nt1gt72u8pb1bd-2c Nanya Techology, nt1gt72u8pb1bd-2c Datasheet - Page 12

• Manufacturer Part Number: nt1gt72u8pb1bd-2c
• Description: 240pin Ddr2 Sdram Fully Buffered Dimm Based On 64mx8 & 128mx4 Ddr2 Sdram - B Die
• Manufacturer: Nanya Techology

NT512T72U89B1BD-2C / NT1GT72U8PB1BD-2C / NT2GT72U4NB1BD-2C
512MB: 64Mx72 / 1GB: 128Mx72 / 2GB: 256Mx72
AC Timing Specifications for DDR2 SDRAM Devices Used on Module
(T
REV 1.0
09/2007
CASE
= 0 °C ~ 85 ° C; V
DDQ
t
Symbol
t
DQSL,(H)
t
LZ(DQS)
t
t
t
t
DQSCK
t
t
LZ(DQ)
t
t
WPRE
DQSQ
t
DQSS
t
t
WPST
t
RPRE
t
t
t
t
t
DIPW
RPST
t
t
t
WTR
t
WL
DSH
t
QHS
t
RRD
FAW
CCD
t
t
DSS
t
t
t
t
DAL
RTP
CKE
IPW
t
t
QH
WR
CK
CH
DS
DH
AC
HZ
HP
= 1.8V ± 0.1V; V
CL
IS
IH
Average clock period
Average clock high-level width
Average clock low-level width
Average command to DQS associated clock
edge
Write command to 1st DQS latching transition
DQS falling edge to CK setup time
(write cycle)
DQS falling edge hold time from CK
(write cycle)
DQS input low (high) pulse width
(write cycle)
Write preamble
Write postamble
Address and control input setup time
Address and control input hold time
Input pulse width
DQ and DM input setup time
DQ and DM input hold time
DQ and DM input pulse width (each input)
DQ output access time from CK/
DQS output access time from CK/
Data-out high-impedance time from CK/
DQS/
Data-out low-impedance time from CK/
DQS-DQ skew (DQS & associated DQ signals)
Minimum half clk period for any given cycle;
defined by clk high (t
Data hold Skew Factor
Data output hold time from DQS
Read preamble
Read postamble
Active bank A to Active bank B command
Four Activate Window
Write recovery time
Auto precharge write recovery + precharge time
Internal write to read command delay
Internal read to precharge command delay
CKE minimum pulse width
to
DD
low-impedance time from CK/
= 1.8V ± 0.1V, See AC Characteristics) (Part 1 of 2)
command delay
Parameter
CH
)
or clk low (t
12
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
CL
) time
t
t
-0.25
t
2500
+t
Min.
0.48
0.48
0.35
0.35
0.40
0.35
-400
-350
CH(abs)
CL(abs)
AC min
175
250
125
2t
t
t
WR
0.2
0.2
0.6
0.9
0.4
7.5
7.5
7.5
50
HP
QHS
35
15
min
or
2
3
-
-
-
nRP
AC
-
RL-1
-2C
t
t
t
Max.
+400
+350
8000
0.52
0.52
0.25
0.60
AC max
AC max
AC max
200
300
1.1
0.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit Notes
nCK
nCK
nCK
nCK
t
t
t
t
t
t
t
t
t
t
t
t
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ns
ns
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
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