IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT240T/AT/CT/DT - 2240T/AT/CT
FAST CMOS OCTAL
BUFFER/LINE
DRIVERS
IDT54/74FCT244T/AT/CT/DT - 2244T/AT/CT
IDT54/74FCT540T/AT/CT
IDT54/74FCT541/2541T/AT/CT
Integrated Device Technology, Inc.
FEATURES:
鈥?Common features:
鈥?Low input and output leakage
鈮?碌A
(max.)
鈥?CMOS power levels
鈥?True TTL input and output compatibility
鈥?V
OH
= 3.3V (typ.)
鈥?V
OL
= 0.3V (typ.)
鈥?Meets or exceeds JEDEC standard 18 specifications
鈥?Product available in Radiation Tolerant and Radiation
Enhanced versions
鈥?Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
鈥?Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
鈥?Features for FCT240T/FCT244T/FCT540T/FCT541T:
鈥?Std., A, C and D speed grades
鈥?High drive outputs (-15mA I
OH
, 64mA I
OL
)
鈥?Features for FCT2240T/FCT2244T/FCT2541T:
鈥?Std., A and C speed grades
鈥?Resistor outputs (-15mA I
OH
, 12mA I
OL
Com.)
(-12mA I
OH
, 12mA I
OL
Mil.)
鈥?Reduced system switching noise
DESCRIPTION:
The IDT octal buffer/line drivers are built using an advanced
dual metal CMOS technology. The FCT240T/FCT2240T and
FCT244T/FCT2244T are designed to be employed as memory
and address drivers, clock drivers and bus-oriented transmit-
ter/receivers which provide improved board density.
The FCT540T and FCT541T/FCT2541T are similar in
function to the FCT240T/FCT2240T and FCT244T/FCT2244T,
respectively, except that the inputs and outputs are on oppo-
site sides of the package. This pinout arrangement makes
these devices especially useful as output ports for micropro-
cessors and as backplane drivers, allowing ease of layout and
greater board density.
The FCT2240T, FCT2244T and FCT2541T have balanced
output drive with current limiting resistors. This offers low
ground bounce, minimal undershoot and controlled output fall
times-reducing the need for external series terminating resis-
tors. FCT2xxxT parts are plug-in replacements for FCTxxxT
parts.
FUNCTIONAL BLOCK DIAGRAMS
OE
A
OE
B
DA
0
OE
A
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
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
OE
B
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
OA
0
DB
0
OB
0
DA
1
OA
1
DB
1
OB
1
DA
2
OA
2
DB
2
OB
2
DA
3
OB
3
OA
3
DB
3
FCT240/2240T
FCT244/2244T
FCT540/541/2541T
*Logic diagram shown for 'FCT540.
'FCT541/2541T is the non-inverting option.
2565 drw 01
2565 drw 02
2565 drw 03
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
漏1996
Integrated Device Technology, Inc.
DECEMBER 1995
DSC-2565/6
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