鈥?PI74FCT151/251/2151T is pin compatible with bipolar FAST鈩?/div>
Series at a higher speed and lower power consumption
鈥?25鈩?series resistor on all outputs (FCT2xxx Only)
鈥?TTL input and output levels
鈥?Extremely low static power
鈥?Hysteresis on all inputs
鈥?Industrial operating temperature range: 鈥?0擄C to +85擄C
鈥?Packages available:
鈥?16-pin 150-mil wide plastic QSOP (Q)
鈥?16-pin 300-mil wide plastic SOIC (S)
鈥?16-pin 150-mil wide plastic SOIC (W)
Product Description:
Pericom Semiconductor鈥檚 PI74FCT series of logic circuits are pro-
duced in the Company鈥檚 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
