UC3843ANAlternatives & Equivalent Parts
About UC3843AN
UC3843AN is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Dual-In-Line Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | UC3843ANSource | SMW21R0JT | UC2844BN | UC3844BN | UC3843N |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | TE Connectivity | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Package Type | Dual-In-Line Packages | Resistor Moulded | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages |
| Pin Count | 8 | 2 | 8 | 8 | 8 |
| Temperature Range | ~ 70.0°C | ~ 280.0°C | -25.0°C ~ 85.0°C | ~ 70.0°C | ~ 70.0°C |
| Price | $0.3403 | $0.2305 | $0.4492 | $0.2472 | $0.4260 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | TRANSFERRED | ACTIVE | ACTIVE | ACTIVE |
| Electrical Parameters | |||||
| Pbfree Code | Yes | Yes | — | — | Yes |
| YTEOL | 15 | — | 6 | 6 | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER | — | SWITCHING CONTROLLER | SWITCHING CONTROLLER | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE | — | CURRENT-MODE | CURRENT-MODE | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION | — | PULSE WIDTH MODULATION | PULSE WIDTH MODULATION | PULSE WIDTH MODULATION |
| Input Voltage-Max | 28 V | — | 30 V | 30 V | 28 V |
| Input Voltage-Min | 8.2 V | — | 11 V | 11.5 V | 8.2 V |
| Input Voltage-Nom | 15 V | — | 15 V | 15 V | 15 V |
| JESD-30 Code | R-PDIP-T8 | — | R-PDIP-T8 | R-PDIP-T8 | R-PDIP-T8 |
| JESD-609 Code | e4 | e3 | e3 | e4 | e4 |
| Number of Functions | 1 | — | 1 | 1 | 1 |
| Output Current-Max | 1 A | — | 1 A | 1 A | 1 A |
| Output Voltage-Max | 5.1 V | — | — | — | — |
| Output Voltage-Min | 4.9 V | — | — | — | — |
| Output Voltage-Nom | 5 V | — | — | — | 5 V |
| Package Body Material | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 | — | DIP8,.3 | DIP8,.3 | DIP8,.3 |
| Package Shape | RECTANGULAR | RECTANGULAR PACKAGE | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | IN-LINE | — | IN-LINE | IN-LINE | IN-LINE |
| Qualification Status | Not Qualified | — | Not Qualified | Not Qualified | Not Qualified |
| Supply Current-Max (Isup) | 25 mA | — | — | — | 25 mA |
| Supply Voltage-Max (Vsup) | 28 V | — | — | — | 28 V |
| Supply Voltage-Min (Vsup) | 8.4 V | — | — | — | 8.4 V |
| Supply Voltage-Nom (Vsup) | 11 V | — | — | — | — |
| Surface Mount | NO | YES | NO | NO | NO |
| Switcher Configuration | BUCK-BOOST | — | SINGLE | SINGLE | BUCK-BOOST |
| Switching Frequency-Max | 500 kHz | — | 500 kHz | 500 kHz | 500 kHz |
| Technology | BIPOLAR | WIRE WOUND | BIPOLAR | BIPOLAR | BICMOS |
| Temperature Grade | COMMERCIAL | — | COMMERCIAL EXTENDED | COMMERCIAL | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | Tin (Sn) | Matte Tin (Sn) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE | — | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE |
| Terminal Pitch | 2.54 mm | — | 2.54 mm | 2.54 mm | 2.54 mm |
| Terminal Position | DUAL | — | DUAL | DUAL | DUAL |
| ## UC3843AN Alternates Showing results | Image | — | — | — | — |
| Reach Compliance Code | — | Unknown | — | — | — |
| Factory Lead Time | — | 29 Weeks, 2 Days | 14 Weeks | 14 Weeks | — |
| Mounting Feature | — | SURFACE MOUNT | — | — | — |
| Packing Method | — | TR | — | — | — |
| Rated Power Dissipation (P) | — | 2 W | — | — | — |
| Rated Temperature | — | 25 °C | — | — | — |
| Resistance | — | 1 Ω | — | — | — |
| Resistor Type | — | FIXED RESISTOR | — | — | — |
| Size Code | — | 4122 | — | — | — |
| Temperature Coefficient | — | 200 ppm/°C | — | — | — |
| Terminal Shape | — | WRAPAROUND | — | — | — |
| Tolerance | — | 5% | — | — | — |
| Working Voltage | — | 300 V | — | — | — |
| Dimensions: Product Length .264 INCH | — | Product Height 3.55 MM | — | — | — |
| Product Length 6.7 MM | — | Product Width 4 MM | — | — | — |
| Electrical Characteristics: Operating Voltage 300 V | — | Passive Component Tolerance 5 PCT | — | — | — |
| Power Rating 2 WATT | — | Resistance Value 1 OHM | — | — | — |
| Product Type Features: Element Type Wire Wound | — | Resistor Type Power Resistor | — | — | — |
| ## UC2844BN Alternates Showing results | — | — | Image | — | — |
| ## UC3844BN Alternates Showing results | — | — | — | Image | — |
| ## UC3843N Alternates Showing results | — | — | — | — | Image |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 4 alternatives for UC3843AN — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for UC3843AN is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating UC3843AN replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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FAQ
What is equivalent to UC3843AN?
Known equivalents for UC3843AN include SMW21R0JT, UC2844BN, UC3844BN. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of UC3843AN?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify UC3843AN alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.