3.3V Slew Rate Limited, Half and Full Duplex ADM3483/ADM3485/ADM3488/ADM3490

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1 Preliminary Technical ata 3.3V Slew ate Limited, Half and Full uplex M3483/M3485/M3488/M3490 FETUES EI S-485/S-422 Compliant ata ate Options M3483, M kbps M3485, M Mbps Half and Full uplex Options educed Slew ates for Low EMI 2n Supply Current in Shutdown Mode (M3483,M3485) Up to 32 Transceivers on a bus -7V to +12V us Common Mode ange Specified over 40 C to +85 C Temperature ange vailable in 8-Lead SOIC M3483/85 available in an 8-Lead LFCSP Package PPLICTIONS Low-Power S-485 pplications EMI Sensitive Systems TE-CE Interfaces Industrial Control Packet Switching Local rea Networks Level Translators GENEL ESCIPTION The M3483, M3485, M3488 and M3490 are 3.3V, low-power transceivers for S-485 and S-422 communication. Each part contains one driver and one receiver. The M3483 and M3488 feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The partially slew-rate-limited MX3486 transmits up to 2.5Mbps. The M3485 and M3490 transmit at up to 10Mbps. The drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if both inputs are open circuit. The M3488 and M3490 feature full duplex communication, while the M3483 and M3485 are designed for half-duplex communication. The driver outputs are slew rate limited in order to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit. The parts are fully specified over the commercial and industrial temperature ranges and all are available in 8-lead SOIC and the M3483 and the M3485 are also available in an 8-lead LFCSP packages. E E FUNCTIONL LOCK GMS M3483/M3485 V CC GN V CC M3488/M3490 GN Z Y Part No. Guaranteed ata ate (Mpbs) Supply Voltage (V) Half/Full uplex Slew-ate Limited river/ eciever Enable Shutdown Current (n) M Half Yes Yes 2 8 M Half No Yes to 3.6 M Full Yes No - 8 M Full No No - 8 Pin Count Table 1. Selection Table ev. Pr Information furnished by nalog evices is believed to be accurate and reliable. However, no responsibility is assumed by nalog evices 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 nalog evices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. ox 9106, Norwood, M , U.S.. Tel: Fax: nalog evices, Inc. ll rights reserved.

2 M3483/M3485/M3488/M3490 Preliminary Technical ata M3483/M3485/M3488/M3490 SPECIFICTIONS (V CC =3.3V ±0.3%, T = T MIN to T MX, unless otherwise noted.) Parameter Min Typ Max Units Test Conditions/Comments IVE ifferential Output Voltage, VO 2.0 V =100Ω (S-422), Figure 3 Vcc = 3.3V ±5% 1.5 V =54Ω (S-485), Figure V =60Ω (S-485), Vcc = 3.3V, Figure 4 VO for Complementary Output States 0.2 V =54Ω or 100Ω, Figure 3 Common Mode Output Voltage, VOC 3 V =54Ω or 100Ω, Figure 3 VOC for Complementary Output States 0.2 V =54Ω or 100Ω, Figure 3 IVE INPUT LOGIC CMOS Input Logic Threshold Low, VIH 0.8 V E,,E CMOS Input Logic Threshold High, VIL 2.0 V E,,E CMOS Logic Input Current, IN1 ±2 µ E,,E Input Current (,), IN2 1.0 m VIN = 12V E = 0V -0.8 m VIN = -7V VCC = 0V or 3.6V Output Leakage (Y,Z), IO 20 µ VIN = 12V E = 0V, E = 0V -20 µ VIN = -7V VCC = 0V or 3.6V Output Leakage (Y,Z) in Shudown Mode, IO 1 µ VIN = 12V E = 0V, E = 0V -1 µ VIN = -7V VCC = 0V or 3.6V ECEIVE ifferential Input Threshold Voltage, VTH V -7V<VCM<+12V Input Hysteresis, VTH 50 mv VCM=0V CMOS Output Voltage High, VOH Vcc 0.4 V IOUT= -1.5m VI = 200mV, Figure 5 CMOS Output Voltage Low, VOL 0.4 V IOUT= 2.5m, VI = 200mV, Figure 5 Three-State Output Leakage Current, IOZ ±1 µ Vcc = 3.6V, 0V VOUT Vcc Input esistance, IN 12 kω -7V<VCM<+12V POWE SUPPLY CUENT Supply Current m m E = VCC E = 0V or VCC E = VCC E = 0V No Load, = 0V or VCC Supply Current in Shutdown Mode, ISHN µ E = 0V, E = VCC, = VCC or 0V -250 m VOUT = -7V river Short-Circuit Output Current, IOS 250 m VOUT = 12V eceiver Short-Circuit Output Current, IOS ±8 ±60 m 0V < V < VCC ev.pr Page 2 of 14

3 Preliminary Technical ata M3483/M3485/M3488/M3490 TIMING SPECIFICTIONS-M3485/M3490 (V CC =3.3V, T = 25 ) Parameter Min Typ Max Units Test Conditions/Comments IVE ifferential Output elay, t ns L = 60Ω, Figure 6 ifferential Output Transition Time, tt ns L = 60Ω, Figure 6 Propagation elay, Low-to-High Level, tplh ns L = 27Ω, Figure 7 Propagation elay, High-to-Low Level, tphl ns L = 27Ω, Figure 7 tplh tphl Propagation elay Skew (Note 2), tps 8 ns L = 27Ω, Figure 7 IVE OUTPUT ENLE/SLE TIMES (M3485 ONLY) Output Enable Time Low Level, tpzl ns L = 110Ω, Figure 8 Output Enable Time High Level, tpzh ns L = 110Ω, Figure 8 Output Enable Time from High Level, tphz ns L = 110Ω, Figure 8 Output Enable Time from Low Level, tplz ns L = 110Ω, Figure 9 Output Enable Time from Shutdown to Low ns L = 110Ω, Figure 9 Level, tpsl Output Enable Time from Shutdown to High Level, tpsh ns L = 110Ω, Figure 8 TIMING SPECIFICTIONS-M3483/M3488 (V CC =3.3V, T = 25 ) Parameter Min Typ Max Units Test Conditions/Comments IVE ifferential Output elay, t ns L = 60Ω, Figure 6 ifferential Output Transition Time, tt ns L = 60Ω, Figure 6 Propagation elay, Low-to-High Level, tplh ns L = 27Ω, Figure 7 Propagation elay, High-to-Low Level, tphl ns L = 27Ω, Figure 7 tplh tphl Propagation elay Skew (Note 2), 100 ns L = 27Ω, Figure 7 tps IVE OUTPUT ENLE/SLE TIMES (M3485 ONLY) Output Enable Time Low Level, tpzl ns L = 110Ω, Figure 9 Output Enable Time High Level, tpzh ns L = 110Ω, Figure 8 Output Enable Time from High Level, tphz ns L = 110Ω, Figure 8 Output Enable Time from Low Level, tplz ns L = 110Ω, Figure 9 Output Enable Time from Shutdown to Low ns L = 110Ω, Figure 9 Level, tpsl Output Enable Time from Shutdown to High Level, tpsh ns L = 110Ω, Figure 8 ev.pr Page 3 of 14

4 M3483/M3485/M3488/M3490 Preliminary Technical ata TIMING SPECIFICTIONS (V CC =3.3V, T = 25 ) Parameter Min Typ Max Units Test Conditions/Comments ECEIVE Time to Shutdown, tshn ns M3483/M3485 only, Note 3 Propagation elay, Low-to-High Level, tplh ns VI = 0V to 3.0V, CL = 15pF, Figure ns M3483/M3488 only. Propagation elay, High-to-Low Level, tphl ns VI = 0V to 3.0V, CL = 15pF, Figure ns M3483/M3488 only. tplh tphl Propagation elay Skew, tps 10 ns VI = 0V to 3.0V, CL = 15pF, Figure ns M3483/M3488 only. Output Enable Time to Low Level, tpzl Output Enable Time to High Level, tpzh Ouput isable Time from High Level, tphz Ouput isable Time from Low Level, tplz Output Enable Time from Shutdown to Low Level, tpsl Output Enable Time from Shutdown to High Level, tpsh ns CL = 15pF, Figure 11, M3483/M3485 only ns CL = 15pF, Figure 11, M3483/M3485 only ns CL = 15pF, Figure 116, M3483/M3485 only ns CL = 15pF, Figure 11, M3483/M3485 only ns CL = 15pF, Figure 11, M3483/M3485 only ns CL = 15pF, Figure 11, M3483/M3485 only Note1: VO and VOC are the changes in VO and VOC, respectively, when input changes state. Note 2: Measured on tplh (Y) - tphl (Y) and tplh (Z) - tphl (Z). Note 3: The transceivers are put into shutdown by bringing E high and E low. If the inputs are in this state for less than 80ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the part are guaranteed to have entered shutdown. ev.pr Page 4 of 14

5 Preliminary Technical ata 1SOLUTE MXIMUM TINGS Table 2. (T = 25 C unless otherwise noted) Parameter VCC to GN igital I/O Voltage (E, E,, UT) river Output/eceiver Input Voltage Operating Temperature ange Storage Temperature ange ating T T T -40 C to +85 C -65 C to +125 C θj Thermal Impedance SOIC 110 C/W LFCSP 62 C/W Lead Temperature Soldering (10 sec) 300 C Vapour Phase (60 sec) 215 C Infrared (15 sec) 220 C M3483/M3485/M3488/M3490 Stresses above those listed under bsolute Maximum atings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ev.pr Page 5 of 14

6 M3483/M3485/M3488/M3490 Preliminary Technical ata PIN CONFIGUTIONS N FUNCTION ESCIPTIONS E E M3483 M3485 TOP VIEW (Not to Scale) V CC GN V CC GN M3488 M3490 TOP VIEW (Not to Scale) Z Y Table 3. M3483/M3485 Pin escriptions Pin No. Mnemonic escription 1 eceiver Output. When enabled, if > by 200 mv, then = high. If < by 200 mv, then = low. 2 E eceiver Output Enable. low level enables the receiver output,. high level places it in a high impedance state. 3 E river Output Enable. high level enables the driver differential inputs and. low level places it in a high impedance state. 4 river Input. When the driver is enabled, a logic low on forces low and high while a logic high on forces high and low. 5 GN Ground. 6 Noninverting eceiver Input /river Output. 7 Inverting eceiver Input /river Output. 8 VCC 5 V Power Supply. Table 4. M34884/M3490 Pin escriptions Pin No. Mnemonic escription 1 VCC 5 V Power Supply. 2 eceiver Output. When enabled, if > by 200 mv, then = high. If < by 200 mv, then = low. 3 river Input. When the driver is enabled, a logic low on forces low and high while a logic high on forces high and low. 4 GN Ground. 5 Y river Noninverting Output. 6 Z river Inverting Output. 7 eceiver Inverting Input. 8 eceiver Noninverting Input. ES CUTION ES (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. lthough this product features proprietary ES protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ES precautions are recommended to avoid performance degradation or loss of functionality. ev.pr Page 6 of 14

7 Preliminary Technical ata M3483/M3485/M3488/M3490 TEST CICUITS N SWITCHING CHCTEISTICS Figure 3. river VO and VOC Figure 6. river ifferential Output elay and Transition Times Figure 4. river VO with Varying Common-Mode Voltage Figure 5. eceiver VOH and VOL Figure 7. river Propagation elays ev.pr Page 7 of 14

8 M3483/M3485/M3488/M3490 Preliminary Technical ata Figure 8. river Enable and isable Times (tpzh, tpsh, tphz) Figure 10. eceiver Propagation elay Figure 9. river Enable and isable Times (tpzl, tpsl, tplz) ev.pr Page 8 of 14

9 Preliminary Technical ata M3483/M3485/M3488/M3490 Figure 11. eceiver Enable and isable Times ev.pr Page 9 of 14

10 M3483/M3485/M3488/M3490 Preliminary Technical ata TYPICL PEFOMNCE CHCTEISTICS Figure 1. Output Current vs. eceiver Output Low Voltage Figure 4. eceiver Output Low Voltage vs. Temperature Figure 2. Output Current vs. eceiver Output High Voltage Figure 5. river Output Current vs. ifferential Output Voltage Figure 3. eceiver Output High Voltage vs. Temperature Figure 6. river ifferential Output Voltage vs. Temperature ev.pr Page 10 of 14

11 Preliminary Technical ata M3483/M3485/M3488/M3490 Figure 7. Output Current vs. river Output Low Voltage Figure 10. Shutdown Current vs. Temperature Figure 8. Output Current vs. river Output High Voltage Figure 11. T Figure 9.Supply Current vs. Temperature Figure 12. T ev.pr Page 11 of 14

12 M3483/M3485/M3488/M3490 CICUIT ESCIPTION The M3483/M3485/M 3488/M3490 are lowpower transceivers for S-485 and S-422 communications. The M3483 and M3488 can transmit and receive at data rates up to 250kbps, and the M3485/ M3490 at up to 10Mbps. The M3488/ M3490 are full-duplex transceivers, while the M3483/M3485 are half-duplex. river Enable (E) and eceiver Enable (E) pins are included on the M3483/M3485. When disabled, the driver and receiver outputs are high impedance. EVICES WITH ECEIVE/IVE ENLES (M3483/M2485) Inputs Outputs E E * * Mode X Normal X Normal 0 0 X High-Z High-Z Normal 1 0 X High-Z High-Z Shutdown Table x. Transmitting Truth Table Inputs Outputs Mode E E, 0 0* +0.2V 1 Normal 0 0* -0.2V 0 Normal 0 0* Inputs Open 1 Normal 1 0 x High-Z Shutdown Table x. eceiving Truth Table EVICES WITHOUT ECEIVE/IVE ENLES (M3488/M2490) Input Outputs Z Y Table x. Transmitting Truth Table Input Outputs, Inputs Open 1 Table x. eceiving Truth Table Preliminary Technical ata EUCE EMI N EFLECTIONS (M3483/ M3488) The M3483/M3488 are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. LOW-POWE SHUTOWN MOE (M3483/M3485) low-power shutdown mode is initiated by bringing both E high and E low. The devices will not shut down unless both the driver and receiver are disabled (high impedance). In shutdown, the devices typically draw only 2n of supply current. For these devices, the tpsh and tpsl enable times assume the part was in the low-power shutdown mode; the tpzh and tpzl enable times assume the receiver or driver was disabled, but the part was not shut down. IVE OUTPUT PTECTION Excessive output current and power dissipation caused by faults or by bus contention are prevented by two methods. foldback current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range (see Typical Performance Characteristics). In addition, a thermal shutdown circuit forces the driver outputs into a highimpedance state if the die temperature rises excessively. PPGTION ELY Skew time is simply the difference between the low-to-high and high-to-low propagation delay. Small driver/receiver skew times help maintain a symmetrical mark-space ratio (50% duty cycle). The receiver skew time, tplh - tphl, is under 10ns (20ns for the M3483/M3488). The driver skew times are 8ns for the M485/M3490, and typically under 100ns for the M3483/M3488. LINE LENGTH VS. T TE The S-485/S-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Figure 13. TYPICL PPLICTIONS The M3483, M3485, M3488 and M3490 transceivers are designed for bidirectional data communications on multipoint bus transmission lines. Figures 11 and 12 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 13. To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. The slew-rate-limited M3483/M3488 are more tolerant of imperfect termination. ev.pr Page 12 of 14

13 Preliminary Technical ata M3483/M3485/M3488/M3490 MXIMUM NUME OF TNSCEIVES ON US: 32 M3483/M3485 M3483/M3485 E E E E Figure 11. M3483/M3485 Typical S-485 Network MSTE MXIMUM NUME OF NOES: 32 SLVE E M3488/M3490 Y Z M3488/M3490 E E Z Y E Z Y Z Y SLVE SLVE E E E E Figure 12. M3488/M3490 Full uplex S-485 Network M3488/M3490 E T IN E Z Y T OUT Figure 13. Line epeater for M3488/M3490 ev.pr Page 13 of 14

14 M3483/M3485/M3488/M3490 Preliminary Technical ata OUTLINE MENSIONS 5.00 (0.1968) 4.80 (0.1890) 4.00 (0.1574) 3.80 (0.1497) (0.2440) 5.80 (0.2284) 0.25 (0.0098) 0.10 (0.0040) COPLNITY (0.0500) SC SETING PLNE 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) 0.25 (0.0098) 0.17 (0.0067) (0.0196) 0.25 (0.0099) (0.0500) 0.40 (0.0157) Figure 6. 8-Lead Standard Small Outline Package [SOIC] (-8) imensions shown in millimeters Figure 7. 8-Lead Lead Frame Chip Scale Package [LFCSP] (CP-8) imensions shown in millimeters OEING GUIE Model Temperature ange Package Type randing M C to +85 C -8 M3483CP 40 C to +85 C CP-8 M C to +85 C -8 M3485CP 40 C to +85 C CP-8 M C to +85 C -8 M C to +85 C nalog evices, Inc. ll rights reserved. Trademarks and registered trademarks are the property of their respective companies. Printed in the U.S.. ev.pr Page 14 of 14

3.3 V Slew Rate Limited, Half Duplex RS-485/RS-422 Transceiver ADM3493

3.3 V Slew Rate Limited, Half Duplex RS-485/RS-422 Transceiver ADM3493 3.3 V Slew ate Limited, Half uplex S-485/S-422 Transceiver M3493 FETUES Operates with 3.3 V supply Interoperable with 5 V logic EI S-422 and S-485 compliant over full CM range ata rate: 25 kbps Half duplex