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PS2028A 03/11/96

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PI74FCT151/2151/251T

8-INPUT MULTIPLEXER

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

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

Ω 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)

PI74FCT151T

PI74FCT251T

(25

Ω

Ω

Ω

Ω

Ω Series) PI74FCT2151T

Z

Z

E for 151

OE for 251

FCT251 Only