SN75C1406NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN75C1406 is a low-power RS-232 line receiver and driver combination with 3 drivers, operating from a 4.5 V to 15 V supply. It provides EIA-232-compatible output levels with reduced power consumption compared to standard RS-232 transceivers, supporting serial communication interfaces. Packaged in a 16-pin DIP for through-hole serial port designs in embedded and industrial equipment.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN75C1406NG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN75C1406NG4?
- 3 RS-232 drivers with EIA-232 compliant output voltage swing
- Low-power operation from a 4.5 V to 15 V supply range
- Line receiver inputs with RS-232 threshold detection for noise-immune data reception
- 16-pin DIP package for through-hole and socketed serial interface designs
- Single-supply operation eliminating the need for dual ±12 V rails
- Compatible with standard RS-232 UART interfaces in embedded controllers
What is SN75C1406NG4 used for?
The SN75C1406 is used to interface microcontroller UART outputs to RS-232 serial ports in industrial automation equipment, measurement instruments, and legacy computer peripherals requiring EIA-232 compliant signal levels. Its 4.5 V to 15 V single-supply operation makes it suitable for systems powered from a 5 V or 12 V rail without requiring a dedicated charge pump or dual power supply. It is also employed in point-of-sale terminals, serial programming interfaces, and embedded SCADA systems where low-power RS-232 line driving reduces thermal dissipation in sealed enclosures.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN75C1406NG4 datasheet?
SN75C1406NG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN75C1406NG4?
Compatible alternatives and drop-in replacements for SN75C1406NG4:
Frequently Asked Questions
How does the SN75C1406 achieve RS-232 output levels from a single 5 V supply without a charge pump?
The SN75C1406 operates directly from a single supply between 4.5 V and 15 V and generates RS-232 compliant output swings of at least ±5 V (typically ±8 V at 5 V supply) by using an internal voltage doubler or driver topology that is compatible with EIA-232 driver specifications without requiring external charge pump capacitors. This simplifies the power supply design compared to classic RS-232 transceivers that require a ±12 V dual supply, reducing the total component count by eliminating the boost converter and its associated 100 nF to 1 µF charge pump capacitors.
Which serial communication applications are a fit for the SN75C1406's 3-driver configuration?
With 3 drivers, the SN75C1406 is suited for systems that need to simultaneously drive multiple RS-232 signals such as TXD, RTS, and DTR for a single full-handshaking serial port, or 3 independent one-way serial data outputs to separate peripherals. In industrial SCADA and measurement equipment, 3 driver channels allow connection to a serial printer, a barcode scanner, and a configuration port from a single IC. The 16-pin DIP package provides enough pin count to accommodate the driver inputs, outputs, supply, and ground connections without requiring a larger package.
How does the low-power feature of the SN75C1406 benefit battery-operated or sealed enclosure designs?
The SN75C1406's low-power design reduces quiescent current compared to standard RS-232 driver ICs that can consume 10 mA to 15 mA from the supply rail during idle. Lower power dissipation means less heat generation inside sealed or thermally constrained enclosures where operating temperatures can reach 70°C or above, reducing the risk of thermal derating. For portable instruments or handheld devices operating from a 9 V or 12 V battery, the reduced current draw directly extends battery life between charges or replacements.
For a new embedded design, when would you select the SN75C1406 over a modern MAX232-type transceiver with integrated charge pump?
The SN75C1406 is preferred when the design already has a 5 V to 15 V supply rail available and wants to avoid the 4 external charge pump capacitors (typically 100 nF to 1 µF each) required by MAX232-type devices, reducing BOM cost and PCB area by roughly 4 passives. Its 16-pin DIP footprint also fits standard IC sockets for field-replaceable applications in industrial service environments. MAX232-type devices are preferred when operating from a single 3.3 V supply or when the design requires a fully integrated transceiver with both transmit and receive channels in one package.
Related Guides
STM32H725IGT3 Selection Guide: Memory, Package, Temperature, and Supply
Choose the right STM32H725 variant by comparing Flash, package, pin count, temperature grade, connectivity, and production requirements.
Aug 1, 2026
STM32H725IGT3 High-Performance MCU Design Guide
Design STM32H725IGT3 systems for reliable 550 MHz operation with practical power, clock, cache, DMA, PCB, ADC, and recovery guidance.
Jul 31, 2026
150141VS73100 Violet SMD LED Selection Guide: Color, Drive, and Sourcing
Select the 150141VS73100 by wavelength, brightness, drive current, 3528 fit, reliability, and traceable sourcing requirements.
Jul 31, 2026
STEF05SGR 5 V eFuse Protection Design Guide
Design a reliable 5 V STEF05SGR eFuse stage with current-limit math, capacitor sizing, thermal analysis, fault recovery, and PCB layout guidance.
Jul 30, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit