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Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
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Revised May 2005
MM74HC373
3-STATE Octal D-Type Latch
General Description
Features
The MM74HC373 high speed octal D-type latches utilize
advanced silicon-gate CMOS technology. They possess
the high noise immunity and low power consumption of
standard CMOS integrated circuits, as well as the ability to
drive 15 LS-TTL loads. Due to the large output drive capability and the 3-STATE feature, these devices are ideally
suited for interfacing with bus lines in a bus organized system.
■ Typical propagation delay: 18 ns
■ Wide operating voltage range: 2 to 6 volts
■ Low input current: 1 PA maximum
■ Low quiescent current: 80 PA maximum (74 Series)
■ Output drive capability: 15 LS-TTL loads
When the LATCH ENABLE input is HIGH, the Q outputs
will follow the D inputs. When the LATCH ENABLE goes
LOW, data at the D inputs will be retained at the outputs
until LATCH ENABLE returns HIGH again. When a high
logic level is applied to the OUTPUT CONTROL input, all
outputs go to a high impedance state, regardless of what
signals are present at the other inputs and the state of the
storage elements.
The 74HC logic family is speed, function, and pin-out compatible with the standard 74LS logic family. All inputs are
protected from damage due to static discharge by internal
diode clamps to VCC and ground.
Ordering Code:
Order Number
Package Number
MM74HC373WM
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
MM74HC373SJ
MM74HC373MTC
MM74HC373N
MTC20
N20A
Package Description
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
Pin Assignments for DIP, SOIC, SOP and TSSOP
Output
Latch
Control
Enable
Data
373
L
H
H
L
H
L
L
L
L
X
Q0
H
X
X
Z
Output
H
H HIGH Level
L LOW Level
Q0 Level of output before steady-state input conditions were established.
Z High Impedance
Top View
© 2005 Fairchild Semiconductor Corporation
DS005335
www.fairchildsemi.com
MM74HC373 3-STATE Octal D-Type Latch
September 1983
MM74HC373
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions
(Note 2)
Supply Voltage (VCC)
DC Input Voltage (VIN )
DC Output Voltage (VOUT)
Clamp Diode Current (IIK, IOK)
DC Output Current, per pin (IOUT)
DC VCC or GND Current, per pin (ICC)
Storage Temperature Range (TSTG)
0.5 to 7.0V
1.5 to VCC 1.5V
0.5 to VCC 0.5V
r20 mA
r35 mA
r70 mA
65qC to 150qC
Supply Voltage (VCC)
600 mW
S.O. Package only
500 mW
(VIN,VOUT )
Operating Temperature Range (TA)
Units
6
V
0
VCC
V
40
85
qC
Input Rise or Fall Times
(tr, tf) VCC
2.0V
1000
ns
VCC
4.5V
500
ns
VCC
6.0V
400
ns
Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Lead Temperature (TL)
Note 2: Unless otherwise specified all voltages are referenced to ground.
260 qC
(Soldering 10 seconds)
Max
2
DC Input or Output Voltage
Power Dissipation (PD)
(Note 3)
Min
Note 3: Power Dissipation temperature derating — plastic “N” package:
12 mW/qC from 65qC to 85qC.
DC Electrical Characteristics
Symbol
VIH
VIL
VOH
Parameter
25qC
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
Maximum LOW Level
2.0V
0.5
0.5
0.5
V
Input Voltage
4.5V
1.35
1.35
1.35
V
6.0V
1.8
1.8
1.8
V
Minimum HIGH Level
VIN
Output Voltage
|IOUT| d 20 PA
VIH or VIL
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
Output Voltage
|IOUT| d 20 PA
VIH or VIL
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
Maximum 3-STATE
VIN
VIH or VIL, OC
6.0V
r0.5
r5
r10
PA
Output Leakage
VOUT
6.0V
8.0
80
160
PA
VIN
IIN
TA
Typ
Minimum HIGH Level
VIN
VOL
VCC
Conditions
Maximum Input
VIH or VIL
Current
IOZ
VIH
VCC or GND
Current
ICC
Maximum Quiescent
VIN
Supply Current
IOUT
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.
www.fairchildsemi.com
2
MM74HC373
AC Electrical Characteristics
VCC
5V, TA
25qC, tr
tf 6 ns
Symbol
Parameter
Conditions
Guaranteed
Typ
Limit
Units
tPHL, tPLH
Maximum Propagation Delay, Data to Q CL
45 pF
18
25
ns
tPHL, tPLH
Maximum Propagation Delay, LE to Q
CL
45 pF
21
30
ns
tPZH, tPZL
Maximum Output Enable Time
RL
1 k:
20
28
ns
CL
45 pF
RL
1 k:
18
25
ns
CL
5 pF
tPHZ, tPLZ
Maximum Output Disable Time
tS
Minimum Set Up Time
5
ns
tH
Minimum Hold Time
10
ns
tW
Minimum Pulse Width
16
ns
9
AC Electrical Characteristics
VCC
2.06.0V, CL
Symbol
50 pF, tr
tf 6 ns (unless otherwise specified)
tPHL, tPLH Maximum Propagation
Delay, Data to Q
tPHL, tPLH Maximum Propagation
Delay, LE to Q
TA
25qC
TA
40 to 85qC TA 55 to 125qC
Conditions
VCC
CL
50 pF
2.0V
50
150
188
225
ns
CL
150 pF
2.0V
80
200
250
300
ns
CL
50 pF
4.5V
22
30
37
45
ns
CL
150 pF
4.5V
30
40
50
60
ns
CL
50 pF
6.0V
19
26
31
39
ns
CL
150 pF
6.0V
26
35
44
53
ns
CL
50 pF
2.0V
63
175
220
263
ns
CL
150 pF
2.0V
110
225
280
338
ns
CL
50 pF
4.5V
25
35
44
52
ns
CL
150 pF
4.5V
35
45
56
68
ns
CL
50 pF
6.0V
21
30
37
45
ns
CL
150 pF
6.0V
28
39
49
59
ns
Parameter
Typ
Guaranteed Limits
Units
RL
1 k:
CL
50 pF
2.0V
50
150
188
225
ns
CL
150 pF
2.0V
80
200
250
300
ns
CL
50 pF
4.5V
21
30
37
45
ns
CL
150 pF
4.5V
30
40
50
60
ns
CL
50 pF
6.0V
19
26
31
39
ns
CL
150 pF
6.0V
26
35
44
53
ns
tPHZ, tPLZ Maximum Output Disable
RL
1 k:
2.0V
50
150
188
225
ns
Disable Time
CL
50 pF
4.5V
21
30
37
45
ns
6.0V
19
tPZH, tPZL Maximum Output
Enable Time
tS
tH
tW
Minimum Set Up Time
Minimum Hold Time
Minimum Pulse Width
tTHL, tTLH Maximum Output Rise
CL
50 pF
and Fall Time
CPD
CIN
26
31
39
ns
2.0V
50
60
75
ns
4.5V
9
13
15
ns
6.0V
9
11
13
ns
2.0V
5
5
5
ns
4.5V
5
5
5
ns
6.0V
5
5
5
ns
80
100
120
ns
2.0V
30
4.5V
10
16
20
24
ns
6.0V
9
14
18
20
ns
ns
2.0V
25
60
75
90
4.5V
7
12
15
18
ns
6.0V
6
10
13
15
ns
Power Dissipation
(per latch)
Capacitance (Note 5)
OC
VCC
30
OC
GND
50
Maximum Input Capacitance
5
3
pF
pF
10
10
10
pF
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MM74HC373
AC Electrical Characteristics
Symbol
COUT
Parameter
(Continued)
Conditions
VCC
Maximum Output
TA
25qC
Typ
15
TA
40 to 85qC TA 55 to 125qC
20
20
20
Capacitance
Note 5: CPD determines the no load dynamic power consumption, PD
IS CPD VCC f ICC.
www.fairchildsemi.com
CPD VCC2 f ICC VCC, and the no load dynamic current consumption,
4
Units
Guaranteed Limits
pF
MM74HC373
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
5
www.fairchildsemi.com
MM74HC373
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
www.fairchildsemi.com
6
MM74HC373
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
www.fairchildsemi.com
MM74HC373 3-STATE Octal D-Type Latch
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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www.fairchildsemi.com
8
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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