
10
V826632K24S Rev. 1.0 April 2002
MOSEL VITELIC
V826632K24S
AC Characteristics (cont.)
Notes: 1. This calculation accounts for tDQSQ(max), the pulse width distortion of on-chip circuit and jitter.
2. Data sampled at the rising edges of the clock : A0~A11, BA0~BA1, CKE, CS, RAS, CAS, WE.
3. For command/address input slew rate >=1.0V/ns
4. For command/address input slew rate >=0.5V/ns and <1.0V/ns
5. CK, CK slew rates are >=1.0V/ns
6. These parameters guarantee device timing, but they are not necessarily tested on each device, and they may be guaranteed
by design or tester correlation.
7. Data latched at both rising and falling edges of Data Strobes(DQS) : DQ, DM
8. Minimum of 200 cycles of stable input clocks after Self Refresh Exit command, where CKE is held high, is required to complete
Self Refresh Exit and lock the internal DLL circuit of DDR SDRAM.
DQS-Out edge to Clock edge Skew
tDQSCK
-0.75
0.75
-0.75
0.75
-0.8
0.8
ns
DQS-Out edge to Data-Out edge Skew
tDQSQ
-
0.5
-
0.5
-
0.6
ns
Data-Out hold time from DQS
tQH
tHPmin
-0.75ns
-
tHPmin
-0.75ns
-
tHPmin
-0.75ns
-
ns
1
Clock Half Period
tHP
tCH/L
min
-
tCH/L
min
-
tCH/L
min
-
ns
1
Input Setup Time (fast slew rate)
tIS
0.9
-
0.9
-
1.1
-
ns
2,3,5,6
Input Hold Time (fast slew rate)
tIH
0.9
-
0.9
-
1.1
-
ns
2,3,5,6
Input Setup Time (slow slew rate)
tIS
1.0
-
1.0
-
1.1
-
ns
2,4,5,6
Input Hold Time (slow slew rate)
tIH
1.0
-
1.0
-
1.1
-
ns
2,4,5,6
Write DQS High Level Width
tDQSH
0.4
0.6
0.4
0.6
0.4
0.6
CLK
Write DQS Low Level Width
tDQSL
0.4
0.6
0.4
0.6
0.4
0.6
CLK
CLK to First Rising edge of DQS-In
tDQSS
0.75
1.25
0.75
1.25
0.75
1.25
CLK
Data-In Setup Time to DQS-In (DQ & DM)
tDS
0.5
-
0.5
-
0.6
-
ns
7
Data-in Hold Time to DQS-In (DQ & DM)
tDH
0.5
-
0.5
-
0.6
-
ns
7
DQ & DM Input Pulse Width
tDIPW
1.75
-
1.75
-
2
-
ns
Read DQS Preamble Time
tRPRE
0.9
1.1
0.9
1.1
0.9
1.1
CLK
Read DQS Postamble Time
tRPST
0.4
0.6
0.4
0.6
0.4
0.6
CLK
Write DQS Preamble Setup Time
tWPRES
0
-
0
-
0
-
CLK
Write DQS Preamble Hold Time
tWPREH
0.25
-
0.25
-
0.25
-
CLK
Write DQS Postamble Time
tWPST
0.4
0.6
0.4
0.6
0.4
0.6
CLK
Mode Register Set Delay
tMRD
2
-
2
-
2
-
CLK
Power Down Exit Time
tPDEX
10
-
10
-
10
-
ns
Exit Self Refresh to Non-Read Command
tXSNR
75
-
75
-
80
-
ns
Exit Self Refresh to Read Command
tXSRD
200
-
200
-
200
-
CLK
8
Average Periodic Refresh Interval
tREFI
-
7.8
-
7.8
-
7.8
us
Parameter
Symbol
(PC266A)
(PC266B)
(PC200)
Unit
Note
Min
Max
Min
Max
Min
Max