GD25LQ40EEIGR

GD25LQ40EEIGR is GigaDevice’s 4‑Mbit serial flash memory in an 8‑pin package. It stores firmware or data for embedded systems and is accessed over an SPI interface, with optional Quad I/O for higher throughput. The “IGR” suffix indicates an industrial temperature grade and RoHS-compliant packaging.
Key features (typical): standard SPI read/write/erase commands, fast read, page programming (usually 256 bytes), sector/block erase options, and deep power‑down with resume. It supports higher‑speed Quad I/O reads for faster data transfer and provides hardware write protection. Operating voltage and exact timing depend on the specific variant, but industrial‑grade parts are designed for robust operation in harsher environments.
Typical uses: boot code storage for microcontrollers, firmware updates, and data storage in embedded applications where a small, non‑volatile memory is required.
For precise electrical specs, available interfaces, timings, and packaging details, consult the GD25LQ40E/GD25LQ40EE datasheet and the IGR packaging spec.

GD25LQ40EEIGR is a 4 Mbit serial flash memory from GigaDevice. Key features:
- Capacity: 4 Mbit (512 KB)
- Interface: Serial SPI with Dual/Quad I/O read support
- Voltage: 2.7–3.6 V operation
- Addressing: 24-bit address
- Page size: 256 bytes; Page program
- Erase: 4 KB sectors, 64 KB blocks, and chip erase
- Speeds: High-speed read modes; Quad IO reads for higher throughput
- Features: Deep power-down, WP#/HOLD# pins, basic security features with block protection
- Endurance/Retention: ~100k P/E cycles; data retention >20 years
- Temperature: Industrial range (-40°C to 85°C)
- Packaging: 8-pin GR (SOP-8)
Ideal for code/data storage in embedded systems requiring small footprint, low voltage, and basic security/protection.

8-pin SOP (SOIC) package; RoHS-compliant (lead-free).

- Pin count: 8 pins (SOP8/SOIC8 package).
- Function: SPI serial flash memory (non-volatile storage). Pins typically: 1 CS, 2 DO (MISO), 3 WP, 4 GND, 5 DI (MOSI), 6 CLK, 7 HOLD, 8 VCC.

- Manufacturer: GigaDevice Semiconductor Inc. (GigaDevice)
- What kind of company: A semiconductor company specializing in non-volatile memory products, notably serial NOR/NAND flash memory and related IC solutions.

Applications for GD25LQ40EEIGR (4M-bit SPI flash):
- MCU boot flash and firmware storage in embedded systems
- Firmware updates/storage for consumer electronics, IoT, and industrial equipment
- Code/data memory for wearables and portable devices
- Data logging memory in industrial controllers, meters, and networking gear
- Compact automotive ECU firmware memory for small-scale systems

Equivalent 4 Mbit 3V3 SPI NOR Flash devices to GD25LQ40EEIGR include:
- Winbond W25Q40BV/BV(E)
- Macronix MX25LQ040 (MX25LQ040/MX25LQ040E)
- Everspin/EC EN25Q40B
- Spansion (Cypress) S25FL040
- ISSI IS25LP040D
- Microchip/Atmel AT25DF040A
Note: pinout and timing vary by vendor; verify exact package and timing before substitution.