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 Radiation Performance - Total dose > 100 krad (Si)  Designed for RS485 and RS422 Interface Applications  Single +5V supply  +5V to -7V Bus common mode range source output  Driver maintains high impedance in three-state or with the power off  Combined Impedance of a driver output and receiver allows up to 32 transceivers on the bus  200 mV typical input hysteresis  Serial data rate 500KHz maximum  V oltage source output  Receiver output Hi for VIN Diff = 0V  < 5ns skew between BUS and BUSN complementary outputs  Monolithic construction  Designed for commercial, industrial and aerospace applications  Plainview is a Class H & K MIL-PRF-38534 manufacturer  Packaging – Hermetic Flat Package - 18-lead, 0.63"sq x 0.125"Ht - Weight - 3.50 grams max  Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G . GENERAL DESCRIPTION The Aeroflex-Plainview DRS4485 is a monolithic dual bu s/line transceiver designed for multi-point data transmission standard RS485 applications. The DRS4485 meets TIA/EIA -485 requirements. The receiver has a fail-safe feature which guarantees a high output state when the BUS is open or shorted. DRS4485 Dual RS485 Interface Transceiver Standard Products December 5, 2014 Radiation Tolerant BUS BUSN DI DE FIGURE 1 – SCHEMATIC Rx OUT Rx EN Rx DR VCC GND Channel 1 or 2 www.aeroflex.com/RadHard Datasheet

SCD4485 Rev G 12/5/14 Aeroflex Plainview ABSOLUTE MAXIMUM RATINGS Parameter Range Operating Case Temperature -55°C to +125°C Storage Case Temperature -65°C to +150°C Power Supply Voltages (V CC)+ 1 2 V DC Control Input Voltage -0.5 V DC to Vcc + 0.5VDC Driver Input Voltage -0.5 V DC to Vcc + 0.5VDC Driver Output Voltage ±5V Receiver Input Voltage ±5V Receiver Output Voltages -0.5 V DC to Vcc + 0.5VDC NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rating only; functional operation beyond the "Operation Conditions" is not recommended and extended exposure beyond the "Operation Conditions" may affect device reliability. ELECTRICAL CHARACTERISTICS 2/ 4/ Parameter Condition Symbol Min Typ Max Unit Differential driver output voltage (unloaded) IO = 0 V OD1 2.5 3.0 5 Vp-p Differential driver output voltage (with load) 1/ See Figure 2 VOD2 2.5 3.0 5 Vp-p Change in magnitude of driver differential output Voltage for complementary states VOD - - 0.2 Vp-p Driver common mode output voltage VOC -2 . 5 53 V Change in magnitude of driver common-mode output Voltage for complementary states |VOC -- 0 . 2 V Input high voltage DE, DI, RE VIH 2.4 - - V Input low voltage VIL -0 . 8V Input current 1/ IIN ±1 ±2 µA Differential input threshold voltage for receiver -6.5V £ V CM £+ 5 V VTH -0.5 -0.2 -0.1 V Receiver input hysteresis 3/V CM = 0 VTH - 160 400 mV Receiver output high voltage 1/ IO = -0.4mA V OH 4.0 - - V Receiver output low voltage 1/ IO = 0.4mA V OL -- 0 . 5 V Receiver input differential resistance 3/- RINDIFF 30K - -  Receiver input common-mode resistance 3/- RINCM 8K - -  Driver short-circuit current 1/- IOS 50 80 140 mA Receiver short-circuit current 1/V OH to GND or VOL to Vcc IOSR 75 0 8 5 m A STATIC DC POWER SUPPLY CURRENTS 2/ Input Conditions Driver Output Conditions Sym Min Typ Max Unit Channel Conditions Channel 1 Channel 2 DE DI RE Output State Output Load Driver Receiver Driver Receiver 0V X 5V HiZ X ICC1 1/ -1 0 1 6 mA Disabled Disabled Disabled Disabled 5V X 0V LoZ NL ICC2 1/ -2 9 4 0 mA Enabled Enabled Disabled Disabled 5V X 0V LoZ 60 W ICC3 -5 0 6 5 mA Enabled Enabled Disabled Disabled

SCD4485 Rev G 12/5/14 Aeroflex Plainview FIGURE 3B – DRS4485 DRIVING 500FT OF BELDEN 3105A, 120Ω CABLE

SCD4485 Rev G 12/5/14 Aeroflex Plainview 4X R.020 DRS4485 88379 1018 MADE IN THE USA PACKAGE CONFIGURATION OUTLINE PIN # vs FUNCTION TABLE Pin # Function Pin # Function

1 DRIVER ENABLE 1 10 VCC

2 RECEIVER ENABLE 1 11 GROUND

3 RECEIVER OUT 1 12 BUS 2

4 CASE_GND 13 BUSN 2

5 DRIVER IN 1 14 DRIVER IN 2

6 BUSN 1 15 NC_GND

7 BUS 1 16 RECEIVER OUT 2

8 GROUND 17 RECEIVER ENABLE 2

9 VCC 18 DRIVER ENABLE 2

www.aeroflex.com/HiRel info-ams@aeroflex.com Aeroflex Plainview, Inc. reserves the right to make changes to any products and services described herein at any time without notice. Consult Aeroflex or an authorized sales representative to verify that the information in this data sheet is current before using this product. Aeroflex does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by Aeroflex; nor does the purchase, lease, or use of a product or service from Aeroflex convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual rights of Aeroflex or of third parties. EXPORT CONTROL: This product is controlled for export under the U.S. Department of Commerce (DoC). A license may be required prior to the export of this product from the United States. Our passion for performance is defined by three attributes. Solution-Minded Performance-Driven Customer-Focused Datasheet Definitions: Advanced Product in Development Preliminary Shipping Non-Flight Prototypes Datasheet Shipping QML and Reduced HiRe l SCD4485 Rev G 12/5/14

ORDERING INFORMATION

Model DLA SMD # Screening Case DRS4485-7 - Commercial Flow, +25°C testing only Flat Pack DRS4485-S - Military Temperature, -55°C to +125°C Screened in accordance with the individual Test Methods of MIL-STD-883 for Space Applications DRS4485-201-1S 5962-0922601KXC In accordance with DLA SMD DRS4485-201-2S 5962-0922601KXA DRS4485-901-1S 5962R0922601KXC In accordance with DLA Certified RHA Program Plan to RHA Level "R", 100krad(Si)DRS4485-901-2S 5962R0922601KXA