M54HC298 [STMICROELECTRONICS]
QUAD 2 CHANNEL MULTIPLEXER/REGISTER; QUAD 2通道多路复用器/寄存器
| 型号： | M54HC298 |
| 厂家： | 
ST |
| 描述： | QUAD 2 CHANNEL MULTIPLEXER/REGISTER |
| 文件： | 总11页 (文件大小：250K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC298
M74HC298
QUAD 2 CHANNEL MULTIPLEXER/REGISTER
.
.
.
.
.
.
.
.
HIGH SPEED
fMAX = 73 MHz (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
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
WIDE OPERATING VOLTAGE RANGE
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
VCC (OPR) = 2 V TO 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS298
ORDER CODES :
M54HC298F1R
M74HC298B1R
M74HC298M1R
M74HC298C1R
DESCRIPTION
The M54/74HC298 isa high speed CMOSQUAD2-
CHANNEL MULTIPLEXER/REGISTER fabricated
in silicon gate C2MOS technology.
PIN CONNECTIONS (top view)
It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
These circuits are controlled by the signals WORD
SELECT and CLOCK. When the WORD SELECT
input is taken low Word 1 (A1, B1, C1 and D1) is
presented to the input of the flip-flops, and when
WORDSELECT ishigh Word 2(A2, B2, C2 and D2)
is presented to the inputs of theflip-flops. The select
word is clocked to the output terminals on the nega-
tive edge of the clock pulse. All inputs are equipped
with protection circuits against static discharge and
transient excess voltage.
INPUT AND OUTPUT EQUIVALENT CIRCUIT
NC =
No Internal
Connection
October 1992
1/11
M54/M74HC298
TRUTH TABLE
INPUTS
OUTPUTS
WORD SELECT
CLOCK
QA
a1
QB
b1
QC
c1
QD
d1
L
H
X
a2
b2
c2
d2
QA0
QB0
QC0
QD0
X
: DON’T CARE (INCLUDING TRANSITION)
a1, a2, ETC
: THE LEVEL OF STEAY STATEINPUT AT a1, a2, etc.
QA0, QB0, ETC : THE LEVEL OF QA, QB, ETC ENTERED ON THE MOST RECENT NEGATIVE TRANSITION OF THE CLOCK INPUT.
LOGIC DIAGRAM
2/11
M54/M74HC298
PIN DESCRIPTION
IEC LOGIC SYMBOL
PIN No
SYMBOL
NAME AND FUNCTION
1, 2, 5, 6
A2, B2,
C2, D2
Word 2 Data Inputs
3, 4, 7, 9
A1, B1,
C1, D1
Word 1 Data Inputs
12 to 15
10
QA to QD
Outputs
WORD
Word Select Input
SELECT
11
CLOCK
Clock Input (HIGH to
LOW, Edge-triggered)
8
GND
VCC
Ground (0V)
16
Positive Supply Voltage
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
Unit
Supply Voltage
V
DC Input Voltage
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
V
V
VO
DC Output Voltage
IIK
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
mA
mA
mA
mA
mW
oC
IOK
± 20
IO
± 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
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
Parameter
Value
2 to 6
Unit
V
Supply Voltage
Input Voltage
Output Voltage
0 to VCC
0 to VCC
V
VO
V
Top
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
oC
oC
tr, tf
Input Rise and Fall Time
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
0 to 1000
0 to 500
0 to 400
ns
3/11
M54/M74HC298
DC SPECIFICATIONS
Test Conditions
VCC
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
74HC
54HC
(V)
Min. Typ. Max. Min. 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
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
VIL
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
VOH
High Level
Output Voltage
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
1.9
4.4
VI =
VIH
or
IO=-20 µA
V
V
5.9
5.9
VIL
IO=-4.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-5.2 mA 5.68
5.8
0.0
0.0
0.0
VOL
Low Level Output 2.0
Voltage
0.1
0.1
0.1
0.1
0.1
0.1
0.1
VI =
VIH
or
IO= 20 µA
4.5
6.0
4.5
6.0
0.1
0.1
VIL
IO= 4.0 mA
IO= 5.2 mA
0.17 0.26
0.18 0.26
±0.1
0.33
0.33
±1
0.40
0.40
±1
II
Input Leakage
6.0
VI = VCC or GND
µA
µA
Current
ICC
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
4/11
M54/M74HC298
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
VCC
(V)
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
30
8
75
15
95
19
110
22
ns
ns
7
13
16
19
tPLH
tPHL
Propagation
Delay Time
(CLOCK - Q)
45
15
13
22
67
79
18
6
125
25
155
31
190
38
21
26
32
fMAX
Maximum Clock
Frequency
7
5.6
28
33
4.6
23
25
MHz
ns
35
41
tW(H)
tW(L)
Minimum Pulse
Width
(CLOCK)
75
15
13
50
10
9
95
19
16
65
13
11
95
19
16
30
6
110
22
19
75
15
13
110
22
19
40
8
6
ts
Minimum Set-up
Time
(A, B, C, D)
12
3
ns
2
ts
Minimum Set-up
Time
(W. S.)
30
8
75
15
13
25
5
ns
6
th
Minimum Hold
Time
(A, B, C, D)
ns
4
5
7
th
Minimum Hold
Time
(W. S.)
0
0
0
ns
0
0
0
0
0
0
CIN
Input Capacitance
5
10
10
10
pF
pF
CPD (*) Power Dissipation
Capacitance
39
(*) 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/4 (per bit), and the CPD for
operating current can be obtained by the following equation: CPD = 27 + 12 x n
5/11
M54/M74HC298
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST CIRCUIT
TRANSITION TIME AND VIH, VIL OF INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHINGCHARACTERISTICSTEST.
6/11
M54/M74HC298
Plastic DIP16 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
0.51
0.77
TYP.
MAX.
MIN.
0.020
0.030
MAX.
a1
B
b
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
17.78
0.335
0.100
0.700
e3
F
7.1
5.1
0.280
0.201
I
L
3.3
0.130
Z
1.27
0.050
P001C
7/11
M54/M74HC298
Ceramic DIP16/1 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
20
MIN.
MAX.
0.787
0.276
A
B
7
D
E
3.3
0.130
0.700
0.38
0.015
e3
F
17.78
2.29
0.4
2.79
0.55
1.52
0.31
1.27
10.3
8.05
5.08
0.090
0.016
0.046
0.009
0.020
0.110
0.022
0.060
0.012
0.050
0.406
0.317
0.200
G
H
L
1.17
0.22
0.51
M
N
P
7.8
0.307
Q
P053D
8/11
M54/M74HC298
SO16 (Narrow) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.004
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8° (max.)
P013H
9/11
M54/M74HC298
PLCC20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
MAX.
0.395
0.356
0.180
A
B
D
4.57
d1
d2
E
2.54
0.56
0.100
0.022
7.37
8.38
0.290
0.330
0.004
e
1.27
5.08
0.38
0.050
0.200
0.015
e3
F
G
0.101
M
M1
1.27
1.14
0.050
0.045
P027A
10/11
M54/M74HC298
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
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
11/11
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