DatasheetsPDF.com

LTC2857-2 Dataheets PDF



Part Number LTC2857-2
Manufacturers Linear Technology
Logo Linear Technology
Description 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers
Datasheet LTC2857-2 DatasheetLTC2857-2 Datasheet (PDF)

LTC2856-1/LTC2856-2 LTC2857-1/LTC2857-2 LTC2858-1/LTC2858-2 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers FEATURES nn 20Mbps or Low EMI 250kbps Maximum Data Rate nn No Damage or Latchup to ESD: ±15kV HBM nn High Input Impedance Supports 256 Nodes (C, I-Grade) nn Operation Up to 125°C (H-Grade) nn Guaranteed Failsafe Receiver Operation Over the Entire Common Mode Range nn Current Limited Drivers and Thermal Shutdown nn Delayed Micropower Shutdown: 5µA Maximum (C, I-Grade) nn Power U.

  LTC2857-2   LTC2857-2



Document
LTC2856-1/LTC2856-2 LTC2857-1/LTC2857-2 LTC2858-1/LTC2858-2 20Mbps and Slew Rate Limited 15kV RS485/RS422 Transceivers FEATURES nn 20Mbps or Low EMI 250kbps Maximum Data Rate nn No Damage or Latchup to ESD: ±15kV HBM nn High Input Impedance Supports 256 Nodes (C, I-Grade) nn Operation Up to 125°C (H-Grade) nn Guaranteed Failsafe Receiver Operation Over the Entire Common Mode Range nn Current Limited Drivers and Thermal Shutdown nn Delayed Micropower Shutdown: 5µA Maximum (C, I-Grade) nn Power Up/Down Glitch-Free Driver Outputs nn Low Operating Current: 900µA Maximum in Receive Mode nn Compatible with TIA/EIA-485-A Specifications nn Available in 8-Lead and 10-Lead 3mm × 3mm DFN and 8-Lead and 10-Lead MSOP Packages APPLICATIONS nn Low Power RS485/RS422 Transceiver nn Level Translator nn Backplane Transceiver L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. DESCRIPTION The LTC®2856-1, LTC2856-2, LTC2857-1, LTC2857-2, LTC2858-1 and LTC2858-2 are low power, RS485/RS422 transceivers operating on 5V supplies at maximum data rates of 20Mbps or 250kbps for low EMI. The receiver has a one-eighth unit load, supporting up to 256 nodes per bus (C, I-Grade), and a failsafe feature that guarantees a high output state under conditions of floating or shorted inputs. The driver 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 thermal shutdown. Enhanced ESD protection allows these parts to withstand ±15kV (human body model) on the transceiver interface pins without latchup or damage. PART NUMBER LTC2856-1 LTC2856-2 LTC2857-1 LTC2857-2 LTC2858-1 LTC2858-2 MAX DATA RATE (Mbps) 20 0.25 20 0.25 20 0.25 DUPLEX Half Half Full Full Full Full PACKAGE MSOP-8, DFN-8 MSOP-8, DFN-8 MSOP-8, DFN-8 MSOP-8, DFN-8 MSOP-10, DFN-10 MSOP-10, DFN-10 TYPICAL APPLICATION LTC2856-1 RO1 R RE1 VCC1 DE1 DI1 D GND1 LTC2856-1 RO2 R RE2 VCC2 DE2 DI2 D GND2 285678 TA01a LTC2858-1 at 20Mbps DI RT Y Z RT Y-Z 2V/DIV For more information www.linear.com/LTC2856-1 20ns/DIV 2856 TA01b 285678fg 1 LTC2856-1/LTC2856-2 LTC2857-1/LTC2857-2 LTC2858-1/LTC2858-2 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (VCC).................................... –0.3V to 7V Logic Input Voltages (RE, DE, DI)................. –0.3V to 7V Interface I/O (A, B, Y, Z)..................... (VCC – 15V) to 15V Receiver Output Voltage (RO)........–0.3V to (VCC + 0.3V) Operating Temperature Range (Note 4) LTC285xC................................................. 0°C to 70°C LTC285xI..............................................–40°C to 85°C LTC285xH........................................... –40°C to 125°C Storage Temperature Range MSOP................................................. –65°C to 150°C DFN........


LTC2857-1 LTC2857-2 LTC2858-1


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)