M74HC154 [STMICROELECTRONICS]
4 TO 16 LINE DECODER/DEMULTIPLEXER; 4至16线译码器/解复用器
| 型号： | M74HC154 |
| 厂家： | 
ST |
| 描述： | 4 TO 16 LINE DECODER/DEMULTIPLEXER |
| 文件： | 总8页 (文件大小：173K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M74HC154
4 TO 16 LINE DECODER/DEMULTIPLEXER
.
.
.
HIGH SPEED
tPD = 15 ns (TYP.) at VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 °C
HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
WIDE OPERATING VOLTAGE RANGE
.
.
.
.
.
.
B1R
M1R
(Plastic Package)
(Micro Package)
VCC (OPR) = 2 V to 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS154
ORDER CODES :
M74HC154B1R
M74HC154M1R
PIN CONNECTIONS (top view)
DESCRIPTION
The 74HC154 is a high speed CMOS 4 TO 16-LINE
DECODER/DEMULTIPLEXER fabricated in silicon
gate C2MOS technology. It has the same high speed
performance ofLSTTL combined with true CMOSlow
power consumption.
A binary code applied to the four inputs (A to D) pro-
vides alow level at the selected one ofsixteenoutputs
excluding the other fifteen outputs, when both the
strobe inputs, G1 and G2, are held low. When either
strobe input is held high, the decording function is in-
hibited to keep all outputs high. The strobe function
makes it easy to expand the decoding lines through
cascading, and simplifies the design of address de-
coding circuits in memory control systems.
NC =
Allinputs are equipped with protection circuits against
static discharge and transient excess voltage.
No Internal
Connection
October 1993
1/8
M74HC154
TRUTH TABLE
INPUTS
SELECTED
OUTPUT (L)
G1
G2
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
X
D
L
C
L
B
L
A
L
L
Y0
Y1
L
L
L
L
H
L
L
L
L
H
H
L
Y2
L
L
L
H
L
Y3
L
L
H
H
H
H
L
Y4
L
L
L
H
L
Y5
L
L
H
H
L
Y6
L
L
H
L
Y7
L
H
H
H
H
H
H
H
H
X
X
Y8
L
L
L
H
L
Y9
L
L
H
H
L
Y10
Y11
Y12
Y13
Y14
Y15
NONE
NONE
L
L
H
L
L
H
H
H
H
X
X
L
L
H
L
L
H
H
X
X
L
H
X
X
X
H
X: Don’t Care
LOGIC DIAGRAM
2/8
M74HC154
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCTION
1, 2, 3, 4, 5,
6, 7, 8, 9, 10,
11, 13, 14,
15, 16, 17
Y0 to Y15 Outputs (Active LOW)
18, 19
G1, G2
Enable Inputs (Active
LOW)
23, 22, 21, 20
A to D
GND
VCC
Address Inputs
12
24
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOLS
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
Unit
V
Supply Voltage
DC Input Voltage
DC Output Voltage
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
V
VO
V
IIK
DC Input Diode Current
mA
mA
mA
mA
mW
oC
IOK
DC Output Diode Current
± 20
IO
DC Output Source Sink Current Per Output Pin
± 25
ICC or IGND DC VCC or Ground Current
± 50
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
oC
Absolute MaximumRatingsare those values beyond whichdamage tothe 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
3/8
M74HC154
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
Parameter
Value
2 to 6
Unit
V
Supply Voltage
Input Voltage
0 to VCC
0 to VCC
-40 to +85
0 to 1000
0 to 500
0 to 400
V
VO
Output Voltage
V
oC
Top
Operating Temperature:
tr, tf
Input Rise and Fall Time
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
ns
DC SPECIFICATIONS
Test Conditions
VCC
(V)
Value
TA = 25 oC
-40 to 85 oC
Symbol
Parameter
Unit
V
Min. Typ. Max. Min. Max.
VIH
High Level Input Voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
VIL
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
V
VOH
High Level Output Voltage
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
VI =
VIH
or
IO=-20 µA
V
V
5.9
VIL
IO=-4.0 mA 4.18 4.31
4.13
5.63
IO=-5.2 mA 5.68
5.8
0.0
0.0
0.0
VOL
Low Level Output Voltage
0.1
0.1
0.1
0.1
0.1
0.1
0.33
0.33
±1
VI =
VIH
or
IO= 20 µA
VIL
IO= 4.0 mA
IO= 5.2 mA
0.17 0.26
0.18 0.26
±0.1
II
Input Leakage Current
6.0 VI = VCC or GND
6.0 VI = VCC or GND
µA
µA
ICC
Quiescent Supply Current
4
40
4/8
M74HC154
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
VCC
(V)
Value
TA = 25 oC
Min. Typ. Max. Min. Max.
-40 to 85 oC
Symbol
Parameter
Unit
tTLH
tTHL
Output Transition Time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
30
8
75
15
95
19
ns
ns
ns
7
13
16
tPLH
tPHL
Propagation Delay Time
(A, B, C, D - Y)
65
19
16
55
17
15
5
175
35
220
44
30
37
tPLH
tPHL
Propagation Delay Time
(G1, G2 - Y)
160
32
200
40
27
34
CIN
Input Capacitance
10
10
pF
pF
CPD (*) Power Dissipation Capacitance
57
(*) CPD isdefined 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 followingequation. ICC(opr) = CPD • VCC • fIN + ICC
SWITCHING CHARACTERISTICS TEST
CIRCUIT
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICSTEST.
5/8
M74HC154
Plastic DIP24 (0.25) MECHANICAL DATA
mm
inch
TYP.
0.025
0.018
DIM.
MIN.
0.23
15.2
TYP.
0.63
0.45
MAX.
MIN.
0.009
0.598
MAX.
a1
b
b1
b2
D
E
0.31
0.012
1.27
0.050
32.2
1.268
0.657
16.68
e
2.54
0.100
1.100
e3
F
27.94
14.1
0.555
I
4.445
3.3
0.175
0.130
L
P043A
6/8
M74HC154
SO24 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
2.65
0.20
2.45
0.49
0.32
MIN.
MAX.
0.104
0.007
0.096
0.019
0.012
A
a1
a2
b
0.10
0.004
0.35
0.23
0.013
0.009
b1
C
0.50
0.020
c1
D
45° (typ.)
15.20
10.00
15.60
10.65
0.598
0.393
0.614
0.420
E
e
1.27
0.05
0.55
e3
F
13.97
7.40
0.50
7.60
1.27
0.291
0.19
0.299
0.050
L
S
8° (max.)
L
c1
b
e
s
e3
E
D
24
13
1
12
7/8
M74HC154
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. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin 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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8/8
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