74VCXH16374 Low Voltage 16-Bit D-Type Flip-Flop with Bushold
January 2000
Revised March 2000
74VCXH16374
Low Voltage 16-Bit D-Type Flip-Flop with Bushold
General Description
The VCXH16374 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 VCXH16374 data inputs include active bushold cir-
cuitry, eliminating the need for external pull-up resistors to
hold unused or floating data inputs at a valid logic level.
The 74VCXH16374 is designed for low voltage (1.65V to
3.6V) V
CC
applications with output compatibility up to 3.6V.
The 74VCXH16374 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.65V–3.6V V
CC
supply operation
s
3.6V tolerant control inputs and outputs
s
Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
s
t
PD
3.0 ns max for 3.0V to 3.6V V
CC
3.9 ns max for 2.3V to 2.7V V
CC
7.8 ns max for 1.65V to 1.95V V
CC
s
Static Drive (I
OH
/I
OL
)
±24
mA @ 3.0V V
CC
±18
mA @ 2.3V V
CC
±6
mA @ 1.65V 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
Ordering Code:
Order Number
74VCXH16374MTD
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
Bushold Inputs
Outputs
© 2000 Fairchild Semiconductor Corporation
DS500228
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74VCXH16374
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
L
X
OE
1
L
L
L
H
Inputs
CP
2
L
X
OE
2
L
L
L
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial (HIGH or LOW, control inputs may not float)
Z
=
High Impedance
O
0
=
Previous O
0
before HIGH-to-LOW of CP
Functional Description
The 74VCXH16374 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
74VCXH16374
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Input Voltage (V
I
)
OE
n
, CP
n
I
0
– I
15
Output Voltage (V
O
)
Outputs 3-STATED
Outputs Active (Note 2)
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
)
±100
mA
−65°C
to
+150°C
±50
mA
−50
mA
+50
mA
−50
mA
−0.5V
to
+4.6V
−0.5V
to V
CC
+0.5V
−0.5V
to 4.6V
−0.5V
to V
CC
+
0.5V
−0.5V
to
+4.6V
Recommended Operating
Conditions
(Note 3)
Power Supply
Operating
Data Retention Only
Input Voltage
Output Voltage (V
O
)
Output in Active States
Output in “OFF” State
Output Current in I
OH
/I
OL
V
CC
=
3.0V to 3.6V
V
CC
=
2.3V to 2.7V
V
CC
=
1.65V to 2.3V
Free Air Operating Temperature (T
A
)
Minimum Input Edge Rate (∆t/∆V)
V
IN
=
0.8V to 2.0V, V
CC
=
3.0V
10 ns/V
Note 1:
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 2:
I
O
Absolute Maximum Rating must be observed.
Note 3:
Floating or unused control inputs must be held HIGH or LOW.
1.65V to 3.6V
1.2V to 3.6V
−0.3V
to V
CC
0V to V
CC
0.0V to 3.6V
±24
mA
±18
mA
±6
mA
−40°C
to
+85°C
DC Electrical Characteristics (2.7V
<
V
CC
≤
3.6V)
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
I
OH
= −100 µA
I
OH
= −12
mA
I
OH
= −18
mA
I
OH
= −24
mA
V
OL
LOW Level Output Voltage
I
OL
=
100
µA
I
OL
=
12 mA
I
OL
=
18 mA
I
OL
=
24 mA
I
I
I
I(HOLD)
I
I(OD)
I
OZ
I
OFF
I
CC
∆I
CC
Input Leakage Current
Bushold Input Minimum
Drive Hold Current
Bushold Input Over-Drive
Current to Change State
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
Control Pins
Data Pins
0
≤
V
I
≤
3.6V
V
I
=
V
CC
or GND
V
IN
=
0.8V
V
IN
=
2.0V
(Note 4)
(Note 5)
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
O
)
≤
3.6V (Note 6)
V
IH
=
V
CC
−0.6V
Note 4:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 5:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 6:
Outputs disabled or 3-STATE only.
Conditions
V
CC
(V)
2.7
−
3.6
2.7
−
3.6
2.7
−
3.6
2.7
3.0
3.0
2.7
−
3.6
2.7
3.0
3.0
2.7
−
3.6
2.7
−
3.6
3.0
3.0
3.6
3.6
2.7
−
3.6
0
2.7
−
3.6
2.7
−
3.6
2.7
−
3.6
Min
2.0
Max
Units
V
0.8
V
CC
−
0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
±5.0
±5.0
75
−75
450
−450
±10
10
20
±20
750
V
V
V
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
3
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74VCXH16374
DC Electrical Characteristics (2.3V
≤
V
CC
≤
2.7V)
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
I
OH
= −100 µA
I
OH
= −6
mA
I
OH
= −12
mA
I
OH
= −18
mA
V
OL
LOW Level Output Voltage
I
OL
=
100
µA
I
OL
=
12 mA
I
OL
=
18 mA
I
I
I
I(HOLD)
I
I(OD)
I
OZ
I
OFF
I
CC
Input Leakage Current
Bushold Input Minimum
Drive Hold Current
Bushold Input Over-Drive
Current to Change State
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Control Pins
Data Pins
0
≤
V
I
≤
3.6V
V
I
=
V
CC
or GND
V
IN
=
0.7V
V
IN
=
1.6V
(Note 7)
(Note 8)
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
O
)
≤
3.6V (Note 9)
Note 7:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 8:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 9:
Outputs disabled or 3-STATE only.
Conditions
V
CC
(V)
2.3
−
2.7
2.3
−
2.7
2.3
−
2.7
2.3
2.3
2.3
2.3
−
2.7
2.3
2.3
2.3
−
2.7
2.3
−
2.7
2.3
2.3
2.7
2.7
2.3
−
2.7
0
2.3
−
2.7
2.3
−
2.7
Min
1.6
Max
Units
V
0.7
V
CC
−
0.2
2.0
1.8
1.7
0.2
0.4
0.6
±5.0
±5.0
45
-45
300
−300
±10
10
20
±20
V
V
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
DC Electrical Characteristics (1.65V
≤
V
CC
<
2.3V)
Symbol
V
IH
V
IL
V
OH
V
OL
I
I
I
I(HOLD)
I
I(OD)
I
OZ
I
OFF
I
CC
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
Input Leakage Current
Bushold Input Minimum
Drive Hold Current
Bushold Input Over-Drive
Current to Change State
3-STATE Output Leakage
Power-OFF Leakage Current
Quiescent Supply Current
Control Pins
Data Pins
I
OH
= −100 µA
I
OH
= −6
mA
I
OL
=
100
µA
I
OL
=
6 mA
0
≤
V
I
≤
3.6V
V
I
=
V
CC
or GND
V
IN
=
0.57V
V
IN
=
1.07V
(Note 10)
(Note 11)
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
O
)
≤
3.6V (Note 12)
Note 10:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 11:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 12:
Outputs disabled or 3-STATE only.
Conditions
V
CC
(V)
1.65 - 2.3
1.65 - 2.3
1.65 - 2.3
1.65
1.65 - 2.3
1.65
1.65 - 2.3
1.65 - 2.3
1.65
1.65
1.95
1.95
1.65 - 2.3
0
1.65 - 2.3
1.65 - 2.3
Min
0.65
×
V
CC
Max
Units
V
0.35
×
V
CC
V
CC
−
0.2
1.25
0.2
0.3
±5.0
±5.0
25
-25
200
−200
±10
10
20
±20
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
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4
74VCXH16374
AC Electrical Characteristics
Symbol
Parameter
(Note 13)
T
A
= −40°C
to
+85°C,
C
L
=
30 pF, R
L
=
500Ω
V
CC
=
3.3V
±
0.3V
Min
Max
3.0
3.5
3.5
250
0.8
0.8
0.8
1.5
1.0
1.5
0.5
V
CC
=
2.5V
±
0.2V
Min
200
1.0
1.0
1.0
1.5
1.0
1.5
0.5
3.9
4.6
3.8
Max
V
CC
=
1.8V
±
0.15V
Min
100
1.5
1.5
1.5
2.5
1.0
4.0
0.75
7.8
9.2
6.8
Max
MHz
ns
ns
ns
ns
ns
ns
ns
Units
f
MAX
t
PHL
, t
PLH
t
PZL
, t
PZH
t
PLZ
, t
PHZ
t
S
t
H
t
W
t
OSHL
t
OSLH
Maximum Clock Frequency
Prop Delay CP to O
n
Output Enable Time
Output Disable Time
Setup Time
Hold Time
Pulse Width
Output to Output Skew
(Note 14)
Note 13:
For C
L
=
50
P
F, add approximately 300 ps to the AC maximum specification.
Note 14:
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
Conditions
C
L
=
30 pF, V
IH
=
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°C
Typical
0.25
0.6
0.8
−0.25
−0.6
−0.8
1.5
1.9
2.2
V
V
V
Units
Capacitance
Symbol
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Parameter
Conditions
V
CC
=
1.8V, 2.5V or 3.3V, V
I
=
0V or V
CC
V
I
=
0V or V
CC
, V
CC
=
1.8V, 2.5V or 3.3V
V
I
=
0V or V
CC
, f
=
10 MHz,
V
CC
=
1.8V, 2.5V or 3.3V
T
A
= +25°C
Typical
6
7
20
Units
pF
pF
pF
5
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