LTC2859/LTC2861 20Mbps RS485 Transceivers with Integrated Switchable Termination Fea T Descrip T n Integrated, Logic-Selectable 120 T ermination The LTC 2859 and LTC2861 are low power, 20Mbps Resistor RS485/422 transceivers operating on 5V supplies. The n 20Mbps Max Data Rate receiver includes a logic-selectable 120 termination, n No Damage or Latchup to ESD: 15kV HBM one-eighth unit load supporting up to 256 nodes per bus n High Input Impedance Supports 256 Nodes (C-, I-grades), and a failsafe feature that guarantees a high (C-, I-Grades) output state under conditions of floating or shorted inputs. n Operation Up to 105C (LTC2859H) The driver features a logic-selectable low-EMI 250kbps n 250kbps Low-EMI Mode operating mode, and maintains a high output impedance n Guaranteed Failsafe Receiver Operation Over the over the entire common mode range when disabled or Entire Common Mode Range when the supply is removed. Excessive power dissipation n Current Limited Drivers and Thermal Shutdown caused by bus contention or a fault is prevented by current n Delayed Micropower Shutdown (5A Max) limiting all outputs and by a thermal shutdown. n Power Up/Down Glitch-Free Driver Outputs n Enhanced ESD protection allows the LTC2859 and LTC2861 Low Operating Current (900A Max in Receive Mode) n to withstand 15kV (human body model) on the transceiver Meets All TIA/EIA-485-A Specifications n interface pins without latchup or damage. Available in 10-Pin 3mm 3mm DFN, 12-Pin 4mm 3mm DFN and 16-Pin SSOP Packages p D T s T Gui De a T PART NUMBER DUPLEX PACKAGE n Low Power RS485/RS422 Transceiver LTC2859 Half DFN-10 n Level Translator LTC2861 Full SSOP-16, DFN-12 n Backplane Transceiver L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T LTC2859 LTC2859 LTC2859 at 20Mbps RO R R RO RE RE DI TE TE 120 DE 120 DE Y DI D D DI Z SLO SLO LTC2859 YZ 2859/61 TA01 120 285961 TA02 2V/DIV 20ns/DIV R D RORE TE DE DI SLO 285961fc 1 ion pplica ions pplica ion elec uc ro ion uresLTC2859/LTC2861 (Note 1) a T e m r a T Gs Supply Voltage (V ) ................................... 0.3V to 7V Operating Temperature (Note 4) CC Logic Input Voltages (RE, DE, DI, TE, SLO) .... 0.3V to 7V LTC2859C, LTC2861C .............................. 0C to 70C Interface I/O: LTC2859I, LTC2861I ............................40C to 85C A, B, Y, Z .......................................(V 15V) to +15V LTC2859H .......................................... 40C to 105C CC (A-B) or (B-A) with Terminator Enabled ..................6V Storage Temperature Range .................. 65C to 125C Receiver Output Voltage (RO) ........0.3V to (V +0.3V) Lead Temperature (Soldering, 10 sec) CC GN Package ......................................................300C p c Fi G T TOP VIEW TOP VIEW TOP VIEW 1 16 RO V CC RO 1 12 V CC 2 15 RE A RO 1 10 V RE 2 11 A CC 3 14 DE B RE 9 B 2 13 11 DE 3 10 B 4 13 DI Z DE 3 A 8 DI 4 9 Z 5 12 4 TE Y DI 7 SLO TE 5 8 Y TE 5 6 GND 6 11 GND SLO GND 6 7 SLO 7 10 NC NC DD PACKAGE 8 9 NC NC 10-LEAD (3mm 3mm) PLASTIC DFN DE PACKAGE EXPOSED PAD (PIN 11) PCB GND CONNECTION 12-LEAD (4mm 3mm) PLASTIC DFN GN PACKAGE T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 13) PCB GND CONNECTION 16-LEAD (NARROW 0.150) PLASTIC SSOP = 3C/W JC T = 125C, = 43C/W JMAX JA T = 125C, = 110C/W JMAX JA = 4.3C/W JC = 40C/W JC o r D i n F T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2861CDE PBF LTC2861CDE TRPBF 2861 0C to 70C 12-Lead (4mm 3mm) Plastic DFN LTC2861IDE PBF LTC2861IDE TRPBF 2861 40C to 85C 12-Lead (4mm 3mm) Plastic DFN LTC2861CGN PBF LTC2861CGN TRPBF 2861 16-Lead Plastic SSOP 0C to 70C LTC2861IGN PBF LTC2861IGN TRPBF 2861I 16-Lead Plastic SSOP 40C to 85C LTC2859CDD PBF LTC2859CDD TRPBF LBNX 0C to 70C 10-Lead (3mm 3mm) Plastic DFN LTC2859IDD PBF LTC2859IDD TRPBF LBNX 40C to 85C 10-Lead (3mm 3mm) Plastic DFN LTC2859HDD PBF LTC2859HDD TRPBF LBNX 40C to 105C 10-Lead (3mm 3mm) Plastic DFN Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: