STM32F103CBT6 Alternatives: 128 KB Flash MCU Guide
The same die, the same 48-pin footprint, twice the flash — and the firmware work most people forget before they swap.
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Chip-seek Blog
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TP4056 Alternatives: Li-Ion Charger Cross-Reference
The one-amp linear charger on millions of USB boards: what to match, what to add for safety, and when a linear charger is the wrong choice.
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ULN2003A Alternatives: Darlington Array Cross-Reference
Seven channels, built-in clamp diodes, and a pinout that has not changed in forty years — what to check before you substitute one.
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W25Q64 Alternatives: 64 Mbit NOR Cross-Reference
The 8 MB SPI flash behind a million embedded designs: package traps, firmware checks, and when 64 Mbit is still the right density.
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MAX3232 Alternatives: RS-232 Transceiver Cross-Reference
The 16-pin transceiver that turns 3.3 V logic into RS-232: which parts really fit, and why the charge-pump capacitors decide the outcome.
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AMS1117-3.3 Alternatives: LDO Cross-Reference Guide
The three-terminal regulator on millions of boards: which parts really fit, and why the thermal math matters more than the pinout.
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LM2596 Alternatives: Drop-In and Functional Options
A 3 A buck converter that refuses to die: which replacements fit the same pads, which need a new layout, and how to choose between them.
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STM32F103C8T6 Alternatives: Pin-to-Pin Cross-Reference
The 48-pin Cortex-M3 that became an industry default: which alternatives really fit, and what breaks when you swap one in.
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W25Q32 Alternatives: 32 Mbit NOR Cross-Reference
4 MB of SPI flash: the smallest density that still supports OTA, and the one where package width trips up more designs than density does.
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W25Q128JVSIQ Alternatives: NOR Flash Cross-Reference
A practical cross-reference for the 128 Mbit SPI NOR part: what must match, where firmware breaks, and how to qualify a second source.
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Murata Silicon Capacitors: AI Optical Module Power
Murata is positioning wideband silicon capacitors as a key enabler of the optical-module speed ramp from 1.6T to 3.2T. Here is what the shift means for AI data-center interconnect and...
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TMS320F28035 Alternatives: LS-Z3xF Pin-to-Pin Guide
The LS-Z3xF family maps to F28034/35 by package and adds clock headroom. What pin compatibility covers, what it does not, and how to qualify it.
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