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Pa rallel SCSI Maximum Interfa ce
Electrical
Alternativ Specificatio Widt Connecto e n h Clock[7] Length Lengt r Bandwid Bandwidt Lengt names document (bits) (single h Devices Impedanc Voltag th h (Mbit/s) h [12] ended) LVD e [Ω] e [V] [9] (MB/s) [8] HVD [10] [11]
Narrow SCSI-1 SCSI
SCSI-1 (1986)
IDC50; Centronics 8 C50
5 MHz 5 MB/s
NA
25m
8
SE 90 ± 6 5 Ω [13]
Fast SCSI
SCSI-2 (1994)
IDC50; Centronics 8 C50
10 MHz 10 MB/s 80 Mbit/s 1.5–3 m NA
25m
8
SE 90 ± 6 5 Ω [13]
FastWide SCSI
2 x 50-pin SCSI-2; (SCSI-2); SCSI-3 SPI 16 1 x 68-pin (1996) (SCSI-3)
40 Mbit/s 6 m
160 10 MHz 20 MB/s Mbit/s
1.5–3 m NA
25m
16
SE 90 ± 6 Ω [13] 5
Ultra SCSI
SCSI-3 SPI IDC50
8
20 MHz 20 MB/s
160 Mbit/s
1.5–3 m NA
25m
8-4 SE 90 ± 6 5 (HVD:8) Ω [13]
Ultra Wide SCSI
SCSI-3 SPI 68-pin
16
20 MHz 40 MB/s
320 Mbit/s
1.5–3 m NA
25m
8-4 SE 90 ± 6 (HVD:16 [13] 5 Ω )
Ultra2 SCSI
SCSI-3 SPI-2 (1997)
50-pin
8
40 MHz 40 MB/s
320 Mbit/s
NA
12m
25m
8
LVD 125 ± 10 Ω [13]
Ultra2 Wide SCSI
SCSI-3 SPI-2
68-pin; 80-pin 16 (SCA/SC A-2)
40 MHz 80 MB/s
640 Mbit/s
NA
12m
25m
16
LVD 125 ± 10 Ω [13]
Ultra3 SCSI
Ultra-160; SCSI-3 Fast-80 SPI-3 wide (1999)
68-pin; 80-pin 16 (SCA/SC A-2)
40 MHz 1280 160 MB/s DDR Mbit/s
NA
12m
NA
16
LVD 125 ± 10 Ω [13]
Ultra320 SCSI
Ultra-4 SCSI or Fast-160
68-pin; 16 80-pin (SCA/SC
NA
12m
NA
16
Fast-20
Fast-40
SCSI3(2002)
80 MHz 320 MB/s 2560 DDR Mbit/s
LVD 125 ± 10 Ω [13]
SCSI Ultra640 SCSI
Ultra-5;
A-2)
SCSI3(2003)
68-pin; 80-pin
16
160 MH 5120 640 MB/s z DDR Mbit/s
??
16
Electrical
Alternativ Specificatio Widt Connecto e n h Clock[7] Length Lengt r Bandwid Bandwidt Lengt names document (bits) (single h Devices Impedanc Voltag th h (Mbit/s) h [12] ended) LVD e [Ω] e [V] [9] (MB/s) [8] HVD [10] [11]
Narrow SCSI-1 SCSI
SCSI-1 (1986)
IDC50; Centronics 8 C50
5 MHz 5 MB/s
NA
25m
8
SE 90 ± 6 5 Ω [13]
Fast SCSI
SCSI-2 (1994)
IDC50; Centronics 8 C50
10 MHz 10 MB/s 80 Mbit/s 1.5–3 m NA
25m
8
SE 90 ± 6 5 Ω [13]
FastWide SCSI
2 x 50-pin SCSI-2; (SCSI-2); SCSI-3 SPI 16 1 x 68-pin (1996) (SCSI-3)
40 Mbit/s 6 m
160 10 MHz 20 MB/s Mbit/s
1.5–3 m NA
25m
16
SE 90 ± 6 Ω [13] 5
Ultra SCSI
SCSI-3 SPI IDC50
8
20 MHz 20 MB/s
160 Mbit/s
1.5–3 m NA
25m
8-4 SE 90 ± 6 5 (HVD:8) Ω [13]
Ultra Wide SCSI
SCSI-3 SPI 68-pin
16
20 MHz 40 MB/s
320 Mbit/s
1.5–3 m NA
25m
8-4 SE 90 ± 6 (HVD:16 [13] 5 Ω )
Ultra2 SCSI
SCSI-3 SPI-2 (1997)
50-pin
8
40 MHz 40 MB/s
320 Mbit/s
NA
12m
25m
8
LVD 125 ± 10 Ω [13]
Ultra2 Wide SCSI
SCSI-3 SPI-2
68-pin; 80-pin 16 (SCA/SC A-2)
40 MHz 80 MB/s
640 Mbit/s
NA
12m
25m
16
LVD 125 ± 10 Ω [13]
Ultra3 SCSI
Ultra-160; SCSI-3 Fast-80 SPI-3 wide (1999)
68-pin; 80-pin 16 (SCA/SC A-2)
40 MHz 1280 160 MB/s DDR Mbit/s
NA
12m
NA
16
LVD 125 ± 10 Ω [13]
Ultra320 SCSI
Ultra-4 SCSI or Fast-160
68-pin; 16 80-pin (SCA/SC
NA
12m
NA
16
Fast-20
Fast-40
SCSI3(2002)
80 MHz 320 MB/s 2560 DDR Mbit/s
LVD 125 ± 10 Ω [13]
SCSI Ultra640 SCSI
Ultra-5;
A-2)
SCSI3(2003)
68-pin; 80-pin
16
160 MH 5120 640 MB/s z DDR Mbit/s
??
16
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