CY54FCT240T, CY74FCT240T
8-BIT BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS

SCCS017A – MAY 1994 – REVISED OCTOBER 2001
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 Function, Pinout, and Drive Compatible
With FCT and F Logic
C0068 Reduced V
OH
(Typically = 3.3 V) Versions
of Equivalent FCT Functions
C0068 Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
C0068 I
off
Supports Partial-Power-Down Mode
Operation
C0068 ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
C0068 Matched Rise and Fall Times
C0068 Fully Compatible With TTL Input and
Output Logic Levels
C0068 CY54FCT240T
– 48-mA Output Sink Current
12-mA Output Source Current
C0068 CY74FCT240T
– 64-mA Output Sink Current
32-mA Output Source Current
C0068 3-State Outputs
description
The ’FCT240T 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.
Copyright  2001, Texas Instruments Incorporated
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.

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.
CY54FCT240T ...L PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
A
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
GND
V
CC
OE
B
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
CY54FCT240T ...D PACKAGE
CY74FCT240T ...Q OR SO PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
OA
0
DB
0
OA
1
DB
1
OA
2
OB DA OE
OA DB
V OE
OB
GND
DB
CC
DA
1
OB
1
DA
2
OB
2
DA
3
0 0 A B
3 3 3 2
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.