DS8921N NOPB Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments DS8921N NOPB is a single RS-422 differential line transmitter/receiver in an 8-pin PDIP package, enabling high-noise-immunity serial data communication over long cable runs. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- DS8921N NOPB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of DS8921N NOPB?
- RS-422 differential signaling rejects common-mode noise up to ±7 V, enabling reliable data transmission over cable lengths exceeding 100 m
- Integrated single transmitter and receiver in one 8-pin PDIP package reduces BOM and simplifies point-to-point serial communication design
- Compatible with standard TTL logic levels and 5 V supply, allowing direct interface to legacy microcontrollers and industrial PLCs
What is DS8921N NOPB used for?
The DS8921N NOPB is designed for point-to-point RS-422 serial communication links in industrial automation, CNC machine tool control, and data acquisition systems requiring immunity to electrical noise over distances up to 1200 m. Its differential signaling architecture makes it well-suited for factory floor environments where ground loops and electromagnetic interference degrade single-ended UART signals. The device also serves in legacy equipment maintenance and repair scenarios where 8-pin PDIP through-hole RS-422 transceivers are required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the DS8921N NOPB datasheet?
DS8921N NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for DS8921N NOPB?
Compatible alternatives and drop-in replacements for DS8921N NOPB:
Frequently Asked Questions
What communication standard does DS8921N NOPB implement, and what cable length does it support reliably?
The DS8921N NOPB implements the RS-422 differential balanced serial communication standard. RS-422 supports cable lengths up to 1200 m at lower baud rates and up to approximately 100 m at data rates near 10 Mbps. The differential signaling provides common-mode noise rejection of ±7 V, making it far more robust than RS-232 on long industrial cable runs subject to electromagnetic interference from motors and inverters.
How does the DS8921N NOPB differ from an RS-485 transceiver, and when should designers choose RS-422 instead?
RS-422 (used in DS8921N) is point-to-point full-duplex, while RS-485 is multi-drop half-duplex. Designers should choose RS-422 when a single transmitter drives a single receiver continuously without bus sharing, such as encoder feedback links or printer data interfaces, where full-duplex operation at data rates up to several Mbps and cable spans of 100 m to 300 m are needed without the complexity of bus arbitration logic.
What supply voltage and logic-level compatibility does DS8921N NOPB offer for integration with legacy systems?
The DS8921N NOPB operates from a 5 V supply and is compatible with TTL input and output logic levels, with input thresholds near 1.5 V and output swing from 0 V to 5 V. This makes it directly interoperable with legacy 5 V TTL and CMOS microcontrollers, industrial PLCs, and FPGA I/O banks configured for 5 V logic, without requiring level-shifting circuitry in most direct-replacement or upgrade scenarios.
What package does DS8921N NOPB come in, and is it suitable for both prototyping and production use?
The DS8921N NOPB is supplied in an 8-pin PDIP (Dual In-line Package) through-hole format, which is compatible with standard 0.1-inch breadboards and DIP sockets for rapid prototyping. For production, the PDIP package suits wave-soldering and hand-assembly processes, making it appropriate for low-to-medium volume industrial equipment where through-hole reliability under vibration is preferred over surface-mount alternatives.
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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.
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