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PI74FCT821T Datasheet

  • PI74FCT821T

  • Logic | 10-Bit Interface Register (3-State)

  • 7頁

  • ETC

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(25鈩?Series) PI74FCT2821T/2823T
鈩?/div>
Fast CMOS
Bus Interface Registers
PI74FCT821T/823T/825T
鈩?/div>
(25鈩?Series) P174FCT2821T/2823T
BUS INTERFACE REGISTERS
PI74FCT821T/823T/825T
Product Features:
鈥?PI74FCT821T/823T/825T/2821T/2823T is pin compatible with
bipolar FAST鈩?Series at a higher speed and lower power
consumption
鈥?25鈩?series resistor on all outputs (FCT2XXX only)
鈥?TTL input and output levels
鈥?Low ground bounce outputs
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?24-pin 300 mil wide plastic DIP (P)
鈥?24-pin 150 mil wide plastic QSOP (Q)
鈥?24-pin 150 mil wide plastic TQSOP (R)
鈥?24-pin 300 mil wide plastic SOIC (S)
鈥?Device models available upon request
Product Description:
Pericom Semiconductor鈥檚 PI74FCT series of logic circuits are
produced in the Company鈥檚 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.
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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