HYB18T256400AF Datasheet, PDF (75/90 Pages) Infineon Technologies AG – 256 Mbi t DDR2 SDRAM

HYB18T256400/800/160AF
256Mb DDR2 SDRAM
7. Electrical Characteristics & AC Timing - Absolute Specification
7.1 Timing Parameter by Speed Grade - DDR2-400 & DDR2-533
(VDDQ = 1.8V ± 0.1V; VDD = 1.8V ± 0.1V) (notes 1-4)
Symbol
Parameter
-5
DDR2-400-333
min.
max
tAC DQ output access time from CK / CK
tDQSCK DQS output access time from CK / CK
tCH CK, CK high-level width
tCL CK, CK low-level width
tHP Clock half period
tCK Clock cycle time
CL = 3
CL = 4 & 5
- 600
+ 600
- 500
+ 500
0.45
0.55
0.45
0.55
min (tCL, tCH)
5000
8000
5000
8000
tIS Address and control input setup time
350
tIH Address and control input hold time
475
tDS DQ and DM input setup time
150
tDS DQ and DM input hold time
275
tIPW Address and control input pulse width (each input)
0.6
tDIPW DQ and DM input pulse width (each input)
0.35
tHZ Data-out high-impedance time from CK / CK
-
tLZ_(DQ) DQ low-impedance time from CK / CK
2*tACmin
tLZ_(DQS) DQS low-impedance from CK / CK
tACmin
tDQSQ DQS-DQ skew (for DQS & associated DQ signals)
-
tQHS Data hold skew factor
-
tQH Data output hold time from DQS
tHP-tQHS
tDQSS Write command to 1st DQS latching transition
WL-0.25
tDQSL,H DQS input low (high) pulse width (write cycle)
0.35
tDSS DQS falling edge to CK setup time (write cycle)
0.2
tDSH DQS falling edge hold time from CK (write cycle)
0.2
tMRD Mode register set command cycle time
2
tWPRE Write preamble
0.25
tWPST Write postamble
0.40
tRPRE Read preamble
0.9
tRPST Read postamble
0.40
tRAS Active to Precharge command
40
tRC Active to Active/Auto-Refresh command period
55
tRFC Auto-Refresh to Active/Auto-Refresh command period
75
tRCD
Active to Read or Write delay
(with and without Auto-Precharge)
15
-
-
-
-
-
-
tACmax
tACmax
tACmax
350
450
WL+0.25
-
-
-
-
-
0.60
1.1
0.60
70000
-
-
-
tRP Precharge command period
15
-
-3.7
DDR2-533-444
min.
-500
max
+500
-450
+450
0.45
0.55
0.45
0.55
min (tCL, tCH)
5000
8000
3750
8000
250
-
375
-
100
-
225
-
0.6
-
0.35
-
-
tACmax
2*tACmin tACmax
tACmin
tACmax
-
300
-
400
tHP-tQHS
WL-0.25
WL+0.25
0.35
-
0.2
-
0.2
-
2
-
0.25
-
0.40
0.60
0.9
1.1
0.40
0.60
45
70000
60
-
75
-
Unit Notes
ps
ps
tCK
tCK
5
ps
6
ps
6
ps 7
ps 7
ps 8
ps 8
tCK
tCK
ps
9
ps 9
ps 9
ps 18
ps
tCK
tCK
tCK
tCK
tCK
tCK
tCK 10
tCK 9
tCK 9
ns 11
ns
ns 12
15
-
ns 13
15
-
ns
Page 75
Rev. 1.02 May 2004
INFINEON Technologies