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PI74FCT139/239T
DUAL 1-OF-4 DECODER
PI74FCT139T
PI74FCT239T
Fast CMOS Dual 1-of-4 Decoder
Product Features
Product Description
Pericom Semiconductor聮s PI74FCT series of logic circuits are pro-
duced in the Company聮s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
These are high-speed two independent 1-of-4 decoders. Each
decoder accepts two binary weighted inputs (A
0
, A
1
) and gives
four mutually exclusive active LOW outputs (O
0
-O
3:
PI74FCT139T)
or active HIGH outputs (O0-O3: PI74FCT239T). There is one active
LOW enable (E) for each decoder. For the PI74FCT139T all outputs
are forced HIGH, and for the PI74FCT239T all outputs are forced
LOW when E is HIGH.
聲 PI74FCT139/239T 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)
Logic Block Diagram
E
a
A
0a
A
1a
E
b
A
0b
A
1b
O
0a
O
1a
O
2a
O
3a
O
0b
O
1b
O
2b
O
3b
PI74FCT139T function shown.
1
PS2006B 11/11/97
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2
3
4
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