Cross-reference
These pages compare pinout, limits and the conditions that make a substitute acceptable. They are not a catalog.
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AMS1117 Equivalents – Datasheet-Checked Pin-Compatible Parts
TI LM1117, ST LD1117 and JSCJ CJT1117B checked line by line against the AMS1117 datasheet: SOT-223 pinout, dropout, min load, capacitor and heat.
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CH340G Alternatives – CH340C, CH340E, CP2102, FT232RL Compared
What changes when you swap a CH340G: pinout, crystal, supply, baud rate, temperature and USB IDs for CH340C, CH340E, CP2102 and FT232RL, from each datasheet.
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LM2596 Equivalents – TI vs onsemi vs XL2596 Checked
TI LM2596, onsemi LM2596 and XLSEMI XL2596 compared pin by pin: saturation voltage, duty cycle, current limit and ON/OFF thresholds. XL1509 needs a new layout.
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TL431 SOT-23 Marking Codes (T3C3, TAC3, T3G3) & Pinout
Decode TI TL431/TL432 SOT-23 (DBZ) markings into grade (0.5/1/2%) and temperature range, from TI's package addendum, and avoid the TL431 vs TL432 pin swap.