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Fast CMOS 8-Input Multiplexer
聲 PI74FCT151/251/2151T is pin compatible with bipolar FAST聶
Series at a higher speed and lower power consumption
聲 25鈩?series resistor on all outputs (FCT2xxx Only)
聲 TTL input and output levels
聲 Extremely low static power
聲 Hysteresis on all inputs
聲 Industrial operating temperature range: 聳40擄C to +85擄C
聲 Packages available:
聳 16-pin 150-mil wide plastic QSOP (Q)
聳 16-pin 300-mil wide plastic SOIC (S)
聳 16-pin 150-mil wide plastic SOIC (W)
Product Features
Product Description
Pericom Semiconductor聮s PI74FCT series of logic circuits are pro-
duced in the Company聮s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT151T, PI74FCT251T, and PI74FCT2151T are high-
speed 8-input multiplexers. They select one bit from a source of eight
under the control of three select inputs. Both assertion and negation
outputs are provided.
The PI74FCT151/2151T has a common, active-LOW, Enable input
(E). When E is LOW, data from one of eight inputs is directed to the
complementary outputs based on the 3-bit code applied to the Select
(S
0
-S
2
) inputs. The PI74FCT151/2151T can be used as a data routing
device from one of eight sources.
The PI74FCT251T has a common Active-LOW Output Enable (OE)
input. When OE is LOW, data from one of eight inputs is directed to
the complementary outputs. When OE is HIGH, both outputs are
switched to a high-impedance state allowing multiplexer expansion
by tying several outputs together.
Logic Block Diagram
I
7
I
6
I
5
Z
I
4
Z
I
3
I
2
I
1
I
0
FCT251 Only
S
2
S
1
S
0
E for 151
OE for 251
1
PS2028A 03/11/96
1
2
3
4
5
