Revised June 2005
74VCX162245
Low Voltage 16-Bit Bidirectional Transceiver
with 3.6V Tolerant Inputs and Outputs
and 26: Series Resistors in A Port Outputs
General Description
Features
The VCX162245 contains sixteen non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is byte controlled. Each
byte has separate 3-STATE control inputs which can be
shorted together for full 16-bit operation. The T/R inputs
determine the direction of data flow through the device.
The OE inputs disable both the A and B ports by placing
them in a high impedance state.
The 74VCX162245 is designed for low voltage (1.4V to
3.6V) VCC applications with I/O compatibility up to 3.6V.
The 74VCX162245 is also designed with 26: series resistance in the A Port outputs. This design reduces line noise
in applications such as memory address drivers, clock drivers, and bus transceivers/transmitters.
■ 1.4V to 3.6V VCC supply operation
The 74VCX162245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintaining low CMOS power dissipation.
■ ESD performance:
■ 3.6V tolerant inputs and outputs
■ 26: series resistors in A port outputs
■ tPD (B to A)
3.4 ns max for 3.0V to 3.6V VCC
■ Power-down high impedance inputs and outputs
■ Supports live insertion/withdrawal (Note 1)
■ Static Drive (IOH/IOL A outputs)
r12 mA @ 3.0V VCC
■ Uses patented noise/EMI reduction circuitry
■ Latchup performance exceeds 300 mA
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 VCC 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
Package Number
Package Description
74VCX162245MTD
MTD48
48-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.
Logic Symbol
Pin Descriptions
Pin
Description
Names
© 2005 Fairchild Semiconductor Corporation
DS500048
OEn
Output Enable Input
T/Rn
Transmit/Receive Input
A0–A15
Side A Inputs or 3-STATE Outputs
B0–B15
Side B Inputs or 3-STATE Outputs
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74VCX162245 Low Voltage 16-Bit Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26: Series
Resistors in A Port Outputs
October 1996
74VCX162245
Connection Diagram
Truth Tables
Inputs
Outputs
T/R1
OE1
L
L
Bus B0–B7 Data to Bus A0–A7
L
H
Bus A0–A7 Data to Bus B0–B7
H
X
HIGH Z State on A0–A7, B0–B7
Inputs
OE2
Outputs
T/R2
L
L
Bus B8–B15 Data to Bus A8–A15
L
H
Bus A8–A15 Data to Bus B8–B15
H
X
HIGH Z State on A8–A15, B8–B15
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial (HIGH or LOW, inputs and I/O’s may not float)
Z High Impedance
Logic Diagram
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2
Recommended Operating
Conditions (Note 4)
0.5V to 4.6V
0.5V to 4.6V
Supply Voltage (VCC)
DC Input Voltage (VI)
Power Supply
Output Voltage (VO)
Outputs 3-State
Outputs Active (Note 3)
DC Input Diode Current (IIK) VI 0V
0.5V to 4.6V
0.5 to VCC 0.5V
50 mA
1.2V to 3.6V
0.3V to 3.6V
Input Voltage
Output in Active States
VO 0V
50 mA
50 mA
VO ! VCC
0.0V to 3.6V
Output Current in IOH/IOL-A Outputs
r50 mA
(IOH/IOL)
0V to VCC
Output in 3-STATE
DC Output Source/Sink Current
DC VCC or Ground Current per
Storage Temperature Range (TSTG)
1.4V to 3.6V
Data Retention Only
Output Voltage (VO)
DC Output Diode Current (IOK)
Supply Pin (ICC or Ground)
Operating
r100 mA
65qC to 150qC
VCC
3.0V to 3.6V
VCC
2.3V to 2.7V
VCC
1.65V to 1.95V
r12 mA
r8 mA
r3 mA
Output Current in r IOH/IOL-B Outputs
VCC
3.0V to 3.6V
VCC
2.3V to 2.7V
VCC
1.65V to 2.3V
Free Air Operating Temperature (TA)
r 24mA
r 18mA
r6mA
40qC to 85qC
Minimum Input Edge Rate ('t/'V)
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 tables will define the conditions for actual device operation.
Note 3: IO Absolute Maximum Rating must be observed.
Note 4: Floating or unused pins (inputs or I/O's) must be held HIGH or
LOW.
DC Electrical Characteristics
Symbol
VIH
VIL
Parameter
Conditions
HIGH Level Input Voltage
VCC
(V)
2.7 - 3.6
LOW Level Input Voltage
Min
HIGH Level Output Voltage
1.6
1.65 - 2.3
0.65 x VCC
1.4 - 1.6
0.65 x VCC
2.7 - 3.6
A Outputs
IOH
100 PA
0.8
0.7
1.65 - 2.3
0.35 x VCC
VCC - 0.2
2.2
6 mA
2.7
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
3 mA
100 PA
IOH
1 mA
3
V
0.35 x VCC
2.7 - 3.6
IOH
IOH
V
2.3 - 2.7
IOH
IOH
Units
2.0
2.3 - 2.7
1.4 - 1.6
VOH
Max
2.3
1.7
1.65 - 2.3
VCC - 0.2
.65
1.4
1.4 - 1.6
VCC - 0.2
1.4
1.05
V
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74VCX162245
Absolute Maximum Ratings(Note 2)
74VCX162245
DC Electrical Characteristics
Symbol
(Continued)
Parameter
Conditions
VCC
Min
Max
Units
(V)
VOH
VOL
VOL
HIGH Level Output Voltage
IOH
100 PA
2.7 - 3.6
VCC - 0.2
B Outputs
IOH
12 mA
2.7
2.2
IOH
18 mA
3.0
2.4
IOH
24 mA
3.0
2.2
IOH
100 PA
2.7 - 3.6
VCC - 0.2
IOH
6 mA
2.3
2.0
IOH
12 mA
2.3
1.8
IOH
18 mA
2.3
1.7
IOH
100 PA
1.65 - 2.3
VCC - 0.2
IOH
6 mA
IOH
100 PA
1.65
1.25
1.4 - 1.6
VCC - 0.2
1.05
V
IOH
2 mA
1.4
LOW Level Output Voltage
IOL
100 PA
2.7 - 3.6
A Outputs
IOL
6 mA
2.7
0.4
IOL
8 mA
3.0
0.55
IOL
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
1.65 - 2.3
0.2
IOL
3 mA
IOL
100 PA
0.2
1.65
0.3
1.4 - 1.6
0.2
1.4
0.35
IOL
2 mA
LOW Level Output Voltage
IOL
100 PA
2.7 - 3.6
0.2
B Outputs
IOL
12 mA
2.7
0.4
IOL
18 mA
3.0
0.4
IOL
24 mA
3.0
0.55
IOL
100 PA
2.3 - 2.7
0.2
IOL
12 mA
2.3
0.4
IOL
18 mA
2.3
0.6
IOL
100 PA
1.65 - 2.3
0.2
IOL
6 mA
IOL
100 PA
IOL
2 mA
1.65
0.3
1.4 - 1.6
0.2
V
V
1.4
0.35
II
Input Leakage Current
0V d VI d 3.6V
2.7 - 3.6
r5.0
PA
IOZ
3-STATE Output Leakage
0V d VO d 3.6V
2.7 - 3.6
r10
PA
PA
VI
VIH or VIL
IOFF
Power Off Leakage Current
0V d (VI, VO) d 3.6V
ICC
Quiescent Supply Current
VI
'ICC
Increase in ICC per Input
VIH
VCC or GND
VCC d (VI, VO) d 3.6V (Note 5)
VCC 0.6V
Note 5: Outputs disabled or 3-STATE only.
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4
0
10
2.7 - 3.6
20
2.7 - 3.6
r20
2.7 - 3.6
750
PA
PA
Symbol
Parameter
tPHL,
Propagation Delay
tPLH
B to A
tPZL,
Output Enable Time
tPZH
B to A
tPLZ,
Output Disable Time
tPHZ
B to A
tPHL,
Propagation Delay
tPLH
A to B
tPZL,
Output Enable Time
tPZH
A to B
tPLZ,
Output Disable Time
tPHZ
A to B
tOSHL,
Output-to-Output Skew
tOSLH
(Note 7)
VCC
Conditions
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
15 pF, RL
2k:
CL
30 pF, RL
500:
CL
Note 6: For CL
(Note 6)
15 pF, RL
40qC to 85qC
Min
Max
3.4
3.3 r 0.3
0.8
2.5 r 0.2
1.0
4.3
1.8 r 0.15
1.5
8.6
1.5 r 0.1
1.0
17.2
3.3 r 0.3
0.8
4.2
2.5 r 0.2
1.0
5.7
1.8 r 0.15
1.5
9.8
1.5 r 0.1
1.0
19.6
3.3 r 0.3
0.8
4.1
2.5 r 0.2
1.0
4.8
1.8 r 0.15
1.5
8.6
1.5 r 0.1
1.0
17.2
2.5
3.3 r 0.3
0.8
2.5 r 0.2
1.0
3.0
1.8 r 0.15
1.5
6.0
1.5 r 0.1
1.0
12.0
3.5
3.3 r 0.3
0.8
2.5 r 0.2
1.0
4.1
1.8 r 0.15
1.5
8.2
1.5 r 0.1
1.0
16.4
3.3 r 0.3
0.8
3.5
2.5 r 0.2
1.0
3.8
1.8 r 0.15
1.5
6.8
1.5 r 0.1
1.0
13.6
3.3 r 0.3
2k:
TA
(V)
Units
ns
Figure
Number
Figures
1, 2
Figures
5, 6
ns
Figures
1, 3, 4
Figures
5, 7, 8
ns
Figures
1, 3, 4
Figures
5, 7, 8
ns
Figures
1, 2
Figures
5, 6
ns
Figures
1, 3, 4
Figures
5, 7, 8
ns
Figures
1, 3, 4
Figures
5, 7, 8
0.5
2.5 r 0.2
0.5
1.8 r 0.15
0.75
1.5 r 0.1
1.5
ns
50pF, add approximately 300ps to the AC maximum specification.
Note 7: 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).
5
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74VCX162245
AC Electrical Characteristics
74VCX162245
Dynamic Switching Characteristics
Symbol
VOLP
Parameter
Quiet Output Dynamic
VCC
Conditions
CL
30 pF, VIH
VCC, VIL
0V
Peak VOL, A to B
VOLP
Quiet Output Dynamic
CL
30 pF, VIH
VCC, VIL
0V
Peak VOL, B to A
VOLV
Quiet Output Dynamic
CL
30 pF, VIH
VCC, VIL
0V
Valley VOL, A to B
VOLV
Quiet Output Dynamic
CL
30 pF, VIH
VCC, VIL
0V
Valley VOL, B to A
VOHV
Quiet Output Dynamic
CL
30 pF, VIH
VCC, VIL
0V
Valley VOH, A to B
VOHV
Quiet Output Dynamic
CL
30 pF, VIH
VCC, VIL
0V
Valley VOH, B to A
25qC
TA
(V)
Typical
1.8
0.25
2.5
0.6
3.3
0.8
1.8
0.15
2.5
0.25
3.3
0.35
1.8
0.25
2.5
0.6
3.3
0.8
1.8
0.15
2.5
0.25
3.3
0.35
1.8
1.5
2.5
1.9
3.3
2.2
1.8
1.55
2.5
2.05
3.3
2.65
Units
V
V
V
V
V
V
Capacitance
Symbol
Parameter
Conditions
CIN
Input Capacitance
VCC
1.8V, 2.5V, or 3.3V, VI
CI/O
Output Capacitance
VI
0V, or VCC, VCC
CPD
Power Dissipation Capacitance
VI
0V or VCC, f
VCC
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25qC
Units
6
pF
1.8V, 2.5V or 3.3V
7
pF
20
pF
10 MHz
1.8V, 2.5V or 3.3V
6
TA
0V or VCC
74VCX162245
AC Loading and Waveforms (VCC 3.3V r 0.3V to 1.8V r 0.15V)
FIGURE 1. AC Test Circuit
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; 1.8V r 0.15V
tPZH, tPHZ
GND
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
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
7
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74VCX162245
AC Loading and Waveforms (VCC 1.5V r 0.1V)
FIGURE 5. AC Test Circuit
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
VCC x 2 at VCC
tPZH, tPHZ
1.5V r 0.1V
GND
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
Vmi
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VCC/2
Vmo
VCC/2
VX
VOL 0.1V
VY
VOH 0.1V
8
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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9
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74VCX162245 Low Voltage 16-Bit Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26: Series
Resistors in A Port Outputs
Physical Dimensions inches (millimeters) unless otherwise noted