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M74HC240TTR [STMICROELECTRONICS]

OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (INVERTED); 具有三态输出八路总线缓冲器（反相）
M74HC240TTR
型号： M74HC240TTR
厂家： ST    ST
描述：

OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (INVERTED)
具有三态输出八路总线缓冲器（反相）

输出元件
文件： 总10页 (文件大小：206K)
中文：  中文翻译
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M74HC240  
OCTAL BUS BUFFER  
WITH 3 STATE OUTPUTS (INVERTED)  
■
■
■
■
■
■
■
HIGH SPEED:  
= 10ns (TYP.) at V = 6V  
t
PD  
CC  
LOW POWER DISSIPATION:  
= 4µA(MAX.) at T =25°C  
I
CC  
A
HIGH NOISE IMMUNITY:  
= V = 28 % V (MIN.)  
V
NIH  
NIL  
CC  
DIP  
SOP  
TSSOP  
T & R  
SYMMETRICAL OUTPUT IMPEDANCE:  
|I | = I = 6mA (MIN)  
OH  
OL  
BALANCED PROPAGATION DELAYS:  
ORDER CODES  
PACKAGE  
t
t
PLH  
PHL  
TUBE  
WIDE OPERATING VOLTAGE RANGE:  
(OPR) = 2V to 6V  
V
DIP  
SOP  
M74HC240B1R  
M74HC240M1R  
CC  
M74HC240RM13TR  
M74HC240TTR  
PIN AND FUNCTION COMPATIBLE WITH  
74 SERIES 240  
TSSOP  
DESCRIPTION  
This device is designed to be used with 3 state  
memory address drivers, etc.  
All inputs are equipped with protection circuits  
against static discharge and transient excess  
voltage.  
The M74HC240 is an advanced high-speed  
CMOS OCTAL BUS BUFFER (3-STATE)  
fabricated with silicon gate C MOS technology.  
2
G control input governs four BUS BUFFERs.  
PIN CONNECTION AND IEC LOGIC SYMBOLS  
July 2001  
1/10  
M74HC240  
INPUT AND OUTPUT EQUIVALENT CIRCUIT  
PIN DESCRIPTION  
PIN No  
SYMBOL  
1G  
NAME AND FUNCTION  
1
Output Enable Input  
2, 4, 6, 8  
9, 7, 5, 3  
1A1 to 1A4 Data Inputs  
2Y1 to 2Y4 Data Outputs  
2A1 to 2A4 Data Inputs  
11, 13, 15,  
17  
18, 16, 14,  
12  
1Y1 to 1Y4 Data Outputs  
19  
10  
20  
2G  
Output Enable Input  
GND  
Ground (0V)  
V
Positive Supply Voltage  
CC  
TRUTH TABLE  
INPUTS  
OUTPUT  
Yn  
G
An  
L
L
L
H
X
H
L
H
Z
X : Don’t Care  
Z : High Impedance  
ABSOLUTE MAXIMUM RATINGS  
Symbol  
Parameter  
Value  
Unit  
V
Supply Voltage  
-0.5 to +7  
V
V
CC  
V
DC Input Voltage  
-0.5 to V + 0.5  
I
CC  
V
DC Output Voltage  
DC Input Diode Current  
DC Output Diode Current  
DC Output Current  
-0.5 to V + 0.5  
V
O
CC  
I
± 20  
± 20  
mA  
mA  
mA  
mA  
mW  
°C  
IK  
I
OK  
I
± 35  
O
I
or I  
DC V  
or Ground Current  
CC  
± 70  
CC  
GND  
P
Power Dissipation  
500(*)  
-65 to +150  
300  
D
T
Storage Temperature  
Lead Temperature (10 sec)  
stg  
T
°C  
L
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is  
not implied  
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C  
RECOMMENDED OPERATING CONDITIONS  
Symbol  
Parameter  
Value  
Unit  
V
Supply Voltage  
2 to 6  
0 to V  
V
V
CC  
V
Input Voltage  
I
CC  
V
Output Voltage  
0 to V  
CC  
V
O
T
Operating Temperature  
Input Rise and Fall Time  
-55 to 125  
0 to 1000  
0 to 500  
0 to 400  
°C  
ns  
ns  
ns  
op  
V
V
V
= 2.0V  
= 4.5V  
= 6.0V  
CC  
CC  
CC  
t , t  
r
f
2/10  
M74HC240  
DC SPECIFICATIONS  
Test Condition  
Value  
-40 to 85°C -55 to 125°C Unit  
T
= 25°C  
Symbol  
Parameter  
A
V
CC  
(V)  
Min. Typ. Max. Min. Max. Min. Max.  
V
High Level Input  
Voltage  
2.0  
4.5  
6.0  
2.0  
4.5  
6.0  
2.0  
1.5  
3.15  
4.2  
1.5  
3.15  
4.2  
1.5  
3.15  
4.2  
IH  
V
V
V
Low Level Input  
Voltage  
0.5  
1.35  
1.8  
0.5  
1.35  
1.8  
0.5  
1.35  
1.8  
IL  
V
High Level Output  
Voltage  
I =-20 µA  
1.9  
4.4  
5.9  
2.0  
4.5  
6.0  
1.9  
4.4  
1.9  
4.4  
OH  
O
I =-20 µA  
4.5  
6.0  
4.5  
6.0  
2.0  
4.5  
6.0  
4.5  
6.0  
O
I =-20 µA  
5.9  
5.9  
V
V
O
I =-6.0 mA  
4.18 4.31  
4.13  
5.63  
4.10  
5.60  
O
I =-7.8 mA  
5.68  
5.8  
0.0  
0.0  
0.0  
O
V
Low Level Output  
Voltage  
I =20 µA  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
OL  
O
I =20 µA  
O
I =20 µA  
0.1  
0.1  
O
I =6.0 mA  
0.17 0.26  
0.18 0.26  
0.33  
0.33  
0.40  
0.40  
O
I =7.8 mA  
O
I
Input Leakage  
Current  
I
V = V  
or GND  
CC  
6.0  
6.0  
6.0  
± 0.1  
± 0.5  
4
± 1  
± 5  
40  
± 1  
± 10  
80  
µA  
µA  
µA  
I
I
I
High Impedance  
Output Leakage  
Current  
OZ  
V = V or V  
IL  
I
IH  
V
= V or GND  
CC  
O
Quiescent Supply  
Current  
CC  
V = V  
or GND  
CC  
I
3/10  
M74HC240  
AC ELECTRICAL CHARACTERISTICS (C = 50 pF, Input t = t = 6ns)  
L
r
f
Test Condition  
Value  
T
= 25°C  
Symbol  
Parameter  
-40 to 85°C -55 to 125°C Unit  
A
V
C
L
CC  
(V) (pF)  
Min. Typ. Max. Min. Max. Min. Max.  
t
t
Output Transition  
Time  
2.0  
25  
7
60  
12  
75  
19  
90  
18  
TLH THL  
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  
50  
50  
ns  
ns  
ns  
ns  
ns  
ns  
6
10  
13  
15  
t
t
Propagation Delay  
Time  
36  
12  
10  
51  
17  
14  
48  
16  
14  
63  
21  
18  
32  
15  
14  
90  
115  
23  
135  
27  
PLH PHL  
18  
15  
20  
23  
130  
26  
165  
33  
195  
39  
150  
50  
22  
28  
33  
t
t
t
High Impedance  
Output Enable  
Time  
125  
25  
155  
31  
190  
38  
PZL PZH  
R = 1 KΩ  
L
21  
25  
32  
165  
33  
205  
41  
250  
50  
R = 1 KΩ  
150  
50  
L
28  
35  
43  
t
High Impedance  
Output Disable  
Time  
125  
25  
155  
31  
190  
38  
PLZ PHZ  
R = 1 KΩ  
L
21  
26  
32  
CAPACITIVE CHARACTERISTICS  
Test Condition  
Value  
-40 to 85°C -55 to 125°C Unit  
T
= 25°C  
Symbol  
Parameter  
A
V
CC  
(V)  
Min. Typ. Max. Min. Max. Min. Max.  
C
Input Capacitance  
5.0  
5.0  
5
10  
10  
10  
pF  
pF  
IN  
Output  
Capacitance  
C
10  
OUT  
C
Power Dissipation  
Capacitance (note  
1)  
PD  
5.0  
31  
pF  
1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without  
PD  
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I  
= C x V x f + I /8 (per circuit)  
CC(opr)  
PD CC IN CC  
4/10  
M74HC240  
TEST CIRCUIT  
TEST  
SWITCH  
Open  
t
t
t
, t  
PLH PHL  
, t  
V
CC  
PZL PLZ  
, t  
GND  
PZH PHZ  
C
R
R
= 50pF/150pF or equivalent (includes jig and probe capacitance)  
L
1
T
= 1KΩ or equivalent  
= Z  
of pulse generator (typically 50Ω)  
OUT  
WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)  
5/10  
M74HC240  
WAVEFORM 2 :OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)  
6/10  
M74HC240  
Plastic DIP-20 (0.25) MECHANICAL DATA  
mm.  
TYP  
inch  
TYP.  
DIM.  
MIN.  
0.254  
1.39  
MAX.  
MIN.  
0.010  
0.055  
MAX.  
a1  
B
b
1.65  
0.065  
0.45  
0.25  
0.018  
0.010  
b1  
D
E
e
25.4  
1.000  
8.5  
2.54  
22.86  
0.335  
0.100  
0.900  
e3  
F
7.1  
0.280  
0.155  
I
3.93  
L
3.3  
0.130  
Z
1.34  
0.053  
P001J  
7/10  
M74HC240  
SO-20 MECHANICAL DATA  
mm.  
inch  
TYP.  
DIM.  
MIN.  
TYP  
MAX.  
2.65  
0.2  
MIN.  
MAX.  
0.104  
0.008  
0.096  
0.019  
0.012  
A
a1  
a2  
b
0.1  
0.004  
2.45  
0.49  
0.32  
0.35  
0.23  
0.014  
0.009  
b1  
C
0.5  
0.020  
c1  
D
45° (typ.)  
12.60  
10.00  
13.00  
10.65  
0.496  
0.393  
0.512  
0.419  
E
e
1.27  
0.050  
0.450  
e3  
F
11.43  
7.40  
0.50  
7.60  
1.27  
0.75  
0.291  
0.020  
0.300  
0.050  
0.029  
L
M
S
8° (max.)  
PO13L  
8/10  
M74HC240  
TSSOP20 MECHANICAL DATA  
mm.  
inch  
TYP.  
DIM.  
MIN.  
TYP  
MAX.  
1.2  
MIN.  
MAX.  
0.047  
0.006  
0.041  
0.012  
0.0089  
0.260  
0.260  
0.176  
A
A1  
A2  
b
0.05  
0.8  
0.15  
1.05  
0.30  
0.20  
6.6  
0.002  
0.031  
0.007  
0.004  
0.252  
0.244  
0.169  
0.004  
0.039  
1
0.19  
0.09  
6.4  
c
D
6.5  
6.4  
0.256  
0.252  
E
6.2  
6.6  
E1  
e
4.3  
4.4  
4.48  
0.173  
0.65 BSC  
0.0256 BSC  
K
0°  
8°  
0°  
8°  
L
0.45  
0.60  
0.75  
0.018  
0.024  
0.030  
A2  
A
K
L
b
e
A1  
E
c
D
E1  
PIN 1 IDENTIFICATION  
1
0087225C  
9/10  
M74HC240  
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the  
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from  
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications  
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information  
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or  
systems without express written approval of STMicroelectronics.  
© The ST logo is a registered trademark of STMicroelectronics  
© 2001 STMicroelectronics - Printed in Italy - All Rights Reserved  
STMicroelectronics GROUP OF COMPANIES  
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco  
Singapore - Spain - Sweden - Switzerland - United Kingdom  
© http://www.st.com  
10/10  

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