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74VCX16722 Low Voltage 22-Bit Register with 3.6V Tolerant Inputs and Outputs
February 1999
Revised January 2005
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
1.65V–3.6V V
CC
supply operation
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:
Order Number
74VCX16722MTD
Package Number
MTD64
Package Description
64-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
© 2005 Fairchild Semiconductor Corporation
DS500192
www.fairchildsemi.com
74VCX16722
Connection Diagram
Pin Descriptions
Pin Names
OE
CE
CLK
D
0
- D
21
O
0
- O
21
Description
Output Enable Input (Active LOW)
Clock Enable Input (Active Low)
Clock Input
Data Inputs
3-STATE Outputs
Truth Table
CLK
X
X
CE
X
H
L
L
L
OE
H
L
L
L
L
D
n
X
X
L
H
X
O
n
Z
O
n
L
H
O
n
↑
↑
L or H
H
=
Logic HIGH
L
=
Logic LOW
X
=
Don’t Care, but not floating
Z
=
High Impedance
O
n
=
Previous O
n
before LOW-to-HIGH Clock Transition
↑ =
LOW-to-HIGH Clock 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
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2
74VCX16722
Absolute Maximum Ratings
(Note 2)
Supply Voltage (V
CC
)
DC Input Voltage (V
I
)
Output Voltage (V
O
)
Outputs 3-STATE
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 Ground Current per
Supply Pin (I
CC
or Ground)
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
±
50 mA
±
100 mA
−
65
°
C to
+
150
°
C
Recommended Operating
Conditions
(Note 4)
Power Supply
Operating
Data Retention Only
Input Voltage
Output Voltage (V
O
)
Output in Active States
Output in 3-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 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.
1.65V to 3.6V
1.2V to 3.6V
−
0.3V to 3.6V
0V to V
CC
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
OZ
I
OFF
I
CC
∆I
CC
Input Leakage Current
3-STATE Output Leakage
Power Off Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
0V
≤
V
I
≤
3.6V
0V
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0V
≤
(V
I
, V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
I
, V
O
)
≤
3.6V (Note 5)
V
IH
=
V
CC
−
0.6V
Note 5:
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
0
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
±10
10
20
±20
750
V
V
V
µA
µA
µA
µA
µA
3
www.fairchildsemi.com
74VCX16722
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
=
12mA
I
OL
=
18 mA
I
I
I
OZ
I
OFF
I
CC
Input Leakage Current
3-STATE Output Leakage
Power Off Leakage Current
Quiescent Supply Current
0
≤
V
I
≤
3.6V
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
I
, V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
I
, V
O
)
≤
3.6V (Note 6)
Note 6:
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
0
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
±10
10
20
±20
V
V
V
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
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
3-STATE Output Leakage
Power Off Leakage Current
Quiescent Supply Current
I
OH
= −100 µA
I
OH
= −6
mA
I
OL
=
100
µA
I
OL
=
6mA
0
≤
V
I
≤
3.6V
0
≤
V
O
≤
3.6V
V
I
=
V
IH
or V
IL
0
≤
(V
I
, V
O
)
≤
3.6V
V
I
=
V
CC
or GND
V
CC
≤
(V
I
, V
O
)
≤
3.6V (Note 7)
Note 7:
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
0
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
±10
10
20
±20
V
V
V
µA
µA
µA
µA
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4
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