SN65LBC176DR - 10Mbps RS-485 Transceiver 5V | Texas Instruments
MPN: SN65LBC176DR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.01 | $3.01 |
| 10 | $2.71 | $27.10 |
| 100 | $2.2 | $220.00 |
| 500 | $1.75 | $875.00 |
| 1,000 | $1.27 | $1,270.00 |
Drop-in alternatives for SN65LBC176DR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN65LBC176ADR
β Drop-Inπ Reference alternative (not in catalog)
SN75LBC176DR
β Drop-Inπ Reference alternative (not in catalog)
SN65LBC176D
β Drop-Inπ Reference alternative (not in catalog)
SN65HVD3085EDR
β Drop-Inβ In Stock
$0.32 / Unit
View Datasheet βST485BDR
β‘ Same Packageπ Reference alternative (not in catalog)
MAX485CSA
β‘ Same Packageπ Reference alternative (not in catalog)
SN65LBC176DR Maximum Ratings & Electrical Characteristics
| Protocol | RS-422, RS-485 |
| Number of Transceivers | 1/1 |
| Duplex | Half |
| Signaling Rate | 10 Mbps |
| Supply Voltage (Nominal) | 5 V |
| Fault Protection | -10 V to 15 V |
| Operating Temperature | -40C to +85C |
| Package | 8-SOIC (D), 3.90 mm width |
| Mounting Type | Surface Mount |
| Driver/Receiver Enable | DE active-high, RE active-low |
| Technology | LinBiCMOS |
| Standard Compliance | ANSI RS-485, ISO 8482:1987 (E) |
| Bus Type | Multipoint bus-transmission line |
| Receiver Inputs | Differential |
| Output Type | 3-state differential driver |
| RoHS Status | [DATA_NEEDED: RoHS status] |
SN65LBC176DR Pin Configuration
| Pin 1 | RO β Receiver output |
| Pin 2 | RE β Receiver enable (active low) |
| Pin 3 | DE β Driver enable (active high) |
| Pin 4 | D β Driver input |
| Pin 5 | GND β Ground |
| Pin 6 | A β Driver output / receiver input (non-inverting) |
| Pin 7 | B β Driver output / receiver input (inverting) |
| Pin 8 | VCC β 5V power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN65LBC176DR is suitable for 6 applications: Industrial Automation Networks, Motor Drive Communication Links, Building Automation and HVAC, Energy Metering and Smart Grid, Security and Surveillance Systems, Point-of-Sale and Peripheral Interconnect.
Industrial Automation Networks
The SN65LBC176DR fits industrial fieldbus nodes because its 10 Mbps rate supports fast deterministic control cycles and its -10V to 15V bus fault tolerance survives harsh electrical environments on factory floors. Placed between an MCU UART and the twisted-pair RS-485 trunk, it drives a multidrop network of up to 32 unit loads; 120 ohm end-of-line termination plus fail-safe biasing ensures a defined receiver state during idle periods, preventing spurious frames in PLC and sensor-bus installations.
Recommended
Motor Drive Communication Links
In variable-frequency drives, the SN65LBC176DR links the controller to gate-driver and sensing boards over RS-485. The industrial -40C to +85C rating and LinBiCMOS low-skew design keep 10 Mbps control frames intact despite switching noise from the power stage. Isolated variants of the layout combine the transceiver with digital isolators so the bus ground floats relative to the motor drive DC link, improving common-mode transient immunity in high dv/dt environments.
Recommended
Building Automation and HVAC
Building controllers use half-duplex RS-485 because wiring cost dominates; the SN65LBC176DR's single direction-control configuration (DE and RE tied together) minimizes MCU pin usage in thermostats, dampers, and HVAC gateway nodes. Its 5V supply matches legacy control boards, and 10 Mbps headroom supports future network upgrades. The wide receiver common-mode range tolerates ground-potential differences between floors of a building, a common source of RS-485 communication faults.
Recommended
Energy Metering and Smart Grid
Electricity meters and data-concentrators communicate over RS-485 daisy chains running hundreds of meters; the SN65LBC176DR's differential signaling rejects noise induced on long cable runs while its 10 Mbps capability supports rapid meter polling in dense deployments. The -10V to 15V fault protection guards against wiring mistakes during installation. Combined with a precision energy-metering AFE, the transceiver forms the communication front end of polyphase meters and sub-metering gateways.
Recommended
Security and Surveillance Systems
PTZ camera control and access-control panels commonly use RS-485 multidrop buses; the SN65LBC176DR provides the half-duplex transceiver function in each node, with low skew supporting fast pan-tilt-zoom command updates at multi-megabit rates. Its 8-SOIC footprint suits compact camera head boards, and the industrial temperature range covers outdoor enclosures. Bus fail-safe biasing prevents random receiver toggling when no controller is transmitting on the shared line.
Recommended
Point-of-Sale and Peripheral Interconnect
Retail peripherals such as receipt printers, scanners, and cash-drawer controllers frequently expose RS-485 serial ports. The SN65LBC176DR's 5V, 10 Mbps transceiver suits these cost-sensitive, cable-based links where EMI from receipt printers would corrupt single-ended signaling. The small 8-SOIC (D) package fits dense main-board layouts, and hot-unplug events on the cable are tolerated thanks to the -10V to 15V bus fault-tolerance window specified in the datasheet.
Recommended
Recommended Products Summary
Engineering reference data for SN65LBC176DR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN65LBC176ADR | SN75LBC176DR | ST485BDR |
|---|---|---|---|---|
| Package | 8-SOIC (D) | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Signaling Rate | 10 Mbps | 30 Mbps | 10 Mbps | up to 2.5 Mbps class |
| Operating Temperature | -40C to +85C | -40C to +85C | 0C to +70C | -40C to +85C |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Fault Protection | -10 V to 15 V | -10 V to 15 V | -10 V to 15 V | short-circuit current limited |
| Duplex | Half | Half | Half | Half |
| Unit Price (1 pc, as of 2026-08-29) | ~$3.01 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 10 Mbps high-speed signaling (vs MAX485CSA)
- Higher speed than the standard part in same footprint (vs SN65LBC176DR)
- Industrial temperature range (vs SN75LBC176DR)
Design Notes
Terminate the RS-485 bus at both physical ends with 120 ohm resistors matching the twisted-pair characteristic impedance; at 10 Mbps, even short unterminated stubs cause reflections that corrupt frames. Place the SN65LBC176DR within a few centimeters of the connector with a direct, short A/B trace pair, and add a 0.1 uF ceramic decoupling capacitor within 2 mm of the VCC pin plus a 4.7-10 uF bulk capacitor.
Tie DE (pin 3, active-high) and RE (pin 2, active-low) together for single-wire direction control, but ensure the MCU drives this node to a defined state during reset - use a 10 kOhm pull-down so the receiver stays enabled and the driver is disabled at power-up. Failing to bias direction control causes bus contention when multiple nodes power up simultaneously.
Add fail-safe biasing (approximately 560 Ohm pull-up on B, 560 Ohm pull-down on A at one bus point) so the receiver output is deterministic when all drivers are 3-stated; the SN65LBC176 receiver does not include internal full fail-safe, so an idle bus can otherwise produce noise-triggered receiver transitions at 10 Mbps.
Compliance Information
Compliance data not present in verified web data; confirm RoHS/REACH certificate on TI.com product page for the specific date code.
