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3.3 V, 20 Mbps RS485/RS422 Transceiver

Rev. 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. T rademarks and registered trademarks are the property of their respective owners.

FEATURES

► 3.3 V supply voltage ► 20 Mbps maximum data rate ► No damage or latch-up up to ±15 kV HBM ► Guaranteed fail-safe receiver operation over the entire common- mode range ► Current-limited drivers and thermal shutdown ► Power-up and power-down glitch free driver outputs ► Low operating current: 370 µA typical in receive mode ► Compatible with TIA/EIA-485-A specifications ► Available in 14-lead SOIC_N package COMMERCIAL SPACE FEATURES ► Supports aerospace applications ► Wafer diffusion lot traceability ► Radiation lot acceptance testing: TID ► Radiation benchmark ► Single event latch-up

APPLICATIONS

► Low Earth orbit (LEO) space payloads ► Low power RS485/RS422 transceiver ► Level translator ► Backplane transceiver FUNCTIONAL BLOCK DIAGRAM Figure 1. Functional Block Diagram mon-mode range when disabled or when the supply is removed. prevented by current limiting all outputs and by thermal shutdown. transceiver interface pins without latch-up or damage.

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REVISION HISTORY

5/2022—Revision 0: Initial Version

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ELECTRICAL CHARACTERISTICS

VCC = 3.3 V. All currents into the device pins are positive, and all currents out of the device pins are negative. All voltages are referenced to device ground, unless otherwise specified. Specifications represent performance at −55°C ≤ TA ≤ +125°C, unless otherwise specified. Table 1. Electrical Characteristics

device ground, unless otherwise specified. Specifications represent performance at −55°C ≤ TA ≤ +125°C, unless otherwise specified. Table 2. Switching Characteristics 1 The maximum data rate is guaranteed by other measured parameters and is not tested directly. characterized, TID testing is performed to 20 krads only. Table 3. Electrical Characteristics

Table 4. Switching Characteristics

Table 5. Absolute Maximum Ratings

1 This IC includes overtemperature protection that is intended to protect the

device degradation or failure. ing conditions for extended periods may affect product reliability. θJC is the junction to case thermal resistance. θJA is the natural convection junction to ambient thermal resistance. Table 6. Thermal Resistance been used as screening levels for rejection of spacecraft materials. Table 7. Outgas Testing sitive devices in an ESD protected area only. Human body model (HBM) per ANSI/ESDA/JEDEC JS-001. Table 8. ADLT2852S-CSL, 14-Lead SOIC_N damage may occur on devices subjected to high energy ESD. performance degradation or loss of functionality.

Figure 2. Pin Configuration Table 9. Pin Function Descriptions 1, 8, 13 NIC Not internal connection. Do not connect to this pin. receiver inputs are open, shorted, or terminated without a valid signal, RO is high. 3 RE Receiver Enable. A low input enables the receiver. A high input forces the receiver output into a high impedance state. with DE low, the device enters a low power shutdown state. 5 DI Driver Input. If the driver outputs are enabled (DE high), a low input on DI forces the driver positive output low and negative output high. A high input on DI, with the driver outputs enabled, forces the driver positive output high and negative output low. 9 Y Noninverting Driver Output. High impedance when the driver is disabled or unpowered. 10 Z Inverting Driver Output. High impedance when the driver is disabled or unpowered. 11 B Inverting Receiver Input. Impedance is >96 kΩ when in receive mode or unpowered. 12 A Noninverting Receiver Input. Impedance is >96 kΩ when in receive mode or unpowered. Table 10. Truth Table

registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887-2356, U.S.A. Figure 19. 14-Lead Standard Small Outline Package [SOIC_N]