NT256D64S88B1G Nanya Technology, NT256D64S88B1G Datasheet - Page 20

• Manufacturer Part Number: NT256D64S88B1G
• Description: (NT256D64S88Bxx) 256MB DDR DIMM
• Manufacturer: Nanya Technology

NT512D64S8HB1G / NT512D64S8HB1GY / NT512D64S8HB0G
NT256D64S88B1G / NT256D64S88B1GY NT256D64S88B0G
NT128D64SH4B1G / NT512D72S8PB0G (ECC) / NT256D72S89B0G (ECC)
Unbuffered DDR DIMM
AC Timing Specifications for DDR SDRAM Devices Used on Module
T
REV 2.2
Aug 3, 2004
Preliminary
A
Symbol
t
t
= 0 °C ~ 70 °C; V
t
t
t
t
t
WPRES
t
DQSCK
t
DQSL
t
DQSQ
t
DQSH
t
t
WPST
WPRE
DQSS
DIPW
t
t
t
t
t
t
t
t
t
t
t
QHS
MRD
t
DSS
DSH
t
t
t
QH
AC
CH
CL
CK
CK
CK
DH
DS
HZ
HP
LZ
IH
IH
IS
,
DQ output access time from CK/CK
DQS output access time from CK/CK
CK high-level width
CK low-level width
Clock cycle time CL=3
Clock cycle time CL=2.5
Clock cycle time CL=2
DQ and DM input hold time
DQ and DM input setup time
DQ and DM input pulse width (each input)
Data-out high-impedance time from CK/CK
Data-out low-impedance time from CK/CK
DQS-DQ skew (DQS & associated DQ signals)
Minimum half clk period for any given cycle;
defined by clk high (t
Data output hold time from DQS
Data hold Skew Factor
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 preamble setup time
Write postamble
Write preamble
Address and control input hold time
(fast slew rate)
Address and control input setup time
(fast slew rate)
Address and control input hold time
(slow slew rate)
DDQ
= V
DD
= 2.5V ± 0.2V (PC2100/PC2700); V
Parameter
CH
) or clk low (t
CL
) time
DDQ
-0.65
-0.55
t
Min.
0.45
0.45
1.75
0.75
0.35
0.40
0.25
-0.6
-0.6
CH
t
t
0.4
0.4
0.2
0.2
0.6
0.6
0.7
20
HP
t
QHS
= V
5
6
CL
2
0
-
or
PC3200
-
DD
5T
= 2.6V ± 0.1V (PC3200) (Part 1 of 2)
+0.65
+0.55
Max.
0.55
0.55
+0.6
+0.6
1.25
0.60
0.4
0.5
12
8
-
NANYA reserves the right to change products and specifications without notice.
t
Min.
0.45
0.45
0.45
0.45
1.75
0.75
0.35
0.40
0.25
0.75
0.75
CH
t
-0.7
-0.7
-0.7
-0.7
t
7.5
0.2
0.2
0.8
HP
t
QHS
6
2
0
CL
-
or
PC2700
-
6K
Max.
+0.7
+0.7
0.55
0.55
+0.7
+0.7
0.45
0.55
1.25
0.60
12
12
-
© NANYA TECHNOLOGY CORPORATION
-0.75
-0.75
-0.75
-0.75
t
0.45
0.45
1.75
0.75
0.35
0.40
0.25
Min.
CH
t
t
7.5
0.5
0.5
0.2
0.2
0.9
0.9
1.0
HP
10
t
QHS
CL
2
0
-
or
PC2100
-
75B
+0.75
+0.75
+0.75
+0.75
Max.
0.55
0.55
0.75
1.25
0.60
0.5
12
12
-
Unit
t
t
t
t
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
10, 11,
2-4, 9,
2-4, 9,
15, 16
15, 16
11, 12
11, 12
12, 14
Notes
1-4, 5
1-4, 5
1-4, 7
1-4, 6
1-4,
1-4,
2-4,
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4
1-4