74F245 Octal Bidirectional Transceiver with 3-STATE Outputs
April 1988
Revised April 1999
74F245
Octal Bidirectional Transceiver with 3-STATE Outputs
General Description
The 74F245 contains eight non-inverting bidirectional buff-
ers with 3-STATE outputs and is intended for bus-oriented
applications. Current sinking capability is 24 mA at the A
Ports and 64 mA 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.
Features
s
Non-inverting buffers
s
Bidirectional data path
s
A outputs sink 24 mA
s
B outputs sink 64 mA
Ordering Code:
Order Number
74F245SC
74F245SJ
74F245MSA
74F245MTC
74F245PC
Package Number
M20B
M20D
MSA20
MTC20
N20A
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
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation
DS009503.prf
www.fairchildsemi.com
74F245
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−0.5V
to V
CC
−0.5V
to
+5.5V
−65°C
to
+150°C
−55°C
to
+125°C
−55°C
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to
+5.5V
Note 1:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
10% V
CC
10% V
CC
5% V
CC
V
OL
I
IH
I
BVI
I
BVIT
I
CEX
V
ID
I
OD
I
IL
I
IH
+
I
OZH
I
IL
+
I
OZL
I
OS
I
ZZ
I
CCH
I
CCL
I
CCZ
Output LOW Voltage
Input HIGH Current
Input HIGH Current Breakdown Test
Input HIGH Current Breakdown (I/O)
Output HIGH Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
70
95
85
−60
−100
−1.2
70
−650
−150
−225
500
90
120
110
µA
mA
mA
mA
0.0V
Max
Max
Max
mA
µA
µA
mA
Max
Max
Max
Max
3.75
µA
0.0
4.75
10% V
CC
10% V
CC
2.4
2.0
2.7
0.5
0.55
5.0
7.0
0.5
50
µA
µA
mA
µA
V
Max
Max
Max
Max
0.0
V
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
Min
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA (A
n
)
I
OH
= −15
mA (B
n
)
I
OH
= −3
mA (A
n
)
I
OL
=
24 mA (A
n
)
I
OL
=
64 mA (B
n
)
V
IN
=
2.7V
V
IN
=
7.0V (OE, T/R)
V
IN
=
5.5 V (A
n
, B
n
)
V
OUT
=
V
CC
(A
n
, B
n
)
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
IN
=
0.5V (T/R, OE)
V
OUT
=
2.7V (A
n
, B
n
)
V
OUT
=
0.5V (A
n
, B
n
)
V
OUT
=
0V (A
n
)
V
OUT
=
0V (B
n
)
V
OUT
=
5.25V(A
n
, B
n
)
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
3
www.fairchildsemi.com
74F245
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
5
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