Revised June 2005
74VCXH162244
Low Voltage 16-Bit Buffer/Line Driver with Bushold
and 26: Series Resistor in Outputs
General Description
Features
The VCXH162244 contains sixteen non-inverting buffers
with 3-STATE outputs to be employed as a memory and
address driver, clock driver, or bus oriented transmitter/
receiver. The device is nibble (4-bit) controlled. Each nibble
has separate 3-STATE control inputs which can be shorted
together for full 16-bit operation.
The VCXH162244 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to
hold unused or floating data inputs at a valid logic level
■ 1.4V to 3.6V VCC supply operation
The 74VCXH162244 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 74VCXH162244 is designed for low voltage (1.4V to
3.6V) VCC applications with output capability up to 3.6V.
The 74VCXH162244 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintaining low CMOS power dissipation.
■ 3.6V tolerant control inputs and outputs
■ Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
■ 26: series resistors in outputs
■ tPD
3.3 ns max for 3.0V to 3.6V VCC
■ Static Drive (IOH/IOL)
r12 mA @ 3.0V VCC
■ Uses patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 300 mA
■ ESD performance:
Human body model ! 2000V
Machine model ! 200V
Ordering Code:
Order Number
74VCXH162244MTD
74VCXH162244MTX
(Note 1)
Package
Package Description
Number
MTD48
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TUBES]
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TAPE and REEL]
Note 1: Use this Order Number to receive devices in Tape and Reel.
Logic Symbol
Pin Descriptions
Pin Names
© 2005 Fairchild Semiconductor Corporation
DS500231
Description
OEn
Output Enable Input (Active LOW)
I0–I15
Bushold Inputs
O0–O15
Outputs
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74VCXH162244 Low Voltage 16-Bit Buffer/Line Driver with Bushold
January 2000
74VCXH162244
Connection Diagram
Truth Tables
Inputs
Outputs
OE1
I0–I3
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
I4–I7
OE2
O0–O3
O4–O7
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
I8–I11
OE3
O8–O11
L
L
L
L
H
H
H
X
Z
I12–I15
O12–O15
Inputs
OE4
Outputs
L
L
L
L
H
H
H
X
Z
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial (HIGH or LOW, inputs may not float)
Z High Impedance
Functional Description
The 74VCXH162244 contains sixteen non-inverting buffers with 3-STATE outputs. The device is nibble (4 bits) controlled
with each nibble functioning identically, but independent of each other. The control pins may be shorted together to obtain
full 16-bit operation.The 3-STATE outputs are controlled by an Output Enable (OEn) input. When OEn is LOW, the outputs
are in the 2-state mode. When OEn is HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the inputs.
Logic Diagram
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2
Recommended Operating
Conditions (Note 4)
0.5V to 4.6V
Supply Voltage (VCC )
DC Input Voltage (VI)
Power Supply
0.5V to 4.6V
0.5V to VCC 0.5V
OEn
I0 – I15
Output Voltage (VO)
Operating
1.4V to 3.6V
Data Retention Only
1.2V to 3.6V
0.3V to VCC
Input Voltage
Outputs 3-STATE
Outputs Active (Note 3)
0.5V to 4.6V
0.5V to VCC 0.5V
Output Voltage (VO)
Output in Active States
DC Input Diode Current (IIK)
VI 0V
50 mA
VO 0V
50 mA
50 mA
VO ! VCC
DC Output Source/Sink Current
r50 mA
(IOH/IOL)
VCC
3.0V to 3.6V
VCC
2.3V to 2.7V
VCC
1.65V to 2.3V
VCC
1.4V to 1.6V
Free Air Operating Temperature (TA)
r12 mA
r8 mA
r3 mA
r2 mA
40qC to 85qC
Minimum Input Edge Rate ('t/'V)
DC VCC or GND Current per
Storage Temperature Range (TSTG)
0.0V to 3.6V
Output Current in IOH/IOL
DC Output Diode Current (IOK)
Supply Pin (ICC or GND)
0V to VCC
Output in 3-STATE
r100 mA
65qC to 150qC
VIN
0.8V to 2.0V, VCC
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 Ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.
Note 3: IO Absolute Maximum Rating must be observed.
Note 4: Floating or unused control inputs must be held HIGH or LOW.
DC Electrical Characteristics
Symbol
Parameter
Conditions
VCC
Min
Max
Units
(V)
VIH
VIL
HIGH Level Input Voltage
2.7 - 3.6
LOW Level Input Voltage
2.0
2.3 - 2.7
1.6
1.65 - 2.3
0.65 u VCC
1.4 - 1.6
0.65 u VCC
2.7 - 3.6
0.8
2.3 - 2.7
0.7
1.65 - 2.3
0.35 u V CC
HIGH Level Output Voltage
IOH
100 PA
IOH
IOH
2.7 - 3.6
VCC - 0.2
6 mA
2.7
2.2
8 mA
3.0
2.4
IOH
12 mA
3.0
2.2
IOH
100 PA
2.3 - 2.7
VCC - 0.2
IOH
4 mA
2.3
2.0
IOH
6 mA
2.3
1.8
IOH
8 mA
IOH
100 PA
IOH
3 mA
IOH
100 PA
IOH
1 mA
3
V
0.35 u V CC
1.4 - 1.6
VOH
V
2.3
1.7
1.65 - 2.3
VCC - 0.2
1.65
1.25
1.4 - 1.6
VCC - 0.2
1.4
1.05
V
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74VCXH162244
Absolute Maximum Ratings(Note 2)
74VCXH162244
DC Electrical Characteristics
Symbol
(Continued)
Parameter
Conditions
VCC
Min
Max
Units
(V)
VOL
II
II(HOLD)
II(OD)
IOZ
LOW Level Output Voltage
Input Leakage Current
IOL
100 PA
IOL
6 mA
IOL
IOL
2.7 - 3.6
0.2
2.7
0.4
8 mA
3.0
0.55
12 mA
3.0
0.8
IOL
100 PA
2.3 - 2.7
0.2
IOL
6 mA
2.3
0.4
IOL
8 mA
2.3
0.6
IOL
100 PA
IOL
3 mA
IOL
100 PA
IOL
1 mA
Control Pins
0 d VI d 3.6V
Data Pins
VI
VCC or GND
0.2
1.65
0.3
1.4 - 1.6
0.2
1.4
0.35
1.4 - 3.6
r5.0
1.4 - 3.6
r5.0
Bushold Input Minimum
VIN
0.8V
3.0
75
Drive Hold Current
VIN
2.0V
3.0
75
VIN
0.7V
2.3
45
VIN
1.6V
2.3
45
VIN
0.57V
1.65
25
VIN
1.07V
1.65
25
Bushold Input Over-Drive
(Note 5)
3.6
450
Current to Change State
(Note 6)
3.6
450
(Note 5)
2.7
300
(Note 6)
2.7
300
(Note 5)
1.95
200
(Note 6)
1.95
200
3-STATE Output Leakage
0 d VO d 3.6V
VI
VIH or VIL
IOFF
Power-OFF Leakage Current
0 d (VO) d 3.6V
ICC
Quiescent Supply Current
VI
VCC or GND
VCC d (VO) d 3.6V (Note 7)
'ICC
1.65 - 2.3
Increase in ICC per Input
VIH
VCC 0.6V
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.
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4
2.7 - 3.6
V
PA
PA
PA
r10.0
PA
0
10.0
PA
2.7 - 3.6
20.0
PA
2.7 - 3.6
r20.0
PA
2.7 - 3.6
750
PA
Symbol
tPHL
Parameter
Propagation Delay
VCC
Conditions
CL
30 pF, RL
Output Enable Time
Max
3.3 r 0.3
0.8
3.3
2.5 r 0.2
1.0
3.8
1.8 r 0.15
1.5
7.6
500:
30 pF, RL
500:
1.5 r 0.1
1.0
15.2
CL
30 pF, RL
500:
3.3 r 0.3
0.8
3.8
2.5 r 0.2
1.0
5.1
Output Disable Time
1.8 r 0.15
1.5
9.8
CL
30 pF, RL
500:
1.5 r 0.1
1.0
19.6
CL
30 pF, RL
500:
3.3 r 0.3
0.8
3.6
2.5 r 0.2
1.0
4.0
tPHZ
tOSHL
Output-to-Output Skew
tOSLH
(Note 9)
CL
CL
Note 8: For CL
30 pF, RL
30 pF, RL
1.5
7.2
1.5 r 0.1
1.0
14.4
0.5
2.5 r 0.2
0.5
1.8 r 0.15
0.75
1.5 r 0.1
1.5
500:
Figures
1, 2
Figures
1, 3, 4
Figures
5, 7, 8
ns
3.3 r 0.3
Figure
Number
Figures
5, 6
ns
1.8 r 0.15
500:
Units
ns
CL
tPZH
tPLZ
40qC to 85qC
Min
tPLH
tPZL
TA
(V)
Figures
1, 3, 4
Figures
5, 7, 8
ns
50PF, 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 (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol
VOLP
VOLV
VOHV
Parameter
Quiet Output Dynamic Peak VOL
Quiet Output Dynamic Valley VOL
Quiet Output Dynamic Valley VOH
Conditions
CL
CL
CL
30 pF, VIH
30 pF, VIH
30 pF, VIH
VCC, VIL
VCC, VIL
VCC, VIL
0V
0V
0V
VCC
TA 25qC
(V)
Typical
1.8
0.15
2.5
0.25
3.3
0.35
1.8
0.15
2.5
0.25
3.3
0.35
1.8
1.55
2.5
2.05
3.3
2.65
Units
V
V
V
Capacitance
Symbol
Parameter
TA 25qC
Conditions
Units
Typical
CIN
Input Capacitance
VCC
COUT
Output Capacitance
VI
0V or VCC, VCC
1.8, 2.5V or 3.3V, VI
CPD
Power Dissipation Capacitance
VI
0V or VCC, f
5
0V or VCC
1.8V, 2.5V or 3.3V
10 MHz, VCC
1.8V, 2.5V or 3.3V
6.0
pF
7.0
pF
20.0
pF
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74VCXH162244
AC Electrical Characteristics (Note 8)
74VCXH162244
AC Loading and Waveforms (VCC 3.3V r 0.3V to 1.8V r 0.15V)
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V at VCC 3.3 r 0.3V;
VCC x 2 at VCC 2.5 r 0.2V; 1.8 r 0.15V
tPZH, tPHZ
GND
FIGURE 1. AC Test Circuit
FIGURE 2. Waveform for Inverting and Non-Inverting Functions
FIGURE 3. 3-STATE Output High Enable and Disable Times for Low Voltage Logic
FIGURE 4. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic
Symbol
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VCC
3.3V r 0.3V
2.5V r 0.2V
1.8V r 0.15V
Vmi
1.5V
VCC/2
VCC/2
Vmo
1.5V
VCC/2
VCC/2
VX
VOL 0.3V
VOL 0.15V
VOL 0.15V
VY
VOH 0.3V
VOH 0.15V
VOH 0.15V
6
74VCXH162244
AC Loading and Waveforms (VCC 1.5V r 0.1V)
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
VCC x 2 at VCC
tPZH, tPHZ
1.5V r 0.1V
GND
FIGURE 5. AC Test Circuit
FIGURE 6. Waveform for Inverting and Non-Inverting Functions
FIGURE 7. 3-STATE Output High Enable and Disable Times for Low Voltage Logic
FIGURE 8. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic
VCC
Symbol
1.5V r 0.1V
VCC/2
Vmi
Vmo
VCC/2
VX
VOL 0.1V
VY
VOH 0.1V
7
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74VCXH162244 Low Voltage 16-Bit Buffer/Line Driver with Bushold
Physical Dimensions inches (millimeters) unless otherwise noted
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Package Number MTD48
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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