FAIRCHILD 74LCX245BQX_08

74LCX245
Low Voltage Bidirectional Transceiver with 5V Tolerant
Inputs and Outputs
Features
General Description
■ 5V tolerant inputs and outputs
The LCX245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is designed for low
voltage (2.5V and 3.3V) VCC applications with capability
of interfacing to a 5V signal environment. The T/R input
determines the direction of data flow through the device.
The OE input disables both the A and B ports by placing
them in a high impedance state.
■ 2.3V to 3.6V VCC specifications provided
■ 7.0ns tPD max. (VCC = 3.3V), 10µA ICC max.
■ Power down high impedance inputs and outputs
■ Supports live insertion/withdrawal(1)
■ ±24mA output drive (VCC = 3.0V)
■ Implements proprietary noise/EMI reduction circuitry
■ Latch-up performance exceeds 500mA
■ ESD performance:
– Human body model > 2000V
– Machine model > 200V
■ Leadless DQFN package
The LCX245 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.
Note:
1. To ensure the high-impedance state during power up
or down, OE should be tied to VCC through a pull-up
resistor: the minimum value or the resistor is
determined by the current-sourcing capability of the
driver.
Ordering Information
Package
Number
Package Description
74LCX245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCX245SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Order Number
74LCX245BQX(2)
MLP20B
20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN),
JEDEC MO-241, 2.5 x 4.5mm
74LCX245MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74LCX245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
4.4mm Wide
Note:
2. DQFN package available in Tape and Reel only.
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.
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
February 2008
Logic Symbol
Pin Assignments for SOIC, SOP, SSOP, and TSSOP
Truth Table
Inputs
Pin Assignment for DQFN
OE
T/R
Outputs
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(3)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Note:
3. Unused bus terminals during HIGH Z State must be
held HIGH or LOW.
Logic Diagram
(Top Through View)
Pin Description
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
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
2
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Connection Diagrams
Symbol
VCC
Parameter
Rating
Supply Voltage
–0.5V to +7.0V
VI
DC Input Voltage
–0.5V to +7.0V
VO
DC Output Voltage
Output in 3-STATE
–0.5V to +7.0V
Output in HIGH or LOW
State(4)
IIK
DC Input Diode Current, VI < GND
IOK
DC Output Diode Current
–0.5V to VCC + 0.5V
–50mA
VO < GND
–50mA
VO > VCC
+50mA
IO
DC Output Source/Sink Current
±50mA
ICC
DC Supply Current per Supply Pin
±100mA
IGND
DC Ground Current per Ground Pin
±100mA
TSTG
Storage Temperature
–65°C to +150°C
Note:
4. IO Absolute Maximum Rating must be observed.
Recommended Operating Conditions(5)
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
Min.
Max.
Units
Operating
2.0
3.6
V
Data Retention
1.5
3.6
0
5.5
V
V
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH / IOL
TA
∆t / ∆V
3-STATE
0
5.5
HIGH or LOW State
0
VCC
Output Current
VCC = 3.0V–3.6V
±24
VCC = 2.7V–3.0V
±12
VCC = 2.3V–2.7V
±8
Free-Air Operating Temperature
Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V
mA
–40
85
°C
0
10
ns / V
Note:
5. Unused inputs must be held HIGH or LOW. They may not float.
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
3
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Absolute Maximum Ratings
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.
TA = –40°C to +85°C
Symbol
VIH
VIL
VOH
VOL
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
VCC (V)
Conditions
Min.
2.3–2.7
1.7
2.7–3.6
2.0
Max.
V
2.3–2.7
0.7
2.7–3.6
0.8
2.3–3.6
IOH = –100µA
V
VCC – 0.2
2.3
IOH = –8mA
1.8
2.7
IOH = –12mA
2.2
3.0
IOH = –18mA
2.4
IOH = –24mA
2.2
V
IOL = 100µA
0.2
2.3
IOL = 8mA
0.6
2.7
IOL = 12mA
0.4
3.0
IOL = 16mA
0.4
IOL = 24mA
0.55
2.3–3.6
Units
V
Input Leakage Current
2.3–3.6
0 ≤ VI ≤ 5.5V
±5.0
µA
IOZ
3-STATE Output Leakage
2.3–3.6
0 ≤ VO ≤ 5.5V,
VI = VIH or VIL
±5.0
µA
IOFF
Power-Off Leakage Current
0
VI or VO = 5.5V
10
µA
ICC
Quiescent Supply Current
µA
II
∆ICC
Increase in ICC per Input
2.3–3.6
2.3–3.6
VI = VCC or GND
10
3.6V ≤ VI, VO ≤ 5.5V(6)
±10
VIH = VCC – 0.6V
500
µA
Note:
6. Outputs disabled or 3-STATE only.
AC Electrical Characteristics
TA = –40°C to +85°C, RL = 500Ω
VCC = 3.3V ± 0.3V,
CL = 50pF
Symbol
Parameter
tPHL, tPLH
VCC = 2.7V,
CL = 50pF
VCC = 2.5V ± 0.2V,
CL = 30pF
Min.
Max.
Min.
Max.
Min.
Max.
Units
Propagation Delay,
An to Bn or Bn to An
1.5
7.0
1.5
8.0
1.5
8.4
ns
tPZL, tPZH
Output Enable Time
1.5
8.5
1.5
9.5
1.5
10.5
ns
tPLZ, tPHZ
Output Disable Time
1.5
7.5
1.5
8.5
1.5
9.0
ns
tOSHL, tOSLH
Output to Output
Skew(7)
1.0
ns
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).
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
4
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
DC Electrical Characteristics
TA = 25°C
Symbol
Parameter
VCC (V)
VOLP
Quiet Output Dynamic Peak VOL
3.3
VOLV
Quiet Output Dynamic Valley VOL
Conditions
Typical
Unit
CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
2.5
CL = 30pF, VIH = 2.5V, VIL = 0V
0.6
3.3
CL = 50pF, VIH = 3.3V, VIL = 0V
–0.8
2.5
CL = 30pF, VIH = 2.5V, VIL = 0V
–0.6
V
Capacitance
Symbol
Parameter
Conditions
Typical
Units
Input Capacitance
VCC = Open, VI = 0V or VCC
7.0
pF
COUT
Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8.0
pF
CPD
Power Dissipation Capacitance
VCC = 3.3V, VI = 0V or VCC, f = 10MHz
25.0
pF
CIN
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
5
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Dynamic Switching Characteristics
Test
Switch
tPLH, tPHL
Open
tPZL, tPLZ
6V at VCC = 3.3 ± 0.3V
VCC x 2 at VCC = 2.5 ± 0.2V
tPZH, tPHZ
GND
Figure 1. AC Test Circuit (CL includes probe and jig capacitance)
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
3-STATE Output Low Enable and
Disable Times for Logic
trise and tfall
VCC
Symbol
3.3V ± 0.3V
2.7V
2.5V ± 0.2V
Vmi
1.5V
1.5V
VCC / 2
Vmo
1.5V
1.5V
VCC / 2
Vx
VOL + 0.3V
VOL + 0.3V
VOL + 0.15V
Vy
VOH – 0.3V
VOH – 0.3V
VOH – 0.15V
Figure 2. Waveforms (Input Characteristics; f = 1MHz, tr = tf = 3ns)
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
6
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
AC Loading and Waveforms (Generic for LCX Family)
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Schematic Diagram (Generic for LCX Family)
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
7
Tape Format for DQFN
Package Designator
Tape Section
Number of Cavities
Cavity Status
Cover Tape Status
BQX
Leader (Start End)
125 (typ.)
Empty
Sealed
Carrier
3000
Filled
Sealed
Trailer (Hub End)
75 (typ.)
Empty
Sealed
Tape Dimension inches (millimeters)
Reel Dimensions inches (millimeters)
Tape Size
A
B
12mm
13.0 (330.0)
0.059 (1.50)
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
C
D
N
0.512 (13.00) 0.795 (20.20) 2.165 (55.00)
W1
W2
0.488 (12.4)
0.724 (18.4)
www.fairchildsemi.com
8
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Tape and Reel Specification
13.00
12.60
A
11.43
20
11
B
9.50
10.65 7.60
10.00 7.40
2.25
1
10
0.51
0.35
PIN ONE
INDICATOR
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 3. 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/
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
9
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Physical Dimensions
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 4. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm 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/
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
10
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 5. 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm
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/
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
11
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 6. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm 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/
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
12
74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 8. 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/
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
13
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PowerTrench®
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Quiet Series™
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SuperSOT™-3
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FPS™
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* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.
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. I33
©1994 Fairchild Semiconductor Corporation
74LCX245 Rev. 1.11.0
www.fairchildsemi.com
14
74LCX245 — Low Voltage Bidirectional Transceiver with 5V 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.