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Fast CMOS
Bus Interface Registers
Product Features
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. All
PI74FCT2XXX devices have a built-in 25-ohm series resistor on all
outputs to reduce noise because of reflections, thus eliminating the
need for an external terminating resistor.
The PI74FCT821T/2821T is a 10-bit wide register designed with ten
D-type flip-flops with a buffered common clock and buffered
3-state outputs. The PI74FCT823/2823T is a 9-bit wide register
designed with Clock Enable and Clear. The PI74FCT825T is an
8-bit wide register with all PI74FCT823T controls plus multiple
enables. When output enable (OE) is LOW, the outputs are enabled.
When OE is HIGH, the outputs are in the high impedance state. Input
data meeting the setup and hold time requirements of the D inputs
is transferred to the Y outputs on the LOW-to-HIGH transition of the
clock input.
聲 PI74FCT821T/823T/825T/2821T/2823T is pin compatible with
bipolar FAST聶 Series at a higher speed and lower power
consumption
聲 25鈩?series resistor on all outputs (FCT2XXX only)
聲 TTL input and output levels
聲 Low ground bounce outputs
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 24-pin 300 mil wide plastic DIP (P)
聳 24-pin 150 mil wide plastic QSOP (Q)
聳 24-pin 150 mil wide plastic TQSOP (R)
聳 24-pin 300 mil wide plastic SOIC (S)
聲 Device models available upon request
Logic Block Diagram
D
0
EN
D
1
D
2
D
3
D
4
D
5
D
N-1
D
N
CLR
D
CL
Q
D
CL
Q
D
CL
Q
D
CL
Q
D
CL
Q
D
CL
Q
D
CL
Q
D
CL
Q
CP Q
CP
CP Q
CP Q
CP Q
CP Q
CP Q
CP Q
CP Q
OE
Y
0
OE
1
OE
2
OE
3
PI74FCT825 Only
Y
1
Y
2
Y
3
Y
4
Y
5
Y
N-1
Y
N
1
PS2023A 03/11/96
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