Is Now Part of
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Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers
will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor
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(_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain
device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated
device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please
email any questions regarding the system integration to Fairchild_questions@onsemi.com.
ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number
of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right
to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON
Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON
Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA
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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
74LVXC3245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with 3-STATE Outputs
Features
General Description
■ Bidirectional interface between 3V and 3V-to-5V buses
■ Control inputs compatible with TTL level
The LVXC3245 is a 24-pin dual-supply, 8-bit configurable
voltage interface transceiver suited for PCMCIA and other
real time configurable I/O applications. The VCCA pin
accepts a 3V supply level. The A Port is a dedicated 3V
port. The VCCB pin accepts a 3V-to-5V supply level. The B
Port is configured to track the VCCB supply level respectively. A 5V level on the VCC pin will configure the I/O pins
at a 5V level and a 3V VCC will configure the I/O pins at a
3V level. The A Port should interface with a 3V host system
and the B Port to the card slots. This device will allow the
VCCB voltage source pin and I/O pins on the B Port to float
when OE is HIGH. This feature is necessary to buffer data
to and from a PCMCIA socket that permits PCMCIA cards
to be inserted and removed during normal operation.
■ Outputs source/sink up to 24 mA
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
■ Implements proprietary EMI reduction circuitry
■ Flexible VCCB operating range
■ Allows B Port and VCCB to float simultaneously when OE
is HIGH
■ Functionally compatible with the 74 series 245
Ordering Code:
Order Number
Package Number
74LVXC3245WM
M24B
Package Description
74LVXC3245QSC
MQA24
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74LVXC3245MTC
MTC24
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
224-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol/s
Connection Diagram/s
Pin Descriptions
Pin Names
Description
OE
Output Enable Input
T/R
Transmit/Receive Input
A0–A7
Side A Inputs or 3-STATE Outputs
B0–B7
Side B Inputs or 3-STATE Outputs
© 1994 Fairchild Semiconductor Corporation
www.fairchildsemi.com
74LVXC3245 — 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
February 2009
Inputs
Outputs
OE
T/R
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
HIGH-Z State
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Logic Diagram/s
www.fairchildsemi.com
2
74LVXC3245 — 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
Truth Table/s
Recommended Operating
Conditions (Note 2)
−0.5V to +7.0V
Supply Voltage (VCCA, VCCB)
−0.5V to VCCA +0.5V
DC Input Voltage (VI) @ OE, T/R
Supply Voltage
DC Input/Output Voltage (VI/O)
@ An
−0.5V to VCCA +0.5V
@ Bn
−0.5V to VCCB +0.5V
VCCA
2.7V to 3.6V
VCCB
3.0V to 5.5V
Input Voltage (VI) @ OE, T/R
DC Input Diode Current (IIK)
0V to VCCA
Input Output Voltage (VI/O)
±20 mA
@ An
DC Output Diode (IOK) Current
±50 mA
@ Bn
DC Output Source or Sink Current (IO)
±50 mA
@ OE, T/R
0V to VCCA
0V to VCCB
−40°C to +85°C
Free Air Operating Temperature (TA)
DC VCC or Ground Current
Minimum Input Edge Rate (Δt/ΔV)
±50 mA
per Output Pin (ICC or IGND )
±200 mA
and Max Current
VCC @ 3.0V, 4.5V, 5.5V
−65°C to +150°C
Storage Temperature Range (TSTG)
Note 1: 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.
±300 mA
DC Latch-Up Source or Sink Current
8 ns/V
VIN from 30% to 70% of VCC
Note 2: The A Port unused pins (inputs or I/Os) must be held HIGH or
LOW. They may not float.
DC Electrical Characteristics
Symbol
VIHA
Parameter
TA = −40°C to +85°C
Guaranteed Limits
Units
Conditions
An,
2.7
3.0
2.0
2.0
VOUT ≤ 0.1V
3.0
3.6
2.0
2.0
or
Voltage
T/R
3.6
5.5
2.0
2.0
Bn
2.7
3.0
2.0
2.0
3.0
3.6
2.0
2.0
3.6
5.5
3.85
3.85
V
≥VCC − 0.1V
Maximum LOW
An,
2.7
3.0
0.8
0.8
VOUT ≤ 0.1V
Level Input
OE
3.0
3.6
0.8
0.8
or
Voltage
T/R
3.6
5.5
0.8
0.8
Bn
2.7
3.0
0.8
0.8
3.0
3.6
0.8
0.8
3.6
5.5
1.65
1.65
V
≥VCC − 0.1V
Minimum HIGH Level
3.0
3.0
2.99
2.9
2.9
IOUT = −100 μA
Output Voltage
3.0
3.0
2.85
2.56
2.46
IOH = −12 mA
3.0
3.0
2.65
2.35
2.25
2.7
3.0
2.5
2.3
2.2
IOH = −12 mA
2.7
4.5
2.3
2.1
2.0
IOH = −24 mA
3.0
3.0
2.99
2.9
2.9
IOUT = −100 μA
3.0
3.0
2.85
2.56
2.46
IOH = −12 mA
3.0
3.0
2.65
2.35
2.25
3.0
4.5
4.25
3.86
3.76
Maximum LOW Level
3.0
3.0
0.002
0.1
0.1
IOUT = 100 μA
Output Voltage
3.0
3.0
0.21
0.36
0.44
IOL = 24 mA
2.7
3.0
0.11
0.36
0.44
2.7
4.5
0.22
0.42
0.5
3.0
3.0
0.002
0.1
0.1
3.0
3.0
0.21
0.36
0.44
0.18
VOLB
IIN
TA = 25°C
Typ
OE
VOHB
VOLA
(V)
Level Input
VILB
VOHA
VCCB
(V)
Minimum HIGH
VIHB
VILA
VCCA
3.0
4.5
0.36
0.44
Maximum Input
3.6
3.6
±0.1
±1.0
Leakage Current @
3.6
5.5
±0.1
±1.0
V
V
IOH = −24 mA
IOH = −24 mA
IOH = −24 mA
V
IOL = 12 mA
IOL = 24 mA
IOUT = 100 μA
V
IOL = 24 mA
IOL = 24 mA
VI = VCCA, GND
μA
OE, T/R
3
www.fairchildsemi.com
74LVXC3245 — 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
Absolute Maximum Ratings(Note 1)
74LVXC3245
DC Electrical Characteristics
Symbol
IOZA
Parameter
(Continued)
VCCA
VCCB
(V)
(V)
TA = 25°C
Typ
TA = −40°C to +85°C
Units
Maximum 3-STATE
3.6
3.6
±0.5
±5.0
Output Leakage
3.6
5.5
±0.5
±5.0
Maximum 3-STATE
3.6
3.6
±0.5
±5.0
Output Leakage
3.6
5.5
±0.5
±5.0
1.35
1.5
VI = VIL, VIH,
µA
VI = VIL, VIH,
µA
ICCA1
Maximum
Bn
3.6
5.5
ICC/Input
All Inputs
3.6
3.6
0.35
0.5
1.0
3.6
Open
5
50
mA
µA
Bn = Open, OE = VCCA,
T/R = VCCA, VCCB =
Open
as B Port Floats
ICCA2
VI = VCCB–2.1V
VI = VCC–0.6V
An = VCCA or GND
Quiescent VCCA
Supply Current
OE = VCCA
VO = VCCB, GND
@ Bn
∆ICC
OE = VCCA
VO = VCCA, GND
@ An
IOZB
Conditions
Guaranteed Limits
Quiescent VCCA
3.6
3.6
5
50
Supply Current
3.6
5.5
5
50
An = VCCA or GND,
µA
Bn = VCCB or GND,
OE = GND, T/R = GND
ICCB
Quiescent VCCB
3.6
3.6
5
50
Supply Current
3.6
5.5
8
80
An = VCCA or GND,
µA
Bn = VCCB or GND,
OE = GND, T/R = VCCA
VOLPA
VOLPB
VOLVA
VOLVB
VIHDA
VIHDB
VILDA
VILDB
Quiet Output
3.3
3.3
0.8
Maximum Dynamic
3.3
5.0
0.8
VOL
3.3
3.3
0.8
3.3
5.0
1.5
Quiet Output
3.3
3.3
−0.8
Minimum Dynamic
3.3
5.0
−0.8
VOL
3.3
3.3
−0.8
3.3
5.0
−1.2
Minimum HIGH
3.3
3.3
2.0
Level Dynamic
3.3
5.0
2.0
Input Voltage
3.3
3.3
2.0
3.3
5.0
3.5
Maximum LOW
3.3
3.3
0.8
Level Dynamic
3.3
5.0
0.8
Input Voltage
3.3
3.3
0.8
3.3
5.0
1.5
Note 3: Worst case package.
Note 4: Max number of outputs defined as (n). Data inputs are driven 0V to VCC level; one output at GND.
Note 5: Max number of Data Inputs (n) switching. (n–1) inputs switching 0V to VCC level. Input-under-test switching:
VCC level to threshold (VIHD), 0V to threshold (VILD), f = 1 MHz.
www.fairchildsemi.com
4
V
V
V
V
V
V
V
V
(Note 3)(Note 4)
(Note 3)(Note 4)
(Note 3)(Note 4)
(Note 3)(Note 4)
(Note 3)(Note 5)
(Note 3)(Note 5)
(Note 3)(Note 5)
(Note 3)(Note 5)
Symbol
Parameter
TA = +25°C
TA = −40°C to +85°C
TA = +25°C
CL = 50 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
VCCA = 2.7V–3.6V
VCCA = 2.7V–3.6V
VCCA = 2.7V–3.6V
VCCA = 2.7V–3.6V
VCCB = 4.5V–5.5V
VCCB = 4.5V–5.5V
VCCB = 3.0V–3.6V
VCCB = 3.0V–3.6V
Min
Typ
Max
Min
Max
Min
Typ
(Note 6)
TA = −40°C to +85°C
Max
Min
Units
Max
(Note 7)
tPHL
Propagation Delay
1.0
4.8
8.0
1.0
8.5
1.0
5.5
8.5
1.0
9.0
tPLH
A to B
1.0
3.9
6.5
1.0
7.0
1.0
5.2
8.0
1.0
8.5
tPHL
Propagation Delay
1.0
3.8
6.5
1.0
7.0
1.0
4.4
7.0
1.0
7.5
tPLH
B to A
1.0
4.3
7.5
1.0
8.0
1.0
5.1
7.5
1.0
8.0
tPZL
Output Enable Time
1.0
4.7
8.0
1.0
8.5
1.0
6.0
9.0
1.0
9.5
tPZH
OE to B
1.0
4.8
8.5
1.0
9.0
1.0
6.1
9.5
1.0
10.0
tPZL
Output Enable Time
1.0
5.9
9.5
1.0
10.0
1.0
6.4
10.0
1.0
10.5
tPZH
OE to A
1.0
5.4
9.0
1.0
9.5
1.0
5.8
9.0
1.0
9.5
tPHZ
Output Disable Time
1.0
4.0
8.0
1.0
8.5
1.0
6.3
9.5
1.0
10.0
tPLZ
OE to B
1.0
3.8
7.5
1.0
8.0
1.0
4.5
8.0
1.0
8.5
tPHZ
Output Disable Time
1.0
4.6
9.5
1.0
10.0
1.0
5.2
9.5
1.0
10.0
tPLZ
OE to A
1.0
3.1
6.5
1.0
7.0
1.0
3.4
6.5
1.0
7.0
tOSHL
Output to Output
tOSLH
Skew (Note 8)
1.0
1.5
1.0
1.5
1.5
1.5
ns
ns
ns
ns
ns
ns
ns
Data to Output
Note 6: Typical values at VCCA = 3.3V, VCCB = 5.0V @ 25°C.
Note 7: Typical values at VCCA = 3.3V, VCCB = 3.3V @ 25°C.
Note 8: 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). Parameter guaranteed by design.
Capacitance
Typ
Units
CIN
Symbol
Input Capacitance
Parameter
4.5
pF
VCC = Open
Conditions
CI/O
Input/Output Capacitance
10
pF
VCCA = 3.3V
CPD
Power Dissipation
A→B
50
pF
VCCB = 5.0V
Capacitance (Note 9)
B→A
40
pF
VCCA = 3.3V
VCCB = 5.0V
Note 9: CPD is measured at 10 MHz.
5
www.fairchildsemi.com
74LVXC3245
AC Electrical Characteristics
74LVXC3245
Power Up Considerations
figured as inputs. With VCCA receiving power first, the A
I/O Port should be configured as inputs to help guard
against bus contention and oscillations.
To insure the system does not experience unnecessary ICC
current draw, bus contention, or oscillations during power
up, the following guidelines should be adhered to (refer to
Table 1):
• A side data inputs should be driven to a valid logic level.
This will prevent excessive current draw.
• Power up the control side of the device first. This is the
VCCA side.
The above steps will ensure that no bus contention or oscillations, and therefore no excessive current draw occurs
during the power up cycling of these devices. These steps
will help prevent possible damage to the translator devices
and potential damage to other system components.
• OE should ramp with or ahead of VCCA. This will help
guard against bus contention.
• The Transmit/Receive control pin (T/R) should ramp with
VCCA, this will ensure that the A Port data pins are con-
TABLE 1. Low Voltage Translator Power Up Sequencing Table
Device Type
74LVXC3245
VCCA
VCCB
T/R
OE
A Side I/O
3V
3V to 5.5V
ramp
ramp
logic
(power up 1st)
configurable
with VCCA
with VCCA
0V or VCCA
B Side I/O
outputs
Floatable Pin
Allowed
yes, VCCB and B
I/O’s w/ OE HIGH
Please reference Application Note AN-5001 for more detailed information on using Fairchild’s LVX Low Voltage Dual
Supply CMOS Translating Transceivers.
Configurable I/O Application for PCMCIA Cards
Block Diagram
will always experience rail to rail output swings, maximizing
the reliability of the interface.
The LVXC3245 is a 24-pin dual supply device well suited
for PCMCIA configurable I/O applications. Ideal for low
power notebook designs, the LVXC3245 consumes less
than 1 mW of quiescent power in all modes of operation.
The LVXC3245 meets all PCMCIA I/O voltage requirements at 5V and 3.3V operation. By tying VCCB of the
LVXC3245 to the card voltage supply, the PCMCIA card
www.fairchildsemi.com
The VCCA pin on the LVXC3245 must always be tied to a
3V power supply. This voltage connection provides internal
references needed to account for variations in VCCB. When
connected as in the figure above, the LVXC3245 meets all
the voltage and current requirements of the ISA bus standard (IEEE P996).
6
74LVXC3245
Physical Dimensions inches (millimeters) unless otherwise noted
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M24B
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
Package Number MQA24
7
www.fairchildsemi.com
74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC24
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.
www.fairchildsemi.com
www.fairchildsemi.com
8
74LVXC3245 — 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
www.fairchildsemi.com
9
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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