.022
0.055
0.065
0.100 BSC
0.020
0.050
0.008
0.012
0.125
0.160
0.300 BSC
0° 15°
0.010 0.040
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L" TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B" DOES NOT INCLUDE MOLD
FLASH.
5. 738Ć02 OBSOLETE, NEW STANDARD 738Ć03.
DIM
A
B
C
D
E
F
G
J
K
L
M
N
MILLIMETERS
MIN MAX
25.66 27.17
6.10
6.60
3.81
4.57
0.39
0.55
1.27 BSC
1.27
1.77
2.54 BSC
0.21
0.38
2.80
3.55
7.62 BSC
0° 15°
0.51
1.01
INCHES
MIN MAX
1.010
1.070
0.240
0.260
0.150
0.180
0.015
0.022
0.050 BSC
0.050
0.070
0.100 BSC
0.008
0.015
0.110
0.140
0.300 BSC
0° 15°
0.020 0.040
FAST AND LS TTL DATA
5-400







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