GD25Q40CEJGR

Memory IC Overview

The GD25Q40CEJGR is a 4M-bit (512K x 8) NOR flash memory device manufactured by GigaDevice. It operates on a single 3.3V power supply with a voltage range of 2.7V to 3.6V. The component supports Standard, Dual, and Quad SPI interfaces, achieving clock frequencies up to 120MHz for fast read operations. It features uniform sector architecture with 4KB sectors and 32/64KB blocks. The device includes hardware write protection, security registers, and a unique ID. It is housed in an 8-lead USON package measuring 3x2mm with a thickness of 0.45mm, suitable for industrial temperature ranges from -40°C to +105°C.

Memory IC Feature Summary

• Supports Standard, Dual, and Quad Serial Peripheral Interface (SPI) modes for flexible data transfer rates.
• Features uniform sector architecture allowing independent erasure of 4KB sectors and 32/64KB blocks.
• Includes advanced security mechanisms such as software/hardware write protection and one-time programmable security registers.
• Provides a 128-bit unique identifier for each device to ensure traceability and authentication.

Memory IC Applications

• Code storage for microcontrollers and system-on-chips requiring execute-in-place capability.
• Data logging and configuration storage in industrial control systems.
• Firmware storage in consumer electronics and IoT devices.
• Parameter storage in automotive electronic control units.

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the Quad Enable bit configuration aligns with the host controller's pin definitions, particularly regarding WP# and HOLD# functionality when Quad mode is active. Ensure the design accounts for the moisture sensitivity level and reflow soldering profile specified for the USON8 package to prevent damage during assembly.

Memory IC Selection Notes

Select this component when a compact footprint is required alongside high-speed read performance. It is suitable for designs needing robust data protection features without external components. Consider the industrial temperature range if the application operates in harsh environments. Verify that the host system supports the necessary SPI modes and command sets for optimal throughput.

Memory IC Part Context

This part belongs to the GD25Q40C series of 3.3V uniform sector dual and quad serial flash memories. The series is designed for applications demanding high reliability and low power consumption. It complements other densities in the GigaDevice portfolio, offering a balance of capacity and speed in a small form factor.

Memory IC Replacement Considerations

Check datasheets for other GD25Q40 variants with different packages or temperature ratings. Ensure functional compatibility regarding command sets and pin configurations before substitution.

Memory IC FAQ

How does the Quad Enable (QE) bit affect the WP# and HOLD# pins?

When the QE bit is set to 1, the WP# and HOLD# pins function as dedicated data I/O pins (IO2 and IO3). When QE is 0, these pins retain their original write protect and hold functions.

What is the purpose of the High Performance Mode (HPM)?

High Performance Mode allows the device to operate at higher clock frequencies for read operations, improving data throughput beyond standard specifications.