M74HC242F1R [STMICROELECTRONICS]
QUAD BUS TRANSCEIVER 3-STATE; 四路总线收发器3 -STATE
| 型号： | M74HC242F1R |
| 厂家： | 
ST |
| 描述： | QUAD BUS TRANSCEIVER 3-STATE |
| 文件： | 总11页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54/74HC242
M54/74HC243
QUAD BUS TRANSCEIVER (3-STATE)
.
.
.
.
.
.
.
.
HIGH SPEED
tPD = 9 ns (TYP.) AT VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT 25 °C
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
BALANCED PROPAGATION DELAYS
tPLH = tPHL
SYMMETRICAL OUTPUT IMPEDANCE
B1R
(Plastic Package)
F1R
(Ceramic Package)
I
OL = IOH = 6 mA (MIN.)
HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS242/243
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R
M74HCXXXB1R
M74HCXXXM1R
M74HCXXXC1R
DESCRIPTION
The M54/74HC242/243 are high speed CMOS
QUAD
BUS
TRANSCEIVER
(3-STATE)
FABRICATED IN SILICON GATE C2MOS
technology. They have the same high speed
performance of LSTTL combined with true CMOS
low power consumption. The HC242/243 are 3
STATE bi-directional inverting and non-inverting
buffers and are intended for two-way asynchronous
communication between data buses. They are high
drive current outputs which enable high speed
operation when driving large bus capacitances.
Each device has one active high enable (GBA), and
one active low enable (GAB). GBA enables the A
outputs and GAB enables the B outputs. All inputs
are equipped with protection circuits against static
discharge and transient excess voltage.
PIN CONNECTIONS (top view)
HC242
HC243
INPUT AND OUTPUT EQUIVALENT CIRCUIT
NC =
No Internal
Connection
October 1993
1/11
M54/M74HC242/243
CHIP CARRIER
TRUTH TABLE
PIN DESCRIPTION
INPUTS
FUNCTION
OUTPUTS
PIN No
SYMBOL
NAME AND FUNCTION
GAB
GBA
A BUS B BUS HC242 HC243
1
GAB
Output Enable Input
(active LOW)
H
L
H
L
OUTPUT INPUT
A = B A = B
2, 12
NC
1A to 4A
1B to 4B
GBA
Not connected
INPUT OUTPUT B = A B = A
3, 4, 5, 6
Data Inputs/Outputs
Data Inputs/Outputs
Output Enable Input
Ground (0V)
H
L
L
HIGH IMPEDANCE
HIGH IMPEDANCE
Z
Z
Z
Z
11, 10, 9, 8
H
13
7
GND
14
VCC
Positive Supply Voltage
IEC LOGIC SYMBOLS
HC242
HC243
2/11
M54/M74HC242/243
CIRCUIT DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
DC Input Voltage
V
VO
DC Output Voltage
V
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
± 35
ICC or IGND DC VCC or Ground Current
± 70
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
3/11
M54/M74HC242/243
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
DC SPECIFICATIONS
Test Conditions
VCC
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
(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=-6.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-7.8 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= 6.0 mA
IO= 7.8 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
µA
Current
IOZ
ICC
3 State Output
6.0
VI = VIH or VIL
VO = VCC or GND
±0.5
±5
±10
Off-state Current
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
4/11
M54/M74HC242/243
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 6 ns)
Test Conditions
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
Min. Typ. Max. Min. Max. Min. Max.
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
VCC CL
(V) (pF)
tTLH
tTHL
Output Transition
Time
2.0
25
7
60
12
75
15
90
18
50
ns
ns
ns
ns
ns
ns
4.5
6.0
2.0
6
10
13
15
tPLH
tPHL
Propagation
Delay Time
39
13
11
51
17
14
57
18
15
70
22
19
45
20
17
5
90
115
23
135
27
50
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
18
15
20
23
145
29
180
36
220
44
150
25
31
37
tPZL
tPZH
3 State Output
Enable Time
145
29
180
36
220
44
50 RL = 1 KΩ
150 RL = 1 KΩ
50 RL = 1 KΩ
25
31
37
175
35
220
44
265
53
30
37
45
tPLZ
tPHZ
3 State Output
Disable Time
150
30
190
38
225
45
26
32
38
CIN
Input Capacitance
10
10
10
pF
pF
CPD (*) Power Dissipation
Capacitance
for HC242
for HC243
30
35
(*) 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 WAVEFORM
5/11
M54/M74HC242/243
TEST CIRCUIT ICC (Opr.)
CCP CALCULATION
CPD is to be calculated with the following formula
by using the measured value of ICC (Opr.) in the
test circuit opposite
I
CC (Opr.)
CPD
=
fIN x VCC
In determining the typical value of CPD, a
relatively high frequency of 1MHz was applied to
fIN, in order to eliminate any error caused by the
quiescent supply current.
6/11
M54/M74HC242/243
Plastic DIP14 MECHANICAL DATA
mm
inch
DIM.
MIN.
0.51
1.39
TYP.
MAX.
MIN.
0.020
0.055
TYP.
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
15.24
0.335
0.100
0.600
e3
F
7.1
5.1
0.280
0.201
I
L
3.3
0.130
Z
1.27
2.54
0.050
0.100
P001A
7/11
M54/M74HC242/243
Ceramic DIP14/1 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
20
MIN.
MAX.
0.787
0.276
A
B
D
7.0
3.3
0.130
0.600
E
e3
F
0.38
0.015
15.24
2.29
0.4
2.79
0.55
1.52
0.31
2.54
10.3
8.05
5.08
0.090
0.016
0.046
0.009
0.060
0.110
0.022
0.060
0.012
0.100
0.406
0.317
0.200
G
H
L
1.17
0.22
1.52
M
N
P
7.8
0.307
Q
P053C
8/11
M54/M74HC242/243
SO14 MECHANICAL DATA
mm
inch
DIM.
MIN.
TYP.
MAX.
1.75
0.2
MIN.
TYP.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.003
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
8.55
5.8
8.75
6.2
0.336
0.228
0.344
0.244
E
e
1.27
7.62
0.050
0.300
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.026
G
L
1.27
0.68
M
S
8° (max.)
P013G
9/11
M54/M74HC242/243
PLCC20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
MAX.
0.395
0.356
0.180
A
B
9.78
8.89
4.2
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/M74HC242/243
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
相关型号：
M74HC242M1
HC/UH SERIES, 4-BIT TRANSCEIVER, INVERTED OUTPUT, PDSO14, MICRO, PLASTIC, DIP-14
STMICROELECTR
M74HC243M1
HC/UH SERIES, 4-BIT TRANSCEIVER, TRUE OUTPUT, PDSO14, MICRO, PLASTIC, DIP-14
STMICROELECTR
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