EBE10UE8ACWB Datasheet, PDF (18/29 Pages) Elpida Memory – 1GB Unbuffered DDR2 SDRAM DIMM

EBE10UE8ACWB
Speed bin
Parameter
Symbol
DQS falling edge hold time from
CK
Mode register set command cycle
time
tDSH
tMRD
Write postamble
tWPST
-8E
DDR2-800 (5-5-5)
min.
max.
0.2

2

0.4
0.6
Write preamble
tWPRE 0.35

Address and control input hold time tIH (base) 250

Address and control input setup
time
tIS (base) 175

Read preamble
tRPRE 0.9
1.1
Read postamble
tRPST 0.4
0.6
Active to precharge command
tRAS 45
70000
Active to auto-precharge delay
Active bank A to active bank B
command period
tRAP
tRRD
tRCD min. 
7.5

Four active window period
tFAW 35

/CAS to /CAS command delay
tCCD 2

Write recovery time
Auto precharge write recovery +
precharge time
Internal write to read command
delay
Internal read to precharge
command delay
Exit self-refresh to a non-read
command
Exit self-refresh to a read
command
Exit precharge power down to any
non-read command
Exit active power down to read
command
Exit active power down to read
command
(slow exit/low power mode)
CKE minimum pulse width (high
and low pulse width)
tWR
tDAL
tWTR
tRTP
tXSNR
tXSRD
tXP
tXARD
tXARDS
tCKE
15

WR +
RU (tRP/ 
tCK (avg))
7.5

7.5

tRFC + 10 
200

2

2

8 − AL 
3

Output impedance test driver delay tOIT
0
12
MRS command to ODT update
delay
tMOD
0
12
Auto-refresh to active/auto-refresh
command time
tRFC
127.5

Average periodic refresh interval
(0°C ≤ TC ≤ +85°C)
tREFI

7.8
(+85°C < TC ≤ +95°C)
tREFI 
3.9
Minimum time clocks remains ON
tIS +
after CKE asynchronously drops tDELAY tCK(avg) 
low
+ tIH
-8G
DDR2-800 (6-6-6)
min.
max.
0.2

2

0.4
0.6
0.35

250

175

0.9
1.1
0.4
0.6
45
70000
tRCD min. 
7.5

35

2

15

WR +
RU (tRP/ 
tCK (avg))
7.5

7.5

tRFC + 10 
200

2

2

8 − AL 
3

0
12
0
12
127.5


7.8

3.9
tIS +
tCK(avg) 
+ tIH
-6E
DDR2-667 (5-5-5)
min.
max.
0.2

2

0.4
0.6
0.35

275

200

0.9
1.1
0.4
0.6
45
70000
tRCD min. 
7.5

37.5

2

15

WR +
RU (tRP/ 
tCK (avg))
7.5

7.5

tRFC + 10 
200

2

2

7 − AL 
3

0
12
0
12
127.5


7.8

3.9
tIS +
tCK(avg) 
+ tIH
Unit Notes
tCK
(avg)
nCK
tCK
(avg)
tCK
(avg)
ps 5
ps 4
tCK
(avg)
11
tCK
(avg)
12
ns
ns
ns
ns
nCK
ns
nCK 1, 9
ns 14
ns
ns
nCK
nCK
nCK 3
nCK 2, 3
nCK
ns
ns
ns
µs
µs
ns
Data Sheet E1400E10 (Ver. 1.0)
18