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SN75C3221EDBR
Texas Instruments
IC TRANSCEIVER FULL 1/1 16SSOP
2108 Pcs New Original In Stock
1/1 Transceiver Full RS232 16-SSOP
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5.0 / 5.0
- (472 Ratings)
SN75C3221EDBR
Product Overview
1857985
DiGi Electronics Part Number
SN75C3221EDBR-DGManufacturer
Texas Instruments
SN75C3221EDBR
Description
IC TRANSCEIVER FULL 1/1 16SSOPInventory
2108 Pcs New Original In Stock
1/1 Transceiver Full RS232 16-SSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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SN75C3221EDBR Technical Specifications
Category
Interface, Drivers, Receivers, Transceivers
Packaging
Tape & Reel (TR)
Series
-
Product Status
Last Time Buy
Type
Transceiver
Protocol
RS232
Number of Drivers/Receivers
1/1
Duplex
Full
Receiver Hysteresis
500 mV
Data Rate
1Mbps
Voltage - Supply
3V ~ 5.5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SSOP (0.209", 5.30mm Width)
Supplier Device Package
16-SSOP
Base Product Number
75C3221
Datasheet & Documents
HTML Datasheet
SN75C3221EDBR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
SN75C3221EDBRG4-DG
SN75C3221EDBRG4
-296-21071-1
-296-21071-1-DG
-SN75C3221EDBRG4-NDR
2156-SN75C3221EDBR
TEXTISSN75C3221EDBR
296-21071-6
296-21071-1
-SN75C3221EDBR-NDR
-SN75C3221EDBRG4
296-21071-2
Standard Package
2,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Le produit est arrivé bien emballé, sécurité assurée, je recommande fortement.
de desembre 02, 2025
DiGi Electronicsの梱包はとても丁寧で、安全に商品が届くので安心感があります。
de desembre 02, 2025
The craftsmanship is top-notch; every detail seems carefully considered, reflecting superior quality.
de desembre 02, 2025
DiGi Electronics' focus on quality helps me deliver better service to my customers.
de desembre 02, 2025
DiGi Electronics makes it easy to choose sustainable options that fit my budget.
de desembre 02, 2025
They provided excellent post-purchase support.
de desembre 02, 2025
Quick shipping combined with excellent after-sales care impressed me.
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Frequently Asked Questions (FAQ)
Can I replace a failing MAX3226EAE+ with the SN75C3221EDBR in an existing RS232 interface design, and what design-in risks should I watch for?
Yes, the SN75C3221EDBR can serve as a drop-in replacement for the MAX3226EAE+ in most 1/1 full-duplex RS232 applications, but caution is required. While both devices support 3V to 5.5V operation and comparable data rates up to 1Mbps, the SN75C3221EDBR has different ESD protection levels and charge pump design, potentially affecting robustness in electrically noisy environments. Additionally, the SN75C3221EDBR is listed as Last Time Buy, indicating potential long-term availability risks. Always verify PCB layout compatibility—especially capacitor placement for the voltage converter—and confirm that your host processor can tolerate the slightly different slew rates to avoid signal integrity issues in high-noise industrial settings.
How does the SN75C3221EDBR perform in mixed 3.3V and 5V logic systems, and what level-shifting considerations apply when integrating it with microcontrollers?
The SN75C3221EDBR supports a wide 3V to 5.5V supply range, making it suitable for both 3.3V and 5V logic systems without external level shifters. Its CMOS/TTL inputs and outputs are compatible across this range, simplifying integration with modern microcontrollers. However, when interfacing with 3.3V MCUs in a 5V-powered SN75C3221EDBR setup, ensure the MCU’s GPIOs are 5V-tolerant—otherwise, damage may occur. A safe design practice is to power the SN75C3221EDBR from the same 3.3V rail as the MCU when feasible, preserving signal integrity and eliminating overvoltage risks while maintaining reliable RS232 voltage levels through the internal charge pump.
Is the SN75C3221EDBR suitable for industrial environments near motors or variable frequency drives, and how does its 500 mV receiver hysteresis impact noise immunity?
The SN75C3221EDBR’s 500 mV receiver hysteresis provides moderate noise immunity, beneficial in electrically noisy industrial settings where ground shifts or EMI from motors may distort RS232 signals. However, unlike some higher-end transceivers (e.g., MAX3227 or TRS3227CDBR) that include enhanced ESD and transient protection, the SN75C3221EDBR relies on external TVS diodes for robust field operation. For reliable use near VFDs or relays, pair the SN75C3221EDBR with RC filtering on the board and ensure a solid ground plane. Avoid long cable runs without shielding to minimize coupling—its performance is acceptable but not optimal for harsh environments without supplemental protection.
What are the critical reliability concerns when using the SN75C3221EDBR in a sealed outdoor enclosure with passive heating?
When deploying the SN75C3221EDBR in sealed outdoor enclosures, thermal buildup is a primary reliability concern. The device is rated for 0°C to 70°C operating temperature, but passive solar heating can easily exceed 70°C, risking performance degradation or failure. Even with its 16-SSOP package’s surface-mount efficiency, limited airflow restricts heat dissipation. To mitigate risk, derate the operating margin: target worst-case internal temps below 60°C. Include a thermal analysis of the enclosure, consider adding a small heatsink or thermal pad under the PCB, and power down during idle cycles if communications are intermittent. Also, monitor long-term supply voltage stability, as overvoltage from unregulated sources accelerates wear-out.
How does the SN75C3221EDBR compare to the TRS3227ECDBR in terms of power consumption and suitability for battery-powered designs?
The SN75C3221EDBR typically draws higher supply current (about 6mA at steady state) compared to the TRS3227ECDBR, which features lower quiescent current and auto-powerdown modes ideal for battery-powered applications. If your system requires extended battery life or frequent idle states, the TRS3227ECDBR is superior. However, the SN75C3221EDBR remains viable for intermittently used industrial handhelds or metering devices with periodic wake-ups, provided firmware aggressively manages enable/disable cycles via the /ENABLE pin. To optimize power with the SN75C3221EDBR, disable the transmitter when not in use and ensure the charge pump capacitors are low-leakage types to reduce parasitic drain in sleep modes.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
SN75C3221EDBR CAD Models
Texas Instruments SN75C3221EDBR PCB symbols & footprints
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