Seagate ST300MP0004 Savvio 15K SAS Product Manual - Page 73
Impedance specifications, Table 21, Impedance requirements Sheet 1 of 2
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9.5.2.3.4 Impedance specifications Table 21 defines impedance requirements. Table 21: Impedance requirements (Sheet 1 of 2) Requirement Time domain reflectometer rise time 20 % to 80 %a,b Media (PCB or cable) Differential impedanceb,c,d Differential impedance imbalanceb,c,d,g Common mode impedanceb,c,d Mated connectors Differential impedanceb,c,d Differential impedance imbalanceb,c,d,g Common mode impedanceb,c,d Receiver termination Differential impedanceb,e,f Differential impedance imbalanceb,e,f,g Receiver termination time constantb,e,f Common mode impedanceb,e Transmitter source termination Differential impedanceb Differential impedance imbalanceb,g Common mode impedanceb Units ps 1.5 Gbps 100 3.0 Gbps 50 ohm 100 ± 10 ohm 5 ohm 32.5 ± 7.5 100 ± 10 5 32.5 ± 7.5 ohm 100 ± 15 ohm 5 ohm 32.5 ± 7.5 100 ± 15 5 32.5 ± 7.5 ohm 100 ± 15 100 ± 15 ohm 5 5 ps 150 max 100 max ohm 20 min/40 max 20 min/40 max ohm 60 min/115 max 60 min/115 max ohm 5 5 ohm 15 min/40 max 15 min/40 max Savvio 15K SAS Product Manual, Rev. B 65