LT1781ISW#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1781ISW#PBF is a low-power RS-232 line transceiver IC in a 16-pin SOIC package. It integrates 2 drivers and 2 receivers with 15 kV ESD protection on RS-232 I/O pins, operating from a single 5 V supply. Designed for space-constrained serial communication interfaces in industrial, embedded, and portable computing equipment.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LT1781ISW#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.3100(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 15 kV ESD protection on all RS-232 driver and receiver pins guards against electrostatic discharge in harsh environments
- Dual driver and dual receiver (2x driver/2x receiver) in a 16-pin SOIC package enables full-duplex RS-232 communication
- Low-power design operates from a single 5 V supply with minimal quiescent current for battery and power-sensitive applications
- SOIC-16 (SW16) package provides compact PCB footprint compatible with standard 1.27 mm pitch land patterns
- JESD-609 e3 compliant, RoHS-compatible process for environmentally responsible manufacturing
Applications
The LT1781ISW#PBF is ideal for embedded systems, industrial controllers, and portable instruments that require a reliable RS-232 serial interface with strong ESD immunity. Its dual driver/receiver configuration supports full RS-232 communication between microcontrollers and peripheral devices such as modems, barcode scanners, and human-machine interfaces over standard DB-9 or DB-25 connectors. The low-power 5 V single-supply operation makes it especially suitable for battery-powered equipment and compact PCB designs where minimal external components are desired.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1620 (SW16) |
| YTEOL | 9 |
| Driver Number of Bits | 2 |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | GENERAL PURPOSE |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e3 |
| Number of Functions | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receiver Number of Bits | 2 |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What ESD protection level does the LT1781ISW#PBF provide on its RS-232 pins?
The LT1781ISW#PBF offers 15 kV ESD protection on all RS-232 driver and receiver pins, significantly exceeding the 2 kV human body model level required by many standards. This high ESD rating protects the 2-driver, 2-receiver interface from electrostatic discharge during cable hot-plugging or field handling, making it suitable for industrial and test equipment where RS-232 ports are frequently connected and disconnected.
How many drivers and receivers are integrated in the LT1781ISW#PBF, and what supply voltage does it require?
The LT1781ISW#PBF integrates 2 RS-232 drivers and 2 RS-232 receivers in a single 16-pin SOIC package, supporting full-duplex serial communication. It operates from a single 5 V supply and uses an internal charge pump to generate the ±8 V voltages required for RS-232 signal levels, eliminating the need for a separate dual supply and reducing BOM complexity in embedded designs.
Which communication-intensive embedded designs benefit from the LT1781ISW#PBF's low-power RS-232 transceiver?
Battery-powered data loggers, handheld test instruments, and industrial PLC communication modules benefit most from the LT1781ISW#PBF. Its low-power 5 V single-supply design with 2 full-duplex RS-232 channels allows microcontrollers running at 3.3 V or 5 V to interface directly with legacy RS-232 peripherals. Applications with duty-cycled serial links particularly benefit because the device draws minimal quiescent current when idle, extending battery life in portable equipment.
What package does the LT1781ISW#PBF use and how does it compare to DIP alternatives for PCB layout?
The LT1781ISW#PBF uses a 16-pin SOIC (SW16, JESD-30 code R-PDSO-G16) with 1.27 mm lead pitch, occupying roughly half the PCB area of an equivalent 16-pin DIP package. This surface-mount footprint enables denser board layouts and automated pick-and-place assembly, making the LT1781ISW#PBF preferable to through-hole alternatives in modern high-density designs requiring 2 RS-232 channels with 15 kV ESD protection.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $11.8900 | $11.89 |
| 10+ | $8.1600 | $81.60 |
| 19+ | $7.0400 | $133.76 |
| 500+ | $6.2900 | $3145.00 |
| 1000+ | $5.3100 | $5310.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”