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Texas Instruments DS14C335MSA
- Part No.:
- DS14C335MSA
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
DS14C335MSA.pdf
- Description:
- IC TRANSCEIVER FULL 3/5 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,255
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Product details
Overview
DS14C335MSA from Texas Instruments is a +3.3V single-supply, 3-driver/5-receiver TIA/EIA-232-E transceiver IC with integrated DC-DC converter, delivering ±9V RS-232 output levels, 128 kbps data rate support, and 10 μA shutdown current. It serves as the physical layer interface in laptop serial ports, enabling DTE-to-DCE communication with full voltage compliance while minimizing board space.
For engineers reviewing the DS14C335MSA datasheet, DS14C335MSA pinout, DS14C335MSA application, or DS14C335MSA equivalent, key selection criteria include its flow-through pinout for simplified PCB routing, active R5 receiver during shutdown for ring indicator monitoring, interoperability with +5V UARTs, and SSOP-28 package compatibility with legacy 9-pin serial port layouts.
Technical Context
The DS14C335MSA integrates a charge-pump DC-DC converter generating V+ ≈ +9.3V and V− ≈ −9.0V from a single 3.3V supply, eliminating external voltage rails. Its driver outputs meet TIA/EIA-232-E voltage swing (±5.0V to ±7.1V) and slew rate (≥4 V/μs) requirements at up to 128 kbps.
All five receivers feature hysteresis (50–300 mV), input resistance (3.0–7.0 kΩ), and ±25V input tolerance; only R5 remains functional during SHUTDOWN mode (SD = VCC), with adjusted threshold voltages (VTH = 2.0–2.8V, VTL = 0.1–0.5V) to maintain RI detection capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0V to 3.6V - Enables direct integration into modern 3.3V logic domains without level-shifting circuitry. |
| Driver Output Voltage | +5.0V to +7.1V / −5.0V to −6.3V - Meets TIA/EIA-232-E signal swing requirements for noise-immune cable transmission. |
| Max Data Rate | 128 kbps - Supports Lap-Link and standard PC serial communication speeds without timing violation. |
| Shutdown Current | 1.0–10 μA - Reduces system power consumption during idle states while retaining RI monitoring via R5. |
| Slew Rate | 4–30 V/μs - Ensures controlled edge rates to limit EMI and meet RS-232 rise/fall time specifications. |
| Receiver Input Range | ±25V - Withstands large ground potential differences and transient surges common in industrial cabling environments. |
| Operating Temperature | 0°C to +70°C - Qualified for commercial-grade embedded systems including portable computing equipment. |
Pinout & Package
DS14C335MSA is housed in a 28-lead Shrink Small Outline Package (SSOP), EIAJ Type II, package drawing DB, with 0.65 mm lead pitch and JEDEC MO-150 compliance. Dimensions: 10.50 mm × 5.90 mm × 1.75 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (3) | Primary power supply input | Accepts regulated +3.3V ±0.3V; powers internal logic and DC-DC converter core. |
| V+ (1) | Positive RS-232 driver supply rail | Internally generated ~+9.3V; requires 0.47 μF capacitor to GND for stability; not for external loading. |
| V− (25) | Negative RS-232 driver supply rail | Internally generated ~−9.0V; requires 0.47 μF capacitor to GND; not for external loading. |
| SHUTDOWN (23) | Low-power mode control input | Logic high (>2.0V) enables shutdown; reduces ICC to ≤10 μA while keeping R5 active for RI detection. |
| DIN 1–3 (7,8,9) | Driver input signals | 3.3V CMOS-compatible inputs; accept TTL/+5V logic directly without clamping diodes or resistors. |
| DOUT 1–3 (22,21,20) | RS-232 driver outputs | Deliver full EIA-232 voltage levels; flow-through layout aligns inputs and outputs on opposite sides for clean trace routing. |
| RIN 1–5 (19,18,17,16,15) | RS-232 receiver inputs | Accept ±25V input range; internal 5 kΩ pull-down ensures failsafe HIGH output when unused. |
| ROUT 1–5 (10,11,12,13,14) | Receiver output signals | 3.3V CMOS outputs; VOH ≥2.4V @ −1 mA ensures TTL compatibility; VOL ≤0.4V @ +2 mA. |
| GND (27) | Reference ground | Common return for all internal circuits; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC converter | Generates ±9V RS-232 compliant supplies from single 3.3V rail using only five 0.47 μF capacitors - eliminates dual-voltage regulators and saves >30% board area. |
| Flow-through pinout | Input pins (DIN/RIN) and output pins (DOUT/ROUT) are arranged on opposing edges of the SSOP package - enables straight-line PCB trace routing and minimizes crosstalk. |
| Active R5 in shutdown | Receiver R5 remains fully operational during SD = VCC mode with adjusted thresholds (VTH = 2.0–2.8V) - allows continuous ring indicator monitoring without waking entire system. |
| +5V UART interoperability | DIN and SD inputs tolerate 0–5.5V; ROUT outputs drive TTL loads - permits mixed-voltage systems (e.g., 3.3V transceiver + 5V microcontroller) without external level shifters. |
| ESD protection | HBM rating ≥2.0 kV - provides baseline handling robustness; external ESD protection still recommended for connector-facing lines per IEC 61000-4-2. |
Applications
| Laptop Serial Port Interface | Industrial RS-232 Terminal |
|---|---|
|
Use Scenario: Embedded serial interface in battery-powered notebook computers requiring compact, low-power RS-232 connectivity to modems or peripherals. IC Role / Device Role / Timing Role: Physical layer transceiver converting 3.3V UART signals to full EIA-232 voltage levels; manages power sequencing via SHUTDOWN pin. Use Value: Single-chip solution replaces discrete charge pumps and level shifters; 10 μA shutdown current extends battery life during idle periods while maintaining RI alert capability. |
Use Scenario: DIN-rail mounted HMI or PLC communicating over long RS-232 cables in factory automation environments with ground potential differences. IC Role / Device Role / Timing Role: Robust line driver/receiver providing ±25V input tolerance and 4 V/μs slew rate control to reject induced noise and ensure signal integrity. Use Value: Eliminates need for external surge suppression on RIN lines due to built-in ±25V rating; flow-through pinout simplifies isolation barrier layout between field and logic sides. |
| Mouse Power Delivery | Legacy Equipment Adapter |
|
Use Scenario: Supplying regulated +6V/−6V power to PS/2 or serial mice in desktop motherboards where dedicated mouse power rails are absent. IC Role / Device Role / Timing Role: Dual-role device: drivers act as voltage sources (VOH/VOL) for mouse V+/V−; one receiver accepts mouse data stream. Use Value: Confirmed by TI testing to deliver 10 mA @ +6V and 5 mA @ −6V - sufficient for standard optical mice without adding discrete DC-DC converters. |
Use Scenario: Retrofitting RS-232 interfaces into modern 3.3V microcontroller-based test equipment needing compatibility with legacy lab instruments. IC Role / Device Role / Timing Role: Voltage-level translator and signal conditioner bridging 3.3V logic domain to EIA-232 physical layer with guaranteed timing margins. Use Value: 128 kbps max data rate and 0.1–1.0 μs propagation delay ensure reliable communication with older GPIB-to-RS-232 converters and oscilloscopes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232ESE+ | 2-driver/2-receiver; uses different capacitor topology (4×0.1 μF); higher ICC (1 mA typical active, 1 μA shutdown) | Limited channel count; lacks R5 retention in shutdown; no native support for mouse power delivery | Select when only two channels needed and board space is extremely constrained; verify R5 functionality not required. |
| SP3232EEN-L | 3-driver/5-receiver; 3.0–5.5V supply range; lower max data rate (250 kbps); same SSOP-28 package | Broad supply flexibility but no confirmed mouse power capability; slightly higher shutdown current (1 μA typical) | Prefer for mixed 3.3V/5V systems where absolute minimum shutdown current is non-critical and full 128 kbps margin is retained. |
Compared with MAX3232ESE+ and SP3232EEN-L, DS14C335MSA uniquely combines 3×5 channel count, active R5 in shutdown, and validated mouse power delivery - making it the only option among the three qualified for laptop DTE designs requiring RI monitoring and peripheral power sourcing from a single IC.
Availability
DS14C335MSA is available at Aetrix Electronics and suitable for laptop serial interfaces, industrial terminal equipment, legacy equipment adapters, and embedded mouse power delivery systems requiring stable component supply across extended production lifecycles.
Supply support for DS14C335MSA 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, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The DS14C335MSA belongs to TI's legacy RS-232 interface product line, designed specifically to enable compact, low-power, single-supply serial communication in portable computing and embedded systems where board space and battery efficiency are critical constraints.
FAQ
What is the maximum data rate supported by the DS14C335MSA?
The DS14C335MSA supports a maximum data rate of 128 kbps, verified under load conditions (RL = 3 kΩ, CL = 50 pF) with propagation delays tPLH/tPHL ≤1.0 μs and slew rate ≥4 V/μs. This meets Lap-Link and standard PC serial port timing requirements without signal degradation.
Does the DS14C335MSA require external DC-DC converter components?
No, the DS14C335MSA integrates a complete charge-pump DC-DC converter and requires only five 0.47 μF external capacitors (C1–C5) to generate ±9V RS-232 compliant supplies from a single 3.3V rail - no inductors, transformers, or additional ICs are needed.
How does the SHUTDOWN mode function in the DS14C335MSA?
In SHUTDOWN mode (SD pin driven high), the DS14C335MSA reduces supply current to ≤10 μA while keeping receiver R5 fully active to monitor ring indicator (RI) signals. R5 operates with adjusted thresholds (VTH = 2.0–2.8V, VTL = 0.1–0.5V) to maintain detection accuracy during low-power operation.
Can the DS14C335MSA interface directly with +5V UARTs?
Yes, the DS14C335MSA supports direct interfacing with +5V UARTs: DIN and SHUTDOWN inputs tolerate 0–5.5V, and ROUT outputs provide VOH ≥2.4V at −1 mA - compatible with TTL input thresholds. No external level-shifting components are required.
What package type is used for the DS14C335MSA?
The DS14C335MSA uses a 28-lead Shrink Small Outline Package (SSOP), EIAJ Type II, package drawing DB, with 0.65 mm lead pitch and JEDEC MO-150 compliance. Its dimensions are 10.50 mm × 5.90 mm × 1.75 mm (max height), optimized for high-density PCB layouts.
DS14C335MSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 3/5
- Duplex:
- Full
- Receiver Hysteresis:
- 300 mV
- Data Rate:
- 128Kbps
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
DS14C335MSA FAQ
1.How can I place an order for DS14C335MSA through Aetrix?
Please submit a Request for Quotation (RFQ) for DS14C335MSA 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 DS14C335MSA reliable?
The price and inventory of DS14C335MSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS14C335MSA is usually 5 days.
3.What payment methods are accepted for DS14C335MSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS14C335MSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS14C335MSA?
DS14C335MSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS14C335MSA 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 DS14C335MSA?
For technical support, including DS14C335MSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS14C335MSA requirements.
6.How does Aetrix verify that DS14C335MSA is sourced from the original manufacturer or authorized distributors?
All DS14C335MSA 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 DS14C335MSA meets industry standards.
7.What is the process for return or replacement of DS14C335MSA?
All DS14C335MSA units undergo pre-shipment inspection (PSI). If there is an issue with DS14C335MSA, 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 DS14C335MSA part is unused and in its original packaging.
Return procedure for DS14C335MSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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