ISL3283EFHZ-T - ±16.5kV ESD, 20Mbps RS-485 Receiver, SOT-23-6 | Renesas
MPN: ISL3283EFHZ-T ✓ NakahandaISL3283EFHZ-T Ulas
An RS-485/RS-422 receiver is a differential line receiver that translates balanced differential signals transmitted over twisted-pair cabling into single-ended logic levels compatible with UARTs, MCUs, and FPGAs. RS-485 receivers belong to the broader interface IC family, which sits within the integrated circuits hierarchy as a bridge between digital controllers and physical communication media in industrial networks, building automation, and process control systems.
Key features include ±16.5kV IEC61000-4-2 ESD protection on bus pins, 20Mbps signaling rate, true 1/8 unit load for high-node-count networks, full fail-safe (open, shorted, terminated but idle bus) receiver thresholds, and an extended industrial -40°C to +125°C operating temperature range. The SOT-23-6 footprint is one of the smallest packages available for isolated RS-485 receivers, enabling dense PCB layouts.
The ISL3283E uses a precision differential comparator architecture with hysteresis and integrated IEC61000 ESD protection structures. The low-bus-current design reduces loading on the differential pair, supporting 256-node multi-drop configurations that exceed the standard 32-node RS-485 limit, simplifying daisy-chained industrial sensor networks.
Typical applications include industrial fieldbus networks (Profibus, Modbus), building automation (BACnet, LonWorks), HVAC controllers, security system data links, and any point-to-point or multi-drop RS-485 link requiring high ESD immunity in electrically harsh environments.
When designing, add a 100nF decoupling capacitor close to VCC and ensure the enable pin is tied high (inactive) or driven by the controller for power savings. The 1/8 unit load allows up to 256 nodes, but verify that total termination and stub length budgets remain within TIA/EIA-485-A guidelines.
This page synthesizes distributor pricing, drop-in cross-brand alternatives, and practical PCB layout notes that go beyond the manufacturer datasheet's typical application section.
Mga alternatibo na pwedeng ilagay na ISL3283EFHZ-T — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
ISL3283EFHZ-T7A
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL3283EIHZ-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL3282EFHZ-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3283EESA+
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3283EESA+T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX3283EESA/V+
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL3283EFHZ-T Mga Spesipikasyon
| Fungsi | RS-485/RS-422 Receiver |
| Protocol | RS-422, RS-485 |
| Number of Receivers | 1 |
| Rate ng Data | 20 Mbps |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| Bus Current (1/8 unit load) | +125 µA / -100 µA |
| ESD Protection (Bus Pins) | ±16.5 kV IEC61000-4-2 |
| Fail-Safe | Full fail-safe (open/shorted/idle) |
| Receiver Enable Pin | Active-low (/RE) |
| Maximum Nodes on Bus | 256 |
| Temperature na Operasyon | -40 °C to +125 °C |
| Packhaging | SOT-23-6 |
| Uri ng Pagpapasok | Surface Mount |
| Tindminan RoHS | Compliant |
Pin Configuration ng ISL3283EFHZ-T
| Pin 1 | RO — Receiver Output (CMOS logic, referenced to VCC) |
| Pin 2 | /RE — Receiver Enable, active-low (logic low = receiver enabled, high = high-Z output) |
| Pin 3 | GND — Ground reference |
| Pin 4 | A — Non-inverting differential bus input (RS-485/RS-422) |
| Pin 5 | B — Inverting differential bus input (RS-485/RS-422) |
| Pin 6 | VCC — Supply voltage input (3.0V to 5.5V) |
Tipikal na mga Gamit
ISL3283EFHZ-T ay nararapat para sa 6 aplikasyons: Industrial Fieldbus Networks (Modbus, Profibus), Building Automation (BACnet MS/TP, LonWorks), Security & Surveillance Camera Data Links, Solar Inverter & Energy Storage Communication, Medical Equipment Data Acquisition, LED Lighting & Stage Control DMX-512.
Industrial Fieldbus Networks (Modbus, Profibus)
The ISL3283EFHZ-T fits industrial fieldbus networks because its 1/8 unit-load (125µA/-100µA bus current) lets designers deploy up to 256 nodes on a single twisted pair, far above the 32-node ceiling of legacy 1-unit-load receivers like the ISL32611E. The 20Mbps data rate covers Profibus DP (12Mbps) and high-speed Modbus RTU links used in factory automation. Placed on each slave device's UART RX line, the receiver converts the differential bus signal to CMOS logic; the integrated ±16.5kV IEC61000-4-2 ESD protects against cable-discharge events when long shielded cables are reconnected in the field, reducing the need for external TVS protection.
Inirekomenda
Building Automation (BACnet MS/TP, LonWorks)
The ISL3283EFHZ-T is ideal for BACnet MS/TP and LonWorks building-automation networks because its 1/8 unit load supports dense sensor networks (256 nodes per segment) in HVAC controllers, lighting panels, and access-control systems. The 20Mbps rate exceeds BACnet's 115.2kbps minimum with margin for future speed upgrades. Connected between the RS-485 bus and a Cortex-M MCU UART, the receiver's full fail-safe (open, shorted, idle-bus) thresholds eliminate the external bias resistors otherwise required on the bus, reducing BOM cost. The -40°C to +125°C operating range covers unconditioned rooftop and basement installations.
Inirekomenda
Security & Surveillance Camera Data Links
The ISL3283EFHZ-T enables long-distance PTZ camera data links over RS-485 wiring because its ±16.5kV ESD rating withstands lightning-induced surges on outdoor cable runs. With 20Mbps capability and 256-node support, a single RS-485 trunk can carry telemetry from a fleet of cameras. The receiver sits between the bus and a microcontroller UART; its SOT-23-6 footprint simplifies integration into compact dome-camera enclosures. Compared to non-ESD-protected receivers that require external TVS arrays, the integrated IEC61000-4-2 protection reduces PCB area and BOM cost in space-constrained IP-camera designs.
Inirekomenda
Solar Inverter & Energy Storage Communication
The ISL3283EFHZ-T is well-suited for solar inverter daisy-chain communication because its 1/8 unit load enables large string-monitoring networks (up to 256 panels per RS-485 segment) while its -40°C to +125°C rating covers rooftop thermal cycling. The 20Mbps data rate handles aggregated inverter telemetry, fault logs, and firmware updates. Installed on each inverter's RS-485 RX line, the receiver's ±16.5kV ESD protects against ground-potential differences and induced surges from PV array switching. The full fail-safe feature avoids false fault triggers when inverters are powered down sequentially during commissioning.
Inirekomenda
Medical Equipment Data Acquisition
The ISL3283EFHZ-T supports medical device data-acquisition buses because its ±16.5kV ESD protects patient-monitoring networks from electrostatic discharge events during routine cleaning and equipment reconfiguration. The 1/8 unit-load feature allows dense bed-side-monitor topologies (up to 256 nodes), while the 20Mbps rate accommodates multi-channel vital-sign telemetry. Connected between the RS-485 backbone and a DSP or ARM MCU, the receiver's full fail-safe prevents false alarms when sensors are unplugged. Note: medical safety certifications (IEC 60601-1) must be validated at the system level by the OEM.
Inirekomenda
LED Lighting & Stage Control DMX-512
The ISL3283EFHZ-T suits DMX-512 stage-lighting and architectural-LED control networks because its 1/8 unit load supports 256-node installations and its 20Mbps data rate exceeds DMX-512's 250kbps requirement with overhead for newer DMX-512-A extensions. The ±16.5kV ESD withstands transient discharge events common in concert venues with long cable runs. Mounted at each fixture's data-input stage, the receiver decodes differential DMX packets to a Cortex-M LED controller. Compared to legacy MAX485 receivers, the ISL3283E's 1/8 UL eliminates the 120Ω termination-loading compromises in mixed-protocol lighting rigs.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ISL3283EFHZ-T — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ISL3283EFHZ-T7A | ISL3283EIHZ-T | ISL3282EFHZ-T | MAX3283EESA+ |
|---|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 (same) | SOT-23-6 (same) | SOT-23-6 (same) | SOT-23-6 (same) |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices |
| Data Rate | 20 Mbps | 20 Mbps | 20 Mbps | 20 Mbps | 20 Mbps |
| Unit Load | 1/8 UL | 1/8 UL | 1/8 UL | 1/8 UL | 1/8 UL |
| ESD Protection | ±16.5 kV IEC61000-4-2 | ±16.5 kV | ±16.5 kV | ±16.5 kV | ±15 kV (≈ -10%) |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Enable Pin Polarity | Active-low | Active-low | Active-low | Active-low | Active-low |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C (industrial) |
| Max Nodes on Bus | 256 | 256 | 256 | 256 | 256 |
| Approx. Unit Price (qty 100) | $1.74 | $1.74 (est. same die) | $1.85 (est. industrial) | $1.80 (est. same family) | $2.10 (est.) |
Pangunahing mga Pagkakaiba
- Industry-leading ±16.5kV IEC61000-4-2 ESD protection (kumpara saMAX3283EESA+)
- Extended industrial -40°C to +125°C temperature range (kumpara saMAX3283EESA+)
- Active-low enable pin logic (kumpara saISL3281EFHZ-T)
- Pin-compatible family with 6/8/14-pin variants (kumpara saMAX3283 (single function only))
Talaan ng Disenyo
Place a 100nF (0.1µF) X7R decoupling capacitor as close as possible (within 2mm) to the VCC pin (pin 6) to suppress high-frequency noise on the supply rail. Keep the A and B bus traces short and matched-length to minimize common-mode noise coupling. The exposed SOT-23-6 pad is not present on this package; the die is cooled through the standard lead frame, so no additional copper thermal relief is required.
Do not leave the /RE pin (pin 2) floating — it must be tied either directly to GND for always-enabled operation or driven by a controller GPIO. A floating /RE pin can cause the receiver output to enter an indeterminate state. For always-enabled designs, drive /RE low (logic 0). Also, ensure proper RS-485 bus termination (120Ω between A and B at both ends of the cable run) to prevent signal reflections at 20Mbps.
Estimated: at 20Mbps with the worst-case 1/8 unit-load receiver, the maximum stub length per node should be kept below 0.3m (per TIA/EIA-485-A guidelines) to avoid reflections. For a 256-node network, use a backbone topology rather than a star — connect each node's stub as close to the main trunk as possible. The fail-safe thresholds (typically ±200mV differential) provide noise margin but do not compensate for improperly terminated buses.
Although the ISL3283EFHZ-T is a receiver (not a transmitter) and draws minimal supply current (~1mA typical), if the part is used in a battery-powered sensor node, the /RE pin should be driven high during sleep to disable the receiver output and reduce quiescent draw. The internal bus-current spec (+125µA/-100µA) is independent of the supply current and contributes a small continuous load on the bus when the system is powered off.
Impormasyon ng Pagsunod sa Kautusan
RoHS and REACH compliance per Renesas product page (EU RoHS Compliant, REACH Compliant). The -T/-T7A suffix parts are industrial grade (-40°C to +125°C) but not AEC-Q100 qualified — for automotive applications choose the MAX3283EESA/V+ variant.
