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Am79C940BVI Arkusz danych(PDF) 11 Page - Rochester Electronics |
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Am79C940BVI Arkusz danych(HTML) 11 Page - Rochester Electronics |
11 / 13 page 79C940 Specification Number 79C940B-CI (A) Rev C Page 11 of 13 94 AC CHARACTERISTICS (continued) No. Parameter Symbol Parameter Description Test Conditions Min (ns) Max (ns) AUI Timing 53 tDOTD XTAL1 (externally driven) to DO± ουτπυτ 100 54 tDOTR DO± rise time (10% to 90%) 2.5 5.0 55 tDOTF DO± fall time (10% to 90%) 2.5 5.0 56 tDOETM DO± rise and fall mismatch 1 57 tDOETD DO± End of Transmit Delimiter 200 375 58 tPWRDI DI± pulse width to reject |input| > |VASQ| 15 59 tPWODI DI± pulse width to turn on internal DI carrier sense |input| > |VASQ| 45 60 tPWMDI DI± pulse width to maintain internal DI carrier sense on |input| > |VASQ| 45 136 61 tPWKDI DI± pulse width to turn internal DI carrier sense off |input| > |VASQ| 200 62 tPWRCI CI± pulse width to reject |input| > |VASQ| 10 63 tPWOCI CI± pulse width to turn on internal SQE sense |input| > |VASQ| 26 64 tPWMCI CI± pulse width to maintain internal SQE sense on |input| > |VASQ| 26 90 65 tPWKCI CI± pulse width to turn internal SQE sense off |input| > |VASQ| 160 66 tSQED CI± SQE Test delay from O± inactive |input| > |VASQ| 67 tSQEL CI± SQE Test length |input| > |VASQ| 79 tCLSHI CLSN high time tSTDC + 30 80 tTXH TXEN or DO± hold time from CLSN↑ |input| > |VASQ| 32*tSTDC 96*tSTDC DAI Port Timing 70 tTXEND STDCLK↑ delay to TXEN↓ CL = 50 pF 70 72 tTXDD STDCLK↑ delay to TXDAT± change CL = 50 pF 70 80 tTXH TXEN or TXDAT± hold time from CLSN↑ 32*tSTDC 96*tSTDC 95 tDOTF Mismatch in STDCLK ≠ to TXEN↓ and TXDAT± change 15 96 tTXDTR TXDAT± rise time See Note 1 5 97 tTXDTF TXDAT± fall time See Note 1 5 98 tTXDTM TXDAT± rise and fall mismatch See Note 1 1 99 tTXENETD TXEN End of Transmit Delimiter 250 350 100 tFRXDD First RXDAT↓ delay to RXCRS↑ 100 101 tLRXDD Last RXDAT ≠ delay to RXCRS↓ 120 102 tCRSCLSD RXCRS↑ delay to CLSN↑ (TXEN = 0) 100 TABLE 5 SPECIFICATION NUMBER: 79C940-CI (A) REV - Page 11 of 13 |
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