CY7C4282V(2003) データシートの表示（PDF） - Cypress Semiconductor

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CY7C4282V
(Rev.:2003)

64K/128K x 9 Low-Voltage Deep Sync FIFOs with Retransmit and Depth Expansion

Cypress Semiconductor 

Switching Waveforms

Write Cycle Timing

WCLK

tCLKH

tCLK

D0 –D17

WEN

FF

RCLK

tWFF

tSKEW1 [14]

tCLKL

tDS

tENS

CY7C4282V

CY7C4292V

tDH

tENH

tWFF

NO OPERATION

REN

Read Cycle Timing

RCLK

REN

tENS

EF

Q0 –Q17

OE

WCLK

tOLZ

tCLKH

tCLK

tCLKL

tENH

tREF

tA

NO OPERATION

tOE

tSKEW1 [15]

tREF

VALID DATA

tOHZ

WEN

Notes:

14. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that FF will go HIGH during the current clock cycle. If the time between the rising

edge of RCLK and the rising edge of WCLK is less than tSKEW1, then FF may not change state until the next WCLK rising edge.

15. tSKEW1 is also the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH during the current clock cycle. It the time between the

rising edge of WCLK and the rising edge of RCLK is less than tSKEW2, then EF may not change state until the next RCLK rising edge.

Document #: 38-06014 Rev. *B

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