MAX485. Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceiver PIN CONFIGURATION
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1 Low-Power, Slew-Rate-Limited RS-8/RS- Traceiver SRIPTION The MX8 is low-power traceivers for RS-8 and RS- communication. The I contai one driver and one receiver. The driver slew rates of the MX8 is not limited, allowing them to tramit up to.mbps. These traceivers draw between µ and µ of supply current when unloaded or fully loaded with disabled drivers. ll parts operate from a single supply. rivers are short-circuit current limited and are protected agait 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 the input is open circuit. The MX8 is designed for half-duplex applicatio. MX8 PIN ONFIGURTION GN OR P PKGE (Top iew) FETUS Low Quiescent urrent: µ -7 to + ommon-mode Input oltage Range Three-State Outputs Propagation elays, Skew Operate from a Single Supply llows up to Traceivers on the us ata rate:. Mbps urrent-limiting and Thermal Shutdown for river Overload Protection The tramitter outputs and receiver inputs are protected to ±k ir ES PPLITION Low-Power RS-8 Traceivers Low-Power RS- Traceivers Level Tralators Traceivers for EMI-Seitive pplicatio Industrial-ontrol Local rea Networks ORRING INFORMTION Temperature Range Package Orderable evice Package Qty to +7 SOP8L P8L Pb-Free MX8 MX8R MX8P Units/Tube Units/R&T Units/Tube pril. 7 Rev.
2 PIN SRIPTION MX8 No. Name Function GN Receive output: if > by m, will be high; if < by m, will be low. Receiver Output Enable. is enabled when is low; is high impedance when is high. river Output Enable. The driver outputs are enabled when is high. They are high impedance when is low. If the driver outputs are enabled, the parts function as line drivers. While they are high impedance, they function as line receivers if is low. river input. low on forces output low and output high. Similarly, a high on forces output high and output low. Ground 6 river Output and Receiver differential input. 7 river Output and Receiver differential input. 8 Positive Supply:.7 cc. FUNTION TLE Tramitting Receiving Inputs Outputs Inputs Outputs X X X Z Z open X Z Z X Z Z=high impedance X=don t care FUNTIONL GRM 6 7 Figure. Functional iagram pril. 7 Rev.
3 SOLUTE MXIMUM RTINGS MX8 Parameter Symbol alue Unit Supply oltage ontrol Input oltage river Input oltage river Output oltage (, ) Receiver Input oltage (, ) Receiver Output oltage 8-Pin Plastic P ontinuous Power issipation (derating 9.9mW/ above +7 ) 8-Pin SOP ontinuous Power issipation (derating.88mw/ above +7 ) Operating Temperature Range Storage Temperature Range Lead Temperature, sec I -. to (+.) -. to (+.) O -8 to +. RI -8 to to (+.) PP PSOP T TSTG TL 77 7 to +7-6 to +6 + mw mw ELETRIL HRTERISTIS ( = ±%, T = TMIN to TMX, unless otherwise noted.) (Notes, ) Parameter ifferential river Output (no load) ifferential river Output (with load) hange in Magnitude of river ifferential Output oltage for omplementary Output States river ommon-mode Output oltage hange in Magnitude of river ommon-mode Output oltage for omplementary Output States Input High oltage Input Low oltage Symbol Test onditio Min Typ Max Unit O O O O IH R = Ω (RS-) R = 7Ω (RS-8), Figure R = 7Ω or Ω, Figure... R = 7Ω or Ω, Figure O R = 7Ω or Ω, Figure. IL,,,, Input urrent IINI,, ±.8 μ pril. 7 Rev.
4 ELETRIL HRTERISTIS(ONTINUE) Parameter Input urrent (, ) Receiver ifferential Threshold oltage MX8 Symbol Test onditio Min Typ Max Unit IIN TH = ; = or. -7 M IN =. IN = m -.. Receiver Input Hysteresis TH M = 7 m Receiver Output High oltage OH IO = -m, I = m. Receiver Output Low oltage OL IO = m, I = -m. Three-State (high impedance) Output IOZR. O. ± μ urrent at Receiver Receiver Input Resistance RIN -7 M kω No-Load Supply urrent =, = or 9 I (Note ) =, = or μ river Short-ircuit urrent, O = High IOS -7 O m river Short-ircuit urrent, O = Low IOS -7 O m Receiver Short-ircuit urrent IOSR O 7 9 m SWITHING HRTERISTIS ( = ±%, T = TMIN to TMX, unless otherwise noted.) (Notes, ) Parameter river Input to Output Propagation delay time river Output Skew river Enable to Output High river Enable to Output Low river isable Time from Low river isable Time from High tplh - tphl ifferential Receiver Skew Receiver Enable to Output Low Symbol Test onditio Min Typ Max Unit tplh tphl tskew RFF = Ω L = L = pf RFF = Ω L = L = pf tzh L= pf, S closed 7 tzl L= pf, S closed 7 tlz L= pf, S closed 7 thz L= pf, S closed 7 RFF = Ω tsk L = L = pf tzl RL= pf, S closed 6 6 pril. 7 Rev.
5 SWITHING HRTERISTIS(ONTINUE) Parameter Receiver Enable to Output High Receiver isable Time from Low MX8 Symbol Test onditio Min Typ Max Unit tlz RL= pf, S closed Receiver isable Time from High thz RL= pf, S closed Maximum ata Rate fmx. Mbps Notes : ll currents into device pi are positive; all currents out of device pi are negative. ll voltages are referenced to device ground unless otherwise specified. : ll typical specification are gived for cc = and T = + : Supply current specification is valid for loaded tramitters when =. TYPIL PPLITION IRUIT tzh RL= pf, S closed MX8 R 8 7 Rt 6 GN Rt R Figure. Typical ircuit TEST IRUITS O R R O EIER OUTPUT RL pf + kω S S kω Figure. river Test Load Figure. Reveiver Timing Test Load I L RFF L OUTPUT LINER TEST + Ω L S S Figure. river / Reveiver Timing Test ircuit Figure 6. river Timing Test Load pril. 7 Rev.
6 MX8 Operation timing diagrams O. tplh tphl. /O, OL.. tlz tzl(shn),tzl OL+.. /O FF O -O 9% % tr FF=()-() tf tskew= tplh-tphl 9% %, O. tzh(shn),tzh thz OH -. Figure 7. river tramission elay timing Figure 8. river enable and disable timing. OH OL. OUTPUT. tzl(shn),tzl. tlz OL+. - I -I tphl INPUT tplh O. tzh(shn),tzh thz OH-. Figure 9. Receiver tramission elay timing Figure. Receiver enable and disable timing pril. 7 Rev. 6
7 θ PHYSIL MENSIONS SOP8L MX8 θ θ R θ R Symbol imeion(mm) Min Max (TYP).(TYP) (TYP) Symbol R R imeion(mm) Min Max...(TYP).(TYP)..6.7(TYP).7(TYP) 7 (TYP) (TYP) (TYP) (TYP) pril. 7 Rev. 7
8 MX8 P8L θ θ θ Symbol imeion(mm) Min Max Symbol imeion(mm) Min Max.(TYP).(TYP).(TYP).9..7(TYP).(TYP) (TYP).99(TYP) (TYP) 7.(TYP) 8 (TYP).. (TYP) pril. 7 Rev. 8
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