The LCX16374 consists of sixteen edge-triggered flip-flops
with individual D-type inputs and 3-STATE true outputs.
The device is byte controlled with each byte functioning
identically, but independent of the other. The control pins
can be shorted together to obtain full 16-bit operation. Each
byte has a buffered clock and buffered Output Enable com-
mon to all flip-flops within that byte. The description which
follows applies to each byte. Each flip-flop will store the
state of their individual D inputs that meet the setup and
hold time requirements on the LOW-to-HIGH Clock (CP
n
)
transition. With the Output Enable (OE
n
) LOW, the con-
tents of the flip-flops are available at the outputs. When
OE
n
is HIGH, the outputs go to the high impedance state.
Operation of the OE
n
input does not affect the state of the
flip-flops.
Logic Diagrams
Byte 1 (0:7)
Byte 2 (8:15)
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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74LCX16374
Absolute Maximum Ratings
(Note 4)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
Conditions
Units
V
V
3-STATE
Output in HIGH or LOW State (Note 5)
V
I
GND
V
O
GND
V
O
!
V
CC
V
mA
mA
mA
mA
mA
0.5 to
7.0
0.5 to
7.0
0.5 to
7.0
0.5 to V
CC
0.5
50
50
50
r
50
r
100
r
100
65 to
150
q
C
Note 4:
The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 5:
I
O
Absolute Maximum Rating must be observed.
Recommended Operating Conditions
(Note 6)
Symbol
V
CC
V
I
V
O
I
OH
/I
OL
Supply Voltage
Input Voltage
Output Voltage
Output Current
HIGH or LOW State
3-STATE
V
CC
V
CC
V
CC
T
A
Free-Air Operating Temperature
Input Edge Rate, V
IN
0.8V – 2.0V, V
CC
3.0V
3.0V
3.6V
2.7V
3.0V
2.3V
2.7V
Parameter
Operating
Data Retention
Min
2.0
1.5
0
0
0
Max
3.6
3.6
5.5
V
CC
5.5
Units
V
V
V
r
24
r
12
r
8
40
0
85
10
mA
q
C
ns/V
'
t/
'
V
Note 6:
Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
I
OH
I
OH
I
OH
I
OH
I
OH
V
OL
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
OL
I
I
I
OZ
I
OFF
Input Leakage Current
3-STATE Output Leakage
Power-Off Leakage Current
Conditions
V
CC
(V)
2.3
2.7
2.7
3.6
2.3
2.7
2.7
3.6
T
A
40
q
C to
85
q
C
Max
Min
1.7
2.0
Units
V
0.7
0.8
V
CC
0.2
1.8
2.2
2.4
2.2
0.2
0.6
0.4
0.4
0.55
V
100
P
A
8 mA
12 mA
18 mA
24 mA
100
P
A
8 mA
12 mA
16 mA
24 mA
2.3
3.6
2.3
2.7
3.0
3.0
2.3
3.6
2.3
2.7
3.0
3.0
2.3
3.6
2.3
3.6
0
V
V
0
d
V
I
d
5.5V
0
d
V
O
d
5.5V
V
I
V
IH
or V
IL
5.5V
V
I
or V
O
r
5.0
r
5.0
10
P
A
P
A
P
A
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4
74LCX16374
DC Electrical Characteristics
Symbol
I
CC
Parameter
Quiescent Supply Current
Increase in I
CC
per Input
V
I
V
IH
(Continued)
V
CC
(V)
V
CC
or GND
V
CC
0.6V
2.3
3.6
2.3
3.6
2.3
3.6
T
A
Conditions
40
q
C to
85
q
C
Max
20
Units
Min
3.6V
d
V
I
, V
O
d
5.5V (Note 7)
r
20
500
P
A
P
A
'
I
CC
Note 7:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
T
A
Symbol
Parameter
V
CC
C
L
Min
f
MAX
t
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
S
t
H
t
W
t
OSHL
t
OSLH
Setup Time
Hold Time
Pulse Width
Output to Output Skew (Note 8)
Output Disable Time
Maximum Clock Frequency
Propagation Delay
CP to O
n
Output Enable time
170
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.0
1.0
1.0
6.2
6.2
6.1
6.1
6.0
6.0
1.5
1.5
1.5
1.5
1.5
1.5
2.5
1.5
3.0
6.5
6.5
6.3
6.3
6.2
6.2
1.5
1.5
1.5
1.5
1.5
1.5
3.0
2.0
3.5
7.4
7.4
7.9
7.9
7.2
7.2
3.3V
r
0.3V
50 pF
Max
40
q
to
85
q
C, R
L
V
CC
C
L
Min
2.7V
50 pF
Max
500
:
V
CC
C
L
Min
2.5V
r
0.2V
30 pF
Max
MHz
ns
ns
ns
ns
ns
ns
ns
Units
Note 8:
Skew is defined as the absolute value of the differences 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
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