XR33180ESBTR - 52Mbps RS-485/422 Receiver | MaxLinear | 3-5.5V
MPN: XR33180ESBTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
XR33180ESBTR Overview
A receiver is a serial-interface sub-block that converts a differential voltage on the RS-485/RS-422 bus into a single-ended logic-level signal for a UART, MCU, or ASIC. In the broader signal-composition hierarchy, an RS-485 receiver belongs to the line-driver/receiver family, which sits under the interface-IC category within power-management and connectivity ICs. Receiver-only parts like the XR33180 are used when system partitioning places the driver in another IC, when retrofitting an RS-485 receiver onto a board already containing a discrete or FPGA-based driver, or when a design needs bus-monitoring/diagnostics while the main driver is in high-impedance.
Key specifications include a maximum data rate of 52Mbps, a wide 3.0V to 5.5V supply range, a 1/8 unit-load input impedance (allowing up to 256 nodes on a single bus), and an industrial operating temperature range of -40C to +85C. The receiver features a fail-safe open-circuit, short-circuit, and idle-bus design that guarantees a logic-high output when the bus is undriven, eliminating the need for external biasing resistors on many networks.
The XR33180 uses a 5-pin TSOT-23 (Thin Small Outline Transistor) package with a 2.9mm x 1.6mm body, sharing the same land pattern as industry-standard TSOT-23-5 pinouts. This makes the part compatible with a range of pin-compatible RS-485 receiver drop-in alternatives from Maxim, TI, and Renesas. Logic outputs swing rail-to-rail and are TTL-compatible, supporting direct connection to 3.3V and 5V MCUs without level shifters.
Typical applications include industrial field-bus networks (Modbus RTU, Profibus DP, BACnet), building automation (lighting, HVAC, security panels), motor-control and encoder feedback links, point-of-sale (POS) terminals, and any high-speed multi-drop RS-485 link where a small-footprint, robust-ESD receiver is required. The part is commonly paired with the XR33183 half-duplex transceiver or a discrete RS-485 driver in mixed designs.
When designing with the XR33180, place a 100nF decoupling capacitor within 2 mm of the VCC pin and add a bulk 10uF capacitor near the supply rail. Keep the receiver differential inputs (A, B) impedance-controlled on the PCB; route them as a tightly-coupled 100-ohm differential pair to preserve signal integrity at maximum data rate. The fail-safe biasing is internal, so external fail-safe resistors are usually not required.
This page synthesizes MaxLinear distributor pricing, same-brand drop-in alternatives (XR33181ESBTR, XR33183ESBTR, XR33184ESBTR), and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for XR33180ESBTR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
XR33181ESBTR
✅ Drop-In📋 Reference alternative (not in catalog)
XR33183ESBTR
✅ Drop-In📋 Reference alternative (not in catalog)
XR33184ESBTR
✅ Drop-In📋 Reference alternative (not in catalog)
XR33180ESBTR Specifications
| Function | RS-422/RS-485 Receiver |
| Number of Receivers | 1 |
| Protocol | RS-422, RS-485 |
| Maximum Data Rate | 52 Mbps |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Receiver ESD Protection | ±15 kV (IEC 61000-4-2 air-gap on bus pins) |
| Receiver Input Impedance (Unit Load) | 1/8 unit load (up to 256 nodes on bus) |
| Fail-Safe | Open-circuit, short-circuit, idle-bus (logic-high output) |
| Output Type | Single-ended, TTL-compatible, rail-to-rail |
| Operating Temperature | -40 C to +85 C |
| Package | TSOT-23-5 (2.9 mm x 1.6 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <=30C/85% RH) |
| RoHS Status | Compliant |
| Pin Count | 5 |
XR33180ESBTR Pin Configuration
| Pin 1 | RO — Receiver Output (TTL, active-high, rail-to-rail) |
| Pin 2 | GND — Ground reference |
| Pin 3 | A — Non-inverting differential receiver input |
| Pin 4 | B — Inverting differential receiver input |
| Pin 5 | VCC — Supply voltage input, 3.0 V to 5.5 V |
Typical Applications
XR33180ESBTR is suitable for 6 applications: Industrial Fieldbus (Modbus / Profibus / BACnet), Building Automation (HVAC, Lighting, Security), Motor Control and Encoder Feedback, Point-of-Sale (POS) Terminals, Solar Inverter Monitoring, Utility Smart Metering.
Industrial Fieldbus (Modbus / Profibus / BACnet)
The XR33180ESBTR's 52 Mbps data rate and 1/8 unit-load input impedance make it ideal for high-speed industrial fieldbus networks. In a Modbus RTU or Profibus DP segment, the XR33180 sits on each node as the bus receiver, converting the differential A/B signal into a TTL-level UART input on an STM32 or similar MCU. The internal fail-safe bias eliminates the external 680-ohm pull-up/pull-down resistors that legacy designs required, simplifying the BOM. Up to 256 nodes can share a single bus thanks to the 1/8 unit load, which scales well for sensor-dense factory deployments.
Recommended
Building Automation (HVAC, Lighting, Security)
In building-automation backbones the XR33180ESBTR provides a robust RS-485 receiver for lighting controllers, HVAC actuators, and security panel nodes. The ±15 kV IEC 61000-4-2 ESD rating on bus pins allows the receiver to survive installer wiring transients and eliminates the external TVS diode that lower-ESD parts require. The 3.0V to 5.5V supply range supports both 3.3V wireless-MCU-based sensor nodes and 5V legacy panel electronics, simplifying mixed-voltage designs. The TSOT-23-5 package keeps the receiver footprint under 5 mm², fitting inside small ceiling-mounted sensor housings.
Recommended
Motor Control and Encoder Feedback
Servo drives and stepper controllers use the XR33180ESBTR to receive high-speed encoder feedback or RS-485 command frames from a centralized motion controller. The 52 Mbps rate comfortably exceeds the bandwidth required for 32-bit encoder counters streamed at multi-MHz update rates. The wide -40C to +85C industrial temperature range supports installation inside the drive cabinet where ambient temperatures reach 70C. The internal fail-safe keeps the drive from interpreting noise as a valid command when the upstream controller is offline or the cable is disconnected during commissioning.
Recommended
Point-of-Sale (POS) Terminals
POS peripherals such as barcode readers, receipt printers, and customer displays often communicate over RS-485 to a main terminal. The XR33180ESBTR handles the inbound half of that link with its 52 Mbps capability and TTL output directly wired to the host SoC's UART. The TSOT-23-5 package fits on space-constrained peripheral PCBs that must also host a display driver and power-management IC. Robust ±15 kV ESD protects the peripheral from static discharge through the user-facing cable gland, which is a frequent failure mode in retail environments.
Recommended
Solar Inverter Monitoring
Solar string inverters and DC optimizers use RS-485 links to report telemetry back to a data-acquisition gateway. The XR33180ESBTR's wide 3.0V to 5.5V supply directly accepts the 5V aux rail inside the inverter, and its -40C to +85C range covers outdoor combiner-box temperatures. The internal fail-safe and 1/8 unit load support long daisy-chained strings with up to 256 optimizers per port. Industrial ESD protection keeps the link robust through PV array switching transients that couple into the RS-485 cable.
Recommended
Utility Smart Metering
Electricity, water, and gas smart meters commonly use RS-485 to daisy-chain into a concentrator. The XR33180ESBTR's 1/8 unit-load input allows up to 256 meters per segment, which aligns with the IEC 62056-21 / DLMS/COSEM multi-drop metering architecture. The low-power TSOT-23-5 footprint and 3.0V to 5.5V supply suit battery-assisted meters where quiescent draw is critical. Internal fail-safe ensures the meter presents a defined logic state when the concentrator is offline for maintenance.
Recommended
Recommended Products Summary
Engineering reference data for XR33180ESBTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | XR33181ESBTR | XR33183ESBTR | XR33184ESBTR | MAX3485ESA |
|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | Analog Devices |
| Package | TSOT-23-5 | TSOT-23-5 | TSOT-23-5 | TSOT-23-5 | SOIC-8 (footprint differs) |
| Function | Receiver (0/1) | Receiver (0/1, inverting) | Transceiver (half-duplex) | Transceiver (full-duplex) | Transceiver (full-duplex) |
| Maximum Data Rate | 52 Mbps | 52 Mbps | 52 Mbps | 52 Mbps | 10 Mbps |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 3.6V |
| Bus ESD Protection (Air Gap) | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| Receiver Input Unit Load | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1 unit load (32 nodes) |
| Internal Fail-Safe Bias | Yes (open/short/idle) | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Only 0/1 receiver in TSOT-23-5 with 1/8 unit load and ±15 kV ESD (vs MAX3485ESA)
- Higher maximum data rate than legacy cross-brand equivalents (vs MAX3485ESA)
- Same-brand family breadth for upgrade/downgrade flexibility (vs MAX3485ESA)
Design Notes
Place a 100nF X7R ceramic decoupling capacitor within 2 mm of the VCC pin (pin 5) and a bulk 10uF capacitor near the supply rail. Route the differential inputs as a tightly-coupled 100-ohm differential pair with ground on each side, and keep the pair length matched to within 1 mm to avoid common-mode conversion at 52 Mbps. Avoid routing A/B near switching nodes or clock traces to preserve receiver jitter margin.
Do not omit the bus termination: install a 120-ohm resistor across the A/B pair at each end of the bus cable to match the characteristic impedance. The XR33180ESBTR's internal fail-safe handles open/short/idle bus, but does not replace proper termination. For multi-drop buses with stubs longer than ~10 cm, consider lower stub lengths or repeaters to avoid reflections.
Estimated: at 52 Mbps with a typical 10-meter CAT5 cable (≈100 ohm differential, ≈5 ns/m propagation), the round-trip propagation delay is roughly 100 ns. Keep cable stubs shorter than 1/10 of the rise time (~0.3 m for 52 Mbps NRZ) to avoid reflection-induced jitter. If the design must exceed 10 m, lower the data rate or insert a repeater such as another XR33183 to maintain signal integrity.
The XR33180ESBTR TSOT-23-5 package dissipates approximately 25 mW at full 52 Mbps with a 5V supply, well within the package's 1 W rating at the recommended PCB footprint. In enclosed outdoor enclosures above +60C ambient, verify thermal performance with a margin of 20% and add thermal vias to a ground copper pour if derating margin is required.
Compliance Information
RoHS compliant and lead-free per MaxLinear product page and distributor datasheets (DigiKey sku 6193847, Mouser). MSL-1 per JEDEC J-STD-020. Bus ESD tested per IEC 61000-4-2. Not AEC-Q100 qualified - this part is targeted at industrial/commercial applications, not automotive.
