STMICROELECTRONICS M74HCT138M1R

M54HCT138
M74HCT138
3 TO 8 LINE DECODER (INVERTING)
.
.
.
.
.
.
.
HIGH SPEED
tPD = 16 ns (TYP.) at VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA AT TA = 25 °C
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
BALANCED PROPAGATION DELAYS
tPLH = tPHL
SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL
COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS138
DESCRIPTION
The M54/74HC138 is a high speed CMOS 3 TO 8
LINE DECODER fabricated in silicon gate C 2MOS
technology. It has the same high speed performance of LSTTL combined with true CMOSlow power
consumption. If the device is enabled, 3 binary select inputs (A, B and C) determine which one of the
outputs will go low. If enable input G1 is held low or
either G2A or G2B is held high, the decoding function is inhibited and all the 8 outputs go high. Three
enable inputs are provided to ease cascade connection and application of address decoders for memory systems. All inputs are equipped with protection
circuits against static discharge and tran- sient excess voltage.This integrated circuit has input and
output characteristics that are fully compatible with
54/74 LSTTL logic families. M54/74HCT devices
2
are designed to directly interface HSC MOS systems with TTL and NMOS components. They are
also plug in replacements for LSTTL devices giving
a reduction of power consumption.
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCT138F1R
M74HCT138M1R
M74HCT138B1R
M74HCT138C1R
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
NC =
No Internal
Connection
February 1993
1/10
M54/M74HCT138
TRUTH TABLE
INPUTS
ENABLE
G2B
G2A
X
X
X
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
G1
L
X
X
H
H
H
H
H
H
H
H
C
X
X
X
L
L
L
L
H
H
H
H
SELECT
B
X
X
X
L
L
H
H
L
L
H
H
OUTPUTS
A
X
X
X
L
H
L
H
L
H
L
H
Y0
H
H
H
L
H
H
H
H
H
H
H
Y1
H
H
H
H
L
H
H
H
H
H
H
Y2
H
H
H
H
H
L
H
H
H
H
H
Y3
H
H
H
H
H
H
L
H
H
H
H
Y4
H
H
H
H
H
H
H
L
H
H
H
X: Don’t Care
PIN DESCRIPTION
IEC LOGIC SYMBOL
PIN No
1, 2, 3
SYMBOL
A, B, C
NAME AND FUNCTION
Address Inputs
4, 5
G2A, G2B
Enable Inputs
6
15, 14, 13,
12, 11, 10,
9, 7
8
G1
Y0 to Y7
Enable Input
Outputs
GND
Ground (0V)
16
V CC
Positive Supply Voltage
LOGIC DIAGRAM
2/10
Y5
H
H
H
H
H
H
H
H
L
H
H
Y6
H
H
H
H
H
H
H
H
H
L
H
Y7
H
H
H
H
H
H
H
H
H
H
L
M54/M74HCT138
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
VI
Supply Voltage
DC Input Voltage
-0.5 to +7
-0.5 to VCC + 0.5
V
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
IOK
DC Input Diode Current
DC Output Diode Current
± 20
± 20
mA
mA
IO
DC Output Source Sink Current Per Output Pin
± 25
mA
DC VCC or Ground Current
± 50
mA
500 (*)
mW
ICC or IGND
PD
Power Dissipation
Tstg
TL
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
o
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
Value
4.5 to 5.5
Unit
V
V
VI
Input Voltage
0 to VCC
VO
Output Voltage
0 to VCC
Top
Operating Temperature: M54HC Series
M74HC Series
tr, tf
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
-55 to +125
-40 to +85
0 to 500
V
o
o
C
C
ns
3/10
M54/M74HCT138
DC SPECIFICATIONS
Test Conditions
Symbol
Parameter
VCC
(V)
VIH
High Level Input
Voltage
4.5
to
5.5
V IL
Low Level Input
Voltage
4.5
to
5.5
V OH
High Level
Output Voltage
VOL
II
ICC
∆ICC
4/10
Low Level Output
Voltage
Input Leakage
Current
Quiescent Supply
Current
Additional worst
case supply
current
Value
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
2.0
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min. Max. Min. Max.
2.0
0.8
4.5
VI = IO=-20 µA
VIH
or IO=-4.0 mA
V IL
4.5
VI = IO= 20 µA
VIH
or IO= 4.0 mA
V IL
2.0
0.8
V
0.8
4.4
4.5
4.4
4.4
4.18
4.31
4.13
4.10
Unit
V
V
0.0
0.1
0.1
0.1
0.17
0.26
0.33
0.4
VI = VCC or GND
±0.1
±1
±1
µA
5.5
VI = VCC or GND
4
40
80
µA
5.5
Per Input pin
VI = 0.5V or
V I = 2.4V
Other Inputs at
V CC or GND
2.0
2.9
3.0
mA
5.5
V
M54/M74HCT138
AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns)
Test Conditions
Value
Symbol
Parameter
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
4.5
8
15
19
22
tPLH
tPHL
Propagation
Delay Time
(A, B, C - Y)
4.5
17
30
38
45
tPLH
tPHL
Propagation
Delay Time
(G1 - Y)
4.5
tPLH
tPHL
Propagation
Delay Time
(G2 - Y)
4.5
Unit
ns
ns
16
30
38
45
ns
19
30
38
45
ns
CIN
Input Capacitance
5
CPD (*)
Power Dissipation
Capacitance
52
10
10
10
pF
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME
AS THAT IN CASE OF SWITCHING
CHARACTERISTICSTEST.
5/10
M54/M74HCT138
Plastic DIP16 (0.25) MECHANICAL DATA
mm
DIM.
MIN.
a1
0.51
B
0.77
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
P001C
6/10
M54/M74HCT138
Ceramic DIP16/1 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
20
0.787
B
7
0.276
D
E
3.3
0.130
0.38
e3
0.015
17.78
0.700
F
2.29
2.79
0.090
0.110
G
0.4
0.55
0.016
0.022
H
1.17
1.52
0.046
0.060
L
0.22
0.31
0.009
0.012
M
0.51
1.27
0.020
0.050
N
P
Q
10.3
7.8
8.05
5.08
0.406
0.307
0.317
0.200
P053D
7/10
M54/M74HCT138
SO16 (Narrow) MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.004
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45° (typ.)
D
9.8
E
5.8
10
0.385
6.2
0.228
0.393
0.244
e
1.27
0.050
e3
8.89
0.350
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.62
0.024
8° (max.)
P013H
8/10
M54/M74HCT138
PLCC20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
9.78
10.03
0.385
0.395
B
8.89
9.04
0.350
0.356
D
4.2
4.57
0.165
0.180
d1
2.54
0.100
d2
0.56
0.022
E
7.37
8.38
0.290
0.330
e
1.27
0.050
e3
5.08
0.200
F
0.38
0.015
G
0.101
0.004
M
1.27
0.050
M1
1.14
0.045
P027A
9/10
M54/M74HCT138
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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