PI74FCT16240/162240/162H240T
PI74FCT16240T
16-BIT BUFFER/LINE DRIVERS
PI74FCT162240T
PI74FCT162H240T
Fast CMOS 16-Bit
Buffer/Line Drivers
ProductFeatures:
Product Description:
Pericom Semiconductors PI74FCT series of logic circuits are pro-
duced in the Companys advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
PI74FCT16240T,PI74FCT162240T,andPI74FCT162H240T
are high-speed,
low power devices with high current drive
VCC =5V±10%
Hysteresis on all inputs
Packagesavailable:
ThePI74FCT16240T,PI74FCT162240T,andPI74FCT162H240T
are inverting 16-bit buffer/line drivers designed for applications
driving high capacitance loads and low impedance backplanes.
Thesehigh-speed,lowpowerdevicesofferbus/backplaneinterface
capabilityandaflow-throughorganizationforeaseofboardlayout.
These devices are designed with three-state controls to operate in
a Quad-Nibble, Dual-Byte, or a single 16-bit word mode.
48-pin240milwideplasticTSSOP(A)
48-pin300milwideplasticSSOP(V)
High output drive: IOH = 32 mA; IOL = 64 mA
Power off disable outputs permit "live insertion"
Typical VOLP (Output Ground Bounce) < 1.0V
atVCC =5V,TA =25°C
The PI74FCT16240T output buffers are designed with a Power-
Off disable allowing live insertion of boards when used as
backplane drivers.
The PI74FCT162240T has ±24 mA balanced output drivers. It is
designed with current limiting resistors at its outputs to control the
output edge rate resulting in lower ground bounce and undershoot.
This eliminates the need for external terminating resistors for most
interface applications.
Balanced output drivers: ±24 mA
Reduced system switching noise
Typical VOLP (Output Ground Bounce) < 0.6V
atVCC =5V,TA =25°C
The PI74FCT162H240T has Bus Hold which retains the input's
last state whenever the input goes to high-impedance preventing
floatinginputsandeliminatingtheneedforpull-up/downresistors.
Bus Hold retains last active bus state during 3-state
Eliminates the need for external pull-up resistors
Logic Block Diagram
1OE
3OE
1A
1A
1A
1A
0
1
2
3
1
1
1
1
Y
Y
Y
Y
0
1
2
3
3
3
3
3
A
A
A
A
0
1
2
3
3
3
3
3
Y
Y
Y
Y
0
1
2
3
2OE
4OE
2A
2A
2A
2A
0
1
2
3
2
2
2
2
Y
Y
Y
Y
0
1
2
3
4
4
4
4
A
A
A
A
0
1
2
3
4
4
4
4
Y
Y
Y
Y
0
1
2
3
PS2030A 03/11/96
1