21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
鈥?PI74FCT139/239T is pin compatible with bipolar FAST鈩?/div>
Series at a higher speed and lower power consumption
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.
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.
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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3
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