MC74LCX373
Low-Voltage CMOS
Octal Transparent Latch
With 5 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
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The MC74LCX373 is a high performance, non−inverting octal
transparent latch operating from a 2.3 to 3.6 V supply. High
impedance TTL compatible inputs significantly reduce current
loading to input drivers while TTL compatible outputs offer improved
switching noise performance. A V
I
specification of 5.5 V allows
MC74LCX373 inputs to be safely driven from 5 V devices.
The MC74LCX373 contains 8 D−type latches with 3−state 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 enabled. When OE
is HIGH, the standard outputs are in the high impedance state, but this
does not interfere with new data entering into the latches.
Features
MARKING
DIAGRAMS
20
20
1
SOIC−20 WB
DW SUFFIX
CASE 751D
1
20
20
1
TSSOP−20
DT SUFFIX
CASE 948E
1
LCX373
A
L, WL
Y, YY
W, WW
G or
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
LCX
373
ALYWG
G
LCX373
AWLYYWWG
•
•
•
•
•
•
•
•
Designed for 2.3 to 3.6 V V
CC
Operation
5 V Tolerant − Interface Capability With 5 V TTL Logic
Supports Live Insertion and Withdrawal
I
OFF
Specification Guarantees High Impedance When V
CC
= 0 V
LVTTL Compatible
LVCMOS Compatible
24 mA Balanced Output Sink and Source Capability
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
Near Zero Static Supply Current in all Three Logic States (10
mA)
Substantially Reduces System Power Requirements
•
Latchup Performance Exceeds 500 mA
•
ESD Performance:
♦
Human Body Model >2000 V
♦
Machine Model >200 V
•
NLV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
•
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
©
Semiconductor Components Industries, LLC, 2013
1
June, 2017 − Rev. 14
Publication Order Number:
MC74LCX373/D
MC74LCX373
OE
LE
V
CC
20
O7
19
D7
18
D6
17
O6
16
O5
15
D5
14
D4
13
O4
12
LE
11
3
D0
1
11
LE
Q
D
5
Q
D
6
Q
D
9
Q
D
LE
Q
D
15
Q
D
LE
Q
D
19
Q
D
O7
16
O6
O5
12
O4
O3
O2
O1
2
O0
4
D1
LE
1
OE
2
O0
3
D0
4
D1
5
O1
6
O2
7
D2
8
D3
9
O3
10
GND
D2
7
LE
Figure 1. Pinout
(Top View)
8
D3
LE
13
PIN NAMES
PINS
OE
LE
D0−D7
O0−O7
FUNCTION
Output Enable Input
Latch Enable Input
Data Inputs
3−State Latch Outputs
D4
14
D5
LE
17
D6
18
D7
LE
Figure 2. Logic Diagram
TRUTH TABLE
INPUTS
OE
L
L
L
L
L
H
H
H
H
H
LE
H
H
L
L
L
L
H
H
L
L
Dn
H
L
h
l
X
X
H
L
h
l
OUTPUTS
On
H
L
H
L
NC
Z
Z
Z
Z
Z
OPERATING MODE
Transparent (Latch Disabled); Read Latch
Latched (Latch Enabled) Read Latch
Hold; Read Latch
Hold; Disabled Outputs
Transparent (Latch Disabled); Disabled Outputs
Latched (Latch Enabled); Disabled Outputs
H
= High Voltage Level
h
= High Voltage Level One Setup Time Prior to the Latch Enable High−to−Low Transition
L
= Low Voltage Level
l
= Low Voltage Level One Setup Time Prior to the Latch Enable High−to−Low Transition
NC = No Change, State Prior to the Latch Enable High−to−Low Transition
X
= High or Low Voltage Level or Transitions are Acceptable
Z
= High Impedance State
For I
CC
Reasons DO NOT FLOAT Inputs
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2
MC74LCX373
MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
Parameter
DC Supply Voltage
DC Input Voltage
DC Output Voltage
Value
−0.5 to +7.0
−0.5
≤
V
I
≤
+7.0
−0.5
≤
V
O
≤
+7.0
−0.5
≤
V
O
≤
V
CC
+ 0.5
I
IK
I
OK
DC Input Diode Current
DC Output Diode Current
−50
−50
+50
I
O
I
CC
I
GND
T
STG
MSL
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
Moisture Sensitivity
±50
±100
±100
−65 to +150
Level 1
Output in 3−State
Output in HIGH or LOW State (Note 1)
V
I
< GND
V
O
< GND
V
O
> V
CC
Condition
Units
V
V
V
V
mA
mA
mA
mA
mA
mA
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. I
O
absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
Supply Voltage
Operating
Data Retention Only
Input Voltage
Output Voltage
(HIGH or LOW State)
(3−State)
HIGH Level Output Current
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
V
CC
= 2.3 V − 2.7 V
LOW Level Output Current
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
V
CC
= 2.3 V − 2.7 V
Operating Free−Air Temperature
Input Transition Rise or Fall Rate, V
IN
from 0.8 V to 2.0 V, V
CC
= 3.0 V
−40
0
Parameter
Min
2.0
1.5
0
0
0
Typ
2.5, 3.3
2.5, 3.3
Max
3.6
3.6
5.5
V
CC
5.5
mA
−24
−12
−8
mA
+24
+12
+8
+85
10
°C
ns/V
V
V
Units
V
V
I
V
O
I
OH
I
OL
T
A
Dt/DV
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3
MC74LCX373
DC ELECTRICAL CHARACTERISTICS
T
A
= −40°C to +85°C
Symbol
V
IH
Characteristic
HIGH Level Input Voltage (Note 2)
Condition
2.3 V
≤
V
CC
≤
2.7 V
2.7 V
≤
V
CC
≤
3.6 V
V
IL
LOW Level Input Voltage (Note 2)
2.3 V
≤
V
CC
≤
2.7 V
2.7 V
≤
V
CC
≤
3.6 V
V
OH
HIGH Level Output Voltage
2.3 V
≤
V
CC
≤
3.6 V; I
OL
= 100
mA
V
CC
= 2.3 V; I
OH
= −8 mA
V
CC
= 2.7 V; I
OH
= −12 mA
V
CC
= 3.0 V; I
OH
= −18 mA
V
CC
= 3.0 V; I
OH
= −24 mA
V
OL
LOW Level Output Voltage
2.3 V
≤
V
CC
≤
3.6 V; I
OL
= 100
mA
V
CC
= 2.3 V; I
OL
= 8 mA
V
CC
= 2.7 V; I
OL
= 12 mA
V
CC
= 3.0 V; I
OL
= 16 mA
V
CC
= 3.0 V; I
OL
= 24 mA
I
OZ
I
OFF
I
IN
I
CC
DI
CC
3−State Output Current
Power Off Leakage Current
Input Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
V
CC
= 3.6 V, V
IN
= V
IH
or V
IL
,
V
OUT
= 0 to 5.5 V
V
CC
= 0, V
IN
= 5.5 V or V
OUT
= 5.5 V
V
CC
= 3.6 V, V
IN
= 5.5 V or GND
V
CC
= 3.6 V, V
IN
= 5.5 V or GND
2.3
≤
V
CC
≤
3.6 V; V
IH
= V
CC
− 0.6 V
V
CC
− 0.2
1.8
2.2
2.4
2.2
0.2
0.6
0.4
0.4
0.55
±5
10
±5
10
500
mA
mA
mA
mA
mA
V
Min
1.7
2.0
0.7
0.8
V
V
Max
Units
V
2. These values of V
I
are used to test DC electrical characteristics only.
AC CHARACTERISTICS
(t
R
= t
F
= 2.5 ns; R
L
= 500
W)
Limits
T
A
= −40°C to +85°C
V
CC
= 3.3 V
±
0.3 V
C
L
= 50 pF
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
s
t
h
t
w
t
OSHL
t
OSLH
Parameter
Propagation Delay
D
n
to O
n
Propagation Delay
LE to O
n
Output Enable Time to HIGH
and LOW Level
Output Disable Time From
High and Low Level
Setup TIme, HIGH or LOW
D
n
to LE
Hold TIme, HIGH or LOW
D
n
to LE
LE Pulse Width, HIGH
Output−to−Output Skew
(Note 3)
Waveform
1
3
2
2
3
3
3
Min
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.3
1.0
1.0
Max
8.0
8.0
8.5
8.5
8.5
8.5
7.5
7.5
V
CC
= 2.7 V
C
L
= 50 pF
Min
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.3
Max
9.0
9.0
9.5
9.5
9.5
9.5
8.5
8.5
V
CC
= 2.5 V
±
0.2 V
C
L
= 30 pF
Min
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
4.0
2.0
4.0
ns
Max
9.6
9.6
10.5
10.5
10.5
10.5
9.0
9.0
Units
ns
ns
ns
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (t
OSHL
) or LOW−to−HIGH (t
OSLH
); parameter
guaranteed by design.
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MC74LCX373
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
V
OLP
V
OLV
Characteristic
Dynamic LOW Peak Voltage (Note 4)
Dynamic LOW Valley Voltage (Note 4)
Condition
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
Min
Typ
0.8
0.6
−0.8
−0.6
Max
Units
V
V
4. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
C
IN
C
I/O
C
PD
Parameter
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Condition
V
CC
= 3.3 V, V
I
= 0 V or V
CC
V
CC
= 3.3 V, V
I
= 0 V or V
CC
10 MHz, V
CC
= 3.3 V, V
I
= 0 V or V
CC
Typical
7
8
25
Units
pF
pF
pF
OE
Vmi
V
CC
Dn
Vmi
t
PLH
Vmo
Vmi
0V
t
PHL
V
OH
On
Vmo
V
OL
On
WAVEFORM 1 − PROPAGATION DELAYS
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
t
PZL
Vmo
t
PLZ
On
t
PZH
Vmo
t
PHZ
Vmi
V
CC
0V
V
OH
V
HZ
V
LZ
V
OL
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
2.7 V
Dn
1.5 V
0V
t
s
LE
1.5 V
t
w
1.5 V
0V
t
PLH
, t
PHL
V
OH
On
1.5 V
V
OL
t
h
2.7 V
Symbol
Vmi
Vmo
V
HZ
V
LZ
3.3 V
±
0.3 V
1.5 V
1.5 V
V
OL
+ 0.3 V
V
OH
− 0.3 V
V
CC
2.7 V
1.5 V
1.5 V
V
OL
+ 0.3 V
V
OH
− 0.3 V
2.5 V
±
0.2 V
V
CC
/2
V
CC
/2
V
OL
+ 0.15 V
V
OH
− 015 V
WAVEFORM 3 − LE to On PROPAGATION DELAYS, LE MINIMUM
PULSE WIDTH, Dn to LE SETUP AND HOLD TIMES
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns except when noted
Figure 3. AC Waveforms
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