74VCX162374 Low Voltage 16-Bit D-Type Flip-Flop
January 2000
Revised June 2005
74VCX162374
Low Voltage 16-Bit D-Type Flip-Flop
with 3.6V Tolerant Inputs and Outputs
and 26: Series Resistors in Outputs
General Description
The VCX162374 contains sixteen non-inverting D-type flip-
flops with 3-STATE outputs and is intended for bus oriented
applications. The device is byte controlled. A buffered clock
(CP) and output enable (OE) are common to each byte and
can be shorted together for full 16-bit operation.
The VCX162374 is also designed with 26
:
series resistors
in the outputs. This design reduces line noise in applica-
tions such as memory address drivers, clock drivers and
bus transceivers/transmitters.
The 74VCX162374 is designed for low voltage (1.4V to
3.6V) V
CC
applications with I/O compatibility up to 3.6V.
The 74VCX162374 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.4V–3.6V V
CC
supply operation
s
3.6V tolerant inputs and outputs
s
26
:
series resistors in outputs
s
t
PD
(CLK to O
n
)
3.4 ns max for 3.0V to 3.6V V
CC
s
Power-off high impedance inputs and outputs
s
Supports live insertion and withdrawal (Note 1)
s
Static Drive (I
OH
/I
OL
)
r
12 mA @ 3.0V V
CC
s
Uses patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 300 mA
s
ESD performance:
Human body model
!
2000V
Machine model
!
200V
Note 1:
To ensure the high-impedance state during power up or power
down, OE should be tied to V
CC
through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Order Number
74VCX162374MTD
Package
Number
MTD48
Package Descriptions
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
OE
n
CP
n
I
0
–I
15
O
0
–O
15
Description
Output Enable Input (Active LOW)
Clock Pulse Input
Inputs
Outputs
© 2005 Fairchild Semiconductor Corporation
DS500235
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74VCX162374
Connection Diagram
Truth Tables
Inputs
CP
1
Outputs
I
0
–I
7
H
L
X
X
O
0
–O
7
H
L
O
0
Z
Outputs
I
8
–I
15
H
L
X
X
O
8
–O
15
H
L
O
0
Z
OE
1
L
L
L
H
Inputs
CP
2
L
X
L
X
OE
2
L
L
L
H
H
L
X
Z
O
0
HIGH Voltage Level
LOW Voltage Level
Immaterial (HIGH or LOW, inputs may not float)
High Impedance
Previous O
0
before HIGH-to-LOW of CP
Functional Description
The 74VCX162374 consists of sixteen edge-triggered flip-
flops with individual D-type inputs and 3-STATE true out-
puts. The device is byte controlled with each byte function-
ing identically, but independent of the other. The control
pins can be shorted together to obtain full 16-bit operation.
Each clock has a buffered clock and buffered Output
Enable common 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 I 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 contents of the flip-flops are available at the outputs.
When OE
n
is HIGH, the outputs go to the high impedance
state. Operations of the OE
n
input does not affect the state
of the flip-flops.
Logic Diagram
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.
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2
74VCX162374
Absolute Maximum Ratings
(Note 2)
Supply Voltage (V
CC
)
DC Input Voltage (V
I
)
Output Voltage (V
O
)
Outputs 3-STATED
Outputs Active (Note 3)
DC Input Diode Current (I
IK
) V
I
0V
DC Output Diode Current (I
OK
)
V
O
0V
V
O
!
V
CC
DC Output Source/Sink Current
(I
OH
/I
OL
)
DC V
CC
or GND Current per
Supply Pin (I
CC
or GND)
Storage Temperature Range (T
STG
)
0.5V to
4.6V
0.5V to
4.6V
0.5V to
4.6V
0.5V to V
CC
0.5V
50 mA
50 mA
50 mA
r
50 mA
r
100 mA
65
q
C to
150
q
C
Recommended Operating
Conditions
(Note 4)
Power Supply
Operating
Input Voltage
Output Voltage (V
O
)
Output in Active States
Output in “OFF” State
Output Current in I
OH
/I
OL
V
CC
V
CC
V
CC
V
CC
3.0V to 3.6V
2.3V to 2.7V
1.65V to 2.3V
1.4V to 1.6V
0V to V
CC
0.0V to 3.6V
1.4V to 3.6V
0.3V to
3.6V
Free Air Operating Temperature (T
A
)
Minimum Input Edge Rate (
'
t/
'
V)
V
IN
0.8V to 2.0V, V
CC
3.0V
r
12 mA
r
8 mA
r
3 mA
r
1 mA
40
q
C to
85
q
C
10 ns/V
Note 2:
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 Rat-
ings. The “Recommended Operating Conditions” table will define the condi-
tions for actual device operation.
Note 3:
I
O
Absolute Maximum Rating must be observed.
Note 4:
Floating or unused inputs must be held HIGH or LOW.
DC Electrical Characteristics
Symbol
V
IH
Parameter
HIGH Level Input Voltage
Conditions
V
CC
(V)
2.7 - 3.6
2.3 - 2.7
1.65 - 2.3
1.4 - 1.6
V
IL
LOW Level Input Voltage
2.7 - 3.6
2.3 - 2.7
1.65 - 2.3
1.4 - 1.6
V
OH
HIGH Level Output Voltage
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
Min
2.0
1.6
0.65 x V
CC
0.65 x V
CC
0.8
0.7
0.35 x V
CC
0.35 x V
CC
V
CC
- 0.2
2.2
2.4
2.2
V
CC
- 0.2
2.0
1.8
1.7
V
CC
- 0.2
1.25
V
CC
- 0.2
1.05
V
V
V
Max
Units
100
P
A
6 mA
8 mA
12 mA
100
P
A
4 mA
6 mA
8 mA
100
P
A
3 mA
100
P
A
1 mA
2.7 - 3.6
2.7
3.0
3.0
2.3 - 2.7
2.3
2.3
2.3
1.65 - 2.3
1.65
1.4 - 1.6
1.4
3
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74VCX162374
DC Electrical Characteristics
Symbol
V
OL
Parameter
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
OL
I
I
I
OZ
I
OFF
I
CC
Input Leakage Current
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
(Continued)
V
CC
(V)
100
P
A
6 mA
8 mA
12 mA
100
P
A
6 mA
8 mA
100
P
A
3 mA
100
P
A
1 mA
V
IH
or V
IL
2.7 - 3.6
2.7
3.0
3.0
2.3 - 2.7
2.3
2.3
1.65 - 2.3
1.65
1.4 - 1.6
1.4
1.4 - 3.6
1.4 - 3.6
0
1.4 - 3.6
1.4 - 3.6
2.7 - 3.6
0.2
0.4
0.55
0.8
0.2
0.4
0.6
0.2
0.3
0.2
0.35
V
Conditions
Min
Max
Units
0
d
V
I
d
3.6V
0
d
V
O
d
3.6V, V
I
0
d
(V
I
, V
O
)
d
3.6V
V
I
V
IH
V
CC
or GND
V
CC
0.6V
V
CC
d
(V
I
, V
O
)
d
3.6V (Note 5)
r
5.0
r
10.0
10.0
20.0
P
A
P
A
P
A
P
A
P
A
r
20.0
750
'
I
CC
Note 5:
Outputs disabled or 3-STATE only.
AC Electrical Characteristics
Symbol
f
MAX
Parameter
Maximum Clock Frequency
C
L
(Note 6)
Conditions
V
CC
(V)
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
T
A
40
q
C to
85
q
C
Max
Units
Figure
Number
Min
250
200
100
80
0.8
1.0
1.5
1.0
0.8
1.0
1.5
1.0
0.8
1.0
1.5
1.0
1.5
1.5
2.5
3.0
1.0
1.0
1.0
2.0
30 pF, R
L
500
:
ns
C
L
t
PHL
t
PLH
Propagation Delay
CP
n
to O
n
C
L
t
PZL
t
PZH
C
L
t
PLZ
t
PHZ
C
L
t
S
Setup Time
C
L
Output Disable Time
C
L
Output Enable Time
C
L
C
L
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
3.4
4.8
9.6
19.2
3.9
5.4
9.8
19.6
4.0
4.4
7.9
15.8
ns
Figures
1, 3, 4
Figures
7, 9, 10
Figures
1, 6
Figures
6, 7
Figures
1, 6
Figures
6, 7
ns
Figures
1, 3, 4
Figures
7, 9, 10
ns
Figures
1, 2
Figures
7, 8
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
ns
C
L
t
H
Hold Time
C
L
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
ns
C
L
15 pF, R
L
2k
:
1.5
r
0.1
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4
74VCX162374
AC Electrical Characteristics
Symbol
t
W
Parameter
Pulse Width
C
L
(Continued)
V
CC
(V)
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
T
A
1.5
1.5
4.0
4.0
0.5
0.5
0.75
1.5
ns
ns
Figures
1, 5
Figures
5, 7
40
q
C to
85
q
C
Max
Conditions
30 pF, R
L
500
:
Units
Figure
Number
Min
C
L
t
OSHL
t
OSLH
Output to Output Skew
(Note 7)
C
L
Note 6:
For C
L
15 pF, R
L
30 pF, R
L
2k
:
500
:
1.5
r
0.1
3.3
r
0.3
2.5
r
0.2
1.8
r
0.15
C
L
15 pF, R
L
2k
:
1.5
r
0.1
50
P
F, add approximately 300 ps to the AC maximum specification.
Note 7:
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
).
Dynamic Switching Characteristics
Symbol
V
OLP
Parameter
Quiet Output Dynamic Peak V
OL
C
L
30 pF, V
IH
Conditions
V
CC
, V
IL
0V
V
CC
(V)
1.8
2.5
3.3
V
OLV
Quiet Output Dynamic Valley V
OL
C
L
30 pF, V
IH
V
CC
, V
IL
0V
1.8
2.5
3.3
V
OHV
Quiet Output Dynamic Valley V
OH
C
L
30 pF, V
IH
V
CC
, V
IL
0V
1.8
2.5
3.3
T
A
25
q
C
Typical
0.15
0.25
0.35
V
Units
0.15
0.25
0.35
1.55
2.05
2.65
V
V
Capacitance
Symbol
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Parameter
V
CC
V
I
V
I
V
CC
Conditions
1.8V, 2.5V or 3.3V, V
I
0V or V
CC
, V
CC
0V or V
CC
, f
10 MHz,
0V or V
CC
T
A
25
q
C
Typical
6.0
7.0
20.0
Units
pF
pF
pF
1.8V, 2.5V or 3.3V
1.8V, 2.5V or 3.3V
5
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