74ALVC245
Low Voltage Bidirectional Transceiver with 3.6V
Tolerant Inputs and Outputs
Features
General Description
■ 1.65V to 3.6V VCC supply operation
The ALVC245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus
oriented applications. The T/R input determines the
direction of data flow. The OE input disables both the A
and B ports by placing them in a high impedance state.
■ 3.6V tolerant inputs and outputs
■ Power-off high impedance inputs and outputs
■ Supports Live Insertion and Withdrawal(1)
■ tPD:
– 3.4ns max. for 3.0V to 3.6V VCC
– 3.9ns max. for 2.3V to 2.7V VCC
– 6ns max. for 1.65V to 1.95V VCC
■ Uses patented Quiet Series noise/EMI reduction
circuitry
■ Latchup conforms to JEDEC JED78
■ ESD performance:
– Human body model > 2000V
– Machine model > 200V
Note:
1. To ensure the high impedance state during power up
and power down, OEn 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.
The 74ALVC245 is designed for low voltage (1.65V to
3.6V) VCC applications with I/O compatibility up to 3.6V.
The 74ALVC245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while maintaining low CMOS power dissipation.
Ordering Information
Package
Number
Package Description
74ALVC245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ALVC245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Order Number
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
All packages are lead free per JEDEC: J-STD-020B standard.
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
January 2008
Logic Symbol
Truth Table
Inputs
OE
Pin Description
Pin
Names
Description
Outputs
T/R
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(2)
H = HIGH Voltage Level
L = LOW Voltage Level
OE
Output Enable Input (Active LOW)
X = Immaterial
T/R
Transmit/Receive Input
Z = High Impedance
A0–A7
Side A Inputs or 3-STATE Outputs
B0–B7
Side B Inputs or 3-STATE Outputs
Note:
2. Unused bus terminals during HIGH Z State must be
held HIGH or LOW.
Logic Diagram
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
2
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
Connection Diagram
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
VCC
Parameter
Rating
−0.5V to +4.6V
Supply Voltage
VI
DC Input Voltage
−0.5V to 4.6V
VO
Output Voltage(3)
−0.5V to VCC +0.5V
IIK
DC Input Diode Current, VI < 0V
−50mA
IOK
DC Output Diode Current, VO < 0V
−50mA
DC Output Source/Sink Current
±50mA
IOH/IOL
±100mA
ICC or GND DC VCC or GND Current per Supply Pin
TSTG
−65°C to +150°C
Storage Temperature Range
Note:
3. IO Absolute Maximum Rating must be observed, limited to 4.6V.
Recommended Operating Conditions(4)
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
VCC
Parameter
Supply Voltage
VI
Input Voltage
VO
Output Voltage
TA
Free Air Operating Temperature
∆V / ∆t
Rating
1.65V to 3.6V
0V to VCC
0V to VCC
−40°C to +85°C
Minimum Input Edge Rate: VIN = 0.8V to 2.0V, VCC = 3.0V
10ns/V
Note:
4. Floating or unused control inputs must be held HIGH or LOW.
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
3
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
Absolute Maximum Ratings
Symbol
VIH
VIL
VOH
VOL
Parameter
VCC (V)
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
Min.
Max.
1.65–1.95
0.65 x VCC
2.3–2.7
1.7
2.7–3.6
2.0
0.35 x VCC
2.3–2.7
0.7
2.7–3.6
0.8
IOH = −100µA
VCC – 0.2
1.65
IOH = −4mA
1.2
2.3
IOH = −6mA
2.0
2.3
IOH = −12mA
1.7
2.7
2.2
3.0
2.4
Units
V
1.65–1.95
1.65–3.6
LOW Level Output Voltage
Conditions
V
V
3.0
IOH = −24mA
1.65–3.6
IOL = 100µA
0.2
1.65
IOL = 4mA
0.45
2.3
IOL = mA
0.4
2.3
IOL = 12mA
0.7
2
2.7
V
0.4
3.0
IOL = 24mA
0.55
Input Leakage Current
3.6
0 ≤ VI ≤ 3.6V
±5.0
µA
IOZ
3-STATE Output Leakage
3.6
0 ≤ VO ≤ 3.6V
±10
µA
ICC
Quiescent Supply Current
3.6
VI = VCC or GND, IO = 0
10
µA
VIH = VCC − 0.6V
750
µA
II
∆ICC
Increase in ICC per Input
3–3.6
AC Electrical Characteristics
TA = −40°C to +85°C, RL = 500Ω
CL = 50pF
VCC = 3.3V
± 0.3V
Symbol
Parameter
Min.
Max.
CL = 30pF
VCC = 2.7V
Min.
VCC = 2.5V
± 0.2V
VCC = 1.8V
± 0.15V
Max.
Min.
Max.
Min.
Max.
Units
tPHL, tPLH
Propagation Delay
1.3
3.4
3.9
1.0
3.5
1.5
6.0
ns
tPZL, tPZH
Output Enable Time
1.6
5.5
6.3
2.0
6.0
2.7
8.6
ns
tPLZ, tPHZ
Output Disable Time
1.7
5.5
5.3
0.8
4.8
1.5
8.0
ns
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
4
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
DC Electrical Characteristics
TA = +25°C
Symbol
Parameter
Conditions
VCC
Typical
Units
pF
CIN
Input Capacitance
Control
VI = 0V or VCC
3.3
3
CI/O
Input/ Output Capacitance
A or B Ports
VI = 0V or VCC
3.3
6
CPD
Power Dissipation
Capacitance
Outputs Enabled
f = 10MHz, CL = 0pF
3.3
30
2.5
27
1.8
25
3.3
0
2.5
0
1.8
0
Outputs Disabled
f = 10MHz, CL = 0pF
pF
AC Loading and Waveforms
Table 1. Values for Figure 1
Test
Switch
tPLH, tPHL
Open
tPZL, tPLZ
VL
tPZH, tPHZ
GND
Figure 1. AC Test Circuit
Table 2. Variable Matrix
(Input Characteristics: f = 1MHz; tr = tf = 2ns; Z0 = 50Ω)
VCC
Symbol
3.3V ± 0.3V
2.7V
2.5V ± 0.2V
1.8V ± 0.15V
Vmi
1.5V
1.5V
VCC / 2
VCC / 2
Vmo
1.5V
1.5V
VCC / 2
VCC / 2
VX
VOL + 0.3V
VOL + 0.3V
VOL + 0.15V
VOL + 0.15V
VY
VOH − 0.3V
VOH − 0.3V
VOH − 0.15V
VOH − 0.15V
VL
6V
6V
VCC x 2
VCC x 2
Figure 2. Waveform for Inverting and
Non-Inverting Functions
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
Figure 3. 3-STATE Output Low Enable and Disable
Times for Low Voltage Logic
www.fairchildsemi.com
5
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
Capacitance
13.00
12.60
A
11.43
20
11
B
9.50
10.65 7.60
10.00 7.40
2.25
1
PIN ONE
INDICATOR
10
0.51
0.35
0.25
M
0.65
1.27
1.27
C B A
LAND PATTERN RECOMMENDATION
2.65 MAX
SEE DETAIL A
0.33
0.20
C
0.75
0.25
X 45°
SEATING PLANE
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
GAGE PLANE
(R0.10)
0.10 C
0.30
0.10
0.25
8°
0°
A) THIS PACKAGE CONFORMS TO JEDEC
MS-013, VARIATION AC, ISSUE E
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
D) CONFORMS TO ASME Y14.5M-1994
1.27
0.40
SEATING PLANE
E) LANDPATTERN STANDARD: SOIC127P1030X265-20L
(1.40)
DETAIL A
F) DRAWING FILENAME: MKT-M20BREV3
SCALE: 2:1
Figure 4. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
6
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
Physical Dimensions
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 5. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
7
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* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.
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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS
PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
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 FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
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 of the user.
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.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
the design.
Obsolete
Not In Production
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I32
©2001 Fairchild Semiconductor Corporation
74ALVC245 Rev. 1.3.0
www.fairchildsemi.com
8
74ALVC245 — Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
TRADEMARKS
The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global
subsidiaries, and is not intended to be an exhaustive list of all such trademarks.
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