MAX3070EEPD+ - 3.3V Fail-Safe RS-485 Transceiver | Analog Devices
MPN: MAX3070EEPD+ ✓ NakahandaMAX3070EEPD+ Ulas
An RS-485/RS-422 transceiver is an interface IC that converts between digital logic signals and balanced differential bus signals. The MAX3070EEPD+ belongs to the interface transceiver hierarchy, combining a line driver, line receiver, protection circuitry, and fail-safe logic in one package. Balanced signaling improves noise immunity and permits reliable data transfer over longer cable runs than single-ended interfaces in electrically noisy environments.
The principal features are a 3.3 V operating supply, one-driver/one-receiver configuration, and a maximum data rate of 250 kbps. The ±15 kV ESD rating helps protect the bus-facing pins from electrostatic discharge encountered during installation or maintenance. Fail-safe circuitry guarantees a logic-high receiver output when the receiver inputs are open or shorted, avoiding an indeterminate logic state on an idle or faulted bus.
The MAX3070EEPD+ is designed for RS-485 and RS-422 networks that require a low-noise, fault-tolerant differential interface. Its one-driver, one-receiver organization can support half-duplex communication when the direction of data flow is controlled by an external transceiver-enable circuit. The device also supports hot-plug behavior, which is useful in systems where an attached node may connect or disconnect while the bus is active.
Typical applications include industrial sensor networks, factory automation equipment, building-control systems, data acquisition units, instrument interfaces, and embedded serial links. A 3.3 V microcontroller or processor can use the transceiver to connect a logic-level UART to a field bus while receiving differential bus signals through the receiver channel.
Designers should confirm the receiver and driver enable polarity, bus termination, grounding, and connector arrangement before layout. The ±15 kV protection rating applies to specified ESD conditions; it does not replace surge protection for the complete installation. Keep the ground reference consistent across connected equipment and use twisted-pair wiring for the differential bus.
This page consolidates device specifications, package and application guidance, parameter comparisons, and engineering design notes into a focused engineering reference for selecting and implementing the MAX3070EEPD+ in 3.3 V RS-485 and RS-422 systems.
Mga alternatibo na pwedeng ilagay na MAX3070EEPD+ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
MAX3071EEPD+
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MAX3072EEPD+
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MAX3073EEPD+
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MAX3074EEPD+
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MAX3075EEPD+
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MAX3070EEPD+ Mga Spesipikasyon
| Product Type | RS-485/RS-422 transceiver |
| Volte ng Pagbibigay | 3.3 V nominal |
| Operating Supply Voltage Range | 2.97 V to 3.63 V |
| Driver Count | 1 driver |
| Receiver Count | 1 receiver |
| Maximum Data Rate | 250 kbps |
| ESD Protection | ±15 kV |
| Interface Standards | RS-422 and RS-485 |
| Fail-Safe Receiver | Yes; logic-high output for open or shorted receiver inputs |
| Hot-Swap Support | Yes |
| Packhaging | 14-pin PDIP |
| Terminal Count | 14 terminals |
| Uri ng Pagpapasok | Through-hole |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
Gabay sa Pin Configuration ng MAX3070EEPD+ rectangular
Pin configuration para sa MAX3070EEPD+ (rectangular package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa MAX3070EEPD+.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
MAX3070EEPD+ ay nararapat para sa 6 aplikasyons: Industrial Sensor Bus, Factory Automation Equipment, Building Control Network, Data Acquisition Unit, Embedded Serial Communication, Instrumentation and Test Equipment.
Industrial Sensor Bus
The MAX3070EEPD+ fits industrial sensor nodes that communicate over a 3.3 V RS-485 bus because it combines one driver and one receiver with ±15 kV ESD protection. Place it between the UART and differential bus, with external direction control for half-duplex operation. Its fail-safe receiver produces a defined high state when the bus inputs are open or shorted, while the 250 kbps maximum rate supports moderate-speed telemetry without demanding a high-speed transceiver.
Inirekomenda
Factory Automation Equipment
Factory automation controllers often connect meters, drives, and remote I/O through balanced RS-485 links. The MAX3070EEPD+ provides a 2.97 V to 3.63 V operating supply, one differential driver, one differential receiver, and a 250 kbps data-rate ceiling. Its ±15 kV ESD protection is valuable around factory wiring, while fail-safe behavior provides a deterministic receiver state when a cable is disconnected or faults.
Inirekomenda
Building Control Network
The MAX3070EEPD+ is suitable for building-control nodes carrying HVAC, lighting, and occupancy-controller commands over a low-speed differential bus. The 3.3 V supply matches modern embedded controllers, and the 250 kbps limit is appropriate for supervisory and status traffic rather than high-bandwidth payloads. ESD protection improves resilience in equipment rooms, while the fail-safe receiver helps the controller interpret an inactive or faulted field bus consistently.
Inirekomenda
Data Acquisition Unit
A data-acquisition unit can use the MAX3070EEPD+ to connect a 3.3 V processing engine to an RS-485 instrument bus. One driver supports command transmission and one receiver accepts measurement results or acknowledgements. The device's 250 kbps maximum rate suits aggregated laboratory and process data, and ±15 kV ESD protection adds a useful interface layer against electrostatic discharge encountered during sensor installation.
Inirekomenda
Embedded Serial Communication
The MAX3070EEPD+ bridges a conventional UART and a balanced field-bus network in embedded equipment. A 3.3 V MCU can drive the logic side while an external enable circuit controls the one-driver channel for half-duplex communication. At up to 250 kbps, the interface supports command, diagnostic, and status traffic. Its fail-safe receiver logic is particularly helpful in remote equipment where cable faults must not leave the host reading an undefined level.
Inirekomenda
Instrumentation and Test Equipment
Laboratory and field-test instruments often need a robust differential port for remote fixtures or distributed measurement nodes. The MAX3070EEPD+ offers a 3.3 V transceiver with one driver, one receiver, ±15 kV ESD protection, and a 250 kbps maximum rate. The fail-safe receiver simplifies system-state interpretation after open- or short-circuit faults, while the through-hole PDIP package is convenient for industrial daughterboards and prototype assemblies.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MAX3070EEPD+ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MAX3071EEPD+ | MAX3072EEPD+ | MAX3073EEPD+ | MAX3074EEPD+ | MAX3075EEPD+ |
|---|---|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin Flexibility | 14-pin Flexibility | 14-pin Flexibility |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage | 2.97 V to 3.63 V | 2.97 V to 3.63 V | 2.97 V to 3.63 V | 2.97 V to 3.63 V | 2.97 V to 3.63 V | 2.97 V to 3.63 V |
| Driver Count | 1 driver | 1 driver | 1 driver | 1 driver | 1 driver | 1 driver |
| Receiver Count | 1 receiver | 2 receivers | 2 receivers | 1 receiver | 1 receiver | 2 receivers |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| Fail-Safe Receiver | Yes | Yes | Yes | Yes | Yes | Yes |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes | Yes |
Pangunahing mga Pagkakaiba
- One-driver and one-receiver arrangement in a through-hole package (kumpara saMAX3071EEPD+)
- 14-pin PDIP PCB footprint (kumpara saMAX3070EESD+)
- 250 kbps maximum data rate (kumpara saMAX3074EEPD+)
- Fail-safe and hot-swap bus protection (kumpara saMAX3072EEPD+)
Talaan ng Disenyo
Route the MAX3070EEPD+ driver and receiver traces as a matched differential pair, using the same impedance and geometry over as much of the route as practical. Keep the transceiver close to the connector and away from switching nodes. The device uses through-hole pins, so place it where component height and lead-bend requirements remain compatible with the enclosure and the rest of the board assembly.
Do not assume that ±15 kV ESD protection eliminates the need for external surge suppression. The ESD rating covers specified electrostatic-discharge conditions, while RS-485 cables can also encounter lightning or switching transients. Confirm the bus topology, cable length, grounding strategy, connector selection, and protection requirements for the installation before releasing the PCB.
For reliable operation, use twisted-pair wiring, a common reference ground, and termination appropriate to the cable impedance and topology. The fail-safe receiver provides a defined output for open or shorted inputs, but it does not correct poor grounding or excessive noise. Validate receiver thresholds, enable timing, and bus contention with the intended baud rate and cable length.
Decouple the 3.3 V supply close to the device with the capacitance and placement specified by the manufacturer application guidance. Keep return-current paths short and connect the transceiver ground reference to the board ground plane. Because several MAX307xE family members support different enable and receiver functions, verify the exact logic polarity before assigning control signals.
Impormasyon ng Pagsunod sa Kautusan
The manufacturer material identifies the MAX3070E family as 3.3 V ESD-protected RS-485/RS-422 transceivers. No explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified in the cited product-page summary.