74F245
Octal Bidirectional Transceiver with 3-STATE Outputs
Features
General Description
■ Non-inverting buffers
The 74F245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is intended for busoriented applications. Current sinking capability is
24mA at the A Ports and 64mA at the B Ports. The
Transmit/Receive (T/R) input determines the direction
of data flow through the bidirectional transceiver. Transmit (active HIGH) enables data from A Ports to B Ports;
Receive (active LOW) enables data from B Ports to
A Ports. The Output Enable input, when HIGH, disables
both A and B Ports by placing them in a High Z
condition.
■ Bidirectional data path
■ A outputs sink 24mA
■ B outputs sink 64mA
Ordering Information
Order
Number
74F245SC
74F245SJ
Package
Number
M20B
M20D
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F245MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74F245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74F245PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
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.
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
January 2008
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Connection Diagram
Logic Symbols
IEEE/IEC
Truth Table
Inputs
OE
T/R
L
L
Bus B Data to Bus A
Output
L
H
Bus A Data to Bus B
H
X
High Z State
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Unit Loading/Fan Out
Pin Names
Description
U.L.
HIGH/LOW
Input IIH/IIL
Output IOH/IOL
1.0/2.0
20µA/–1.2mA
OE
Output Enable Input (Active LOW)
T/R
Transmit/Receive Input
1.0/2.0
20µA/–1.2mA
A0–A7
Side A Inputs or
3.5/1.083
70 µA/–0.65mA
3-STATE Outputs
150/40 (38.3)
–3 mA/24mA (20mA)
B0–B7
Side B Inputs or
3.5/1.083
70µA/–0.65mA
3-STATE Outputs
600/106.6 (80)
–12mA/64mA (48mA)
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
2
Symbol
TSTG
Parameter
Rating
Storage Temperature
–65°C to +150°C
TA
Ambient Temperature Under Bias
–55°C to +125°C
TJ
Junction Temperature Under Bias
–55°C to +150°C
VCC
VCC Pin Potential to Ground Pin
–0.5V to +7.0V
VI
Input Voltage(1)
–0.5V to +7.0V
II
Input Current(1)
–30mA to +5.0mA
Voltage Applied to Output in HIGH State (with VCC = 0V)
Standard Output
–0.5V to VCC
3-STATE Output
–0.5V to +5.5V
Current Applied to Output in LOW State (Max.)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min.)
4000V
Note:
1. Either voltage limit or current limit is sufficient to protect inputs.
Recommended Operating Conditions
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
TA
VCC
Parameter
Rating
Free Air Ambient Temperature
0°C to +70°C
Supply Voltage
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
+4.5V to +5.5V
www.fairchildsemi.com
3
74F245 — Octal Bidirectional Transceiver with 3-STATE 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.
Symbol
Parameter
VCC
Conditions
Min.
2.0
Typ.
Max.
Units
V
VIH
Input HIGH Voltage
Recognized as a HIGH
Signal
VIL
Input LOW Voltage
Recognized as a LOW
Signal
0.8
V
VCD
Input Clamp Diode Voltage
Min.
IIN = –18mA
–1.2
V
VOH
Output HIGH Voltage
Min.
IOH = –3mA (An)
2.4
10% VCC
IOH = –15mA (Bn)
2.0
5% VCC
IOH = –3mA (An)
2.7
10% VCC
V
IOL = 24mA (An)
0.5
IOL = 64mA (Bn)
0.55
VIN = 2.7V
5.0
µA
Max.
VIN = 7.0V (OE, T/R)
7.0
µA
Input HIGH Current Breakdown (I/O)
Max.
VIN = 5.5V (An, Bn)
0.5
mA
ICEX
Output HIGH Leakage Current
Max.
VOUT = VCC (An, Bn)
50
µA
VID
Input Leakage Test
0.0
IID = 1.9µA, All Other
Pins Grounded
IOD
Output Leakage Circuit Current
0.0
VIOD = 150mV, All Other
Pins Grounded
3.75
µA
IIL
Input LOW Current
VOL
Output LOW Voltage
10% VCC
Min.
IIH
Input HIGH Current
Max.
IBVI
Input HIGH Current Breakdown Test
IBVIT
10% VCC
4.75
V
V
Max.
VIN = 0.5V (T/R, OE)
–1.2
mA
IIH + IOZH Output Leakage Current
Max.
VOUT = 2.7V (An, Bn)
70
µA
IIL + IOZL
Output Leakage Current
Max.
VOUT = 0.5V (An, Bn)
–650
µA
IOS
Output Short-Circuit Current
Max.
VOUT = 0V (An)
–60
–150
mA
VOUT = 0V (Bn)
–100
–225
IZZ
Bus Drainage Test
0.0V
VOUT = 5.25V(An, Bn)
ICCH
Power Supply Current
Max.
VO = HIGH
ICCL
Power Supply Current
Max.
ICCZ
Power Supply Current
Max.
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
500
µA
70
90
mA
VO = LOW
95
120
mA
VO = HIGH Z
85
110
mA
www.fairchildsemi.com
4
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
DC Electrical Characteristics
TA = +25°C,
VCC = +5.0V,
CL = 50pF
Symbol
tPLH, tPHL
tPZH, tPZL
tPHZ, tPLZ
Parameter
TA = – 55°C to +125°C, TA = 0°C to +70°C,
CL = 50pF
CL = 50pF
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
Units
Propagation Delay,
2.5
4.2
6.0
2.0
7.5
2.0
7.0
ns
An to Bn or Bn to An
2.5
4.2
6.0
2.0
7.5
2.0
7.0
Output Enable Time
Output Disable Time
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
3.0
5.3
7.0
2.5
9.0
2.5
8.0
3.5
6.0
8.0
3.0
10.0
3.0
9.0
2.0
5.0
6.5
2.0
9.0
2.0
7.5
2.0
5.0
6.5
2.0
10.0
2.0
7.5
ns
ns
www.fairchildsemi.com
5
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
AC Electrical Characteristics
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 1. 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/
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
6
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Physical Dimensions
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Physical Dimensions (Continued)
Figure 2. 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/
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
7
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Physical Dimensions (Continued)
Figure 3. 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/
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
8
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Physical Dimensions (Continued)
Figure 4. 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/
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
9
26.92
24.89
7.11
6.09
PIN #1
(0.97)
1.78
1.14
2.54
0.36
0.56
.001[.025]
3.43
3.17
5.33 MAX
7° TYP
7.87
7° TYP
3.55
3.17
0.38 MIN
7.62
10.92 MAX
0.20
0.35
C
NOTES:
Figure 5. 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 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/
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
10
74F245 — Octal Bidirectional Transceiver with 3-STATE Outputs
Physical Dimensions (Continued)
ACEx®
Build it Now™
CorePLUS™
CROSSVOLT™
CTL™
Current Transfer Logic™
EcoSPARK®
EZSWITCH™ *
™
PDP-SPM™
SyncFET™
®
Power220®
®
Power247
The Power Franchise®
POWEREDGE®
Power-SPM™
PowerTrench®
TinyBoost™
Programmable Active Droop™
TinyBuck™
®
QFET
TinyLogic®
QS™
TINYOPTO™
QT Optoelectronics™
TinyPower™
®
Quiet Series™
TinyPWM™
RapidConfigure™
TinyWire™
Fairchild®
SMART START™
Fairchild Semiconductor®
µSerDes™
®
SPM
FACT Quiet Series™
UHC®
STEALTH™
FACT®
Ultra FRFET™
SuperFET™
FAST®
UniFET™
SuperSOT™-3
FastvCore™
VCX™
®
®*
SuperSOT™-6
FlashWriter
SuperSOT™-8
* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.
FPS™
FRFET®
Global Power ResourceSM
Green FPS™
Green FPS™ e-Series™
GTO™
i-Lo™
IntelliMAX™
ISOPLANAR™
MegaBuck™
MICROCOUPLER™
MicroFET™
MicroPak™
MillerDrive™
Motion-SPM™
OPTOLOGIC®
OPTOPLANAR®
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
©1988 Fairchild Semiconductor Corporation
74F245 Rev. 1.4.0
www.fairchildsemi.com
11
74F245 — Octal Bidirectional Transceiver with 3-STATE 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.
