ProjectsPricingInsights

Best Alternatives to AT32F421C8T7

Package: LQFP-48ARTERYMicrocontrollersInfrared Data Association: -CCP Capture/Compare: -Program Storage Size: 64KBcommunication protocol: -Operating Voltage Range: -

AT32F421C8T7 has no confirmed drop-in replacement in the provided catalog data. Same-package MCU options require FAE review for pinout, firmware and temperature grade.

AI replacement insight

Electrical riskhigh

Voltage, temp and RAM differ on several options.

Package riskmedium

LQFP-48 matches, but pinout is unknown.

Firmware riskhigh

Core, clock and peripherals can change.

Sourcing riskmedium

Lifecycle data is mixed or missing.

Can it be replaced directly?

No confirmed pin-compatible replacement is supported by the provided fields.

Best replacement path

Start with same-package candidates, then verify pinout and firmware before layout use.

Main risk

Pinout and firmware compatibility are not proven.

Recommended alternatives

4
CH32V203C8T6 package
CH32V203C8T6

WCH

Needs validationhigh risk

CH32V203C8T6 matches LQFP-48 and voltage but needs RISC-V firmware and pinout review.

View details

Alternative comparison matrix

Feature / factorAT32F421C8T7CH32V203C8T6APM32F103C8T6GD32F330C8T6Compatibility / risk
PackageLQFP-48LQFP-48LQFP-48LQFP-48LQFP-48 — same package; APM32F103C8T6: same package; GD32F330C8T6: same package; APM32F072CBT6: same package
Pinout48-pin mapnot providednot providednot providednot provided — no pin map; APM32F103C8T6: no pin map; GD32F330C8T6: no pin map; APM32F072CBT6: no pin map
Voltage2.4-3.6V2.4-3.6V2.0-3.6V2.6-3.6V2.4-3.6V / 2.0-3.6V / 2.6-3.6V — range matches; APM32F103C8T6: wider low end; GD32F330C8T6: higher Vmin; APM32F072CBT6: wider low end
Temperature-40 to 105C-40 to 85Cmissingmissing-40 to 85C / missing — lower max temp; APM32F103C8T6: not listed; GD32F330C8T6: not listed; APM32F072CBT6: not listed
InterfaceARM M4 firmwareRISC-VARM M3 96MHz-RISC-V / ARM M3 96MHz — port needed; APM32F103C8T6: code changes
ApplicationM4 120MHz 16KB--M4 84MHz 8KBM4 84MHz 8KB / M0+ 48MHz — less headroom; APM32F072CBT6: large downgrade

Application & sourcing insights

Questions & answers

No direct best replacement is confirmed. CH32V203C8T6 and APM32F103C8T6 are review candidates, not drop-ins.