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Texas Instruments DS75176BTM
- Part No.:
- DS75176BTM
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS75176BTM.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
DS75176BTM from Texas Instruments is a high-speed, half-duplex RS-485/RS-422 transceiver in an 8-pin SOIC package, featuring ±7V to +12V bus common-mode range, 22 ns driver propagation delay, and thermal shutdown protection. It operates from a single +5V supply and supports up to 32 nodes on a multipoint bus in industrial automation and building control systems.
For engineers reviewing the DS75176BTM datasheet, DS75176BTM pinout, DS75176BTM application, or DS75176BTM equivalent, this device is selected for robust differential communication in noisy environments with ground potential differences, requiring fail-safe receiver thresholds, TRI-STATE bus drivers, and guaranteed operation from −40°C to +85°C.
Technical Context
The DS75176BTM integrates a differential driver and receiver in a single IC with independent enable controls (DE and RE), supporting half-duplex RS-485 bus topology. Its receiver features 70 mV hysteresis and failsafe logic that outputs a logic high when inputs are open or shorted.
Driver output impedance and receiver input resistance combine to less than one RS-485 unit load (≥12 kΩ), enabling up to 32 transceivers on a single bus segment. Thermal shutdown activates under bus contention or short-circuit conditions, forcing driver outputs into high-impedance state without external intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures stable operation across standard 5V rail tolerances in industrial power supplies. |
| Bus Common-Mode Range | −7 V to +12 V - Accommodates up to ±7V ground potential difference between nodes without receiver malfunction. |
| Driver Propagation Delay | 22 ns typical - Enables reliable data transmission at up to 25 Mbps over short traces (<10 m) in point-to-point or multidrop configurations. |
| Receiver Input Hysteresis | 70 mV typical - Prevents output oscillation near threshold during slow-rising or noisy differential signals. |
| Thermal Shutdown Threshold | Internally set - Automatically disables driver outputs during sustained bus faults, eliminating need for external current limiting or reset circuitry. |
| Unit Load Count | <1 - Allows connection of up to 32 DS75176BTM devices on one RS-485 bus segment without signal integrity degradation. |
| Operating Temperature | −40°C to +85°C - Qualified for extended temperature industrial applications including HVAC controllers and PLC I/O modules. |
Pinout & Package
DS75176BTM uses an 8-pin SOIC package (Package Drawing D), with gull-wing leads and RoHS-compliant CU SN finish. Pin spacing is 1.27 mm, body width 3.9 mm, and total package dimensions 4.9 × 6.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RO | Receiver Output | CMOS-compatible logic-level output reflecting differential bus state; high-impedance when RE = 1. |
| RE | Receiver Enable (active low) | Controls receiver output state; logic low enables RO, logic high places RO in high-impedance mode. |
| DI | Driver Input | TTL/CMOS-compatible input controlling driver polarity; transitions propagate to DO/DO within 22 ns. |
| DE | Driver Enable (active high) | Enables driver outputs when high; forces DO/DO into high-impedance state when low. |
| DO | Driver Output (non-inverting) | Differential bus terminal A; swings between ≈0 V and ≈5 V relative to DO under 27 Ω load (RS-485). |
| DO | Driver Output (inverting) | Differential bus terminal B; complementary to DO, forming 1.5 V min differential swing per EIA-485. |
| VCC | Positive Supply | +5 V power input; decoupling capacitor (0.1 µF) required within 1 cm of pin for noise immunity. |
| GND | Ground Reference | Signal and power return; must be connected to local system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| RS-485/RS-422 Dual Compatibility | Meets EIA/TIA-485-A and EIA/TIA-422-B electrical specifications, allowing reuse across legacy RS-422 point-to-point and modern RS-485 multidrop networks. |
| Fail-Safe Receiver | Outputs logic high when bus is open, shorted, or idle - eliminates need for external biasing resistors in many installations. |
| TRI-STATE Driver Outputs | Both DO and DO enter high-impedance state when DE = 0, enabling clean bus arbitration and multi-master protocol support. |
| Thermal Shutdown Protection | Self-resetting internal circuit disables driver outputs during sustained overcurrent events (e.g., bus short), preventing latch-up or permanent damage. |
| High-Impedance Bus State | Receiver remains high-Z when powered down or RE = 1, and driver enters high-Z when DE = 0 or VCC = 0 - ensures no bus loading during sleep or fault. |
Applications
| Industrial PLC Networks | Building Automation Systems |
|---|---|
|
Use Scenario: Connecting remote I/O modules to a central PLC over twisted-pair cabling in factory environments with motor drives and variable-frequency inverters. IC Role / Device Role / Timing Role: Half-duplex RS-485 transceiver providing noise-immune differential signaling between controller and distributed sensors/actuators. Use Value: −7 V to +12 V common-mode range rejects ground loop noise; thermal shutdown prevents failure during cable shorts caused by mechanical damage. |
Use Scenario: Interfacing HVAC controllers, lighting panels, and access control units via a shared BACnet MS/TP bus in commercial buildings. IC Role / Device Role / Timing Role: RS-485 line driver/receiver implementing physical layer for master-slave token-passing protocol at 76.8 kbps. Use Value: 70 mV receiver hysteresis suppresses false triggering from EMI-induced bus ringing; <1 unit load allows 32 endpoints on single trunk. |
| Energy Metering Gateways | Remote SCADA Telemetry |
|
Use Scenario: Aggregating pulse and Modbus RTU data from residential electricity meters installed across meter cabinets with varying earth potentials. IC Role / Device Role / Timing Role: Isolated RS-485 interface component (used with digital isolator) enabling galvanically separated communication links. Use Value: Guaranteed operation from −40°C to +85°C supports outdoor cabinet deployment; fail-safe receiver ensures valid logic high during meter removal or cable disconnect. |
Use Scenario: Transmitting sensor readings from oil/gas wellhead monitors over long-distance (1200 m) RS-485 links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Robust physical-layer transceiver interfacing microcontroller UART to ruggedized field wiring. Use Value: High-impedance bus state during power loss avoids loading live bus; ±10 V absolute max receiver input rating withstands transient coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX485CSA+ | Wider operating temperature (−40°C to +125°C); lower ICC (300 µA vs. 35 mA disabled); no thermal shutdown. | Preferred for high-temp automotive or extended-range industrial use where fault protection is handled externally. | Select MAX485CSA+ when thermal shutdown is unnecessary and ultra-low quiescent current is critical for battery-powered nodes. |
| SN65HVD72DR | Integrated IEC 61000-4-2 ESD protection (±15 kV contact); higher ESD rating than DS75176BTM (500 V HBM only); same SOIC-8 package. | Suitable for direct-board-mount applications in unshielded enclosures or field-deployed equipment lacking external TVS diodes. | Choose SN65HVD72DR when system-level ESD robustness must be achieved without discrete protection components. |
Compared with MAX485CSA+ and SN65HVD72DR, the DS75176BTM provides proven thermal fault handling and fail-safe receiver behavior at lower cost, making it optimal for fixed-installation industrial networks where board space and temperature range align with its −40°C to +85°C specification.
Availability
DS75176BTM is available at Aetrix Electronics and suitable for industrial PLC networks, building automation systems, energy metering gateways, and remote SCADA telemetry requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DS75176BTM 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The DS75176BTM belongs to TI's legacy RS-485 transceiver portfolio, designed specifically for reliable, cost-effective multidrop communication in harsh industrial environments with wide ground potential variation.
FAQ
What is the maximum data rate supported by the DS75176BTM?
The DS75176BTM supports data rates up to 25 Mbps under ideal conditions (short trace lengths, proper termination, low capacitance). At longer distances (e.g., 1200 m), the practical limit drops to 100 kbps due to signal attenuation and skew. The 22 ns driver propagation delay and 37 ns receiver delay confirm suitability for high-speed timing-critical links when layout and cabling comply with RS-485 standards. DS75176BTM performance matches EIA-485 Class 1 requirements for fast edge rates.
Does the DS75176BTM include built-in ESD protection?
The DS75176BTM has limited on-chip ESD protection rated at 500 V HBM (Human Body Model), as specified in its Absolute Maximum Ratings table. It does not meet IEC 61000-4-2 level 4 (±8 kV contact) without external TVS diodes. TI recommends using external transient voltage suppressors on bus lines for field-deployed applications. DS75176BTM's design assumes board-level protection is implemented per system-level EMC requirements.
How does the fail-safe feature of the DS75176BTM work?
The DS75176BTM's fail-safe receiver outputs a logic high when the differential input voltage (VID) is between −0.2 V and +0.2 V - covering open-circuit, shorted, or unterminated bus states. This behavior is enabled by internal biasing and 70 mV hysteresis, ensuring RO remains high during idle or fault conditions without external resistors. DS75176BTM implements this per Table 2 in its datasheet, guaranteeing defined output states even with floating inputs.
Can the DS75176BTM operate with a 3.3V supply?
No, the DS75176BTM requires a nominal +5V supply with a minimum of 4.75 V and maximum of 5.25 V, as defined in its Recommended Operating Conditions. Its driver output voltage (5 V unloaded, 1.5 V into 27 Ω) and logic thresholds (VIH = 2.0 V, VIL = 0.8 V) are optimized for 5V TTL/CMOS interfaces. Using 3.3V violates absolute maximum ratings and will result in undefined operation or damage. DS75176BTM is not compatible with 3.3V-only systems without level-shifting.
Is the DS75176BTM pin-compatible with older National Semiconductor parts?
Yes, the DS75176BTM is pin-compatible with SN75176A/B and DS3695/A, as explicitly stated in its datasheet Features section. All share identical 8-pin SOIC (D) or PDIP (P) footprints, matching pin functions: RO, RE, DI, DE, DO, DO, VCC, GND. This allows drop-in replacement in legacy designs originally using those parts, provided temperature and timing requirements align - DS75176BTM extends operation to −40°C to +85°C versus 0°C to +70°C for DS75176B.
DS75176BTM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Transceiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 70 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS75176BTM FAQ
1.How can I place an order for DS75176BTM through Aetrix?
Please submit a Request for Quotation (RFQ) for DS75176BTM 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 DS75176BTM reliable?
The price and inventory of DS75176BTM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS75176BTM is usually 5 days.
3.What payment methods are accepted for DS75176BTM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS75176BTM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS75176BTM?
DS75176BTM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS75176BTM 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 DS75176BTM?
For technical support, including DS75176BTM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS75176BTM requirements.
6.How does Aetrix verify that DS75176BTM is sourced from the original manufacturer or authorized distributors?
All DS75176BTM 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 DS75176BTM meets industry standards.
7.What is the process for return or replacement of DS75176BTM?
All DS75176BTM units undergo pre-shipment inspection (PSI). If there is an issue with DS75176BTM, 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 DS75176BTM part is unused and in its original packaging.
Return procedure for DS75176BTM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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