CY54FCT245T, CY74FCT245T
8-BIT TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS018B 鈥?MAY 1994 鈥?REVISED NOVEMBER 2001
D
D
D
D
D
D
D
D
D
D
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced V
OH
(Typically = 3.3 V) Versions
of Equivalent FCT Functions
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
I
off
Supports Partial-Power-Down Mode
Operation
ESD Protection Exceeds JESD 22
鈥?2000-V Human-Body Model (A114-A)
鈥?200-V Machine Model (A115-A)
鈥?1000-V Charged-Device Model (C101)
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
CY54FCT245T
鈥?48-mA Output Sink Current
12-mA Output Source Current
CY74FCT245T
鈥?64-mA Output Sink Current
32-mA Output Source Current
3-State Outputs
CY54FCT245T . . . D PACKAGE
CY74FCT245T . . . P, Q, OR SO PACKAGE
(TOP VIEW)
T/R
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
OE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
CY54FCT245T . . . L PACKAGE
(TOP VIEW)
T/R
V
CC
A
2
A
3
A
4
A
5
A
6
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
OE
B
0
B
1
B
2
B
3
B
4
The 鈥橣CT245T devices contain eight noninverting
bidirectional buffers with 3-state outputs and are
intended for bus-oriented applications.
The transmit/receive (T/R) input determines the direction of data flow through these bidirectional transceivers.
Transmit (active high) enables data from A ports to B ports. The output enable (OE), when high, disables both
the A and B ports by putting them in the high-impedance state.
These devices are fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the
outputs, preventing damaging current backflow through the device when it is powered down.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
A
7
GND
B
7
B
6
B
5
description
A
1
A
0
1
1
2
3
4
5
6
7
8
9
10
