nt256t64uh4a0f Nanya Techology, nt256t64uh4a0f Datasheet - Page 11

• Manufacturer Part Number: nt256t64uh4a0f
• Description: 240pin Unbuffered Ddr2 Sdram Module Based On 32mx16 Ddr2 Sdram
• Manufacturer: Nanya Techology

NT256T64UH4A0F / NT256T64UH4A0FY (Green)
256MB: 32M x 64
Unbuffered DDR2 SDRAM DIMM
AC Timing Specifications for DDR2 SDRAM Devices Used on Module
(T
REV 1.4
08/2006
CASE
Symbol
t
t
t
t
t
t
t
AONPD
t
t
t
XARDS
AOFPD
t
t
t
t
t
t
t
t
t
XSNR
XSRD
XARD
AOND
AOFD
ANPD
AXPD
t
t
Delay
WTR
t
AON
RCD
t
REFI
DAL
RTP
CKE
AOF
WR
= 0 °C ~ 85 ° C; V
OIT
RP
XP
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
CKE minimum pulse width
ODT turn-on delay
ODT turn-on
ODT turn-on (Power down mode)
ODT turn-off delay
ODT turn-off
ODT turn-off (Power down mode)
ODT to power down entry latency
ODT power down exit latency
OCD drive mode output delay
Minimum time clocks remains ON after CKE
asynchronously drops Low
Active to Read or Write delay
Precharge command period
Average Periodic Refresh Interval
DDQ
= 1.8V ± 0.1V; V
Parameter
DD
= 1.8V ± 0.1V, See AC Characteristics) (Part 2 of 2)
t
11
t
t
t
t
IS
t
(min)
RFC
AC
AC
AC
WR
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
6-AL
Min.
200
+
7.5
2.5
15
10
+2
t
15
15
t
2
2
3
2
AC
3
8
0
+t
(min)
(min)
(min)
IH
+10
t
CK
+2
RP
+
-5A
2t
t
(max)
t
(max)
2.5t
AC
AC
Max.
CK
+0.6
7.8
t
12
+1
(max)
(max)
AC
+
CK
+1
+1
t
AC
+
t
t
t
t
t
IS
t
RFC
(min)
AC
AC
AC
WR
6-AL
Min.
200
+
7.5
7.5
2.5
15
+2
t
15
15
t
AC
2
2
3
2
(min)
(min)
(min)
3
8
0
+t
IH
t
+10
CK
+2
RP
-37B
+
2t
(max)
(max)
t
t
2.5t
AC
AC
Max.
CK
+0.6
7.8
t
12
+1
(max)
(max)
AC
+
CK
+1
+1
t
AC
+
Unit
t
t
t
t
t
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
© NANYA TECHNOLOGY CORP.
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