GD25B256EFIRR

GD25B256EFIRR is a 256-Mbit serial flash memory from GigaDevice. It provides non-volatile storage for firmware, configs, and data in embedded systems.
Key points:
- Density and organization: 256 Mbit (32 MB) total.
- Interface: SPI serial interface with standard and fast read commands.
- Memory structure: 256-byte page size; erase options include 4 KB sectors, and 32 KB/64 KB blocks; full-chip erase available.
- Endurance and protection: typical write/erase cycles per sector; sector-level write protection via hardware pins; WP/HOLD pins for protection and utility.
- Power and range: operates at 2.7–3.6 V; includes deep power-down for low power consumption.
- Packaging: 8-pin package; “IRR” indicates Tape & Reel packaging.
- Applications: firmware storage and updates, boot ROM, code/data storage, and data logging.
For exact timing, voltage, temperature range, and pinout, consult the GD25B256EFI(RR) datasheet.

GD25B256EFIRR is a 256‑Kbit SPI NOR flash. Equivalent parts from other vendors (pin-compatible SPI NOR 256Kbit) include: Winbond W25B256, Macronix MX25B256, and ISSI IS25LP256. Verify exact cross-reference by matching JEDEC ID, supply voltage (e.g., 2.7–3.6V), clock/timing specs, and package. If needed, use the vendor cross-reference tables for precise part numbers.

Here are the typical features of GD25B256EFIRR (256-Mbit SPI serial flash):
- Density: 256 Mbit (32 MB) serial Flash memory
- Interface: SPI-compatible (SCK, SI, SO, CS); standard SPI (no Quad/SPI-Dual required)
- Memory organization: 256-byte pages; 4 KB sectors; 64 KB blocks; chip erase option
- Performance: Fast Read up to about 104 MHz
- Program/Erase: Page program (256 bytes); erase by sector/block/chip
- Endurance/Retention: ~100k P/E cycles; data retention typically ≥20 years
- Operating voltage: 2.7 V to 3.6 V
- Temperature: Industrial range (e.g., -40 °C to +85 °C)
- Power: Deep power-down mode; low standby current
- Security: Write protection features and status registers
- Package: 8-pin, RoHS-compliant (suffix indicates package type)

- Pin count: 8 pins (8‑pin package, e.g., SOP8/SOIC8)
- Function: 256‑Mbit serial SPI flash memory used for non-volatile storage (firmware/data). Provides standard SPI reads/writes, page program, sector/block/chip erase, with 24-bit addressing.

- Manufacturer: GigaDevice Semiconductor Co., Ltd. (GigaDevice)
- Company type: A Chinese semiconductor company that designs and markets memory and microcontroller ICs (SPI/NOR flash and MCUs); it is generally described as a fabless design house that outsources fabrication to foundries.

Typical application areas for GD25B256EFIRR (SPI flash):
- Firmware storage and boot memory for microcontrollers
- OTA updates and firmware image storage
- Data logging, buffering and non-volatile storage in IoT devices, sensors, wearables
- External memory for automotive ECUs and industrial controllers
- Networking equipment and consumer electronics (routers, set-top boxes, printers) for firmware, configs, and logs
- General embedded storage for cameras, meters, smart devices, POS terminals
These areas leverage high-density, non-volatile serial flash for code and data storage.

8-pin SOP (SOIC) package.