IDT54/74FCT240/A/C
IDT54/74FCT241/A/C
IDT54/74FCT244/A/C
IDT54/74FCT540/A/C
IDT54/74FCT541/A/C
FAST CMOS OCTAL
BUFFER/LINE DRIVER
Integrated Device Technology, Inc.
FEATURES:
• IDT54/74FCT240/241/244/540/541 equivalent to FAST
speed and drive
• IDT54/74FCT240A/241A/244A/540A/541A 25% faster
than FAST
DESCRIPTION:
TM
TheIDToctalbuffer/linedriversarebuiltusinganadvanced
dual metal CMOS technology. The IDT54/74FCT240/A/C,
IDT54/74FCT241/A/CandIDT54/74FCT244/A/Caredesigned
to be employed as memory and address drivers, clock drivers
andbus-orientedtransmitter/receiverswhichprovideimproved
board density.
• IDT54/74FCT240C/241C/244C/540C/541C up to 55%
faster than FAST
• IOL = 64mA (commercial) and 48mA (military)
• CMOS power levels (1mW typ. static)
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
• Meets or exceeds JEDEC Standard 18 specifications
The IDT54/74FCT540/A/C and IDT54/74FCT541/A/C are
similar in function to the IDT54/74FCT240/A/C and IDT54/
74FCT244/A/C, respectively, except that the inputs and out-
puts are on opposite sides of the package. This pinout
arrangementmakesthesedevicesespeciallyusefulasoutput
ports for microprocessors and as backplane drivers, allowing
ease of layout and greater board density.
FUNCTIONAL BLOCK DIAGRAMS
2529 cnv* 01–03
241 Only
OEA
OE
A
OE
A
OEB
OE
OA
B
0
OE
OA
DB
B
*
DA
OB
DA
OB
DA
OB
0
DA
OB
DA
0
0
D
D
D
D
D
D
D
D
0
1
O
O
O
0
*
1
*
*
*
*
*
*
*
0
DB
0
0
0
2
3
4
5
6
7
2
3
4
5
6
7
1
1
OA
DB
1
OA1
1
DB1
1
OB
DA
OB
1
O
O
O
O
O
2
2
OA
DB
2
OA2
2
2
2
DB2
DA3
DA3
OA
DB
3
OA3
OB3
3
OB
3
DB3
IDT54/74FCT240
IDT54/74FCT241/244
*OE for 241, OE for 244
IDT54/74FCT540/541
*Logic diagram shown for 'FCT540.
B
B
'FCT541 is the non-inverting option.
2606 dwg 01–03
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
MAY 1992
1992 Integrated Device Technology, Inc.
7.8
DSC-4610/3
1