SN75155DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN75155DG4 is a single-channel RS-232 line transceiver from Texas Instruments in an 8-pin SOIC package with a built-in 5V regulator and Schmitt trigger inputs. It complies with EIA-232-E and TIA-232-E standards for reliable serial communications. Available from stock worldwide for embedded serial port and industrial modem interface designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- SN75155DG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN75155DG4?
- EIA-232-E compliant line transceiver with Schmitt trigger input for noise-immune RS-232 data reception
- Built-in 5V regulator eliminates external voltage regulation circuitry in single-supply RS-232 interface designs
- 8-pin SOIC package with response control reduces component count in compact serial communication modules
What is SN75155DG4 used for?
The SN75155DG4 provides a complete single-channel RS-232 transceiver solution for embedded systems, industrial PLCs, and test equipment requiring EIA-232-E compliant serial communication. The integrated 5V regulator and Schmitt trigger inputs simplify PCB design by eliminating external supply generation and improving noise margin on long cable runs. It is suitable for RS-232 port implementations in space-constrained 8-pin SOIC footprints where a full multi-channel transceiver would be oversized.
What are the specifications of SN75155DG4?
| YTEOL | 0 |
| Additional Feature | RESPONSE CONTROL; BUILT IN 5V REGULATOR |
| Differential Output | NO |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.000005A |
| Input Characteristics | SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-232-E; TIA-232-E; V.28 |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Out Swing-Min | 6.4V |
| Output Characteristics | TOTEM-POLE |
| Output Low Current-Max | 0.024A |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 245ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 14mA |
| Supply Voltage-Max | 15V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 12V |
| Supply Voltage1-Max | 15V |
| Supply Voltage1-Min | 4.5V |
| Supply Voltage1-Nom | 12V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 150ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN75155DG4 datasheet?
SN75155DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN75155DG4?
Compatible alternatives and drop-in replacements for SN75155DG4:
Frequently Asked Questions
What integrated features of the SN75155DG4 reduce external component count in an RS-232 interface circuit?
The SN75155DG4 integrates a built-in 5V regulator and Schmitt trigger inputs within its 8-pin SOIC package. The on-chip 5V regulator means the device can operate from a single unregulated supply without an external voltage regulator IC, and the Schmitt trigger receiver input adds hysteresis that rejects noise and slow signal edges common on RS-232 cable runs meeting the EIA-232-E and TIA-232-E standards.
How does the Schmitt trigger input of the SN75155DG4 improve signal integrity on an RS-232 cable connection?
The Schmitt trigger input provides built-in hysteresis, so the SN75155DG4 receiver ignores noise spikes and slow signal transitions near the switching threshold. On RS-232 lines using capacitively loaded cables up to several meters, the signal edges often have finite slew rates that would cause multiple toggling on a standard comparator input. The Schmitt trigger ensures a clean single digital transition for each incoming bit, with maximum input current as low as 5 µA.
In which applications is the single-channel SN75155DG4 more appropriate than a dual or quad RS-232 transceiver?
The SN75155DG4 is the right choice when a design needs exactly 1 RS-232 channel, such as a dedicated debug console port, a single modem interface, or a one-wire control link to an industrial sensor. Using a single-channel 8-pin SOIC avoids routing unused channels and wasting the charge pump capacitors required by multi-channel RS-232 transceivers, saving board space and reducing BOM cost for EIA-232-E compliant serial port designs.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 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