nt1gt64u8hb0by Nanya Techology, nt1gt64u8hb0by Datasheet - Page 19

• Manufacturer Part Number: nt1gt64u8hb0by
• Description: 256mb 32m X 64 / 512mb 64m X 64 / 1gb 128m X 64 Unbuffered Ddr2 Sdram Dimm
  
  
  
• Manufacturer: Nanya Techology

NT256T64UH4B0FY / NT512T64U88B0BY / NT1GT64U8HB0BY
256MB: 32M x 64 / 512MB: 64M x 64 / 1GB: 128M x 64
Unbuffered DDR2 SDRAM DIMM
AC Timing Specifications for DDR2 SDRAM Devices Used on Module
(T
REV 1.2
03/2007
CASE
t
Symbol
t
DQSL,(H)
t
LZ(DQS)
t
DQSCK
t
t
t
t
t
t
t
LZ(DQ)
t
DQSQ
t
WPST
WPRE
t
t
DQSS
t
t
RPRE
t
t
t
DIPW
RPST
Delay
t
t
t
QHS
t
MRD
RRD
REFI
CCD
t
t
t
t
t
t
DSS
DSH
IPW
OIT
QH
t
t
AC
CH
HP
CK
DS
DH
HZ
= 0 °C ~ 85 ° C; V
CL
IH
IS
Minimum time clocks remains ON after CKE
asynchronously drops Low
Average Periodic Refresh Interval
(85ºC < T
Average Periodic Refresh Interval
(0ºC < T
OCD drive mode output delay
DQ output access time from CK/
DQS output access time from CK/
CK high-level width
CK low-level width
Minimum half clk period for any given cycle;
defined by clk high (t
Clock Cycle Time
DQ and DM input setup time(differential data
strobe)
DQ and DM input hold time(differential data strobe)
Input pulse width
DQ and DM input pulse width (each input)
Data-out high-impedance time from CK/
DQS low-impedance time from CK/
DQ low-impedance time from CK/
DQS-DQ skew (DQS & associated DQ signals)
Data hold Skew Factor
Data output hold time from DQS
Write command to 1st DQS latching transition
DQS input low (high) pulse width
(write cycle)
DQS falling edge to CK setup time
(write cycle)
DQS falling edge hold time from CK
(write cycle)
Mode register set command cycle time
Write postamble
Write preamble
Address and control input hold time
Address and control input setup time
Read preamble
Read postamble
Active bank A to Active bank B command
to
CASE
CASE
DDQ
< 85ºC)
= 1.8V ± 0.1V; V
< 95º C)
Parameter
CH)
or clk low (t
DD
= 1.8V ± 0.1V, See AC Characteristics) (Part 1 of 2)
CL
) time
2t
t
19
t
IS
AC
0.225
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
-0.50
-0.45
-0.25
AC
t
t
Min.
0.45
0.45
3.75
0.35
0.35
0.35
375
250
+t
t
0.1
0.6
HP
QHS
0.2
0.2
0.4
0.9
0.4
t
10
t
CH
or
CL
2
IH
0
2
-
-
-
PC2-4200
min
CK
min t
-
+
3.9
7.8
t
t
AC
AC
AC
Max.
0.50
0.45
0.55
0.55
0.25
0.3
0.4
0.6
1.1
0.6
12
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
max
max
max 2t
t
t
IS +
0.175
-0.45
-0.40
-0.25
ACmin
AC
0.45
0.45
0.35
t
t
0.35
0.40
0.35
0.90
0.40
+ t
Min.
275
200
t
QHS
t
0.1
0.6
HP
0.2
0.2
7.5
CH
or
CL
3
2
0
2
-
-
-
PC2-5300
IH
min t
t
CK
-
3.9
7.8
t
t
AC
+0.45
+0.40
+0.25
ACmax
ACmax
Max.
0.55
0.55
0.24
0.34
0.60
1.10
0.60
12
8
-
-
-
-
-
max 2t
-
-
-
-
-
-
-
-
-
-
t
IS +
t
0.125
-0.40
-0.35
ACmin
AC
-0.25
t
Min.
0.45
0.45
0.05
0.35
t
0.35
0.40
0.35
0.90
0.40
+ t
250
175
QHS
t
t
2.5
0.6
HP
0.2
0.2
7.5
CH
or
CL
2
0
2
-
-
-
PC2-6400
© NANYA TECHNOLOGY CORP.
IH
min t
t
-
CK
3.9
7.8
t
t
AC
+0.40
+0.35
+0.25
ACmax
ACmax
Max.
0.55
0.55
0.20
0.60
1.10
0.60
0.3
12
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
max
Unit
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ps
ps
ns
ns
:s
:s
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK