LTC2859IDD#PBF

LTC2859 is a half duplex, low power, 20Mbps RS485/422 transceiver operating on 5V supplies. The receiver includes a logic-selectable 120 ohm termination, one-eighth unit load supporting upto 256 nodes per bus, and a failsafe feature that guarantees a high output state under conditions of floating or shorted inputs. The driver features a logic-selectable low-EMI 250Kbps operating mode, and maintains a high output impedance over the entire common mode range when disabled or when the supply is removed. Excessive power dissipation caused by bus contention or a fault is prevented by current limiting all outputs and by a thermal shutdown. It is used in application such as low power RS485/RS422 transceiver, level translator, backplane transceiver etc.

• No damage or latch up to ESD: ±15KV HBM
• Guaranteed failsafe receiver operation over the entire common mode range
• Current limited drivers and thermal shutdown
• Power up/down glitch-free driver outputs
• Meets all TIA/EIA-485-A specifications
• Supply current in receive mode is 900µA maximum at (No load, DE = 0V, RE = 0V, TE = 0V)
• Supply current in shutdown mode is 5µA maximum at (DE = 0V, RE = VCC, TE = 0V)
• Maximum driver short-circuit current is ±120mA typical at (–7V ≤ (Y or Z) ≤ 12)
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

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