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ꢉ ꢊꢋꢌ ꢅ ꢋꢍꢄ ꢄ ꢎꢏꢐ ꢑ ꢌꢒ ꢎ ꢓ ꢏꢌ ꢔ ꢎꢏ
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SCCS041B – SEPTEMBER 1994 – REVISED SEPTEMBER 2001
Q OR SO PACKAGE
(TOP VIEW)
D
D
D
D
Function and Pinout Compatible With FCT
and F Logic
25-Ω Output Series Resistors to Reduce
Transmission-Line Reflection Noise
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
V
CC
OE
A
D
D
D
D
D
D
D
D
0
1
2
3
4
5
6
7
B
Reduced V
of Equivalent FCT Functions
(Typically = 3.3 V) Versions
O
OH
0
O
O
O
O
O
O
O
1
2
3
4
5
6
7
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D
D
I
Supports Partial-Power-Down Mode
off
Operation
GND
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D
D
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
D
D
12-mA Output Sink Current
15-mA Output Source Current
3-State Outputs
description
The CY74FCT2541T is an octal buffer and line driver designed to be employed as a memory-address driver,
clock driver, and bus-oriented transmitter/receiver. On-chip termination resistors at the outputs reduce system noise
caused by reflections. The CY74FCT2541T can replace the CY74FCT541T to reduce noise in an existing design.
The speed of the CY74FCT2541T is comparable to bipolar logic counterparts, while reducing power dissipation.
Input and output voltage levels allow direct interface with TTL and CMOS devices without external components.
This device is fully specified for partial-power-down applications using I . The I circuitry disables the outputs,
off
off
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
QSOP – Q
Tape and reel
Tube
4.1
4.1
4.1
4.8
4.8
4.8
8
CY74FCT2541CTQCT
CY74FCT2541CTSOC
CY74FCT2541CTSOCT
CY74FCT2541ATQCT
CY74FCT2541ATSOC
CY74FCT2541ATSOCT
CY74FCT2541TQCT
CY74FCT2541TSOC
CY74FCT2541TSOCT
FCT2541C
SOIC – SO
QSOP – Q
FCT2541C
FCT2541A
Tape and reel
Tape and reel
Tube
–40°C to 85°C
SOIC – SO
QSOP – Q
FCT2541A
FCT2541
Tape and reel
Tape and reel
Tube
8
SOIC – SO
FCT2541
Tape and reel
8
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
availableat www.ti.com/sc/package.
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 2001, Texas Instruments Incorporated
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1
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