Alternatives to Microchip Technology AT28C64B-15PU
Microchip Technology AT28C64B-15PU and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 AT28C64B-15PUMicrochip Technology |  AT28C256-15PUMicrochip Technology | CAT28C64BLI-15onsemi | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Pins 1 and 26 are mapped to address lines A14 and A13 respectively, whereas the original part leaves these pins as No Connect (NC).Identical 28-PDIP through-hole package dimensions (0.600" width).Fully meets and exceeds original electrical performance with larger memory density. | Perfect JEDEC-standard pin-for-pin compatibility.Identical 28-PDIP through-hole form factor.Matches all functional specifications, memory organization (8K x 8), and voltage requirements. | ||
 AI Summary | AT28C64B-15PU by Microchip Technology: EEPROM Memory IC 64Kbit Parallel 150 ns 28-PDIP. | The AT28C256-15PU is an active, higher-density sibling variant from Microchip in the same 28-DIP package. It is functionally compatible but requires pins 1 and 26 (which are NC on the original part) to be handled appropriately (e.g., tied to ground) if they are not already connected to the address bus.
| The CAT28C64BLI-15 is a direct second-source drop-in replacement from onsemi. It shares the identical JEDEC byte-wide pinout, 5V supply requirement, and 150 ns access speed, making it an excellent alternative with no layout modifications.
| |
| Lifecycle Status | Active | Active | Unknown | |
| Market Availability | In stock | In stock | Unknown | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
| Description | EEPROM Memory IC 64Kbit Parallel 150 ns 28-PDIP | EEPROM Memory IC 256Kbit Parallel 150 ns 28-PDIP | The CAT28C64BLI-15 is a direct second-source drop-in replacement from onsemi. It shares the identical JEDEC byte-wide pinout, 5V supply requ | |
| Manufacturer | Microchip Technology | Microchip Technology | onsemi | |
| Type | Memory | Memory | Component | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 8 weeks | 7 weeks | Unknown | |
| Country of Origin | PH, US, TH | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.32.0051 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Technology | EEPROM | - | - | |
| Access Time | 150 ns | - | - | |
| Memory Size | 64Kbit | - | - | |
| Memory Type | Non-Volatile | - | - | |
| Memory Format | EEPROM | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | 28-DIP (0.600", 15.24mm) | - | - | |
| Memory Interface | Parallel | - | - |
Unlock all 4 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
You searched one part. Parter watches your whole BOM.
All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.
Frequently asked questions
Yes. The Microchip Technology AT28C64B-15PU is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the Microchip Technology AT28C64B-15PU are the AT28C256-15PU (Microchip Technology) and the CAT28C64BLI-15 (onsemi), 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 AT28C64B-15PU 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 AT28C64B-15PU (Microchip Technology) is a part in the Memory category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
Schedule a demo
See Parter in action
Discover how Parter can help your hardware team:
- Streamline your hardware operations with AI
- Detect and prevent lifecycle disruptions
- Accelerate product development
- Stay compliant and production-ready