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Texas Instruments DS3695N
- Part No.:
- DS3695N
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DS3695N.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,722
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Product details
Overview
DS3695N from Texas Instruments is a half-duplex RS-485/RS-422 transceiver IC designed for multipoint bus transmission in industrial communication systems. It features 15 ns typical driver propagation delay, ±7V ground difference tolerance between devices, and −7V to +12V bus common-mode voltage range. The device operates from a single +5V supply and supports up to 32 unit loads on the bus.
For engineers reviewing the DS3695N datasheet, DS3695N pinout, DS3695N application, or DS3695N equivalent, this transceiver delivers high-speed differential signaling with thermal shutdown protection, TRI-STATE driver/receiver control, and robust fault tolerance for factory automation, building control networks, and point-of-sale terminals.
Technical Context
The DS3695N implements a true differential driver with complementary DO/DO outputs and a differential receiver with RI/RI inputs, supporting both RS-485 and RS-422 protocols. Its driver enables/disables via DE pin and receiver enables/disables via RE pin, with independent control logic verified in Table 1 and Table 2 of SNLS072C.
It integrates thermal shutdown protection that forces driver outputs into high-impedance state across the full −7V to +12V common-mode range. Unlike DS3696, DS3695N lacks the TS (thermal shutdown indicator) pin - confirmed by absence in DS3695-specific function tables and package diagrams.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75V to 5.25V - ensures stable operation under standard 5V rail tolerances without external regulation. |
| Bus Common-Mode Range | −7V to +12V - permits ±7V ground potential difference between nodes, critical for noisy industrial environments. |
| Driver Propagation Delay | 15 ns typical - enables reliable data rates up to ~30 Mbps over short stubs per timing analysis in Figure 8. |
| Receiver Hysteresis | 70 mV typical - suppresses false switching due to noise on long cables or unterminated buses. |
| Unit Load Count | ≤1 - allows up to 32 transceivers on one RS-485 bus segment without signal integrity degradation. |
| Thermal Shutdown | Active protection - disables driver outputs during overtemperature events, preventing latch-up or damage. |
| TRI-STATE Control | Independent DE and RE pins - enables precise bus arbitration and multi-drop half-duplex operation. |
Pinout & Package
DS3695N is housed in an 8-pin plastic dual in-line package (PDIP), package drawing P (R-PDIP-T8), RoHS-compliant with CU SN finish and no Sb/Br.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DI) | Driver Input | Accepts TTL/CMOS-level transmit data; VIH = 2V min, VIL = 0.8V max ensures compatibility with 5V microcontrollers. |
| 2 (DE) | Driver Enable | Active-high control: drives bus when high, enters high-Z when low - essential for half-duplex bus sharing. |
| 3 (RO) | Receiver Output | TTL/CMOS-compatible output; VOH ≥ 2.4V at −400 μA, VOL ≤ 0.5V at 16 mA - directly interfaces with logic inputs. |
| 4 (RE) | Receiver Enable | Active-low control: enables receiver when low, disables (high-Z) when high - prevents bus contention during transmit. |
| 5 (GND) | Ground Reference | Signal return path for internal circuitry; must be connected to local system ground to maintain common-mode integrity. |
| 6 (A / DO) | Driver Output A / Non-Inverting | Differential bus line A; outputs complementary to pin 7 - forms RS-485 differential pair with 5V swing capability. |
| 7 (B / DO) | Driver Output B / Inverting | Differential bus line B; complements pin 6 - defines polarity per EIA-485 standard (A = +, B = −). |
| 8 (VCC) | Power Supply | +5V supply input; ICC = 42–60 mA active, 27–40 mA disabled - informs power budgeting for multi-node systems. |
Key Features
| Feature | Design Value |
|---|---|
| EIA-485 & RS-422 Compliance | Fully meets electrical requirements including unit load, common-mode range, and differential output voltage - eliminates protocol validation risk. |
| Full-Range TRI-STATE Operation | Driver remains high-impedance over entire −7V to +12V bus common-mode range - prevents bus lockup during ground faults. |
| Thermal Shutdown Protection | Automatically disables driver outputs during overtemperature events - avoids destructive failure under sustained bus short-circuit conditions. |
| 70 mV Receiver Hysteresis | Reduces susceptibility to noise-induced glitches on long or poorly terminated lines - improves bit error rate in real-world installations. |
| Single +5V Supply | Eliminates need for dual-rail or charge-pump circuitry - simplifies PCB layout and reduces BOM count in cost-sensitive designs. |
Applications
| Industrial PLC Networks | Building Automation Systems |
|---|---|
|
Use Scenario: Multi-node Modbus RTU communication between programmable logic controllers, I/O modules, and HMIs in factory settings with high EMI. IC Role / Device Role / Timing Role: Half-duplex RS-485 transceiver providing robust physical layer interface with ±7V ground tolerance and thermal fault protection. Use Value: Enables reliable 115.2 kbps+ communication over 1200 m cable runs while surviving motor drive noise and ground loops. |
Use Scenario: Distributed HVAC controller network connecting thermostats, VAV boxes, and central BAS servers across large commercial buildings. IC Role / Device Role / Timing Role: RS-485 line driver/receiver managing shared bus arbitration via DE/RE control in BACnet MS/TP implementations. Use Value: Supports up to 32 nodes per segment with 70 mV hysteresis rejecting lighting ballast and elevator motor noise. |
| Retail Point-of-Sale Terminals | Energy Meter Data Collection |
|
Use Scenario: Interconnecting cash registers, barcode scanners, and receipt printers via daisy-chained RS-485 links in retail environments. IC Role / Device Role / Timing Role: Half-duplex transceiver handling bidirectional polling-based communication with strict timing control via DE/RE strobes. Use Value: 15 ns propagation delay ensures deterministic response within tight transaction timing windows (<100 μs round-trip). |
Use Scenario: AMR (Automatic Meter Reading) concentrators collecting consumption data from hundreds of smart electricity meters over long-distance RS-485 trunk lines. IC Role / Device Role / Timing Role: Bus node transceiver with −7V to +12V common-mode range accommodating meter-to-concentrator ground offsets in outdoor deployments. Use Value: High-impedance disable mode allows powered-down meters to remain electrically isolated without loading the bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX485CPA+ | SO-8 package only; no PDIP option; 2.5V to 5.5V supply range; no thermal shutdown circuit. | Lacks thermal protection and PDIP footprint - unsuitable for legacy through-hole designs or high-fault-risk installations. | Select MAX485CPA+ only if SO-8 layout is fixed and thermal fault exposure is negligible. |
| SN65HVD72DR | 3.3V-only supply; integrated IEC 61000-4-2 ESD protection (±15kV air); 1/8 unit load; no PDIP package. | Requires level-shifting for 5V MCU interfaces; higher ESD rating but incompatible pinout and voltage domain. | Choose SN65HVD72DR only for new 3.3V designs needing certified ESD robustness and space-constrained layouts. |
Compared with DS3695N, MAX485CPA+ offers wider supply flexibility but omits thermal shutdown and PDIP packaging, while SN65HVD72DR provides superior ESD immunity yet mandates 3.3V operation and surface-mount assembly - DS3695N remains optimal for 5V through-hole industrial RS-485 nodes requiring fault resilience and legacy compatibility.
Availability
DS3695N is available at Aetrix Electronics and suitable for industrial PLC networks, building automation systems, and retail point-of-sale terminals requiring stable component supply across extended product lifecycles.
Supply support for DS3695N 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.
The DS3695N belongs to TI's legacy RS-485 transceiver portfolio, engineered specifically for robust multipoint data transmission in electrically noisy industrial environments with wide ground potential variation.
FAQ
What is the operating temperature range for the DS3695N?
The DS3695N is specified for commercial-grade operation from 0°C to +70°C ambient temperature, as confirmed in the Recommended Operating Conditions table of SNLS072C. This range aligns with its PDIP packaging and intended use in controlled indoor industrial and commercial equipment. The DS3695T variant extends to −40°C to +85°C, but DS3695N does not support industrial temperature operation.
Does the DS3695N include a thermal shutdown indicator pin like the DS3696?
No, the DS3695N does not include a TS (thermal shutdown) pin. Function Tables 1 and 2 in SNLS072C explicitly list TS only for DS3696, and the DS3695-specific pin diagram (Figure 1) shows no TS terminal. Thermal shutdown is implemented internally and forces driver outputs into high-impedance state, but no status reporting is provided on DS3695N.
Can the DS3695N be used in full-duplex RS-422 configurations?
No, the DS3695N is a half-duplex transceiver with shared A/B differential bus lines and separate DI/RO data paths - it lacks independent transmit and receive differential pairs required for full-duplex RS-422. Its pinout and functional description confirm single-directional bus access controlled by DE/RE, making it suitable only for RS-485 or half-duplex RS-422 topologies.
What is the maximum number of DS3695N transceivers supported on a single RS-485 bus segment?
The DS3695N presents ≤1 RS-485 unit load, as stated in the "Combined Impedance" feature and Electrical Characteristics section. This allows up to 32 DS3695N devices on a single bus segment without exceeding the EIA-485 standard's 32-unit-load limit - a key design parameter verified across all operating conditions in SNLS072C.
Is the DS3695N RoHS compliant and lead-free?
Yes, the DS3695N/NOPB ordering part number is RoHS compliant and lead-free, as documented in TI's PACKAGE OPTION ADDENDUM (23-Aug-2017): "Green (RoHS & no Sb/Br)" with "CU SN" lead finish. The /NOPB suffix explicitly denotes lead-free packaging, and MSL Level-1 rating confirms moisture sensitivity compliance for standard assembly processes.
DS3695N 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
DS3695N FAQ
1.How can I place an order for DS3695N through Aetrix?
Please submit a Request for Quotation (RFQ) for DS3695N 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 DS3695N reliable?
The price and inventory of DS3695N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS3695N is usually 5 days.
3.What payment methods are accepted for DS3695N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS3695N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS3695N?
DS3695N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS3695N 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 DS3695N?
For technical support, including DS3695N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS3695N requirements.
6.How does Aetrix verify that DS3695N is sourced from the original manufacturer or authorized distributors?
All DS3695N 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 DS3695N meets industry standards.
7.What is the process for return or replacement of DS3695N?
All DS3695N units undergo pre-shipment inspection (PSI). If there is an issue with DS3695N, 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 DS3695N part is unused and in its original packaging.
Return procedure for DS3695N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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