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HYMD264G726BF4-J Datasheet(PDF) 10 Page - Hynix Semiconductor |
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HYMD264G726BF4-J Datasheet(HTML) 10 Page - Hynix Semiconductor |
10 / 16 page HYMD264G726B(L)F4-J Rev. 0.1 / Mar. 2003 10 AC CHARACTERISTICS (AC operating conditions unless otherwise noted) - continued - Note : 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~A12, 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 This derating table is used to increase tIS/tIH in case where the input slew-rate is below 0.5V/ns. Input Setup / Hold Slew-rate Derating Table. 5. CK, /CK slew rates are >=1.0V/ns 6. These parameters quarantee device timing, but they are not necessarily tested on each device, and they may be quaranteed by design or tester correlation. 7. Data latched at both rising and falling edges of Data Strobes(LDQS/UDQS) : DQ, LDM/UDM. 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. 9. Min (tCL, tCH) refers to the smaller of the actual clock low time and the actual clock high time as provided to the device (i.e. this value can be greater than the minimum specification limits for tCL and tCH). Parameter Symbol DDR333 Unit Note Min Max Input Pulse Width tIPW 2.2 ns 6 Write DQS High Level Width tDQSH 0.35 - CK Write DQS Low Level Width tDQSL 0.35 - CK Clock to First Rising edge of DQS-In tDQSS 0.75 1.25 CK Data-In Setup Time to DQS-In (DQ & DM) tDS 0.45 - ns 6,7, 11~13 Data-in Hold Time to DQS-In (DQ & DM) tDH 0.45 - ns 6,7, 11~13 DQ & DM Input Pulse Width tDIPW 1.75 - ns Read DQS Preamble Time tRPRE 0.9 1.1 CK Read DQS Postamble Time tRPST 0.4 0.6 CK Write DQS Preamble Setup Time tWPRES 0- CK Write DQS Preamble Hold Time tWPREH 0.25 - CK Write DQS Postamble Time tWPST 0.4 0.6 CK Mode Register Set Delay tMRD 2- CK Exit Self Refresh to Any Execute Command tXSC 200 - CK 8 Average Periodic Refresh Interval tREFI -7.8 us Input Setup / Hold Slew-rate Delta tIS Delta tIH V/ns ps ps 0.5 0 0 0.4 +50 0 0.3 +100 0 |
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