nt1gt72u8pb0by Nanya Techology, nt1gt72u8pb0by Datasheet - Page 17

• Manufacturer Part Number: nt1gt72u8pb0by
• Description: 240pin Unbuffered Ddr2 Sdram Module With Ecc Based On 64mx8 Ddr2 Sdram B Die
• Manufacturer: Nanya Techology

NT512T72U89B0BY / NT1GT72U8PB0BY
512MB: 64M x 72 / 1GB: 128M x 72
Unbuffered DDR2 SDRAM DIMM with ECC
AC Timing Specifications for DDR2 SDRAM Devices Used on Module
(T
REV 1.3
03/2007
CASE
Symbol
t
t
t
LZ(DQS)
t
t
t
t
DQSCK
t
LZ(DQ)
t
t
t
t
t
DQSQ
t
WPRE
= 0 °C ~ 85 ° C; V
t
DQSS
DQSH
DQSL
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
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 high pulse width
DQS input low pulse width
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
DDQ
= 1.8V ± 0.1V; V
CH
)
or clk low (t
Parameter
CL
DD
) time
= 1.8V ± 0.1V, See AC Characteristics) (Part 1 of 2)
17
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
t
2t
0.375
t
IS
-0.45
-0.25
Min.
0.45
0.45
3.75
0.35
0.35
0.35
0.40
0.35
0.25
-0.5
AC min
t
+ t
225
100
t
0.6
0.2
0.2
0.9
0.4
t
AC min
t
HP
QHS
or
+
CH
2
CL
-
-
-
IH
t
-
CK
-37B
105
+0.45
t
t
t
Max.
+0.5
0.55
0.55
AC max
AC max
AC max
0.30
0.25
0.60
0.4
1.1
0.6
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2t
0.275
t
-0.48 +0.52 -0.40 +0.40
-0.25
Min.
t
0.48
0.48
0.35
0.35
0.35
0.40
0.35
-0.4
175
100
AC min
t
t
t
0.6
0.2
0.2
0.2
0.9
0.4
CK
t
AC min
t
HP
QHS
IS
or
t
CH
CL
3
2
-
-
-
IH
+
+
-
-3C
105
t
t
t
Max.
+0.4
0.52
0.52
AC max
AC max
AC max
0.24
0.34
0.25
0.60
1.1
0.6
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2t
0.250
0.175
-0.35 +0.35
t
-0.25
Min.
0.48
0.48
0.35
0.35
0.35
0.40
0.35
t
AC min
125
t
t
t
CK
2.5
0.6
0.2
0.2
0.9
0.4
-25C/-25D
t
t
50
AC min
HP
QHS
IS
or
t
CH
CL
2
-
-
-
IH
+
+
-
105
t
t
t
Max.
0.52
0.52
AC max
AC max
AC max
0.20
0.30
0.25
0.60
1.1
0.6
© NANYA TECHNOLOGY CORP.
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
ns
ns
t
t
t
ns
ps
ps
t
t
ns
ns
ns
ns
ns
ns
t
t
t
t
t
t
t
t
ns
ns
t
t
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
Notes