nt1gt72u4pa0bv Nanya Techology, nt1gt72u4pa0bv Datasheet - Page 18

• Manufacturer Part Number: nt1gt72u4pa0bv
• Description: 240pin Registered Ddr2 Sdram Module Based On 64mx8 & 128mx4 Ddr2 Sdram Die A
• Manufacturer: Nanya Techology

NT512T72U89A0BV / NT1GT72U4PA0BV / NT2GT72U4NA2BV
512MB: 64M x 72 / 1GB: 128M X 72 / 2GB: 256M X 72
Registered DDR2 SDRAM DIMM
AC Timing Specifications for DDR2 SDRAM Devices Used on Module
(T
REV 1.2
09/2006
CASE
= 0 °C ~ 85 ° C; V
DDQ
t
t
Symbol
DQSL,(H)
t
t
LZ(DQS)
DQSCK
t
t
t
t
t
LZ(DQ)
t
t
t
DQSQ
t
WPRE
t
DQSS
t
t
WPST
RPRE
t
t
DIPW
RPST
Delay
t
t
QHS
t
DSH
MRD
t
t
t
t
t
t
DSS
RFC
IPW
QH
t
t
AC
CH
HP
CK
DH
DS
HZ
= 1.8V ± 0.1V; V
CL
IH
IS
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 hold time
DQ and DM input setup time
Input pulse width
DQ and DM input pulse width (each input)
Data-out high-impedance time from CK/
Data-out low-impedance time from CK/
DQS 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
Minimum time clocks remains ON after CKE
asynchronously drops Low
Refresh to active/Refresh command time
DD
= 1.8V ± 0.1V, See AC Characteristics) (Part 1 of 2)
Parameter
CH
)
or clk low (t
18
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
CL
) time
-0.45 +0.45
t
-0.25
Min.
0.45
0.45
0.35
0.35
0.40
0.35
t
AC min
-0.4
175
100
2t
t
t
275
t
CK
0.6
0.2
0.2
0.2
0.9
0.4
t
t
HP
QHS
min
IS
t
or
CH
CL
3
2
-
-
-
IH
AC
+
+
-
-3C
105
t
t
t
Max.
+0.4
0.55
0.55
0.24
0.34
0.25
0.60
AC max
AC max
AC max
1.1
0.6
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
t
t
t
t
t
t
t
t
t
t
t
t
t
t
ns
ns
ns
ps
ps
ns
ns
ns
ns
ns
ns
ps
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
Notes
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