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.
Read articleComponent catalog
Products whose audited custom lifecycle status is exactly Obsolete.
CY27410LTXI-008 - Infineon Technologies, QFN
CY2548QC003 - Infineon Technologies, QFN
CY22801SXC-038 - Infineon Technologies, SOIC-8
CY25404ZXI011 - Infineon Technologies, TSSOP-20
CY25404ZXI241 - Infineon Technologies, TSSOP-20
PI6LC48P03LIEX - DIODES, TSSOP-24
CY25100ZXIFT - Infineon Technologies, SOP
CDCE421RGER - Texas Instruments Clock IC, VQFN-24
CY25100SXC-062T - Infineon Technologies, SOIC-8
AM27S25APC - Rochester Electronics Memory IC, PDIP-24
AT17F080-30JC - Microchip Technology Memory IC, LCC
AM27S35PC - Rochester Electronics Memory IC
AT17C512-10JC - Microchip Technology Memory IC, LCC
XC18V01SOG20C - XILINX Memory IC, SOIC-20
BD48E55G-TR - ROHM, SSOP5 (5-Pin, 2.90 × 2.80 × 1.25 mm)
MAX485EPA - Tudi RS-232/RS-485 Transceiver, DIP-8
ST78C36CQ64 - Rochester Electronics FPGA, PLCC-4
XR16L651IM - Rochester Electronics Interface IC
ST16C2450CJ44 - Rochester Electronics RS-232/RS-485 Transceiver
ST16C2450CQ48 - Rochester Electronics RS-232/RS-485 Transceiver, 48QFP
TL16C550BFN - Rochester Electronics Interface IC
TL16PC564BLVIPZ - Rochester Electronics, LQFP-100-14X14
ST16C2450IJ44 - Rochester Electronics RS-232/RS-485 Transceiver
CS82C5296 - Rochester Electronics RS-232/RS-485 Transceiver
Supply boundary
Product records help identify a manufacturer part number and technical family. A listed part may be fulfilled from Chip-seek warehouse-held stock or a reviewed sourcing channel. Source, quantity, packaging, date code, MOQ, price and lead time are confirmed before an order is accepted.
From the desk
Market signals, technical notes, and practical sourcing guidance for semiconductor procurement.
The same die, the same 48-pin footprint, twice the flash — and the firmware work most people forget before they swap.
Read article
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.
Read article
Seven channels, built-in clamp diodes, and a pinout that has not changed in forty years — what to check before you substitute one.
Read article
The 8 MB SPI flash behind a million embedded designs: package traps, firmware checks, and when 64 Mbit is still the right density.
Read article
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.
Read article
The three-terminal regulator on millions of boards: which parts really fit, and why the thermal math matters more than the pinout.
Read article
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.
Read article
The 48-pin Cortex-M3 that became an industry default: which alternatives really fit, and what breaks when you swap one in.
Read article