CY7C421-20JXI datasheet(2/21 Pages) CYPRESS

Part #	CY7C421-20JXI

Description	512 횞 9 Asynchronous FIFO

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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2 / 21 page

CY7C421

Document Number: 38-06001 Rev. *H

Page 2 of 21

Logic Block Diagram

RAM ARRAY

512 x 9

READ

CONTROL

WRITE

CONTROL

WRITE

POINTER

RESET

LOGIC

EXPANSION

LOGIC

DATA INPUTS

(D0–D 8)

THREE-

STATE

BUFFERS

DATA OUTPUTS

(Q0–Q 8)

W

READ

POINTER

FLAG

LOGIC

R

XI

EF

FF

XO/HF

MR

FL/RT

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Manufacturer	Part #	Datasheet	Description
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CY7C421-20JXI Datasheet(PDF) 2 Page - Cypress Semiconductor

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