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PI74ALVCH162820 Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

Part No. PI74ALVCH162820
Description  3.3V 10-Bit Flip-Flop with Dual Outputs and 3-State Outputs
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Maker  PERICOM [Pericom Semiconductor Corporation]
Homepage  http://www.pericom.com
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PI74ALVCH162820 Datasheet(HTML) 1 Page - Pericom Semiconductor Corporation

   
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PS8094A 03/26/97
Product Description
Pericom Semiconductor’s PI74ALVCH series of logic circuits are
produced in the Company’s advanced 0.5 micron CMOS technology,
achieving industry leading speed.
ThePI74ALVCH162820isa10-bitflip-flopdesignedfor2.3Vto3.3V
VCC operation. The PI74ALVCH162820 is designed with edge-
triggered D-type flip-flops. On the positive transition of clock (CLK)
input, the device provides true data at the Q outputs.
A buffered output-enable (OE) input can be used to place the ten
outputs in either a normal logic state (HIGH or LOW level) or a high-
impedance state. In the high-impedance state, the outputs neither
load nor drive the bus lines significantly. The high-impedance state
and increased drive provide the capacity to drive bus lines without
the need for interface or pullup components. OE does not affect the
internal operation of the flip-flops. Old data can be retained or new
data can be entered while the outputs are in the high-impedance
state.
The outputs, which are designed to sink up to 12mA, include
26
Ω resistors to reduce overshoot and undershoot.
The PI74ALVCH162820 has “Bus Hold” which retains the data
input’s last state whenever the data input goes to high-impedance
preventing “floating” inputs and eliminating the need for pullup/
down resistors.
Active bus-hold circuitry is provided to hold unused or floating
data inputs at a valid logic level.
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PI74ALVCH162820
3.3V 10-Bit Flip-Flop with Dual Outputs
and 3-State Outputs
Logic Block Diagram
Product Features
• PI74ALVCH162820isdesignedforlowvoltageoperation
• VCC=2.3Vto3.6V
• Hysteresis on all inputs
• Typical VOLP (Output Ground Bounce)
< 0.8V at VCC = 3.3V, TA = 25°C
• Typical VOHV (Output VOH Undershoot)
< 2.0V at VCC = 3.3V, TA = 25°C
• Output ports have equivalent 26Ω series resistors,
no external resistors are required.
• Bus Hold retains last active bus state during 3-state
eliminates the need for external pullup resistors
• Industrial operation at –40°C to +85°C
• Packagesavailable:
– 56-pin 240 mil wide plastic TSSOP (A)
– 56-pin 300 mil wide plastic SSOP (V)


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