MAX13487EESA+T - 5V RS-485/RS-422 Transceiver | Maxim Integrated
Teilenummer: MAX13487EESA+T ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MAX13487EESA+T Übersicht
An RS-485/RS-422 transceiver is a differential interface IC that converts single-ended logic signals into differential bus signals, sitting within the interface IC hierarchy of serial communications semiconductors. Half-duplex RS-485 transceivers share one differential pair for both transmit and receive, so direction control is a key architectural decision. Traditional parts require a microcontroller GPIO to drive the DE/RE pins; the MAX13487E instead uses Maxim's AutoDirection architecture, which senses the driver input and enables the driver automatically.
Key features include true fail-safe receiver circuitry guaranteeing a logic-high receiver output when inputs are shorted, open, or idle, hot-swap capability that eliminates false transitions on the bus during power-up or live insertion, and ±15kV ESD protection on the transceiver pins. The /SHDN pin reduces supply current for low-power systems, and /DI, /RE and /SHDN pins are rated from -0.3V to +6V, allowing direct interfacing with 3.3V microcontrollers without level shifting.
Architecturally, the device integrates one driver and one receiver operating from a +5V supply, with receiver input being 1/8 unit load, permitting up to 256 transceivers on a shared bus (per Cosine reference to equivalent-class devices). AutoDirection removes firmware overhead and timing errors associated with GPIO direction switching in polled half-duplex protocols.
Typical applications include industrial fieldbus and Profiling nodes, building automation and HVAC controllers, motor/drive networks, battery-management stacks, and embedded metering where robust differential communication over long cables is required.
Design consideration: the hot-swap feature matters when nodes are inserted into a live backplane; for software-controlled designs a conventional DE/RE part may be preferred instead. Verify bus biasing resistors for idle-state fail-safe operation.
This page synthesizes distributor availability data, cross-reference findings, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für MAX13487EESA+T – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
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Modelle derselben Serie, die drop-in-kompatibel sind mit MAX13487EESA+T (gleiche Bauform und Footprint) – abweichend in Package, Supply Voltage.
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MAX13488EESA+T
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MAX13487EESA+
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MAX13487EESA+T Technische Daten
| Product Type | Half-Duplex RS-485/RS-422 Transceiver |
| Direction Control | AutoDirection (automatic) |
| Versorgungsspannung | +5 V |
| Datenrate | 500 kbps |
| Drivers / Receivers | 1 / 1 |
| Duplex Mode | Half |
| ESD Protection | +/-15 kV (HBM) |
| Hot-Swap Capability | Yes |
| Fail-Safe Receiver | Yes (short, open, idle) |
| Logic Pin Voltage Range (/SHDN, /RE, /DI) | -0.3 V to +6 V |
| Gehäuse | 8-SOIC (0.154 in / 3.90 mm width), NSOIC |
| Montageart | Surface Mount |
| Receiver Input Impedance | 1/8 unit load (256 transceivers on bus) |
| Reel Packaging | Tape and Reel (+T suffix) |
MAX13487EESA+T 8-soic (0.154 in / 3.90 mm width), nsoic Pinbelegungsleitfaden
Pinbelegung für MAX13487EESA+T (8-soic (0.154 in / 3.90 mm width), nsoic-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für MAX13487EESA+T.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MAX13487EESA+T ist geeignet für 6 Anwendungs: Industrial Fieldbus and MODBUS RTU Networks, Building Automation and HVAC Controllers, Battery Management and Energy Storage Stacks, Motor Drives and Industrial Motion Control, Smart Metering and Utility Data Concentrators, Security, Access Control, and Surveillance Panels.
Industrial Fieldbus and MODBUS RTU Networks
The MAX13487EESA+T fits industrial RS-485 fieldbus nodes because its 500 kbps data rate comfortably covers MODBUS RTU (typically 9.6-115.2 kbps) with timing margin, and its +/-15kV ESD protection survives the electrically noisy factory floor. AutoDirection control removes the MCU GPIO and firmware timing that classic DE/RE transceivers require, eliminating direction-turnaround bugs in polled master/slave protocols. Placed between the MCU UART and the twisted-pair bus with 120-ohm termination and fail-safe biasing resistors, the hot-swap input structure prevents bus glitches when a node card is inserted into a live backplane. The 1/8-unit-load receiver permits dense multi-drop networks of up to the RS-485 node limit without overloading the driver.
Empfohlen
Building Automation and HVAC Controllers
Building automation controllers, thermostats, and HVAC rooftop units commonly interconnect over RS-485 (BACnet MS/TP, MODBUS). The MAX13487EESA+T's +5V operation matches legacy 5V controller supplies, while its logic pins rated -0.3V to +6V allow direct hookup to a 3.3V microcontroller without a level shifter, saving BOM cost in mixed-voltage designs. AutoDirection control simplifies the firmware of thermostat-class MCUs where UART direction timing is error-prone. Its fail-safe receiver outputs a defined logic level when the bus is idle, open, or shorted, so an offline segment does not produce garbage bytes. The hot-swap capability protects the shared MS/TP bus during live service replacement of controllers, a routine event in occupied buildings.
Empfohlen
Battery Management and Energy Storage Stacks
Daisy-chained BMS slave boards across battery modules use isolated or non-isolated RS-485 links to report cell voltages and temperatures. The MAX13487EESA+T suits these links with its 500 kbps data rate for fast full-stack polling and its +/-15kV ESD robustness against charge transients during module handling. The /SHDN pin allows the transceiver to be powered down between polling cycles, conserving housekeeping power in battery-backed nodes. AutoDirection means the low-power slave MCU need not dedicate a GPIO or precise timing to bus turnaround, reducing firmware complexity on small 8-bit controllers. Verify isolation strategy separately: this transceiver is non-isolated, so pair it with a digital isolator or isolated DC-DC where galvanic isolation is mandated.
Empfohlen
Motor Drives and Industrial Motion Control
Variable-frequency drives, servo amplifiers, and motion controllers exchange setpoints and status over RS-485 in noisy environments near PWM-switched power stages. The MAX13487EESA+T's differential signalling rejects common-mode noise, and its fail-safe receiver keeps the UART idle-detector stable if the communications cable is disconnected during commissioning. Hot-swap capability prevents false start bits when the drive's communications card is hot-plugged in a live cabinet. At 500 kbps, cyclic polling of drive parameters completes quickly enough for most motion-coordination schemes that do not require real-time fieldbus performance. The +/-15kV ESD rating helps withstand discharge events during maintenance in dry industrial facilities.
Empfohlen
Smart Metering and Utility Data Concentrators
Electricity, water, and heat meters frequently expose an RS-485 service port per metering standards. The MAX13487EESA+T fits meter mainboards thanks to its 5V supply heritage, compact SOIC-8 footprint on dense two-layer meter PCBs, and low external component count - typically only termination and fail-safe bias resistors around the bus pins. AutoDirection control is valuable in meter firmware where the UART direction pin is a frequent source of poll/response collisions during protocol upgrades. The 1/8-unit-load receiver input supports meter clusters wired in long multi-drop strings back to a data concentrator. Its +/-15kV ESD tolerance addresses handling-induced discharge during meter installation and field servicing.
Empfohlen
Security, Access Control, and Surveillance Panels
Access-control panels, door controllers, and PTZ camera buses historically run RS-485 (e.g., Pelco-D style protocols) over long cable runs. The MAX13487EESA+T is well matched here: 500 kbps covers all common panel protocols, the differential receiver tolerates the long untwisted legacy cabling often found in retrofits, and fail-safe receiver operation prevents spurious characters when a camera or reader is unplugged. AutoDirection removes per-byte direction switching in half-duplex polled loops. The +/-15kV ESD protection is a practical benefit at outdoor camera drops subject to static discharge. The small SOIC-8 package suits compact reader and door-interface boards where PCB area is constrained.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX13487EESA+T – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX13488EESA+T | MAX13487EESA+ | COS13487EESA |
|---|---|---|---|---|
| Package | SOIC-8 (NSOIC, 3.90 mm) | SOIC-8 (NSOIC, 3.90 mm) - same | SOIC-8 (NSOIC, 3.90 mm) - same | SOP-8 - same footprint |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Cosine |
| Direction Control | AutoDirection (automatic) | Conventional DE/RE (MCU GPIO) | AutoDirection (automatic) | AutoDirection (internal auto-sensing) |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 500 kbps |
| Supply Voltage | +5 V | +5 V | +5 V | 3.0 V to 5.5 V |
| ESD Protection | +/-15 kV HBM | +/-15 kV HBM | +/-15 kV HBM | +/-15 kV HBM |
Wichtigste Unterscheidungsmerkmale
- AutoDirection control removes the direction GPIO entirely (vs. MAX13488EESA+T)
- True drop-in second source availability (vs. COS13487EESA)
- Hot-swap live-insertion protection (vs. Generic DE/RE transceivers (e.g., THVD1550))
Designhinweise
Do not treat the MAX13487E like a DE/RE transceiver: there is no driver-enable pin to poll. If your firmware already manages direction timing via GPIO (common in legacy designs), the MAX13488E with conventional DE/RE control may integrate more cleanly. Also remember the bus side is 5V-referenced - only the /SHDN, /RE and /DI logic pins are 3.3V tolerant (rated -0.3V to +6V per the Analog Devices EngineerZone FAQ). Do not exceed 500 kbps; exceeding the rated data rate with long stubs causes bit errors that AutoDirection cannot correct.
Use the standard RS-485 network topology: 120-ohm termination resistors at both physical cable ends, and fail-safe bias resistors (typically 560 ohms to +5V and 560 ohms to GND at one node) so the receiver output is defined on an idle bus. Place 0.1uF supply decoupling directly at the VCC pin and route the differential pair A/B as a matched pair away from switching-node traces. The SOIC-8 land pattern allows straightforward second-sourcing with the COS13487EESA without layout change.
The transceiver operates from a +5V rail; verify decoupling and rail sequencing when the node shares supply with 3.3V logic. Use the /SHDN pin to cut supply current during idle periods in battery-backed nodes - this is the family's power-saving mechanism since there is no low-quiescent-current variant in this listing. Estimated: a 5V node with multiple transceivers plus terminations draws most of its current in the termination resistors (60 ohms across the bus corresponds to roughly 83 mA at 5V during active drive), so budget the supply for worst-case bus load, not just IC quiescent current.
Compliance-Informationen
Compliance status was not stated in the provided web data. Verify RoHS/REACH status on the Analog Devices product page or certificate of conformance before ordering.
