MOTOROLA MC74AC373 Octal transparent latch with 3-state output Datasheet

OCTAL TRANSPARENT
LATCH WITH
3-STATE OUTPUTS
The MC74AC373/74ACT373 consists of eight latches with 3-state outputs for bus
organized system applications. The flip-flops appear transparent to the data when
Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup time is
latched. Data appears on the bus when the Output Enable (OE) is LOW. When OE
is HIGH, the bus output is in the high impedance state.
•
•
•
•
Eight Latches in a Single Package
3-State Outputs for Bus Interfacing
Outputs Source/Sink 24 mA
′ACT373 Has TTL Compatible Inputs
VCC
O7
D7
D6
O6
O5
D5
D4
O4
LE
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
OE
O0
D0
D1
O1
O2
D2
D3
O3
GND
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
PIN NAMES
D0–D7
LE
OE
O0–O7
LOGIC SYMBOL
Data Inputs
Latch Enable Input
Output Enable Input
3-State Latch Outputs
D0 D1 D2 D3 D4 D5 D6 D7
LE
OE
O0 O1 O2 O3 O4 O5 O6 O7
TRUTH TABLE
Inputs
Outputs
OE
LE
Dn
On
H
L
L
L
X
H
H
L
X
L
H
X
Z
L
H
O0
H = HIGH Voltage Level
L = LOW Voltage Level
Z = High Impedance
X = Immaterial
O0 = Previous O0 before LOW-to-HIGH Transition of Clock
FACT DATA
5-1
MC74AC373 MC74ACT373
FUNCTIONAL DESCRIPTION
The MC74AC373/74ACT373 contains eight D-type latches
with 3-state standard outputs. When the Latch Enable (LE)
input is HIGH, data on the Dn inputs enters the latches. In this
condition the latches are transparent, i.e., a latch output will
change state each time its D input changes. When LE is LOW,
the latches store the information that was present on the D
inputs a setup time preceding the HIGH-to-LOW transition of
LE. The 3-state standard outputs are controlled by the Output
Enable (OE) input. When OE is LOW, the standard outputs are
in the 2-state mode. When OE is HIGH, the standard outputs
are in the high impedance mode but this does not interfere with
entering new data into the latches.
LOGIC DIAGRAM
D0
D1
D
D2
D
G
O
D3
D
G
O
D4
D
G
O
D5
D
G
O
D6
D
G
O
D7
D
G
O
D
G
O
G
O
LE
OE
O0
O1
O2
O3
O4
O5
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
FACT DATA
5-2
O6
O7
MC74AC373 MC74ACT373
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
–0.5 to +7.0
V
V
VCC
DC Supply Voltage (Referenced to GND)
Vin
DC Input Voltage (Referenced to GND)
–0.5 to VCC +0.5
Vout
DC Output Voltage (Referenced to GND)
–0.5 to VCC +0.5
V
Iin
DC Input Current, per Pin
±20
mA
Iout
DC Output Sink/Source Current, per Pin
±50
mA
ICC
DC VCC or GND Current per Output Pin
±50
mA
Tstg
Storage Temperature
–65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
Supply Voltage
Vin, Vout
DC Input Voltage, Output Voltage (Ref. to GND)
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
TJ
Junction Temperature (PDIP)
TA
Operating Ambient Temperature Range
IOH
IOL
Min
Typ
Max
′AC
2.0
5.0
6.0
′ACT
4.5
5.0
5.5
0
VCC
VCC @ 3.0 V
150
VCC @ 4.5 V
40
VCC @ 5.5 V
25
VCC @ 4.5 V
10
VCC @ 5.5 V
8.0
Unit
V
V
ns/V
ns/V
140
°C
85
°C
Output Current — High
–24
mA
Output Current — Low
24
mA
–40
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
FACT DATA
5-3
25
MC74AC373 MC74ACT373
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC
74AC
TA = +25°C
TA =
–40°C to +85°C
Typ
VIH
VIL
VOH
Conditions
Guaranteed Limits
Minimum High Level
Input Voltage
3.0
4.5
5.5
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
VOUT = 0.1 V
or VCC – 0.1 V
Maximum Low Level
Input Voltage
3.0
4.5
5.5
1.5
2.25
2.75
0.9
1.35
1.65
0.9
1.35
1.65
V
VOUT = 0.1 V
or VCC – 0.1 V
Minimum High Level
Output Voltage
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
V
2.56
3.86
4.86
2.46
3.76
4.76
0.1
0.1
0.1
0.1
0.1
0.1
3.0
4.5
5.5
0.36
0.36
0.36
0.44
0.44
0.44
3.0
4.5
5.5
VOL
Unit
Maximum Low Level
Output Voltage
3.0
4.5
5.5
0.002
0.001
0.001
IOUT = –50 µA
V
*VIN = VIL or VIH
–12 mA
IOH
–24 mA
–24 mA
IOUT = 50 µA
V
V
*VIN = VIL or VIH
12 mA
IOL
24 mA
24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
IOZ
Maximum
3-State
Current
5.5
±0.5
±5.0
µA
VI (OE) = VIL, VIH
VI = VCC, GND
VO = VCC, GND
5.5
75
mA
VOLD = 1.65 V Max
5.5
–75
mA
VOHD = 3.85 V Min
80
µA
VIN = VCC or GND
IOLD
IOHD
ICC
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
8.0
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
FACT DATA
5-4
MC74AC373 MC74ACT373
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC
74AC
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
Fig.
No.
tPLH
Propagation Delay
Dn to On
3.3
5.0
1.5
1.5
10
7.0
13.5
9.5
1.5
1.5
15
10.5
ns
3-5
tPHL
Propagation Delay
Dn to On
3.3
5.0
1.5
1.5
9.5
7.0
13
9.5
1.5
1.5
14.5
10.5
ns
3-5
tPLH
Propagation Delay
LE to On
3.3
5.0
1.5
1.5
10
7.5
13.5
9.5
1.5
1.5
15
10.5
ns
3-6
tPHL
Propagation Delay
LE to On
3.3
5.0
1.5
1.5
9.5
7.0
12.5
9.5
1.5
1.5
14
10.5
ns
3-6
tPZH
Output Enable Time
3.3
5.0
1.5
1.5
9.0
7.0
11.5
8.5
1.0
1.0
13
9.5
ns
3-7
tPZL
Output Enable Time
3.3
5.0
1.5
1.5
8.5
6.5
11.5
8.5
1.0
1.0
13
9.5
ns
3-8
tPHZ
Output Disable Time
3.3
5.0
1.5
1.5
10
8.0
12.5
11
1.0
1.0
14.5
12.5
ns
3-7
tPLZ
Output Disable Time
3.3
5.0
1.5
1.5
8.0
6.5
11.5
8.5
1.0
1.0
12.5
10
ns
3-8
Unit
Fig.
No.
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
Typ
74AC
74AC
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Dn to LE
3.3
5.0
3.5
2.0
5.5
4.0
6.0
4.5
ns
3-9
th
Hold Time, HIGH or LOW
Dn to LE
3.3
5.0
–3.0
–1.5
1.0
1.0
1.0
1.0
ns
3-9
tw
LE Pulse Width, HIGH
3.3
5.0
4.0
2.0
5.5
4.0
6.0
4.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
FACT DATA
5-5
MC74AC373 MC74ACT373
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74ACT
74ACT
TA = +25°C
TA =
–40°C to +85°C
Typ
Guaranteed Limits
Unit
Conditions
VIH
Minimum High Level
Input Voltage
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
VOUT = 0.1 V
or VCC – 0.1 V
VIL
Maximum Low Level
Input Voltage
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
VOUT = 0.1 V
or VCC – 0.1 V
VOH
Minimum High Level
Output Voltage
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
V
3.86
4.86
3.76
4.76
0.1
0.1
0.1
0.1
4.5
5.5
0.36
0.36
0.44
0.44
V
*VIN = VIL or VIH
24 mA
IOL
24 mA
±0.1
±1.0
µA
VI = VCC, GND
1.5
mA
VI = VCC – 2.1 V
±5.0
µA
VI (OE) = VIL, VIH
VI = VCC, GND
VO = VCC, GND
5.5
75
mA
VOLD = 1.65 V Max
5.5
–75
mA
VOHD = 3.85 V Min
80
µA
VIN = VCC or GND
4.5
5.5
VOL
Maximum Low Level
Output Voltage
4.5
5.5
IIN
Maximum Input
Leakage Current
5.5
∆ICCT
Additional Max. ICC/Input
5.5
IOZ
Maximum
3-State
Current
5.5
IOLD
IOHD
ICC
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
0.001
0.001
0.6
±0.5
5.5
8.0
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-6
V
V
IOUT = –50 µA
*VIN = VIL or VIH
–24 mA
IOH
–24 mA
IOUT = 50 µA
MC74AC373 MC74ACT373
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74ACT
74ACT
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
Fig.
No.
tPLH
Propagation Delay
Dn to On
5.0
2.5
8.5
10
1.5
11.5
ns
3-5
tPHL
Propagation Delay
Dn to On
5.0
2.0
8.0
10
1.5
11.5
ns
3-5
tPLH
Propagation Delay
LE to On
5.0
2.5
8.5
11
2.0
11.5
ns
3-6
tPHL
Propagation Delay
LE to On
5.0
2.0
8.0
10
1.5
11.5
ns
3-6
tPZH
Output Enable Time
5.0
2.0
8.0
9.5
1.5
10.5
ns
3-7
tPZL
Output Enable Time
5.0
2.0
7.5
9.0
1.5
10.5
ns
3-8
tPHZ
Output Disable Time
5.0
2.5
9.0
11
2.5
12.5
ns
3-7
tPLZ
Output Disable Time
5.0
1.5
7.5
8.5
1.0
10
ns
3-8
Unit
Fig.
No.
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74ACT
74ACT
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Typ
Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Dn to LE
5.0
3.0
7.0
8.0
ns
3-9
th
Hold Time, HIGH or LOW
Dn to LE
5.0
0
0
1.0
ns
3-9
tw
LE Pulse Width, HIGH
5.0
2.0
2.0
8.0
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Parameter
Value
Typ
Unit
Test Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0 V
CPD
Power Dissipation Capacitance
40
pF
VCC = 5.0 V
FACT DATA
5-7
MC74AC373 MC74ACT373
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 738–03
ISSUE E
–A–
20
11
1
10
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
B
L
C
–T–
K
SEATING
PLANE
M
N
E
G
F
J
D
20 PL
0.25 (0.010)
20 PL
0.25 (0.010)
M
T A
M
M
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
–A–
20
11
–B–
10X
P
0.010 (0.25)
1
M
B
M
10
20X
J
D
0.010 (0.25)
M
T A
B
S
S
F
R X 45 _
C
–T–
18X
G
SEATING
PLANE
K
T B
M
DIM
A
B
C
D
E
F
G
J
K
L
M
N
INCHES
MIN
MAX
1.010
1.070
0.240
0.260
0.150
0.180
0.015
0.022
0.050 BSC
0.050
0.070
0.100 BSC
0.008
0.015
0.110
0.140
0.300 BSC
0_
15 _
0.020
0.040
MILLIMETERS
MIN
MAX
25.66
27.17
6.10
6.60
3.81
4.57
0.39
0.55
1.27 BSC
1.27
1.77
2.54 BSC
0.21
0.38
2.80
3.55
7.62 BSC
0_
15_
0.51
1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
MILLIMETERS
INCHES
DIM MIN
MAX
MIN
MAX
A
12.65
12.95
0.499
0.510
B
7.40
7.60
0.292
0.299
C
2.35
2.65
0.093
0.104
D
0.35
0.49
0.014
0.019
F
0.50
0.90
0.020
0.035
G
1.27 BSC
0.050 BSC
J
0.25
0.32
0.010
0.012
K
0.10
0.25
0.004
0.009
M
0_
7_
0_
7_
P
10.05
10.55
0.395
0.415
R
0.25
0.75
0.010
0.029
M
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◊
FACT DATA
5-8
*MC74AC373/D*
MC74AC373/D
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