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CY74FCT244TLCC Datasheet

  • CY74FCT244TLCC

  • 8-Bit Buffers/Line Drivers

  • 8頁

  • TI

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CY54/74FCT240T
CY54/74FCT244T
SCCS017 - May 1994 - Revised February 2000
8-Bit Buffers/Line Drivers
鈥?Sink current
Source current
64 mA (Com鈥檒), 48 mA (Mil)
32 mA (Com鈥檒), 12 mA (Mil)
Features
鈥?/div>
Function, pinout, and drive compatible with FCT and
F logic
鈥?/div>
FCT-D speed at 3.6 ns max. (Com鈥檒 FCT244 only),
FCT-C speed at 4.1 ns max. (Com鈥檒),
FCT-A speed at 4.8 ns max. (Com鈥檒)
鈥?/div>
Reduced V
OH
(typically = 3.3V) versions of equivalent
FCT functions
鈥?/div>
Edge-rate control circuitry for signi鏗乧antly improved
noise characteristics
鈥?/div>
Power-off disable feature
鈥?/div>
ESD > 2000V
鈥?/div>
Matched rise and fall times
鈥?/div>
Fully compatible with TTL input and output logic levels
鈥?/div>
Extended commercial range of
鈭?0藲C
to +85藲C
Functional Description
The FCT240T and FCT244T are octal buffers and line drivers
designed to be employed as memory address drivers, clock
drivers, and bus-oriented transmitters/receivers. The 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.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Logic Block Diagram
FCT240T
OE
A
OE
B
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
FCT240T鈥?
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
OE
A
OE
B
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
FCT240T鈥?
FCT244T
Pin Configurations
LCC
Top View
DA3
OB 2
DA2
OB 1
DA1
DIP/SOIC/QSOP
Top View
OE
A
DA
0
OB
0
3
2
1
20
19
OB
0
DA
0
OE
A
V
CC
OE
B
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
GND
FCT240T鈥?
1
2
3
4
20
19
18
17
V
CC
OE
B
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
FCT240T鈥?
OB
3
GND
DB
3
OA
3
DB
2
9
10
11
12
13
LCC
Top View
DA3
OB 2
DA2
OB 1
DA1
DIP/SOIC/QSOP
Top View
OE
A
DA
0
OB
0
3
2
1
20
19
OB
0
DA
0
OE
A
V
CC
OE
B
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
GND
1
2
3
4
20
19
18
17
V
CC
OE
B
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
8
OB
3
GND
DB
3
OA
3
DB
2
9
10
11
12
13
7 6 5 4
FCT240T
8
7 6 5 4
5 FCT240T 16
6
7
8
9
10
15
14
13
12
11
5 FCT244T 16
6
7
8
9
10
15
14
13
12
11
FCT244T
14 1516 17 18
OA2
DB 1
OA1
DB 0
OA0
14 1516 17 18
OA2
DB1
OA1
DB0
OA0
FCT240T鈥?
FCT240T鈥?
Copyright
漏
2000, Texas Instruments Incorporated

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