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SN75LBC970ADL Datasheet(PDF) 8 Page - Texas Instruments |
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SN75LBC970ADL Datasheet(HTML) 8 Page - Texas Instruments |
8 / 20 page SN75LBC970A SCSI DIFFERENTIAL CONVERTER-CONTROL SLLS215B – MAY 1995 – REVISED JANUARY 1999 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) TEST CONDITIONS MIN TYP† MAX UNIT AATN – AC/D – BATN ± BC/D ± See Figure 3 76 26 6 td1 td2 Delay time, A to B, high- to low-level or AI/O – AMSG – BI/O ± BMSG ± See Figure 3 7.6 26.6 ns td1, td2 high- to low-level or low- to high-level output AACK BACK ± 8.5 25.3 ns g AACK – AREQ – BACK ± BREQ ± VCC = 5 V, TA = 25°C 10 18 AREQ – BREQ ± VCC = 5 V, TA = 70°C 12.5 20.5 tsk(lim) Skew limit AACK – BACK ± See Note 4 8 ns tsk(p) Pulse skew AREQ – BREQ ± See Note 5 6 ns td3 td4 Delay time, B to A, high- to low-level or BATN ± BC/D ± BI/O ± BMSG ± AATN – AC/D – AI/O – AMSG – See Figure 4 21.5 36.2 ns td3, td4 high- to low-level or low- to high-level output BACK ± AACK 21.5 36.2 ns g BACK ± BREQ ± AACK – AREQ – VCC = 5 V, TA = 25°C 23.6 32.6 BREQ ± AREQ – VCC = 5 V, TA = 70°C 24.4 33.4 tsk(lim) Skew limit BACK ± AACK – See Note 4 9 ns tsk(p) Pulse skew BREQ ± AREQ – See Note 5 6 ns tPHL Delay time, high- to low-level TIMEOUT DRVBUS See Figure 5 200 ns tPLH Delay time, low- to high-level TIMEOUT DRVBUS See Figure 5 200 ns ABSY – BBSY ± 200 tdis Disable time ARST – BRST ± See Figure 6 200 ns ASEL – BSEL ± 200 ABSY – BBSY ± 40 ten Enable time ARST – BRST ± See Figure 6 55 ns ASEL – BSEL ± 39 tdis1 Disable time BRST ± ARST – 93 ns tdis2 Disable time BSEL ± ASEL – 55 ns tdis3 Disable time BBSY ± ABSY – 60 ns ten1 Enable time BRST ± ARST – See Figure 7 63 ns ten2 Enable time BSEL ± ASEL – 45 ns ten3 Enable time BBSY ± ABSY – 45 ns ten4 Enable time BSEL ± ASEL – 92 ns † All typical values are at VCC = 5 V, TA = 25 °C. NOTES: 4. This parameter is applicable at one VCC and operating temperature within the recommended operating conditions and to any two devices. 5. Pulse skew is the difference between the high-to-low and low-to-high propagation delay times of any single channel. |
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