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K4H1G0438M-UC Datasheet(PDF) 15 Page - Samsung semiconductor |
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K4H1G0438M-UC Datasheet(HTML) 15 Page - Samsung semiconductor |
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15 / 23 page  DDR SDRAM DDR SDRAM 1Gb M-die (x4, x8) Pb-Free Revision 1.1 October, 2004 AC Timming Parameters & Specifications Parameter Symbol B3 (DDR333@CL=2.5)) A2 (DDR266@CL=2.0) B0 (DDR266@CL=2.5)) Unit Note Min Max Min Max Min Max Row cycle time tRC 60 65 65 ns Refresh row cycle time tRFC 120 120 120 ns Row active time tRAS 42 70K 45 120K 45 120K ns RAS to CAS delay tRCD 18 20 20 ns Row precharge time tRP 18 20 20 ns Row active to Row active delay tRRD 12 15 15 ns Write recovery time tWR 15 15 15 ns Last data in to Read command tWTR 1 1 1 tCK Col. address to Col. address delay tCCD 1 1 1 tCK Clock cycle time CL=2.0 tCK 7.5 12 7.5 12 10 12 ns CL=2.5 6 127.5 12 7.512 ns Clock high level width tCH 0.45 0.55 0.45 0.55 0.45 0.55 tCK Clock low level width tCL 0.45 0.55 0.45 0.55 0.45 0.55 tCK DQS-out access time from CK/CK tDQSCK -0.6 +0.6 -0.75 +0.75 -0.75 +0.75 ns Output data access time from CK/ tAC -0.7 +0.7 -0.75 +0.75 -0.75 +0.75 ns Data strobe edge to ouput data tDQSQ - 0.45 - 0.5 - 0.5 ns 12 Read Preamble tRPRE 0.9 1.1 0.9 1.1 0.9 1.1 tCK Read Postamble tRPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK CK to valid DQS-in tDQSS 0.75 1.25 0.75 1.25 0.75 1.25 tCK DQS-in setup time tWPRES 0 0 0 ns 3 DQS-in hold time tWPRE 0.25 0.25 0.25 tCK DQS falling edge to CK rising-setup tDSS 0.2 0.2 0.2 tCK DQS falling edge from CK rising- tDSH 0.2 0.2 0.2 tCK DQS-in high level width tDQSH 0.35 0.35 0.35 tCK DQS-in low level width tDQSL 0.35 0.35 0.35 tCK DQS-in cycle time tDSC 0.9 1.1 0.9 1.1 0.9 1.1 tCK Address and Control Input setup tIS 0.75 0.9 0.9 ns i,5.7~9 Address and Control Input hold tIH 0.75 0.9 0.9 ns i,5.7~9 Address and Control Input setup tIS 0.8 1.0 1.0 ns i, 6~9 Address and Control Input hold tIH 0.8 1.0 1.0 ns i, 6~9 Data-out high impedence time from CK/CK tHZ +0.7 +0.75 +0.75 ns 1 Data-out low impedence time from CK/CK tLZ -0.7 +0.7 -0.75 +0.75 -0.75 +0.75 ns 1 Output Slew Rate Matching tSLMR 0.67 1.5 0.67 1.5 0.67 1.5 |
Similar Part No. - K4H1G0438M-UC |
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Similar Description - K4H1G0438M-UC |
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