21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT138/PI74FCT238T
1-of-8 Decoder
PI74FCT138T
PI74FCT238T
Fast CMOS 1-of-8 Decoder
Product Features
聲 PI74FCT138/238T is pin compatible with bipolar FAST聶
Series at a higher speed and lower power consumption
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 Description
Pericom Semiconductor聮s PI74FCT series of logic circuits are
produced using the Company聮s advanced 0.8 micron CMOS
technology, achieving industry leading speed grades.
These high-speed decoders accept three binary weighted inputs
(A
0
, A
1
, A
2
) and gives eight mutually exclusive active LOW outputs
(O
0
-O
7:
PI74FCT138T) or active HIGH outputs (O0-O7:
PI74FCT238T) when enabled. These devices contain three enable
inputs, two active LOW (E
1
, E
2
) and one active HIGH (E
3
). On the
PI74FCT138T all outputs will be HIGH and on the PI74FCT238T all
outputs will be LOW, except when E
1
and E
2
are LOW and E
3
is
HIGH.
Logic Block Diagram
A
2
A
1
A
0
E
1
E
2
E
3
O
7
O
6
O
5
O
4
O
3
O
2
O
1
O
0
PI74FCT138T function shown.
1
PS2004A 03/09/96
1
2
3
4
5
6
