2000 Fairchild Semiconductor Corporation
DS500192
www.fairchildsemi.com
February 1999
Revised July 2000
7
4
VC
X16
722
Lo
w
V
o
lt
age
2
2
-Bi
t
Regist
er wit
h
3.
6V T
o
l
e
ra
nt Input
s and
Out
puts
74VCX16722
Low Voltage 22-Bit Register
with 3.6V Tolerant Inputs and Outputs
General Description
The VCX16722 low voltage 22-bit register contains twenty-
two non-inverting D-type flip-flops with 3-STATE outputs
and is intended for bus oriented applications. The design
has been optimized for use with JEDEC compliant 200 pin
DIMM modules.
The 74VCX16722 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O capability up to 3.6V.
The 74VCX16722 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
specifications provided
s
3.6V tolerant inputs and outputs
s
t
PD
(CLK to O
n
)
3.6ns max for 3.0V to 3.6V V
CC
4.6ns max for 2.3V to 2.7V V
CC
9.2ns max for 1.65V to 1.95V V
CC
s
Power-down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
Meets JEDEC registered module specifications
s
Static Drive (I
OH
/I
OL
)
24mA @ 3.0V
18mA @ 2.3V
6mA @
1.65V
s
Latchup 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:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Order Number
Package Number
Package Description
74VCX16722MTD
MTD64
64-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
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2
74VCX16722
Connection Diagram
Pin Descriptions
Truth Table
H
=
HIGH Voltage Level
L
=
LOW Level Voltage
X
=
Immaterial (HIGH or LOW, Inputs may not float)
Z
=
High Impedance
O
0
=
Previous O
0
before LOW-to-HIGH transition of Clock
=
LOW-to-HIGH transition
Functional Description
The VCX16722 contains twenty-two D-type flip-flops with
3-STATE standard outputs. The twenty-two flip-flops will
store the state of their individual D-type inputs that meet
the setup and hold time requirements on the LOW-HIGH
Clock (CLK) transition, when the Clock-Enable (CE) is
LOW. The 3-STATE standard outputs are controlled by the
Output-Enable (OE). When OE is HIGH, the standard out-
puts are in high impedance mode but this does not inter-
fere with entering new data into the flip-flops.
Logic Diagram
Pin Names
Description
OE
Output Enable Input (Active LOW)
CE
Clock Enable Input (Active Low)
CLK
Clock Input
D
1
- D
21
Data Inputs
O
1
- O
21
3-STATE Outputs
CLK
CE
OE
D
0
-D
21
O
0
-O
21
X
X
H
X
Z
X
H
L
X
O
0
L
L
L
L
L
L
H
H
L or H
L
L
X
O
0
3
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7
4
VC
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722
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 tables will define the condi-
tions for actual device operation.
Note 3: I
O
Absolute Maximum Rating must be observed.
Note 4: Floating or unused pin (inputs or I/O's) must be held HIGH or LOW.
DC Electrical Characteristics (2.7V
<
V
CC
3.6V)
Note 5: Outputs disabled or 3-STATE only.
Supply Voltage (V
CC
)
-
0.5V to
+
4.6V
DC Input Voltage (V
I
)
-
0.5V to
+
4.6V
Output Voltage (V
O
)
Outputs 3-STATE
-
0.5V to
+
4.6V
Outputs Active (Note 3)
-
0.5 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 Ground Current per
Supply Pin (I
CC
or Ground)
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 3.6V
Output Voltage (V
O
)
Output in Active States
0V to V
CC
Output in 3-STATE
0.0V to 3.6V
Output Current in I
OH
/I
OL
V
CC
=
3.0V to 3.6V
24 mA
V
CC
=
2.3V to 2.7V
18 mA
V
CC
=
1.65V to 2.3V
6 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
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
2.73.6
2.0
V
V
IL
LOW Level Input Voltage
2.73.6
0.8
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.73.6
V
CC
-
0.2
I
OH
=
-
12 mA
2.7
2.2
V
I
OH
=
-
18 mA
3.0
2.4
I
OH
=
-
24 mA
3.0
2.2
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.73.6
0.2
I
OL
=
12 mA
2.7
0.4
V
I
OL
=
18 mA
3.0
0.4
I
OL
=
24 mA
3.0
0.55
I
I
Input Leakage Current
0V
V
I
3.6V
2.73.6
5.0
A
I
OZ
3-STATE Output Leakage
0V
V
O
3.6V
2.73.6
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power Off Leakage Current
0V
(V
I
, V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.73.6
20
A
V
CC
(V
I
, V
O
)
3.6V (Note 5)
2.73.6
20
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
2.73.6
750
A
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4
74VCX16722
DC Electrical Characteristics (2.3V
V
CC
2.7V)
Note 6: Outputs disabled or 3-STATE only.
DC Electrical Characteristics (1.65V
V
CC
<
2.3V)
Note 7: Outputs disabled or 3-STATE only.
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
V
IH
HIGH Level Input Voltage
2.32.7
1.6
V
V
IL
LOW Level Input Voltage
2.32.7
0.7
V
V
OH
HIGH Level Output Voltage
I
OH
=
-
100
A
2.32.7
V
CC
-
0.2
V
I
OH
=
-
6 mA
2.3
2.0
I
OH
=
-
12 mA
2.3
1.8
I
OH
=
-
18 mA
2.3
1.7
V
OL
LOW Level Output Voltage
I
OL
=
100
A
2.32.7
0.2
I
OL
=
12mA
2.3
0.4
V
I
OL
=
18 mA
2.3
0.6
I
I
Input Leakage Current
0
V
I
3.6V
2.32.7
5.0
A
I
OZ
3-STATE Output Leakage
0
V
O
3.6V
2.32.7
10
A
V
I
=
V
IH
or V
IL
I
OFF
Power Off Leakage Current
0
(V
I
, V
O
)
3.6V
0
10
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.32.7
20
A
V
CC
(V
I
, V
O
)
3.6V (Note 6)
2.32.7
20
Symbol
Parameter
Conditions
V
CC
Min
Max
Units
(V)
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
=
-
6 mA
1.65
1.25
V
OL
LOW Level Output Voltage
I
OL
=
100
A
1.65 - 2.3
0.2
V
I
OL
=
6mA
1.65
0.3
I
I
Input Leakage Current
0
V
I
3.6V
1.65 - 2.3
5.0
A
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
I
, 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
I
, V
O
)
3.6V (Note 7)
1.65 - 2.3
20
5
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7
4
VC
X16
722
AC Electrical Characteristics
(Note 8)
Note 8: For C
L
=
50 pF, add approximately 300 ps to the AC maximum specification.
Note 9: 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
).
AC Electrical Characteristics Over Load
(Note 10)
Note 10: This parameter is guaranteed by characterization but not tested.
Dynamic Switching Characteristics
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
=
2.5
0.2V
V
CC
=
1.8
0.15V
Min
Max
Min
Max
Min
Max
f
MAX
Maximum Clock Frequency
250
200
100
MHz
t
PHL
, t
PLH
Propagation Delay Clock to Bus
1.3
3.6
1.5
4.6
2.0
9.2
ns
t
PZL
, t
PZH
Output Enable Time
0.6
3.5
0.8
4.5
1.5
9.0
ns
t
PLZ
, t
PHZ
Output Disable Time
0.6
3.2
0.8
4.2
1.5
7.6
ns
t
S
Setup Time
2.0
2.0
3.0
ns
t
H
Hold Time
0.0
0.0
0.5
ns
t
W
Pulse Width
1.5
1.5
4.0
ns
t
OSHL
Output to Output Skew
0.5
0.5
0.75
ns
t
OSLH
(Note 9)
Symbol
Parameter
T
A
=
-
0
C to
+
70
C, R
L
=
500
V
CC
=
3.3V
0.3V
Units
C
L
=
0 pF
C
L
=
50 pF
Min
Max
Min
Max
t
PHL
, t
PLH
Prop Delay Clock to Bus
1.1
2.5
1.9
3.9
ns
t
PZL
, t
PZH
Output Enable Time
0.7
2.4
1.0
3.8
ns
t
PLZ
, t
PHZ
Output Disable Time
0.7
2.1
1.0
3.5
ns
t
S
Setup Time
2.0
2.0
ns
t
H
Hold Time
0.0
0.0
ns
t
W
Pulse Width
1.5
1.5
ns
Symbol
Parameter
Conditions
V
CC
T
A
=
+
25
C
Units
(V)
Typical
V
OLP
Quiet Output Dynamic Peak V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
0.25
2.5
0.6
V
3.3
0.8
V
OLV
Quiet Output Dynamic Valley V
OL
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
-
0.25
2.5
-
0.6
V
3.3
-
0.8
V
OHV
Quiet Output Dynamic Valley V
OH
C
L
=
30 pF, V
IH
=
V
CC
, V
IL
=
0V
1.8
1.5
2.5
1.9
V
3.3
2.2
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