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
IDT54/74FCT244T/AT/CT/DT - 2244T/AT/CT
IDT54/74FCT540T/AT/CT
IDT54/74FCT541/2541T/AT/CT
DRIVERS
Integrated Device Technology, Inc.
FEATURES:
• Common features:
– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
DESCRIPTION:
TheIDToctalbuffer/linedriversarebuiltusinganadvanced
dual metal CMOS technology. The FCT240T/FCT2240T and
FCT244T/FCT2244Taredesignedtobeemployedasmemory
and address drivers, clock drivers and bus-oriented transmit-
ter/receivers which provide improved board density.
The FCT540T and FCT541T/FCT2541T are similar in
functiontotheFCT240T/FCT2240TandFCT244T/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-
cessorsandasbackplanedrivers, allowingeaseoflayoutand
greater board density.
TheFCT2240T, FCT2244TandFCT2541Thavebalanced
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.
– VOL = 0.3V (typ.)
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT240T/FCT244T/FCT540T/FCT541T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)
• Features for FCT2240T/FCT2244T/FCT2541T:
– Std., A and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
FUNCTIONAL BLOCK DIAGRAMS
OEB
OEA
OEA
OEA
OEB
OEB
OA0
DB0
DA0
OB0
DA1
OB1
OA0
DB0
OA1
DB1
D0
D1
O0
O1
DA0
OB0
DA1
OB1
D2
D3
D4
D5
D6
D7
O2
OA1
DB1
O3
O4
O5
O6
O7
DA2
OA2
DB2
OA3
DB3
DA2
OB2
OA2
DB2
OB2
DA3
DA3
OB3
OA3
DB3
OB3
FCT240/2240T
FCT540/541/2541T
FCT244/2244T
*Logic diagram shown for 'FCT540.
'FCT541/2541T is the non-inverting option.
2565 drw 01
2565 drw 03
2565 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DECEMBER 1995
1996 Integrated Device Technology, Inc.
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6.8
DSC-2565/6
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