M66256FP Ver la hoja de datos (PDF) - Renesas Electronics
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M66256FP Datasheet PDF : 14 Pages
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M66256FP
Switching Characteristics
Item
Access time
Output hold time
Output enable time
Output disable time
Symbol
tAC
tOH
tOEN
tODIS
(Ta = 0 to 70°C, VCC = 5 V ± 10%, GND = 0 V)
Min
Typ
Max
Unit


18
ns
3


ns
3

18
ns
3

18
ns
Timing Conditions
(Ta = 0 to 70°C, VCC = 5 V ± 10%, GND = 0 V, unless otherwise noted)
Item
Symbol
Min
Typ
Max
Unit
Write clock (WCK) cycle
tWCK
25


ns
Write clock (WCK) "H" pulse width
tWCKH
11


ns
Write clock (WCK) "L" pulse width
tWCKL
11


ns
Read clock (RCK) cycle
tRCK
25


ns
Read clock (RCK) "H" pulse width
tRCKH
11


ns
Read clock (RCK) "L" pulse width
tRCKL
11


ns
Input data setup time to WCK
tDS
7


ns
Input data hold time to WCK
tDH
3


ns
Reset setup time to WCK or RCK
tRESS
7


ns
Reset hold time to WCK or RCK
tRESH
3


ns
Reset nonselect setup time to WCK or RCK tNRESS
7


ns
Reset nonselect hold time to WCK or RCK tNRESH
3


ns
WE setup time to WCK
WE hold time to WCK
tWES
tWEH
7


ns
3


ns
WE nonselect setup time to WCK
tNWES
7


ns
WE nonselect hold time to WCK
tNWEH
3


ns
RE setup time to RCK
RE hold time to RCK
tRES
7


ns
tREH
3


ns
RE nonselect setup time to RCK
tNRES
7


ns
RE nonselect hold time to RCK
tNREH
3


ns
Input pulse rise/fall time
tr, tf


20
ns
Data hold time*
tH


20
ms
Notes: Perform reset operation after turning on power supply.
* For 1-line access, the following should be satisfied:
WE "H" level period ≤ 20 ms − 5120 tWCK − WRES "L" level period
RE "H" level period ≤ 20 ms − 5120 tRCK − RRES "L" level period
REJ03F0250-0200 Rev.2.00 Sep 14, 2007
Page 4 of 13
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