Fairchild MM74HC240 Inverting octal 3-state buffer Datasheet

Revised May 2005
MM74HC240
Inverting Octal 3-STATE Buffer
General Description
Features
The MM74HC240 3-STATE buffer utilizes advanced silicon-gate CMOS technology. It possesses high drive current outputs which enable high speed operation even when
driving large bus capacitances. These circuits achieve
speeds comparable to low power Schottky devices, while
retaining the advantage of CMOS circuitry, i.e., high noise
immunity and low power consumption. It has a fanout of 15
LS-TTL equivalent inputs.
■ Typical propagation delay: 12 ns
■ 3-STATE outputs for connection to system buses
■ Wide power supply range: 2–6V
■ Low quiescent supply current: 80 PA (74 Series)
■ Output current: 6 mA
The MM74HC240 is an inverting buffer and has two active
LOW enables (1G and 2G). Each enable independently
controls 4 buffers.
All inputs are protected from damage due to static discharge by diodes to VCC and ground.
Ordering Code:
Order Number
MM74HC240WM
MM74HC240SJ
MM74HC240MTC
MM74HC240N
Package Number
Package Description
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC20
N20A
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Truth Table
1G
1A
1Y
2G
2A
2Y
L
L
H
L
L
H
L
H
L
L
H
L
H
L
Z
H
L
Z
H
H
Z
H
H
Z
H HIGH Level
L LOW Level
Z HIGH Impedance
Top View
© 2005 Fairchild Semiconductor Corporation
DS005020
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MM74HC240 Inverting Octal 3-STATE Buffer
September 1983
MM74HC240
Logic Diagram
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2
Recommended Operating
Conditions
0.5 to 7.0V
1.5 to VCC 1.5V
DC Output Voltage (VOUT)
0.5 to VCC 0.5V
Clamp Diode Current (IIK, IOK)
r20 mA
r35 mA
DC Output Current, per pin (IOUT)
DC VCC or GND Current, per pin (ICC)
r70 mA
Storage Temperature Range (TSTG)
65qC to 150qC
Supply Voltage (VCC)
DC Input Voltage (VIN)
Min
Max
Supply Voltage (VCC)
2
6
V
DC Input or Output Voltage
0
VCC
V
40
85
qC
(VIN, VOUT)
Operating Temperature Range (TA)
Input Rise or Fall Times
(tr, tf) VCC
Power Dissipation (PD)
(Note 3)
600 mW
S.O. Package only
500 mW
Symbol
VIH
VIL
Parameter
Conditions
ns
VCC
6.0V
400
ns
Note 3: Power Dissipation temperature derating — plastic “N” package: 12 mW/qC from 65qC to 85qC.
VCC
TA
25qC
Typ
TA
40 to 85qC TA 55 to 125qC
Guaranteed Limits
Units
2.0V
1.5
1.5
1.5
V
Input Voltage
4.5V
3.15
3.15
3.15
V
6.0V
4.2
4.2
4.2
V
2.0V
0.5
0.5
0.5
V
4.5V
1.35
1.35
1.35
V
6.0V
1.8
1.8
1.8
V
Maximum LOW Level
Minimum HIGH Level
VI N
VIH or VIL
Output Voltage
|IOUT| d 20 PA
2.0V
2.0
1.9
1.9
1.9
V
4.5V
4.5
4.4
4.4
4.4
V
6.0V
6.0
5.9
5.9
5.9
V
|IOUT| d 6.0 mA
4.5V
4.2
3.98
3.84
3.7
V
|IOUT| d 7.8 mA
6.0V
5.7
5.48
5.34
5.2
V
VIH or VIL
Maximum LOW Level
VIN
VIH or VIL
Output Voltage
|IOUT| d 20 PA
2.0V
0
0.1
0.1
0.1
V
4.5V
0
0.1
0.1
0.1
V
6.0V
0
0.1
0.1
0.1
V
|IOUT| d 6.0 mA
4.5V
0.2
0.26
0.33
0.4
V
|IOUT| d 7.8 mA
6.0V
0.2
0.26
0.33
0.4
V
VIN
VCC or GND
6.0V
r0.1
r1.0
r1.0
PA
VIH or VIL
6.0V
r0.5
r5
r10
PA
6.0V
8.0
80
160
PA
VIN
VIH or VIL
IIN
Maximum Input Current
IOZ
Maximum 3-STATE
VIN
Output Leakage
VOUT
Current
G
ICC
500
Minimum HIGH Level
VIN
VOL
2.0V
(Note 4)
Input Voltage
VOH
ns
4.5V
Note 2: unless otherwise specified all voltages are referenced to ground.
260qC
DC Electrical Characteristics
1000
VCC
Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Lead Temperature (TL)
(Soldering 10 seconds)
Units
VCC or GND
VIH, G
Maximum Quiescent
VIN
Supply Current
IOUT
VIL
VCC or GND
0 PA
Note 4: For a power supply of 5V r10% the worst case output voltages (VOH, and VOL) occur for HC at 4.5V. Thus the 4.5V values should be used when
designing with this supply. Worst case VIH and VIL occur at VCC 5.5V and 4.5V respectively. (The VIH value at 5.5V is 3.85V.) The worst case leakage current (IIN, ICC, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used.
3
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MM74HC240
Absolute Maximum Ratings(Note 1)
(Note 2)
MM74HC240
AC Electrical Characteristics
VCC
5V, TA
25qC, tr
Symbol
tf
6 ns
Conditions
Typ
Guaranteed Limit
Units
tPHL, tPLH
Maximum Propagation Delay
CL
45 pF
12
18
ns
tPZH, tPZL
Maximum Enable Delay
RL
1 k:
to Active Output
CL
45 pF
14
28
ns
Maximum Disable Delay
RL
1 k:
from Active Output
CL
5 pF
13
25
ns
tPHZ, tPLZ
Parameter
AC Electrical Characteristics
VCC
2.0V to 6.0V, CL
Symbol
50 pF, tr
tf
Parameter
tPHL, tPLH Maximum Propagation
Delay
tPZH, tPZL Maximum Output Enable
TIme
tPHZ, tPLZ Maximum Output Disable
Time
6 ns (unless otherwise specified)
Conditions
2.0V
55
100
126
149
ns
2.0V
80
150
190
224
ns
CL
50 pF
4.5V
12
20
25
30
ns
CL
150 pF
4.5V
22
30
38
45
ns
CL
50 pF
6.0V
11
17
21
25
ns
CL
150 pF
6.0V
28
26
32
38
ns
RL
1 k:
CL
50 pF
2.0V
75
150
189
224
ns
CL
150 pF
2.0V
100
200
252
298
ns
CL
50 pF
4.5V
15
30
38
45
ns
CL
150 pF
4.5V
20
40
50
60
ns
CL
50 pF
6.0V
13
26
32
38
ns
CL
150 pF
6.0V
17
34
43
51
ns
RL
1 k:
2.0V
75
150
189
224
ns
CL
50 pF
4.5V
15
30
38
45
ns
6.0V
13
26
32
38
ns
2.0V
60
75
90
ns
4.5V
12
15
18
ns
6.0V
10
13
15
ns
Capacitance (Note 5)
G
VIH
12
G
VIL
50
Maximum Output Capacitance
Note 5: CPD determines the no load dynamic power consumption, PD
IS CPD VCC f I CC.
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Units
150 pF
(per buffer)
COUT
40 to 85qC TA 55 to 125qC
Guaranteed Limits
50 pF
Power Dissipation
Maximum Input Capacitance
TA
CL
Rise and Fall Time
CIN
25qC
Typ
CL
tTLH, tTHL Maximum Output
CPD
TA
VCC
pF
pF
5
10
10
10
pF
10
20
20
20
pF
CPD VCC2 f ICC VCC, and the no load dynamic current consumption,
4
MM74HC240
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
5
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MM74HC240
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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6
MM74HC240
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
7
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MM74HC240 Inverting Octal 3-STATE Buffer
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Package Number N20A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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