NT256D64S88ABG Datasheet, PDF (11/15 Pages) List of Unclassifed Manufacturers – 184pin One Bank Unbuffered DDR SDRAM MODULE

NT256D64S88ABG
256MB : 32M x 64
PC2700 Unbuffered DIMM
AC Timing Specifications for DDR SDRAM Devices Used on Module
(TA = 0 °C ~ 70 °C; VDDQ = 2.5V ± 0.2V; VDD = 2.5V ± 0.2V, See AC Characteristics) (Part 1 of 2)
Symbol
tAC
tDQSCK
tCH
tCL
tCK
tCK
tDH
tDS
tDIPW
tHZ
tLZ
tDQSQ
tDQSQA
tHP
tQHS
tQH
tDQSS
tDQSL,H
tDSS
tDSH
tMRD
tWPRES
tWPST
tWPRE
tIH
tIS
tIH
tIS
Parameter
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=2.5
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)
DQS-DQ skew (DQS & all DQ signals)
Minimum half clk period for any given cycle;
defined by clk high (tCH ) or clk low (tCL ) time
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 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)
Address and control input setup time (slow slew
rate)
-6
Min.
-0.7
-0.7
0.45
0.45
6
7.5
0.45
0.45
1.75
-0.7
-0.7
min
(tCH, tCL)
0.55
tHP - tQHS
0.75
0.35
0.2
0.2
12
0
0.40
0.25
0.75
Max.
+0.7
+0.7
0.55
0.55
12
12
+0.7
+0.7
0.4
0.4
1.25
0.60
0.75
0.8
0.8
Unit
Notes
ns
1-4
ns
1-4
tCK
1-4
tCK
1-4
ns
1-4
ns
1-4
ns 1-4, 15, 16
ns 1-4, 15, 16
ns
1-4
ns
1-5
ns
1-5
ns
1-4
ns
1-4
tCK
1-4
Ns
tCK
1-4
tCK
1-4
tCK
1-4
tCK
1-4
tCK
1-4
ns
1-4
ns
1-4, 7
tCK
1-4, 6
tCK
1-4
2-4, 9, 11,
ns
12
2-4, 9, 11,
ns
12
2-4, 10-12,
ns
14
2-4, 10-12,
ns
14
REV 1.1
08/2002
11
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NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.