PI74FCT138/PI74FCT238T
1-of-8 Decoder
PI74FCT138T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT238T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Fast CMOS 1-of-8 Decoder
Product Features
Product Description
PI74FCT138/238T is pin compatible with bipolar FAST
Series at a higher speed and lower power consumption
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)
Pericom Semiconductors PI74FCT series of logic circuits are
produced using the Companys advanced 0.8 micron CMOS
technology, achieving industry leading speed grades.
These high-speed decoders accept three binary weighted inputs
(A0, A1, A2) and gives eight mutually exclusive active LOW outputs
(O0-O7: PI74FCT138T) or active HIGH outputs (O0-O7: PI74FCT238T)
when enabled. These devices contain three enable inputs, two
active LOW (E1, E2) and one active HIGH (E3). On the PI74FCT138T
all outputs will be HIGH and on the PI74FCT238T all outputs will be
LOW, except when E1 and E2 are LOW and E3 is HIGH.
Logic Block Diagram
A2
A1
O7
A0
O6
E1 E2 E3
O5
O4
O3
O2
O1
O0
PI74FCT138T function shown.
1
PS2004A
06/19/02
