E28F004BVB80
| Parameters | |
|---|---|
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| RoHS Status | Not applicable |
| Package / Case | 40-TFSOP (0.724", 18.40mm Width) |
| Mfr | Intel |
| Mounting Type | Surface Mount |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Technology | FLASH - Boot Block |
| Supplier Device Package | 40-TSOP |
| Access Time | 80 ns |
| Memory Size | 4Mbit |
| Memory Type | Non-Volatile |
| Voltage - Supply | 4.75V ~ 5.25V |
| Memory Organization | 4M x 8 |
| Memory Format | FLASH |
| Memory Interface | CUI |
| Write Cycle Time - Word, Page | 80ns |
| Package | Bulk |
| Product Status | Active |
| REACH Status | Vendor Undefined |
| Standard Package | 2,000 |
| ECCN | EAR99 |
| HTSUS | 8542.32.0071 |
| Series | 28F004Bx |
E28F004BVB80 non-volatile flash memory chip 4Mbit CUI 80 ns
E28F004BVB80 is an obsolete Intel SmartVoltage boot block non-volatile flash memory chip with total 4-Mbit storage capacity, configurable as 512K×8 byte-wide mode or 256K×16 word-wide mode via the BYTE# control pin. The memory array adopts a segmented boot block layout optimized for embedded boot firmware storage, containing one hardware-lockable 16KB bottom boot block for core startup code protection against accidental erasure, two independent 8KB parameter blocks for frequently updated configuration data to replace discrete EEPROM chips, plus three large main data blocks (one 96KB, three 128KB) for storing application firmware, diagnostic logs and permanent device calibration values, with independent block erase functionality to avoid full-chip data loss during partial content rewriting.
Integrated hardware protection circuits including VPP lockout, RP reset and WP write-protect pins safeguard critical boot code, while low-power standby and deep power-down modes cut static current draw for battery-powered embedded hardware; it supports standard JEDEC flash command set for unified read, program, erase and status register polling, delivering reliable 100,000 block erase cycles and 20-year minimum data retention without external power supply.It widely deployed in legacy industrial controllers, vintage desktop/laptop PC BIOS motherboards, network router boot firmware modules, medical diagnostic equipment and automotive embedded ECU systems.
Alternative Flash Models
● TE28F004BVB80: Intel pin-compatible tray-packaged variant of E28F004BVB80 with identical 4Mbit boot block architecture, 80ns access time and dual voltage operation, designed for automated tray assembly of legacy motherboard repair batches.
● E28F400BVB80: Intel 4Mbit top-boot-block flash with identical electrical specs and speed, only differing in boot block address position for microcontrollers requiring high-address startup code storage.
● MX29F400TC-80G: Macronix mainstream parallel boot flash with 4Mbit density, 80ns access speed and 40-TSOP packaging, supporting single 3.3V operation as modern low-voltage substitute for old 5V Intel flash chips.
● SST39SF040-90-4C-NH: SST low-cost 4Mbit parallel flash with uniform sector erase and single 3.3V power supply, ideal simplified alternative for non-critical embedded firmware storage without dedicated hardware boot lock functions.
