GD25Q40CSIGR

Memory IC Overview

The GD25Q40CSIGR is a 4M-bit (512K x 8) NOR flash memory manufactured by GigaDevice. It operates on a single 3.3V power supply within a voltage range of 2.7V to 3.6V. The device supports Standard, Dual, and Quad SPI interfaces with a maximum clock frequency of 120MHz for fast read operations. It features uniform sector architecture with 4KB sectors and 32/64KB blocks. The component is housed in an SOP-8 package and is rated for industrial operating temperatures ranging from -40°C to +85°C.

Memory IC Feature Summary

• Supports standard, dual, and quad serial peripheral interface protocols for flexible data transfer rates.
• Includes hardware and software write protection mechanisms with block protect bits and status register locking.
• Features advanced security capabilities including a unique ID and programmable security registers with one-time programmable locks.

Memory IC Applications

• Code storage for microcontrollers and embedded systems
• BIOS and firmware storage in consumer electronics
• Parameter storage in industrial control devices

Memory IC Procurement Notes

Verify the specific suffix 'SIGR' corresponds to the SOP-8 208mil package and tape-and-reel packaging configuration. Confirm that the industrial temperature grade (-40°C to +85°C) matches the design requirements. Ensure compatibility with the required SPI command set and voltage levels before integration.

Memory IC Selection Notes

Select this component when a 4M-bit density is required with support for high-speed Quad I/O operations. It is suitable for designs needing uniform sector erase capabilities and robust data protection features. Consider the SOP-8 package constraints and industrial temperature range during PCB layout and thermal management planning.

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 requiring reliable non-volatile storage with high performance. The GD25Q40C variant specifically offers 4M-bit capacity with standardized SPI commands and enhanced security features.

Memory IC Replacement Considerations

GD25Q40CTIGR

Memory IC FAQ

What is the difference between Dual SPI and Quad SPI modes?

Dual SPI uses two I/O lines (IO0 and IO1) for data transfer, doubling the speed compared to standard SPI. Quad SPI utilizes four I/O lines (IO0-IO3), quadrupling the data throughput rate.

How is the Quad Enable bit configured?

The Quad Enable (QE) bit is located in the Status Register. It must be set to 1 via the Write Status Register command to enable Quad SPI operations. When QE is 0, the WP# and HOLD# pins function as dedicated control signals.