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RS-232 RS-422 RS-485 RS-644 PowerPoint Presentation
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RS-232 RS-422 RS-485 RS-644

RS-232 RS-422 RS-485 RS-644

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RS-232 RS-422 RS-485 RS-644

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  1. LINE INTERFACES RS-232 RS-422 RS-485 RS-644

  2. ANALOG PRODUCT MARKET Analog Market Forecast 2005 $B 36.4 Analog Market Breakdown 2000 $B 30.5 Source: ICE

  3. INTERFACES ICs • This category includes line drivers & receivers, keyboard, • encoders, error checking circuits, and display drivers. • Analysts predict a CAGR of only 6.6% till 2005. • Top 10 Manufacturers : Source: ICE

  4. SIGNALING RATE versus CABLE LENGTH Source: T.I.

  5. INTERFACES Ics MAIN STANDARDS Differential Single Ended Line Length (m) Source: STm

  6. DATA TRANSMISSION MODE Single-Ended Transmission (Unbalanced) Differential Transmission

  7. DATA TRANSMISSION TOPOLOGIES RS-644 (LVDS) RS-232 Point-to-Point Connection RS-423 RS-422 Multi-Drop Connection RS-485 Multi-Point Connection Using Multiple Transceiver

  8. RS-232 Data rate 512 Kbps (Std : 20 Kbps) Maximum line length 20 m Transmission mode Point to point Function Driver Receiver Transceiver ESD Protection Standard (8kV) or 15kV (human body model) Package SO SSOP Actors (3.3V) Maxim (Drv/Rcv): 0/1, 1/1, 2/2, 5/3, 3/5, 3/3,4/5. TI (Drv/Rcv): only 1part, sn75lv4737A(3/5) NSC(Drv/Rcv): only 1 part, DS14C335 (3/5)

  9. RS-485 Data rate 35 Mbps (Std : 10 Mbps) Maximum line length 1200 m Transmission mode Multipoint Function Driver Receiver Transceiver ESD Protection Standard (8kV) or 15kV (human body model) Package SO Actors (3.3V) Maxim (Drv/Rcv): 1/1, 0/4, 0/3 TI: no parts in low voltage NSC: no parts in low voltage

  10. RS-644 : LVDS Data rate : 655 Mbps Maximum line length 15 m Transmission mode Point to point Function Driver Receiver Transceiver Flat Panel Display Serdes ESD Protection Standard (8kV) or 15kV (human body model) Package SO SSOP TSSOP Actors (3.3V) NSC T.I. Maxim Pericom Fairchild

  11. RS-644 : LVDS LVDS L - Low V- Voltage D - Differential S - Signaling • Conforms to the TIA/EIA-644 Standard • Low Power, High Speed Differential Technology • ± 350mV voltage swing with 1.2V typical offset voltage • Serial data rates up to 655Mbs • Primarily used in point-to-point

  12. LVDS FUNCTION Source: Fairchild

  13. LVDS CROSS REFERENCE Source: Fairchild

  14. RECOMMENDED RS-422 AND RS-485 UPGRADES

  15. ACRONYMS • LVDS Low Voltage Differential Signaling • BLVDS Bus/Backplane Low Voltage Differential Signaling (NSC) • LVDM Low Voltage Differential Multi-drop (TI) • LVDT Low Voltage Differential w/Termination (TI) • MLVDS Multi-Point Low Voltage Differential Signaling (RS-xxx?) • SerDes Serializer/Deserializer • ANSI American National Standard Institute • TIA Telecommunication Industry Association • EIA Electronic Institute Association • RS-xxx Recognized Standard

  16. STANDARDS INTERFACES