CY54FCT240T, CY74FCT240T
8-BIT BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCCS017A 鈥?MAY 1994 鈥?REVISED OCTOBER 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
CY54FCT240T
鈥?48-mA Output Sink Current
12-mA Output Source Current
CY74FCT240T
鈥?64-mA Output Sink Current
32-mA Output Source Current
3-State Outputs
CY54FCT240T . . . D PACKAGE
CY74FCT240T . . . Q OR SO PACKAGE
(TOP VIEW)
OE
A
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
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
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
CY54FCT240T . . . L PACKAGE
(TOP VIEW)
OB
0
DA
0
OE
A
V
CC
OE
B
DA
1
OB
1
DA
2
OB
2
DA
3
3
4
5
6
7
8
2 1 20 19
18
17
16
15
14
9 10 11 12 13
OA
0
DB
0
OA
1
DB
1
OA
2
description
The 鈥橣CT240T devices are octal buffers and line
drivers designed to be employed as memory
address
drivers,
clock
drivers,
and
bus-oriented transmitters/receivers. These devices provide speed and drive capabilities equivalent to their
fastest bipolar logic counterparts, while reducing power consumption. The input and output voltage levels allow
direct interface with TTL, NMOS, and CMOS devices without external components.
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
铮?/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
OB
3
GND
DB
3
OA
3
DB
2
1
1
2
3
4
5
6
7
8
9
10
11
