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PS2028A 03/11/96
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PI74FCT151/2151/251T
8-INPUT MULTIPLEXER
(25
Series) PI74FCT2151T
Logic Block Diagram
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Fast CMOS 8-Input Multiplexer
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’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.
Product Features:
PI74FCT151/251/2151T is pin compatible with bipolar FAST
Series at a higher speed and lower power consumption
25
series resistor on all outputs (FCT2xxx Only)
TTL input and output levels
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)
Z
Z
I
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
S
0
S
1
S
2
E for 151
OE for 251
FCT251 Only