SEP01G72J2BF1SA-37R Datasheet, PDF (10/14 Pages) List of Unclassifed Manufacturers – 1GB DDR2 . SDRAM registered DIMM

Data Sheet
Rev.1.0 20.11.2010
DDR2 SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND RECOMMENDED
AC OPERATING CONDITIONS (Continued)
(0°C ≤ TCASE ≤ + 85°C; VDDQ = +1.8V ± 0.1V, VDD = +1.8V ± 0.1V)
AC CHARACTERISTICS
5300-555
PARAMETER
SYMBOL MIN MAX
Address and control input hold t_IH
time
0.275
CAS# to CAS# command delay t_CCD
2
ACTIVE to ACTIVE (same
t_RC
60
bank) command period
ACTIVE bank a to ACTIVE
t_RRD
7.5
bank b command
ACTIVE to READ or WRITE
t_RCD
15
delay
Four bank Activate period
t_FAW
37.5
ACTIVE to PRECHARGE
t_RAS
45 70’000
command
Internal READ to precharge
t_RTP
7.5
command delay
Write recovery time
t_WR
Auto precharge write recovery t_DAL
+ precharge time
15
tWR + tRP
Internal WRITE to READ
command delay
t_WTR
7.5
PRECHARGE command period t_RP
15
PRECHARGE ALL command t_RPA
period
tRP + tCK
LOAD MODE command cycle t_MRD
2
time
CKE low to CK, CK#
uncertainty
t_DELAY
tIS + tCK + tIH
REFRESH to ACTIVE or
REFRESH to REFRESH
t_RFC
127.5
command interval
Average periodic refresh
interval
t_REFI
7.8
(0°C<= T_CASE <= 85 °C)
(85°C<= T_CASE <= 95 °C)
t_REFI
3.9
Exit SELF REFRESH to non-
READ command
t_XSNR
tRFC(min)
+ 10
Exit SELF REFRESH to READ t_XSRD
200
command
Exit SELF REFRESH timing
t_ISXR
tIS
reference
ODT turn-on delay
ODT turn-on
t_AOND
t_AON
2
tAC(min)
2
tAC(max)
+ 0.7
ODT turn-off delay
ODT turn-off
t_AOFD
t_AOF
2.5
tAC(min)
2.5
tAC(max)
+ 600
ODT turn-on (power-down
mode)
t_AONPD
tAC(min)
+ 2,000
2 x tCK +
tAC(max)
+ 1,000
ODT turn-off (power-down
mode)
t_AOFPD
tAC(min)
+ 2,000
2.5 x tCK
+
tAC(max)
+ 1,000
ODT to power-down entry
t_ANPD
3
latency
4200-444
MIN MAX
0.5
2
55
7.5
15
37.5
45 70,000
7.5
15
tWR + tRP
7.5
15
tRP + tCK
2
tIS + tCK + tIH
127.5
7.8
3.9
tRFC(min)
+ 10
200
tIS
2
tAC(min)
2.5
tAC(min)
tAC(min)
+ 2,000
tAC(min)
+ 2,000
3
2
tAC(max)
+ 1,000
2.5
tAC(max)
+ 600
2 x tCK +
tAC(max)
+ 1,000
2.5 x tCK
+
tAC(max)
+ 1,000
Unit
ns
tCK
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tCK
tCK
ns
µs
µs
ns
tCK
ps
tCK
ps
tCK
ps
ps
ps
tCK
Swissbit AG
Industriestrasse 4
CH – 9552 Bronschhofen
Fon: [phone]
Fax: [phone]
www.swissbit.com
eMail: [e-mail]
Page 10
of 14