5-516
FAST AND LS TTL DATA
3-STATE HEX BUFFERS
These devices are high speed hex buffers with 3-state outputs. They are
organized as single 6-bit or 2-bit/4-bit, with inverting or non-inverting data (D)
paths. The outputs are designed to drive 15 TTL Unit Loads or 60 Low Power
Schottky loads when the Enable (E) is LOW.
When the Output Enable (E) is HIGH, the outputs are forced to a high
impedance “off” state. If the outputs of the 3-state devices are tied together,
all but one device must be in the high impedance state to avoid high currents
that would exceed the maximum ratings. Designers should ensure that Output
Enable signals to 3-state devices whose outputs are tied together are
designed so there is no overlap.
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 54
74 4.5
4.75 5.0
5.0 5.5
5.25 V
TAOperating Ambient Temperature Range 54
74 55
025
25 125
70 °C
IOH Output Current — High 54
74 1.0
2.6 mA
IOL Output Current — Low 54
74 12
24 mA
SN54/74LS365A
SN54/74LS366A
SN54/74LS367A
SN54/74LS368A
3-STATE HEX BUFFERS
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16 1
16
1
16 1
D SUFFIX
SOIC
CASE 751B-03
5-517
FAST AND LS TTL DATA
SN54/74LS365A SN54/74LS366A
SN54/74LS367A SN54/74LS368A
14 13 12 11 10 9
1234567
16 15
8
VCC
E1
E2
GND
14 13 12 11 10 9
1234567
16 15
8
VCC
E
E
GND
SN54/74LS365A
HEX 3-STATE BUFFER WITH
COMMON 2-INPUT NOR ENABLE
SN54/74LS366A
HEX 3-STATE INVERTER BUFFER
WITH COMMON 2-INPUT NOR ENABLE
SN54/74LS367A
HEX 3-STATE BUFFER
SEPARATE 2-BIT AND 4-BIT SECTIONS
SN54/74LS368A
HEX 3-STATE INVERTER BUFFER
SEPARATE 2-BIT AND 4-BIT SECTIONS
14 13 12 11 10 9
1234567
16 15
8
VCC
E
E
GND
TRUTH TABLE
INPUTS OUTPUT
E1E2D
L
L
H
X
L
L
X
H
L
H
X
X
L
H
(Z)
(Z)
TRUTH TABLE
INPUTS OUTPUT
E1E2D
L
L
H
X
L
L
X
H
L
H
X
X
H
L
(Z)
(Z)
14 13 12 11 10 9
1 2 3 4 5 6 7
16 15
8
VCC
E1
E2
GND
TRUTH TABLE
INPUTS OUTPUT
ED
L
L
H
L
H
X
L
H
(Z)
TRUTH TABLE
INPUTS OUTPUT
ED
L
L
H
L
H
X
H
L
(Z)
5-518
FAST AND LS TTL DATA
SN54/74LS365A SN54/74LS366A
SN54/74LS367A SN54/74LS368A
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
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 0.7
V
Guaranteed Input LOW Voltage for
All Inputs
VIL
Input LOW Voltage
74 0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage 0.65 1.5 V VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54 2.4 3.4 V
V
CC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
74 2.4 3.1 V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74 0.25 0.4 V IOL = 12 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VOL
Output LOW Voltage
74 0.35 0.5 V IOL = 24 mA
VIN = VIL or VIH
per Truth Table
IOZH Output Off Current HIGH 20 µA VCC = MAX, VOUT = 2.7 V
IOZL Output Off Current LOW 20 µA VCC = MAX, VOUT = 0.4 V
IIH
Input HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
IIH
Input HIGH Current
0.1 mA VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
E Inputs 0.4 mA VCC = MAX, VIN = 0.4 V
IIL
D Inputs 20 µAVCC = MAX, VIN = 0.5 V
Either E Input at 2.0 V
0.4 mA VCC = MAX, VIN = 0.4 V
Both E Inputs at 0.4 V
IOS Short Circuit Current (Note 1) 40 225 mA VCC = MAX
I
CC
Power Supply Current
LS365A, 367A 24
mA V
CC = MAX
ICC
LS366A, 368A 21
mA
VCC = MAX
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)
Symbol
Parameter
Limits
Test Conditions
Symbol
Parameter
LS365A/LS367A LS366A/LS368A
Test Conditions
Symbol
Parameter
Min Typ Max Min Typ Max
Test Conditions
tPLH
tPHL Propagation Delay 10
9.0 16
22 7.0
12 15
18 ns
C
L = 45 pF,
RL = 667
tPZH
tPZL Output Enable Time 19
24 35
40 18
28 35
45 ns
CL = 45 pF,
RL = 667
tPHZ
tPLZ Output Disable Time 30
35 32
35 ns CL = 5.0 pF
5-519
FAST AND LS TTL DATA
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5-520
FAST AND LS TTL DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability , including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “T ypicals” must be validated for each customer application by customers technical experts. Motorola does
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against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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