Alternatives to onsemi CAT34C02HU4IGT4
onsemi CAT34C02HU4IGT4 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
Equivalent and substitute parts for onsemi CAT34C02HU4IGT4
 CAT34C02HU4IGT4onsemi |  CAT34C02HU4IGT4Aonsemi |  AT34C02D-MAHM-TMicrochip Technology | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Identical 8-pin UDFN footprint and pinout assignments. The exposed thermal pad configuration is completely identical.Exactly identical package size (2x3 mm) and mechanical profile height.Matches or exceeds all electrical and memory specifications, including the 1.7V to 5.5V supply and 400 kHz clock speed. | Pinout is completely identical (1:A0, 2:A1, 3:A2, 4:GND, 5:SDA, 6:SCL, 7:WP, 8:VCC) with a matching 2x3 mm 8-UDFN footprint.Matches the package dimensions, profile, and surface mount style of the original.Drop-in functionally equivalent EEPROM with a higher maximum clock speed. | ||
 AI Summary | CAT34C02HU4IGT4 by onsemi: EEPROM Memory IC 2Kbit I2C 400 kHz 900 ns 8-UDFN-EP (2x3). | The CAT34C02HU4IGT4A is the active, direct successor from onsemi designed as a drop-in replacement for the obsolete CAT34C02HU4I-GT4. It maintains identical electrical parameters, memory organization, physical packaging, and pinout, ensuring seamless compatibility.
| This Microchip alternative is an excellent active second-source option. It matches the original's 1.7V lower voltage limit and physical footprint while offering a performance upgrade with support for up to 1 MHz I2C bus speeds.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 AT24C02BN-SH-TMicrochip Technology | Non-stock | Obsolete | 5Alternatives availableSee Alternatives |
| CAT24C32onsemi | Non-stock | Active | 8Alternatives availableSee Alternatives |
 AT24C1024BW-SH25-TMicrochip Technology | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 MC34072DGonsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi CAT34C02HU4IGT4 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the onsemi CAT34C02HU4IGT4 are the CAT34C02HU4IGT4A (onsemi) and the AT34C02D-MAHM-T (Microchip Technology), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the CAT34C02HU4IGT4 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The CAT34C02HU4IGT4 (onsemi) is a part in the Memory category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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