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STMicroelectronics ST1480ABDR
- Part No.:
- ST1480ABDR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST1480ABDR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:45,748
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Product details
Overview
ST1480ABDR from STMicroelectronics is a 3.3 V powered, half-duplex RS-485/RS-422 transceiver with ±15 kV HBM ESD protection, guaranteed 12 Mbps data rate, and -40 °C to +85 °C operating temperature range. It integrates one driver and one receiver in SO-8 package and features true fail-safe receiver operation for floating or shorted bus lines-used in industrial automation networks requiring robust differential communication.
For engineers reviewing the ST1480ABDR datasheet, ST1480ABDR pinout, ST1480ABDR application, or ST1480ABDR equivalent, key selection criteria include its 3.3 V single-supply operation without charge pump, industry-standard 75176 pinout compatibility, shutdown current ≤1 µA, and common-mode input range of -7 V to +12 V.
Technical Context
The ST1480ABDR implements a half-duplex transceiver architecture with independent driver output enable (DE) and receiver output enable (RE) controls, supporting bidirectional communication on a two-wire bus. Its driver provides differential output voltage ≥1.5 V into 54 Ω (RS-485) and ≥2 V into 100 Ω (RS-422), with propagation delay skew ≤5 ns and transition time ≤20 ns.
The receiver incorporates true fail-safe functionality: RO outputs logic high when A and B are open, shorted, or terminated with no signal-ensured by internal biasing and ≥30 µV hysteresis. Input resistance is 24 kΩ, and common-mode rejection supports operation across -7 V to +12 V, enabling interoperability in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | Guaranteed 12 Mbps minimum-supports high-speed factory floor networks and real-time control loops. |
| Supply voltage | 3.0–3.6 V-enables direct interface with modern 3.3 V microcontrollers without level-shifting. |
| ESD protection | ±15 kV HBM, ±8 kV IEC 1000-4-2 contact-eliminates need for external TVS diodes in panel-mounted equipment. |
| Shutdown current | ≤1 µA max-reduces standby power in battery-backed or energy-sensitive remote I/O modules. |
| Common-mode range | -7 V to +12 V-tolerates ground potential differences across long cable runs in motor drive cabinets. |
| Fail-safe receiver | RO = high for open/shorted/terminated inputs-prevents undefined logic states during bus initialization or fault conditions. |
| Driver output voltage | ≥1.5 V diff into 54 Ω-meets RS-485 standard under worst-case loading and temperature extremes. |
Pinout & Package
ST1480ABDR is housed in an SO-8 (Small Outline, 8-pin) surface-mount package per ECOPACK environmental compliance, with 1.27 mm pitch and standard JEDEC MS-012AC dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RO | Receiver output | CMOS-compatible logic-level output; high when A > B by ≥200 mV, low when A < B by ≥200 mV. |
| 2 RE | Receiver enable | Active-low control; sets RO to high-impedance when high; enables shutdown when high + DE low. |
| 3 DE | Driver enable | Active-high control; enables A/B outputs when high; disables to high-Z when low; enables shutdown with RE high. |
| 4 DI | Driver input | Logic input controlling driver polarity: DI high → A high / B low; DI low → A low / B high. |
| 5 GND | Ground reference | Common return path for supply, logic, and signal currents; must be low-inductance connection in noise-prone layouts. |
| 6 A | Non-inverting I/O | Transmits/receives non-inverting differential signal; connects to bus A line; ±14 V absolute max rating. |
| 7 B | Inverting I/O | Transmits/receives inverting differential signal; connects to bus B line; ±14 V absolute max rating. |
| 8 VCC | Power supply | 3.0–3.6 V input; powers both driver and receiver; bypass capacitor required near pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No charge pump required | Enables clean 3.3 V operation without external capacitors or voltage doubling circuitry-reducing BOM count and board area. |
| Thermal shutdown protection | Automatically disables driver outputs during overload or short-circuit, preventing latch-up and ensuring system-level fault containment. |
| Current limiting | Driver limits short-circuit output current to ±250 mA-protects internal circuitry while allowing safe recovery after fault removal. |
| Interoperable with 5 V logic | Accepts 5 V-tolerant control inputs (DE, RE, DI) while operating from 3.3 V supply-simplifies mixed-voltage system integration. |
| 64-node bus capacity | Input resistance of 24 kΩ allows up to 64 transceivers on a single RS-485 bus-scalable for large distributed I/O systems. |
Applications
| Industrial PLC Backplane | Smart Energy Metering |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and modular I/O cards over 20 cm backplane traces. IC Role / Device Role / Timing Role: Half-duplex RS-485 transceiver handling command/response protocol at 115.2 kbps with deterministic timing. Use Value: Fail-safe receiver prevents spurious interrupts during card hot-swap; 12 Mbps headroom ensures future firmware upgrade paths. | Use Scenario: Communication between metrology IC and host MCU across 10 cm PCB traces in DIN-rail mounted meter housing. IC Role / Device Role / Timing Role: Isolated RS-485 interface (with external isolator) transmitting tariff and consumption data every 15 minutes. Use Value: ±15 kV ESD protection withstands repeated operator contact; 1 µA shutdown current extends supercapacitor backup runtime. |
| Factory Floor Sensor Hub | Building Automation Controller |
Use Scenario: Aggregating temperature, pressure, and flow signals from 12 field sensors via daisy-chained RS-485 bus (up to 1200 m). IC Role / Device Role / Timing Role: Bus node transceiver managing multi-drop polling with 12 Mbps capability for burst diagnostics. Use Value: -7 V to +12 V common-mode range rejects ground noise from nearby VFDs; thermal shutdown prevents damage during cable miswiring. | Use Scenario: Interfacing HVAC controllers, lighting panels, and occupancy sensors over shared RS-485 backbone in commercial buildings. IC Role / Device Role / Timing Role: Half-duplex transceiver implementing BACnet MS/TP physical layer at 76.8 kbps. Use Value: Industry-standard 75176 pinout enables drop-in replacement of legacy transceivers; SO-8 footprint simplifies layout reuse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX13487EESA+ | Same 3.3 V supply, ±15 kV ESD, but includes auto-direction control (no separate DE pin); 16 Mbps rated. | Eliminates external direction-control logic but requires different firmware handshake timing. | Select when reducing GPIO count is critical and bus topology supports automatic direction sensing. |
| SN65HVD72DR | 3.3 V supply, ±16 kV ESD, 16 Mbps, but only 1/8 unit load (up to 256 nodes); no true fail-safe-requires external bias. | Higher node density possible, but failsafe behavior must be implemented externally with resistors. | Select for ultra-high-density networks where external biasing is acceptable and cost-per-node optimization is prioritized. |
Compared with MAX13487EESA+ and SN65HVD72DR, ST1480ABDR offers deterministic manual direction control, guaranteed true fail-safe without external components, and proven interoperability with legacy 75176-based infrastructure-making it optimal for reliability-critical industrial upgrades.
Availability
ST1480ABDR is available at Aetrix Electronics and suitable for industrial PLC backplanes, smart energy metering, factory floor sensor hubs, and building automation controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ST1480ABDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The ST1480ABDR belongs to ST's RS-485/RS-422 transceiver product line, engineered specifically for robust, low-power, high-noise-immunity communication in industrial automation and infrastructure monitoring systems.
FAQ
What is the maximum bus node count supported by ST1480ABDR?
The ST1480ABDR presents a 1/4-unit-load input resistance of 24 kΩ, enabling up to 64 transceivers on a single RS-485 bus segment without signal integrity degradation. This is verified per TIA/EIA-485-A standard compliance and confirmed in the device's electrical characteristics table (RRIN = 24 kΩ). No external termination or biasing is required to achieve this node count.
Does ST1480ABDR require external components for fail-safe operation?
No. The ST1480ABDR implements true internal fail-safe biasing: the receiver output RO is guaranteed high when inputs A and B are open-circuited, shorted together, or terminated with no active signal. This behavior is inherent to the IC's design and does not rely on external resistors or pull-ups, as confirmed in the datasheet's description and truth tables.
Can ST1480ABDR interface directly with 5 V logic controllers?
Yes. Control inputs (DE, RE, DI) are 5 V tolerant-accepting VIH ≥2 V and VIL ≤0.8 V-while operating from a 3.3 V supply. This allows direct connection to 5 V microcontrollers or FPGAs without level shifters, as specified in Table 6 of the datasheet under "Logic input electrical characteristics."
What thermal protection mechanisms are built into ST1480ABDR?
The driver includes both current limiting (±250 mA short-circuit output current limit) and thermal shutdown: if junction temperature exceeds safe threshold due to sustained overload or ambient rise, the driver outputs are forced into high-impedance state until cooling occurs. This dual protection is documented in the Features section and Electrical Characteristics (IOSD parameter).
ST1480ABDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 30 µV
- Data Rate:
- 15Mbps
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ST1480ABDR FAQ
1.How can I place an order for ST1480ABDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST1480ABDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ST1480ABDR reliable?
The price and inventory of ST1480ABDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST1480ABDR is usually 5 days.
3.What payment methods are accepted for ST1480ABDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST1480ABDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST1480ABDR?
ST1480ABDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST1480ABDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ST1480ABDR?
For technical support, including ST1480ABDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST1480ABDR requirements.
6.How does Aetrix verify that ST1480ABDR is sourced from the original manufacturer or authorized distributors?
All ST1480ABDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST1480ABDR meets industry standards.
7.What is the process for return or replacement of ST1480ABDR?
All ST1480ABDR units undergo pre-shipment inspection (PSI). If there is an issue with ST1480ABDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ST1480ABDR part is unused and in its original packaging.
Return procedure for ST1480ABDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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