2000 Fairchild Semiconductor Corporation
DS500226
www.fairchildsemi.com
January 2000
Revised March 2000
7
4
VC
XH162
374
Lo
w
V
o
lt
age
1
6
-Bi
t
D-T
ype Fli
p
-Fl
op w
i
t
h
Bushol
d
74VCXH162374
Low Voltage 16-Bit D-Type Flip-Flop with Bushold
and 26
Series Resistors in Outputs
General Description
The VCXH162374 contains sixteen non-inverting D-type
flip-flops with 3-STATE outputs and is intended for bus ori-
ented applications. The device is byte controlled. A buff-
ered clock (CP) and output enable (OE) are common to
each byte and can be shorted together for full 16-bit opera-
tion.
The VCXH162374 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 74VCXH162374 is also designed with 26
series
resistors in the outputs. This design reduces line noise in
applications such as memory address drivers, clock drivers
and bus transceivers/transmitters.
The 74VCXH162374 is designed for low voltage (1.65V to
3.6V) V
CC
applications with output compatibility up to 3.6V.
The 74VCXH162374 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Features
s
1.65V3.6V V
CC
supply operation
s
3.6V tolerant control inputs and outputs
s
Bushold data inputs eliminates the need for external
pull-up/pull-down resistors
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
4.8 ns max for 2.3V to 2.7V V
CC
9.6 ns max for 1.65V to 1.95V V
CC
s
Static Drive (I
OH
/I
OL
)
12 mA @ 3.0V V
CC
8 mA @ 2.3V V
CC
3
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:
Note 1: Use this Order Number to receive devices in Tape and Reel.
Logic Symbol
Pin Descriptions
Order Number
Package
Package Descriptions
Number
74VCXH162374MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TUBES]
74VCXH162374MTX
(Note 1)
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TAPE and REEL]
Pin Names
Description
OE
n
Output Enable Input (Active LOW)
CP
n
Clock Pulse Input
I
0
I
15
Bushold Inputs
O
0
O
15
Outputs
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2
74VCXH162374
Connection Diagram
Truth Tables
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 74VCXH162374 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 func-
tioning 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.
Inputs
Outputs
CP
1
OE
1
I
0
I
7
O
0
O
7
L
H
H
L
L
L
L
L
X
O
0
X
H
X
Z
Inputs
Outputs
CP
2
OE
2
I
8
I
15
O
8
O
15
L
H
H
L
L
L
L
L
X
O
0
X
H
X
Z
3
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7
4
VC
XH162
374
Absolute Maximum Ratings
(Note 2)
Recommended Operating
Conditions
(Note 4)
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 control inputs must be held HIGH or LOW.
DC Electrical Characteristics (2.7V
<
V
CC
3.6V)
Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 7: Outputs disabled or 3-STATE only.
Supply Voltage (V
CC
)
-
0.5V to
+
4.6V
DC Input Voltage (V
I
)
OE
n
, CP
n
-
0.5V to 4.6V
I
0
I
15
-
0.5V to V
CC
to 0.5V
Output Voltage (V
O
)
Outputs 3-STATED
-
0.5V to
+
4.6V
Outputs Active (Note 3)
-
0.5V to V
CC
+
0.5V
DC Input Diode Current (I
IK
)
V
I
<
0V
-
50 mA
DC Output Diode Current (I
OK
)
V
O
<
0V
-
50 mA
V
O
>
V
CC
+
50 mA
DC Output Source/Sink Current
(I
OH
/I
OL
)
50 mA
DC V
CC
or GND Current per
Supply Pin (I
CC
or GND)
100 mA
Storage Temperature Range (T
STG
)
-
65
C to
+
150
C
Power Supply
Operating
1.65V to 3.6V
Data Retention Only
1.2V to 3.6V
Input Voltage
-
0.3V to V
CC
Output Voltage (V
O
)
Output in Active States
0V to V
CC
Output in "OFF" State
0.0V to 3.6V
Output Current in I
OH
/I
OL
V
CC
=
3.0V to 3.6V
12 mA
V
CC
=
2.3V to 2.7V
8 mA
V
CC
=
1.65V to 2.3V
3 mA
Free Air Operating Temperature (T
A
)
-
40
C to
+
85
C
Minimum Input Edge Rate (
t/
V)
V
IN
=
0.8V to 2.0V, V
CC
=
3.0V
10 ns/V
Symbol
Parameter
Conditions
V
CC
(V)
Min
Max
Units
V
IH
HIGH Level Input Voltage
2.7
-
3.6
2.0
V
V
IL
LOW Level Input Voltage
2.7
-
3.6
0.8
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A 2.7
-
3.6
V
CC
-
0.2
V
I
OH
=
-
6 mA
2.7
2.2
V
I
OH
=
-
8 mA
3.0
2.4
V
I
OH
=
-
12 mA
3.0
2.2
V
V
OL
LOW Level Output Voltage
I
OL
=
100
A 2.7
-
3.6
0.2
V
I
OL
=
6 mA
2.7
0.4
V
I
OL
=
8 mA
3.0
0.55
V
I
OL
=
12 mA
3.0
0.8
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
2.7
-
3.6
5.0
A
Data Pins
V
I
=
V
CC
or GND
2.7
-
3.6
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.8V
3.0
75
A
Drive Hold Current
V
IN
=
2.0V
3.0
-
75
I
I(OD)
Bushold Input Over-Drive
(Note 5)
3.6
450
A
Current to Change State
(Note 6)
3.6
-
450
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.7
-
3.6
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.7
-
3.6
20
A
V
CC
(V
O
)
3.6V (Note 7)
2.7
-
3.6
20
A
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
2.7
-
3.6
750
A
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4
74VCXH162374
DC Electrical Characteristics (2.3V
V
CC
2.7V)
Note 8: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 9: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 10: Outputs disabled or 3-STATE only.
DC Electrical Characteristics (1.65V
V
CC
<
2.3V)
Note 11: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 12: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 13: Outputs disabled or 3-STATE only.
Symbol
Parameter
Conditions
V
CC
(V)
Min
Max
Units
V
IH
HIGH Level Input Voltage
2.3
-
2.7
1.6
V
V
IL
LOW Level Input Voltage
2.3
-
2.7
0.7
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A 2.3
-
2.7
V
CC
-
0.2
V
I
OH
=
-
4 mA
2.3
2.0
V
I
OH
=
-
6 mA
2.3
1.8
V
I
OH
=
-
8 mA
2.3
1.7
V
V
OL
LOW Level Output Voltage
I
OL
=
100
A 2.3
-
2.7
0.2
V
I
OL
=
6 mA
2.3
0.4
V
I
OL
=
8 mA
2.3
0.6
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
2.3
-
2.7
5.0
A
Data Pins
V
I
=
V
CC
or GND
2.3
-
2.7
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.7V
2.3
45
A
Drive Hold Current
V
IN
=
1.6V
2.3
-
45
I
I(OD)
Bushold Input Over-Drive
(Note 8)
2.7
300
A
Current to Change State
(Note 9)
2.7
-
300
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.3
-
2.7
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.3
-
2.7
20
A
V
CC
(V
O
)
3.6V (Note 10)
2.3
-
2.7
20
A
Symbol
Parameter
Conditions
V
CC
(V)
Min
Max
Units
V
IH
HIGH Level Input Voltage
1.65 - 2.3
0.65
V
CC
V
V
IL
LOW Level Input Voltage
1.65 - 2.3
0.35
V
CC
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
1.65 - 2.3
V
CC
-
0.2
V
I
OH
=
-
3 mA
1.65
1.25
V
V
OL
LOW Level Output Voltage
I
OL
=
100
A
1.65 - 2.3
0.2
V
I
OL
=
3 mA
1.65
0.3
V
I
I
Input Leakage Current
Control Pins
0
V
I
3.6V
1.65 - 2.3
5.0
A
Data Pins
V
I
=
V
CC
or GND
1.65 - 2.3
5.0
A
I
I(HOLD)
Bushold Input Minimum
V
IN
=
0.57V
1.65
25
A
Drive Hold Current
V
IN
=
1.07V
1.65
-
25
I
I(OD)
Bushold Input Over-Drive
(Note 11)
1.95
200
A
Current to Change State
(Note 12)
1.95
-
200
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
1.65 - 2.3
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power-OFF Leakage Current
0
(V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
1.65 - 2.3
20
A
V
CC
(V
O
)
3.6V (Note 13)
1.65 - 2.3
20
A
5
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7
4
VC
XH162
374
AC Electrical Characteristics
(Note 14)
Note 14: For C
L
=
50
P
F, add approximately 300 ps to the AC maximum specification.
Note 15: 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
Capacitance
Symbol
Parameter
T
A
=
-
40
C to
+
85
C, C
L
=
30 pF, R
L
=
500
Units
V
CC
=
3.3V
0.3V
V
CC
=
2.5V
0.2V
V
CC
=
1.8V
0.15V
Min
Max
Min
Max
Min
Max
f
MAX
Maximum Clock Frequency
250
200
100
MHz
t
PHL
, t
PLH
Prop Delay CP to O
n
0.8
3.4
1.0
4.8
1.5
9.6
ns
t
PZL
, t
PZH
Output Enable Time
0.8
3.9
1.0
5.4
1.5
9.8
ns
t
PLZ
, t
PHZ
Output Disable Time
0.8
4.0
1.0
4.4
1.5
7.9
ns
t
S
Setup Time
1.5
1.5
2.5
ns
t
H
Hold Time
1.0
1.0
1.0
ns
t
W
Pulse Width
1.5
1.5
4.0
ns
t
OSHL
Output to Output Skew
(Note 15)
0.5
0.5
0.75
ns
t
OSLH
Symbol
Parameter
Conditions
V
CC
(V)
T
A
=
+
25
C
Units
Typical
V
OLP
Quiet Output Dynamic Peak V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
0.15
V
2.5
0.25
3.3
0.35
V
OLV
Quiet Output Dynamic Valley V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
-
0.15
V
2.5
-
0.25
3.3
-
0.35
V
OHV
Quiet Output Dynamic Valley V
OH
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
1.55
V
2.5
2.05
3.3
2.65
Symbol
Parameter
Conditions
T
A
=
+
25
C
Units
Typical
C
IN
Input Capacitance
V
CC
=
1.8V, 2.5V or 3.3V, V
I
=
0V or V
CC
6
pF
C
OUT
Output Capacitance
V
I
=
0V or V
CC
, V
CC
=
1.8V, 2.5V or 3.3V
7
pF
C
PD
Power Dissipation Capacitance
V
I
=
0V or V
CC
, f
=
10 MHz,
20
pF
V
CC
=
1.8V, 2.5V or 3.3V
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