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Texas Instruments DS3695TN
- Part No.:
- DS3695TN
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DS3695TN.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,232
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Product details
Overview
DS3695TN from Texas Instruments is a high-speed multipoint RS485/RS422 transceiver with TRI-STATE bus interface, 15 ns typical driver propagation delay, −7V to +12V bus common-mode range, and thermal shutdown protection. It operates from a single +5V supply and supports up to 32 unit loads on the bus, enabling robust industrial serial communication in noisy factory-floor environments.
For engineers reviewing the DS3695TN datasheet, DS3695TN pinout, DS3695TN application, or DS3695TN equivalent, this device is selected for high-reliability RS485 repeater and multi-drop bus node designs requiring wide common-mode tolerance, fast switching, and fail-safe receiver hysteresis.
Technical Context
The DS3695TN implements a full-duplex RS485/RS422 transceiver architecture with independent driver and receiver sections, both featuring TRI-STATE control. Its driver delivers 5 V differential output voltage (unloaded) and maintains valid logic levels across the full −7V to +12V common-mode range.
The receiver incorporates 70 mV typical hysteresis and a ±0.2 V differential input threshold, ensuring noise immunity in electrically harsh settings. Thermal shutdown forces driver outputs into high-impedance state over the entire common-mode range, and the device remains functional across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures stable operation under standard 5 V rail tolerances without external regulation. |
| Bus Common-Mode Range | −7 V to +12 V - Supports inter-device ground differentials up to ±7 V, critical for long-cable industrial networks. |
| Driver Propagation Delay | 15 ns (typical) - Enables reliable data transmission at >20 Mbps over short traces with tight timing margins. |
| Receiver Hysteresis | 70 mV (typical) - Reduces false triggering from EMI-induced signal ringing on RS485 differential lines. |
| Unit Load Count | ≤1 - Allows up to 32 transceivers on a single RS485 bus segment without signal integrity degradation. |
| Thermal Shutdown | Active protection - Forces driver into high-Z during overtemperature events, preventing latch-up or bus contention failure. |
| Operating Temperature | −40°C to +85°C - Qualified for extended industrial temperature applications including motor drives and PLC backplanes. |
Pinout & Package
DS3695TN is housed in an 8-pin plastic dual in-line package (PDIP), package drawing P (R-PDIP-T8), RoHS-compliant with matte tin lead finish and moisture sensitivity level (MSL) Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DI) | Driver Input | Accepts TTL/CMOS-level transmit data; VIH = 2 V, VIL = 0.8 V ensures compatibility with standard logic families. |
| 2 (DE) | Driver Enable | Active-high control: enables driver output when high; driver enters high-Z when low or floating (with pull-down). |
| 3 (RO) | Receiver Output | TTL-compatible output; VOH ≥ 2.4 V at −400 μA, VOL ≤ 0.5 V at 16 mA - directly interfaces microcontroller UART inputs. |
| 4 (GND) | Ground Reference | Signal return for internal circuitry; must be connected to local system ground to maintain common-mode integrity. |
| 5 (RE) | Receiver Enable | Active-low control: disables receiver output (high-Z) when high; enables reception when low. |
| 6 (RI) | Receiver Inverting Input | Differential bus input; paired with RI to sense bus polarity; RIN = 12 kΩ minimizes loading on long stubs. |
| 7 (RI) | Receiver Non-Inverting Input | Differential bus input; complements RI; supports true RS485 differential signaling with hysteresis. |
| 8 (VCC) | Positive Supply | +5 V power input; ICC = 42–60 mA (driver enabled) defines decoupling requirements (≥100 nF ceramic + 10 μF bulk). |
Key Features
| Feature | Design Value |
|---|---|
| RS485/RS422 Compliance | Fully meets EIA-485 and EIA-422 electrical specifications, including unit-load definition and common-mode range. |
| TRI-STATE Bus Interface | Driver and receiver outputs enter high-impedance state independently via DE and RE controls - essential for multi-drop arbitration. |
| Wide Common-Mode Tolerance | Operates reliably with −7 V to +12 V on bus lines - accommodates ground shifts in distributed industrial systems. |
| Thermal Fault Reporting | Internal thermal shutdown circuit forces driver into high-Z and asserts open-collector TS pin (10 kΩ pull-up) for system fault detection. |
| Receiver Fail-Safe Biasing | 70 mV hysteresis and ±0.2 V threshold prevent oscillation during idle/bus-fault conditions without external bias resistors. |
Applications
| Industrial PLC Backplane | Factory Automation Hub |
|---|---|
Use Scenario: Serial communication between CPU module and I/O expansion cards in modular programmable logic controllers. IC Role / Device Role / Timing Role: Full-duplex RS485 transceiver providing isolated, noise-immune point-to-multipoint data links across chassis backplanes. Use Value: −7 V to +12 V common-mode range eliminates ground-loop errors across card slots; 15 ns propagation delay supports 20+ Mbps backplane throughput. |
Use Scenario: Central hub connecting multiple sensor nodes (temperature, pressure, flow) over daisy-chained RS485 cabling. IC Role / Device Role / Timing Role: Repeater-capable transceiver managing bus segmentation and signal regeneration in large-scale factory floor networks. Use Value: Thermal shutdown prevents bus lockup during cable shorts; 32-unit-load capability scales to >100 sensor endpoints per segment. |
| Motor Drive Control Network | Building Management System (BMS) |
Use Scenario: Real-time command and feedback exchange between motion controller and servo/inverter drives in CNC machinery. IC Role / Device Role / Timing Role: Robust RS485 physical layer interface handling high dv/dt noise from PWM-driven power stages. Use Value: 70 mV receiver hysteresis rejects EMI from adjacent power circuits; high-impedance TRI-STATE allows dynamic bus reconfiguration. |
Use Scenario: Interconnecting HVAC controllers, lighting panels, and security modules across multi-floor commercial buildings. IC Role / Device Role / Timing Role: Low-power, fail-safe RS485 transceiver enabling reliable long-haul (up to 1200 m) communication in electrically noisy infrastructure. Use Value: Single +5 V supply simplifies power design; −40°C to +85°C rating ensures outdoor enclosure operation without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX485CSA+ | Lower drive strength (1.5 V loaded), no thermal shutdown reporting pin, 0°C to +70°C only. | Suitable for cost-sensitive, non-critical commercial systems with shorter bus lengths and benign thermal environments. | Select MAX485CSA+ only if thermal fault visibility and extended temperature operation are not required. |
| SN65HVD72DR | Higher ESD rating (±16 kV HBM), integrated slew-rate control, 3.3 V supply option, but no TS pin or −40°C support in same package. | Better suited for mixed-voltage systems and electrostatic-prone environments like retail kiosks or medical devices. | Choose SN65HVD72DR when ESD robustness and 3.3 V compatibility outweigh need for thermal reporting and industrial temp range. |
Compared with MAX485CSA+ and SN65HVD72DR, DS3695TN uniquely combines thermal shutdown reporting, −40°C to +85°C operation, and full RS485/RS422 compliance in an industry-standard PDIP-8 package - making it optimal for legacy industrial upgrades where reliability and diagnostics are prioritized over ultra-low power or modern ESD specs.
Availability
DS3695TN is available at Aetrix Electronics and suitable for industrial automation, factory floor networking, and motor control applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DS3695TN 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 specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The DS3695TN belongs to TI's legacy RS485 transceiver family designed specifically for high-noise, long-distance industrial serial communication - emphasizing robustness, wide common-mode tolerance, and fail-safe behavior over low power or high integration.
FAQ
What is the operating temperature range of the DS3695TN?
The DS3695TN is rated for −40°C to +85°C operation, qualifying it for extended industrial environments such as motor drives, outdoor control cabinets, and factory-floor PLCs. This range is confirmed in the "Recommended Operating Conditions" table of the SNLS072C datasheet and distinguishes DS3695TN from the commercial-grade DS3695N (0°C to +70°C). The DS3695TN maintains full electrical performance-including 15 ns driver propagation delay and 70 mV receiver hysteresis-across this full range.
Does the DS3695TN include thermal shutdown protection?
Yes, the DS3695TN integrates thermal shutdown protection that forces the driver outputs into a high-impedance state when junction temperature exceeds safe limits. Unlike basic thermal cutoffs, DS3695TN provides diagnostic visibility via its open-collector TS pin (with internal 10 kΩ pull-up), allowing host systems to detect and log thermal faults. This feature is explicitly documented in the Function Tables and Electrical Characteristics sections of the SNLS072C datasheet and applies across the full −7V to +12V common-mode range.
What package type does the DS3695TN use?
The DS3695TN uses an 8-pin plastic dual in-line package (PDIP) with package drawing P (R-PDIP-T8), as specified in TI's PACKAGE OPTION ADDENDUM dated 23-Aug-2017. It features matte tin (Cu Sn) lead finish, RoHS-compliant green construction, and MSL Level-1 rating. The "TN" suffix denotes the extended temperature grade, while "NOPB" indicates lead-free (Pb-free) processing - consistent with TI's ordering nomenclature and verified in the official orderable device table.
How many unit loads can the DS3695TN drive on an RS485 bus?
The DS3695TN presents less than one RS485 unit load, enabling up to 32 transceivers on a single bus segment without violating the RS485 standard's 32-unit-load limit. This is confirmed by the "Combined Impedance of a Driver Output and Receiver Input is Less than one RS485 Unit Load" feature statement and supported by the RIN = 12 kΩ receiver input resistance value in the Electrical Characteristics table. No external termination or biasing is required to achieve this scalability.
Is the DS3695TN compatible with both RS485 and RS422 standards?
Yes, the DS3695TN is explicitly designed to meet both EIA RS485 and RS422 specifications, as stated in the device description and FEATURES section of the SNLS072C datasheet. It supports RS485 multipoint bus operation (with DE/RE control) and RS422 point-to-point transmission (using DI/DO/DO), delivering 2 V differential output into 50 Ω for RS422 and 1.5 V into 27 Ω for RS485. AC and DC parameters are validated across 4.75 V to 5.25 V supply and 0°C to +70°C - with DS3695TN extending temperature coverage to −40°C to +85°C.
DS3695TN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DS3695TN FAQ
1.How can I place an order for DS3695TN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS3695TN 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 DS3695TN reliable?
The price and inventory of DS3695TN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS3695TN is usually 5 days.
3.What payment methods are accepted for DS3695TN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS3695TN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS3695TN?
DS3695TN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS3695TN 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 DS3695TN?
For technical support, including DS3695TN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS3695TN requirements.
6.How does Aetrix verify that DS3695TN is sourced from the original manufacturer or authorized distributors?
All DS3695TN 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 DS3695TN meets industry standards.
7.What is the process for return or replacement of DS3695TN?
All DS3695TN units undergo pre-shipment inspection (PSI). If there is an issue with DS3695TN, 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 DS3695TN part is unused and in its original packaging.
Return procedure for DS3695TN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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