CY5474FCT240T Datasheet, PDF (1/8 Pages) Texas Instruments – 8-Bit Buffers/Line Drivers

CY54/74FCT240T
CY54/74FCT244T
SCCS017 - May 1994 - Revised February 2000
Features
• Function, pinout, and drive compatible with FCT and
F logic
• FCT-D speed at 3.6 ns max. (Com’l FCT244 only),
FCT-C speed at 4.1 ns max. (Com’l),
FCT-A speed at 4.8 ns max. (Com’l)
• Reduced V_OH (typically = 3.3V) versions of equivalent
FCT functions
• Edge-rate control circuitry for significantly improved
noise characteristics
• Power-off disable feature
• ESD > 2000V
• Matched rise and fall times
• Fully compatible with TTL input and output logic levels
• Extended commercial range of −40˚C to +85˚C
8-Bit Buffers/Line Drivers
• Sink current
64 mA (Com’l), 48 mA (Mil)
Source current 32 mA (Com’l), 12 mA (Mil)
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
DA₀
OB₀
DA₁
OB₁
DA₂
OB₂
DA₃
OB₃
OE_B
OA₀
DB₀
OA₁
DB₁
OA₂
DB₂
OA₃
DB₃
FCT240T–1
FCT244T
OE_A
OE_B
DA₀
OA₀
OB₀
DB₀
DA₁
OA₁
OB₁
DA₂
OB₂
DA₃
DB₁
OA₂
DB₂
OA₃
OB₃
DB₃
FCT240T–4
Pin Configurations
LCC
Top View
OB₃
GND
DB₃
OA₃
DB₂
8 7 654
9
3
10 _{FCT240T 2}
11
1
12
20
13
19
14 1516 17 18
OB₀
DA₀
OE_A
V_CC
OE_B
FCT240T–2
DIP/SOIC/QSOP
Top View
OE_A
DA₀
OB₀
DA₁
OB₁
DA₂
OB₂
DA₃
OB₃
GND
1
20
2
19
3
18
4
17
5 FCT240T 16
6
15
7
14
8
13
9
12
10
11
V_CC
OE_B
OA₀
DB₀
OA₁
DB₁
OA₂
DB₂
OA₃
DB₃
FCT240T–3
LCC
Top View
OB₃
GND
DB₃
OA₃
DB₂
8 7 654
9
3
10
2
11 ^FCT244T 1
12
20
13
19
14 1516 17 18
OB₀
DA₀
OE_A
V_CC
OE_B
FCT240T–5
DIP/SOIC/QSOP
Top View
OE_A
DA₀
OB₀
DA₁
OB₁
DA₂
OB₂
DA₃
OB₃
GND
1
20
2
19
3
18
4
17
5 FCT244T 16
6
15
7
14
8
13
9
12
10
11
V_CC
OE_B
OA₀
DB₀
OA₁
DB₁
OA₂
DB₂
OA₃
DB₃
FCT240T–6
Copyright © 2000, Texas Instruments Incorporated