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PI74FCT162Q374TA

Fast Low Noise CMOS 16-Bit Registers (3-State)

Pericom Semiconductor 

PI74FCT162Q374T

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Fast Low Noise CMOS 16-Bit

Registers (3-State)

Product Features:

• VCC=5V±10%

• Balanced output drivers:

±12 mA

• Output impedance:

35Ω (typical)

• Typical VOLP (Output Ground Bounce) < 0.5V

at VCC = 5V, TA = 25°C

• Bus Hold retains last active bus state during tri-state

• Hysteresis on all inputs

• Packages available:

– 48-pin 240 mil wide plastic TSSOP (A)

– 48-pin 300 mil wide plastic SSOP (V)

– 48-pin 150 mil wide plastic BQSOP (B)

• Device models available on request

Product Description:

Pericom Semiconductor’s PI74FCT series of logic circuits are pro-

duced in the Company’s advanced 0.6 micron CMOS technology,

achieving industry leading speed grades.

The PI74FCT162Q374T is a 16-bit octal register designed with 16

D-type flip-flops with a buffered common clock and 3-state outputs.

The Output Enable (xOE) and clock (xCLK) controls are organized

to operate as two 8-bit registers or one 16-bit register. 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 xOx outputs on the LOW-to-HIGH transition of

the clock input.

The PI74FCT162Q374T is designed with current limiting resistors

at its outputs to control the output edge rate resulting in lower

ground bounce and undershoot. This device features a typical

output impedance of 35Ω eliminating the need for external

terminating resistors for most bus interface applications. This noise

suppression benefit is designated by the letter "Q" (for quiet) in the

part number.

The PI74FCT162Q374T has "Bus Hold" which retains the input's

last state whenever the input goes to high-impedance preventing

"floating" inputs and eliminating the need for pull-up/down resistors.

Logic Block Diagram

1OE

2OE

1CLK

2CLK

1D0

D

2D0

D

1O0

2O0

C

C

TO 7 OTHER CHANNELS

TO 7 OTHER CHANNELS

1

PS2082D 06/08/98

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