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NX25F640C-3T

64M-BIT SERIAL FLASH MEMORY WITH 4-PIN SPI INTERFACE

NexFlash -> Winbond Electronics 

NX25F640C

AC ELECTRICAL CHARACTERISTICS (PRELIMINARY)

Symbol

tCYC

tWH

tWL

tRI

tFI

tSU

tIH

tV

tLEAD

tLAG

tWP

tXS

tHD

tCD

tCS

tRB

tDIS

tOH

Description

SCK Serial Clock Period With RCE=1

SCK Serial Clock Period With RCE=0 (1)

SCK Serial Clock High or Low Time

SCK Serial Clock Rise or Fall Time (2)

Data Input Setup Time to SCLK

Data Input Hold Time from SCLK

Data Output Valid after SCLK (1,3)

CS Setup Time to Command

CS Delay Time after Command

Erase/Write Program Time (4)

(see Write to Sector Command)

Transfer Sector

(see Transfer Command)

SCK Setup Time to HOLD

SCK Hold Time from HOLD

CS Deselect Time

READY / BUSY Valid Time

Data Output Disable Time

Data Output Hold Time After SCK

16 MHz

Min Typ Max

62 — —

77 — —

tCYC/2 — —

—— 5

20 — —

0 ——

— — 25

100 — —

100 — —

— 10 15

100 150 520

10 — —

30 — —

160 — —

160 — —

— — 160

0 ——

Unit

ns

ns

ns

ns

ns

ns

ns

ns

ns

ms

µs

ns

ns

ns

ns

ns

ns

Notes:

1. To achieve maximum clock performance, the read clock edge will need to be set for rising edge operation in the configuration

register (RCE=1).

2. Test points are 10% and 90% points for rise/fall times. All others timings are measured at 50% point.

3. With 30 pF (16 MHz) load SO to GND.

4. Maximum program time for 99% of sectors, <1% may require 4x this value.

20

NexFlash Technologies, Inc.

PRELIMINARY NXSF022F-0502

05/20/02 ©

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