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MAX3442E Dataheets PDF



Part Number MAX3442E
Manufacturers Maxim
Logo Maxim
Description 15kV ESD-Protected / 60V Fault-Protected / 10Mbps / Fail-Safe RS-485/J1708 Transceivers
Datasheet MAX3442E DatasheetMAX3442E Datasheet (PDF)

MAX3440E–MAX3444E ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers General Description The MAX3440E–MAX3444E fault-protected RS-485 and J1708 transceivers feature ±60V protection from signal faults on communication bus lines. Each device contains one differential line driver with three-state output and one differential line receiver with three-state input. The 1/4-unitload receiver input impedance allows up to 128 transceivers on a single bus. The devices .

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MAX3440E–MAX3444E ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers General Description The MAX3440E–MAX3444E fault-protected RS-485 and J1708 transceivers feature ±60V protection from signal faults on communication bus lines. Each device contains one differential line driver with three-state output and one differential line receiver with three-state input. The 1/4-unitload receiver input impedance allows up to 128 transceivers on a single bus. The devices operate from a 5V supply at data rates of up to 10Mbps. True fail-safe inputs guarantee a logic-high receiver output when the receiver inputs are open, shorted, or connected to an idle data line. Hot-swap circuitry eliminates false transitions on the data bus during circuit initialization or connection to a live backplane. Short-circuit current-limiting and thermal shutdown circuitry protect the driver against excessive power dissipation, and on-chip ±15kV ESD protection eliminates costly external protection devices. The MAX3440E–MAX3444E are available in 8-pin SO and PDIP packages and are specified over industrial and automotive temperature ranges. Applications ●● RS-422/RS-485 Communications ●● Industrial Networks ●● Telecommunications Systems ●● HVAC Controls Features ●● ±15kV ESD Protection ●● ±60V Fault Protection ●● Guaranteed 10Mbps Data Rate (MAX3441E/MAX3443E) ●● Hot Swappable for Telecom Applications ●● True Fail-Safe Receiver Inputs ●● Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX3440E/MAX3442E/MAX3444E) ●● Allow Up to 128 Transceivers on the Bus ●● -7V to +12V Common-Mode Input Range ●● Automotive Temperature Range (-40°C to +125°C) ●● Industry-Standard Pinout Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3440EESA+ -40°C to +85°C 8 SO MAX3440EEPA+ -40°C to +85°C 8 PDIP MAX3440EASA+ -40°C to +125°C 8 SO MAX3440EAPA+ -40°C to +125°C 8 PDIP +Denotes a lead(Pb)-free/RoHS-compliant package. Ordering Information continued at end of data sheet. Selector Guide PART TYPE MAX3440E MAX3441E MAX3442E MAX3443E MAX3444E RS-485 RS-485 RS-485 RS-485 J1708 DATA RATE (Mbps) 0.25 2.5 to 10 0.25 2.5 to 10 0.25 LOW-POWER SHUTDOWN No No Yes Yes Yes RECEIVER/DRIVER ENABLE Yes Yes Yes Yes Yes TRANSCEIVERS ON BUS 128 128 128 128 128 HOT SWAP Yes Yes Yes Yes Yes (only RE) Pin Configurations and Typical Operating Circuits TOP VIEW + FAULT 1 RO 2 R DE/RE 3 DI 4 D + 8 VCC FAULT 1 7B RO 2 R 6 A DE/RE 3 5 GND DI 4 D 8 VCC 7B Rt 6 A 5 GND MAX3440E MAX3441E DIP/SO DIP/SO Pin Configurations and Typical Operating Circuits continued at end of data sheet. B Rt A DE/RE D DI R FAULT RO 19-2666; Rev 3; 4/14 MAX3440E–MAX3444E ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers Absolute Maximum Ratings Voltages Referenced to GND VCC.........................................................................................+7V FAULT, DE/RE, RE, DE, DE, DI, TXD....... -0..


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