HY5PS56421LF-E3 Datasheet, PDF (20/35 Pages) Hynix Semiconductor – 256Mb DDR2 SDRAM

HY5PS56421(L)F
HY5PS56821(L)F
HY5PS561621(L)F
Timing Parameters by Speed Grade
Parameter
Symbol
DQ output access time from CK/CK
DQS output access time from CK/CK
CK high-level width
CK low-level width
CK half period
tAC
tDQSCK
tCH
tCL
tHP
Clock cycle time, CL=x
tCK
DQ and DM input setup time
tDS
DQ and DM input hold time
tDH
Control & Address input pulse width for each input tIPW
DQ and DM input pulse width for each input
tDIPW
Data-out high-impedance time from CK/CK
tHZ
DQS low-impedance time from CK/CK
tLZ
(DQS)
DQ low-impedance time from CK/CK
tLZ
(DQ)
DQS-DQ skew for DQS and associated DQ signals tDQSQ
DQ hold skew factor
tQHS
DQ/DQS output hold time from DQS
tQH
Write command to first DQS latching transition
tDQSS
DQS input high pulse width
tDQSH
DQS input low pulse width
tDQSL
DQS falling edge to CK setup time
tDSS
DQS falling edge hold time from CK
tDSH
Mode register set command cycle time
tMRD
Write postamble
tWPST
Write preamble
tWPRE
Address and control input setup time
tIS
Address and control input hold time
tIH
Read preamble
tRPRE
Read postamble
tRPST
Active to active command period for 1KB
page size products
tRRD
Active to active command period for 2KB
page size products
tRRD
Four Active Window for 1KB page size
products
tFAW
DDR2-400
min
max
-600
+600
-500
+500
0.45
0.55
0.45
0.55
min(tCL,
-
tCH)
5000
8000
150
-
275
-
0.6
-
0.35
-
-
tAC max
tAC min
tAC max
2*tAC min
tAC max
-
-
tHP - tQHS
WL - 0.25
0.35
0.35
0.2
0.2
2
0.4
0.35
350
475
0.9
0.4
350
450
-
WL + 0.25
-
-
-
-
-
0.6
-
-
-
1.1
0.6
7.5
-
10
-
37.5
-
DDR2-533
min
max
-500
+500
-450
+450
0.45
0.55
0.45
0.55
min(tCL,
-
tCH)
3750
8000
100
-
225
-
0.6
-
0.35
-
-
tAC max
Unit Note
ps
ps
tCK
tCK
ps
11,12
ps
15
ps 6,7,8,20
ps 6,7,8,21
tCK
tCK
ps
18
tAC min
tAC max
ps
18
2*tAC min
tAC max
ps
18
-
-
tHP - tQHS
WL - 0.25
0.35
0.35
0.2
0.2
2
0.4
0.35
250
375
0.9
0.4
300
ps
13
400
ps
12
-
ps
WL + 0.25 tCK
-
tCK
-
tCK
-
tCK
-
tCK
-
tCK
0.6
tCK
10
-
tCK
-
ps 5,7,9,23
-
ps 5,7,9,23
1.1
tCK
0.6
tCK
7.5
-
ns
4
10
-
ns
4
37.5
-
ns
Rev 1.0/July. 2004
20