DRS4485 Datasheet, PDF (1/8 Pages) Aeroflex Circuit Technology – DRS4485 Dual RS485 Interface Transceiver

Standard Products
Datasheet
DRS4485 Dual RS485 Interface Transceiver
Radiation Tolerant
www.aeroflex.com/RadHard
December 5, 2014
FEATURES
 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
 Voltage 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 bus/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.
VCC
DI
DR
BUS
BUSN
DE
Rx OUT
Rx
Channel 1 or 2
SCD4485 Rev G
GND
Rx EN
FIGURE 1 – SCHEMATIC