庐
FAST CMOS OCTAL
BUFFER/LINE DRIVER
Integrated Device Technology, Inc.
IDT54/74FCT240/A/C
IDT54/74FCT241/A/C
IDT54/74FCT244/A/C
IDT54/74FCT540/A/C
IDT54/74FCT541/A/C
FEATURES:
鈥?IDT54/74FCT240/241/244/540/541 equivalent to FAST
speed and drive
鈥?IDT54/74FCT240A/241A/244A/540A/541A 25% faster
than FAST
鈥?IDT54/74FCT240C/241C/244C/540C/541C up to 55%
faster than FAST
鈥?I
OL
= 64mA (commercial) and 48mA (military)
鈥?CMOS power levels (1mW typ. static)
鈥?Product available in Radiation Tolerant and Radiation
Enhanced versions
鈥?Military product compliant to MIL-STD-883, Class B
鈥?Meets or exceeds JEDEC Standard 18 specifications
TM
DESCRIPTION:
The IDT octal buffer/line drivers are built using an advanced
dual metal CMOS technology. The IDT54/74FCT240/A/C,
IDT54/74FCT241/A/C and IDT54/74FCT244/A/C are designed
to be employed as memory and address drivers, clock drivers
and bus-oriented transmitter/receivers which provide improved
board density.
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
arrangement makes these devices especially useful as output
ports for microprocessors and as backplane drivers, allowing
ease of layout and greater board density.
FUNCTIONAL BLOCK DIAGRAMS
2529 cnv* 01鈥?3
OE
A
OE
B
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
IDT54/74FCT240
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
IDT54/74FCT241/244
*OE
B
for 241, OE
B
for 244
OE
A
241 Only
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
IDT54/74FCT540/541
*Logic diagram shown for 'FCT540.
'FCT541 is the non-inverting option.
2606 dwg 01鈥?3
OE
A
OE
B
O
0
*
O
1
*
O
2
*
O
3
*
O
4
*
O
5
*
O
6
*
O
7
*
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
漏1992
Integrated Device Technology, Inc.
MAY 1992
DSC-4610/3
7.8
1
1
2
3
4
5
6
7
8
