74F245 Octal Bidirectional Transceiver with 3-STATE Outputs
April 1988
Revised March 2005
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
74F245SC_NL
(Note 1)
74F245SJ
74F245MSA
74F245MTC
74F245PC
74F245PC_NL
(Note 1)
Package Number
M20B
M20B
M20D
MSA20
MTC20
N20A
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Pb-Free 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300"
Wide
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 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
Pb-Free 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.
Note 1:
“_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Please use order number as indicated.
Logic Symbols
IEEE/IEC
© 2005 Fairchild Semiconductor Corporation
DS009503
www.fairchildsemi.com
74F245
Absolute Maximum Ratings
(Note 2)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 3)
Input Current (Note 3)
Voltage Applied to Output
in HIGH State (with V
CC
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
0V)
65
q
C to
150
q
C
55
q
C to
125
q
C
55
q
C to
150
q
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
q
C to
70
q
C
4.5V to
5.5V
0.5V to V
CC
0.5V to
5.5V
Note 2:
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 3:
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
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
I
IL
I
IH
I
OZH
I
IL
I
OZL
I
OS
I
ZZ
I
CCH
I
CCL
I
CCZ
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
4.75
3.75
10% V
CC
10% V
CC
2.4
2.0
2.7
0.5
0.55
5.0
7.0
0.5
50
V
Min
Max
Max
Max
Max
0.0
0.0
Max
Max
Max
Max
0.0V
Max
Max
Max
V
Min
Min
2.0
0.8
Typ
Max
Units
V
V
V
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
I
OH
I
OH
I
OH
I
OL
I
OL
V
IN
V
IN
V
IN
V
OUT
I
ID
V
IOD
1.2
18 mA
3 mA (A
n
)
15 mA (B
n
)
3 mA (A
n
)
24 mA (A
n
)
64 mA (B
n
)
2.7V
7.0V (OE, T/R)
5.5 V (A
n
, B
n
)
V
CC
(A
n
, B
n
)
1.9
P
A
150 mV
P
A
P
A
mA
P
A
V
All Other Pins Grounded
All Other Pins Grounded
V
IN
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
O
V
O
V
O
0.5V (T/R, OE)
2.7V (A
n
, B
n
)
0.5V (A
n
, B
n
)
0V (A
n
)
0V (B
n
)
5.25V(A
n
, B
n
)
HIGH
LOW
HIGH Z
P
A
mA
1.2
70
P
A
P
A
mA
650
60
100
150
225
500
90
120
110
P
A
mA
mA
mA
3
www.fairchildsemi.com
京公网安备 11010802033920号
EEWORLD
