SP491CN/TR Exar Corporation, SP491CN/TR Datasheet
SP491CN/TR
Related parts for SP491CN/TR
SP491CN/TR Summary of contents
Page 1
... The SP491 is available in 4-pin DIP and 4-pin NSOIC packages for operation over the commercial and industrial temperature ranges. SP490 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com Full Duplex RS-485 Transceivers SP490 and SP491 DESCRIPTION ...
Page 2
... DC Characteristics Differential Input Threshold Input Hysteresis Output Voltage High Output Voltage Low Input Resistance Input Current (A, B 2V IN Input Current (A, B -7V IN Short-Circuit Current Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com +0.5V) CC +0.5V) CC ELECTRICAL CHARACTERISTICS GND V Volts Volts CC ...
Page 3
... ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (C_) Industrial (E_) Storage Temperature Package Plastic DIP (_S) NSOIC (_N) Figure . Driver DC Test Load Circuit Figure 3. Driver/Receiver Timing Test Circuit Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com ELECTRICAL CHARACTERISTICS MIN. TYP. MAX. UNITS 5 Mbps 90 ...
Page 4
... Figure 6. Driver Propagation Delays Figure 7. Driver Enable and Disable Times Figure 8. Receiver Propagation Delays Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com 4 SP490,49_00_07408 ...
Page 5
... Driver Input to Output Driver Input to Output Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com +0.5V) CC +0.5V) CC +0.5V) CC +0.5V) ...
Page 6
... Supply Voltage +4.75 Supply Current SP491 ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (C_) Industrial (E_) Storage Temperature Package Plastic DIP (_S) NSOIC (_N) Figure 9. Receiver Enable and Disable Times Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com ELECTRICAL CHARACTERISTICS MIN. TYP. MAX. UNITS -0.2 +0.2 Volts 70 mV 3.5 Volts 0.4 Volts ± ...
Page 7
... With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than .5V voltage levels. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com The driver of the SP491 has a driver enable control line which is active high. A logic high on DE (pin 4) of the SP491 will enable the differential driver outputs ...
Page 8
... D 4.90 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0 1.04 REF L2 0.25 BSC ø 0º - ø1 5º - Note: Dimensions in (mm) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com E1 E1/2 E Seating Plane MAX 1.75 B 0.25 1.65 B 0.51 0.24 1.27 8º 15º c BASE MET AL 8 PACKAGE: 8 PIN NSOIC Ø ...
Page 9
... D 8.65 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0 1.04 REF L2 0.25 BSC ø 0º - ø1 5º - Note: Dimensions in (mm) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com PACKAGE: 14 PIN NSOIC Ø Seating Plane Ø1 E1/2 VIEW MAX 1.75 0.25 B 1.65 0.51 B 0.25 SEE VIEW C 1.27 8º ...
Page 10
... SYMBOL MIN 0.15 A2 0.115 b 0.014 b2 0.045 b3 0.3 c 0.008 D 0.355 D1 0.005 E 0 0.115 Note: Dimensions in (mm) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com N NOM MAX - 0. 0.13 0.195 0.018 0.022 0.06 0.07 0.039 0.045 0.01 0.014 0.365 0 ...
Page 11
... SYMBOL MIN 0.15 A2 0.115 b 0.014 b2 0.045 b3 0.3 c 0.008 D 0.735 D1 0.005 E 0 0.115 Note: Dimensions in (mm) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com NOM MAX - 0. 0.13 0.195 0.018 0.022 0.06 0.07 0.039 0.045 0.01 0.014 0.75 0.755 - - 0.31 ...
Page 12
... EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...