Product Summary

The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 5Mbps. The SP491 is identical to the SP490 with the addition of driver and
receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over
wide common mode range. The SP490 is available in 8-pin plastic DIP and 8-pin NSOIC
packages for operation over the commercial and industrial temperature ranges. The SP491
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and
industrial temperature ranges.

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
SP491ES-L
SP491ES-L
Exar
RS-485 Interface IC Full Duplex RS-485 s
Data Sheet
0-1: $1.22
1-25: $0.92
25-100: $0.79
100-250: $0.66
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
SP49
SP49
Triad Magnetics
Transformers Audio & Signal 300CT/600 XFMR PRI/SEC RED SPEC
Data Sheet
0-1: $13.19
1-10: $11.21
10-25: $10.02
25-50: $8.97
SP490
SP490
Other

Data Sheet
Negotiable 
SP490CN-L
SP490CN-L
Exar
Universal Bus Functions RS485 5000 kbps temp 0C to 70C
Data Sheet
0-1: $1.12
1-25: $0.91
25-100: $0.82
100-250: $0.71
SP490CN-L/TR
SP490CN-L/TR
Exar
Universal Bus Functions Full Duplex RS-485 s
Data Sheet
0-1820: $0.46
1820-2500: $0.43
SP490CS-L
SP490CS-L
Exar
Universal Bus Functions RS485 5000 kbps temp 0C to 70C
Data Sheet
0-1: $1.12
1-25: $0.89
25-100: $0.76
100-250: $0.64
SP490E
SP490E
Other

Data Sheet
Negotiable