NT256D72S89AKGU Nanya Technology, NT256D72S89AKGU Datasheet - Page 11

• Manufacturer Part Number: NT256D72S89AKGU
• Description: 256MB DDR SDRAM DIMM
• Manufacturer: Nanya Technology

NT256D72S89AKGU
256MB : 32M x 72
Low Profile Registered DDR SDRAM DIMM
AC Timing Specifications for DDR SDRAM Devices Used on Module
(TA = 0 °C ~ 70 °C; V
REV 1.1
12/2002
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
AC
DQSCK
CH
CL
CK
CK
DH
DS
DIPW
HZ
LZ
DQSQ
DQSQA
HP
QH
DQSS
DQSL,H
DSS
DSH
MRD
WPRES
WPST
WPRE
IH
IS
IH
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
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)
DQS-DQ skew (DQS & all DQ
signals)
Minimum half clk period for any given
cycle; defined by clk high (t
or clk low (t
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 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
CL
= 2.5V ± 0.2V; V
Parameter
) time
CH
CL=2.5
DD
CL=2
)
= 2.5V ± 0.2V, See AC Characteristics) (Part 1 of 2)
0.75ns
-0.75
-0.75
-0.75
-0.75
0.45
0.45
1.75
t
0.75
0.35
0.40
0.25
Min.
7.5
0.5
0.5
t
HP
0.2
0.2
0.9
0.9
1.0
t
14
CH
or
CL
7
0
-
-7K
+0.75
+0.75
+0.75
+0.75
Max.
0.55
0.55
1.25
0.60
0.5
0.5
11
12
12
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
0.75ns
-0.75
-0.75
-0.75
-0.75
Min.
0.45
0.45
1.75
t
0.75
0.35
0.40
0.25
t
7.5
0.5
0.5
t
HP
0.2
0.2
1.1
1.1
1.1
10
15
CH
or
CL
0
-
-75B
+0.75
+0.75
+0.75
+0.75
Max.
0.55
0.55
1.25
0.60
0.5
0.5
12
12
1.0ns
Min.
0.45
0.45
t
0.75
0.35
0.40
0.25
-0.8
-0.8
-0.8
-0.8
t
HP
0.6
0.6
t
0.2
0.2
1.1
1.1
1.1
10
16
CH
or
CL
8
2
0
-
-8B
Max.
+0.8
+0.8
0.55
0.55
+0.8
+0.8
1.25
0.60
© NANYA TECHNOLOGY CORP.
0.6
0.6
12
12
Unit
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
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
10-12,
15, 16
15, 16
Notes
1-4, 5
1-4, 5
1-4, 7
1-4, 6
9, 11,
9, 11,
1-4,
1-4,
2-4,
2-4,
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
12
12
14