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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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XRT7250 датащи(PDF) 42 Page - Exar Corporation |
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XRT7250 датащи(HTML) 42 Page - Exar Corporation |
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42 / 463 page  áç áç áç áç DS3/E3 FRAMER IC XRT7250 REV. 1.1.1 23 t60B “RxOH” Data Valid to rising edge of "RxOHEnable" delay 910 420 25 930 440 32 ns ns ns DS3 Applications E3, ITU-T G.832 Applications E3, ITU-T G.751 Applications Microprocessor Interface - Intel (See Figure 15) t64 A8 - A0 Setup Time to ALE_AS Low 4ns t65 A8 - A0 Hold Time from ALE_AS Low. 2ns Intel Type Read Operations (See Figure 15 and Figure 17) t66 RDS_DS*, WR_RW* Pulse Width 60 ns t67 Data Valid from RDS_DS* Low. 611 ns t68 Data Bus Floating from RDS_DS* High 712 ns t69 ALE to RD Time 4ns t701 RD Time to "NOT READY" (e.g., RDY_DTCK tog- gling "Low") 6ns t70 RD to READY Time (e.g., RDY_DTCK toggling "high") 15 70 ns t76 Minimum Time between Read Burst Access (e.g., the rising edge of RD to falling edge of RD) 30 ns Intel Type Write Operations (Figure 16 and Figure 18) t71 Data Setup Time to WR_RW* High 4ns t72 Data Hold Time from WR_RW* High 2ns t73 High Time between Reads and/or Writes 30 ns t74 ALE to WR Time 4ns t77 Min Time between Write Burst Access (e.g., the ris- ing edge of WR to the falling edge of WR) 30 ns t770 CS Assertion to falling edge of WR_RW 20 ns Microprocessor Interface - Motorola Read Operations (See Figure 19 and Figure 21) t78 A8 - A0 Setup Time to falling edge of ALE_AS 5ns t79 Rising edge of RD_DS to rising edge of “RDY_DTCK” delay 0ns t80 Rising edge of “RDY_DTCK” to tri-state of D[7:0] 0ns Microprocessor Interface - Motorola Read & Write Operations (See Figure 19, Figure 20, Figure 21 and Figure 22) AC ELECTRICAL CHARACTERISTICS (CONT.) Test Conditions: TA = 25(C, VCC = 5.0V + 5% unless otherwise specified SYMBOL PARAMETER MIN.TYP.MAX.UNITS CONDITIONS |
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