M66257FP
Switching Characteristics
(Ta = 0 to 70°C, V
CC
= 5 V
±
10%, GND = 0 V, unless otherwise noted)
Item
Access time
Output hold time
Output enable time
Output disable time
Symbol
t
AC
t
OH
t
OEN
t
ODIS
Min
3
3
3
Typ
Max
18
18
18
Unit
ns
ns
ns
ns
Timing Conditions
(Ta = 0 to 70°C, V
CC
= 5 V
±
10%, GND = 0 V, unless otherwise noted)
Item
Write clock (WCK) cycle
Write clock (WCK) "H" pulse width
Write clock (WCK) "L" pulse width
Read clock (RCK) cycle
Read clock (RCK) "H" pulse width
Read clock (RCK) "L" pulse width
Input data setup time to WCK
Input data hold time to WCK
Reset setup time to WCK or RCK
Reset hold time to WCK or RCK
Reset nonselect setup time to WCK or RCK
Reset nonselect hold time to WCK or RCK
WE
setup time to WCK
WE
hold time to WCK
WE
nonselect setup time to WCK
WE
nonselect hold time to WCK
RE
setup time to RCK
RE
hold time to RCK
RE
nonselect setup time to RCK
RE
nonselect hold time to RCK
Input pulse rise/fall time
Data hold time*
Symbol
t
WCK
t
WCKH
t
WCKL
t
RCK
t
RCKH
t
RCKL
t
DS
t
DH
t
RESS
t
RESH
t
NRESS
t
NRESH
t
WES
t
WEH
t
NWES
t
NWEH
t
RES
t
REH
t
NRES
t
NREH
tr, tf
t
H
Min
25
11
11
25
11
11
7
3
7
3
7
3
7
3
7
3
7
3
7
3
Typ
Max
20
20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
Notes: Reset the IC after power is turned on.
*
For 1-line access, the following should be satisfied:
WE
"H" level period
<
20 ms
−
5120 t
WCK
−
WRES
"L" level period
RE
"H" level period
<
20 ms
−
5120 t
RCK
−
RRES
"L" level period
REJ03F0251-0200 Rev.2.00 Sep 14, 2007
Page 5 of 12
RENESAS [ RENESAS TECHNOLOGY CORP ]
