CY74FCT2240T Datasheet, PDF (1/6 Pages) Texas Instruments – 8-Bit Buffers/Line Drivers

Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT2240T
CY74FCT2244T
SCCS036 - September 1994 - Revised March 2000
8-Bit Buffers/Line Drivers
Features
• Function and pinout compatible with FCT and F logic
• 25Ω output series resistors to reduce transmission line
reflection noise
• FCT-C speed at 4.1 ns max. (Com’l) FCT-A speed at 4.8
ns max. (Com’l)
• TTL output level versions of equivalent FCT functions
• Edge-rate control circuitry for significantly improved
noise characteristics
• Power-off disable feature permits live insertion
• ESD > 2000V
• Fully compatible with TTL input and output logic levels
• Sink current 12 mA
Source current15 mA
• Extended commercial temp. range of –40˚C to +85˚C
• Three-state outputs
Functional Description
The FCT2240T and FCT2244T are octal buffers and line
drivers that include on-chip 25Ω terminating resistors at each
of the outputs, to minimize noise resulting from reflections or
standing waves in high-performance applications. The on-chip
resistors reduce overall board space and component count.
Designed to be employed as memory address drivers, clock
drivers, and bus-oriented transmitters/receivers, these devic-
es provide speed and drive capabilities commensurate with
their fastest bipolar logic counterparts while reducing power
dissipation. The input and output voltage levels allow direct
interface with TTL, NMOS, and CMOS devices without the
need for external components.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Logic Block Diagram FCT2240T
OE_A
DA₀
OB₀
DA₁
OE_B
OA₀
DB₀
OA₁
OB₁
DB₁
DA₂
OA₂
OB₂
DB₂
DA₃
OA₃
OB₃
DB₃
FCT2240T–2
Logic Block Diagram FCT2244T
OE_A
DA₀
OB₀
DA₁
OE _B
OA₀
DB₀
OA₁
OB₁
DB₁
DA₂
OA₂
OB₂
DB₂
DA₃
OA₃
OB₃
DB₃
FCT2240T–4
Pin Configurations
SOIC/QSOP
Top View
OE_A
DA₀
OB₀
DA₁
OB₁
DA₂
OB₂
DA₃
OB₃
GND
1
20
2
19
3
18
4
17
5 FCT2240T 16
6
15
7
14
8
13
9
12
10
11
V_CC
OE_B
OA₀
DB₀
OA₁
DB₁
OA₂
DB₂
OA₃
DB₃
FCT2240T–3
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 FCT2244T 16
6
15
7
14
8
13
9
12
10
11
V_CC
OE _B
OA₀
DB₀
OA₁
DB₁
OA₂
DB₂
OA₃
DB₃
FCT2240T–6
Copyright © 2000, Texas Instruments Incorporated