PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
Ω
Quad 2-Input Multiplexer
PI74FCT157T/257T
Ω
(25Ω Series)PI74FCT2157T/2257T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Fast CMOS
Quad 2-Input Multiplexer
Product Features:
Product Description:
PI74FCT157/257/2157/2257T is pin compatible with bipolar
FAST Series at a higher speed and lower power
consumption
25Ω series resistor on all outputs (FCT2XXX only)
TTL input and output levels
Low ground bounce outputs (25Ω series only)
Extremely low static power
Hysteresis on all inputs
Industrial operating temperature range: 40°C to +85°C
Packages available:
16-pin 150 mil wide plastic QSOP (Q)
16-pin 300 mil wide plastic SOIC (S)
16-pin 150 mil wide plastic SOIC (W)
Pericom Semiconductors PI74FCT series of logic circuits are produced in the Companys advanced 0.8 micron CMOS technology,
achieving industry leading speed grades. All PI74FCT2XXX devices
have a built-in 25-ohm series resistor on all outputs to reduce noise
because of reflections, thus eliminating the need for an external
terminating resistor.
The PI74FCT157T/257T and PI74FCT2157T/2257T are highspeed quad 2-input multiplexers. The common select input can be
used to select four bits of data from two sources. The four buffered
outputs present the selected data in the true (non-inverting) form.
The PI74FCT157T/2157T has a common, active-LOW, Enable
input (E). When E is inactive, all four outputs are held LOW. The
PI74FCT157T/2157T can generate any four of the 16 different
funtions of two variables with one common variable. The
PI74FCT157T/2157T can be used as a function generator or to
move data from two different groups of registers to a common bus.
The PI74FCT257/2257T has a common Output Enable (OE) input.
When OE is HIGH, all outputs are switched to a high-impedance
state allowing the outputs to interface directly with bus-oriented
systems.
Logic Block Diagram
S
157
ONLY
3 OTHER MULTIPLEXERS
E
I1B-I1D
ZB-ZD
I0B-I0D
I1A
ZA
I0A
257
ONLY
OE
1
PS2010A
06/20/02
