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
What are the key features of LT1781ISW#PBF?
- 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
What is LT1781ISW#PBF used for?
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.
What are the specifications of LT1781ISW#PBF?
| 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 |
Where can I find the LT1781ISW#PBF datasheet?
LT1781ISW#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1781ISW#PBF?
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.
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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.
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| 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 |
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