GD25LQ64CSIGR

GD25LQ64CSIGR is GigaDevice’s 64-Mbit SPI serial NOR flash memory. It stores firmware and data for microcontrollers and embedded systems.
Key points:
- Capacity: 64 Mbit (8 Mbytes), organized with 3-byte addressing (suitable for 16 MB+ addressing limits).
- Interface: SPI-compatible; supports standard read and fast read, with optional dual/quad I/O modes on some variants.
- Voltage and density: typically 2.7–3.6 V operation.
- Performance: high-speed read (up to tens of MHz range depending on mode); standard page program and sector erase operations.
- Organization and size: 256-byte pages; erase sectors in 4 KB, 32 KB, and 64 KB; full-chip erase available.
- Features: Write Enable Latch, status register, busy flag, hardware write protection, deep power-down mode.
- Package: 8-pin small-outline (SOP/SOIC) in the SIGR/GR RoHS-compliant variant.
Common uses: bootloaders, firmware storage, code/data logging, and general non-volatile storage in microcontroller-based designs.
Note: specifics (timings, exact supported SPI modes) should be verified in the official datasheet.

Here are the key features of GD25LQ64CSIGR (64-Mbit serial flash):
- Capacity: 64 Mbit (8 MBytes) memory
- Interface: SPI-compatible serial flash
- Voltage: 2.7–3.6 V operation
- Speed: Fast Read up to ~104 MHz (high-speed SPI)
- Organization: 256-byte page size; supports standard page programming
- Erase and program: 4 KB sectors, 32 KB and 64 KB blocks, and Chip Erase
- Endurance/Retention: ~100,000 P/E cycles; data retention ~20 years (25°C)
- Low power: Sleep/Deep Power-Down mode for low current consumption
- Security: Hardware write protection (BP bits and WP#/HOLD# pins)
- Temperature: Industrial range (-40°C to +85°C)
- Packaging: 8-pin package (SOP/SOIC) with RoHS-compliant option
Useful for firmware storage, boot code, and code execution from flash.

An 8-pin SOP package (SOP-8 / SOIC-8), RoHS-compliant.

8 pins (SOP-8 / SOIC-8).
Function (per pinout typical for GD25LQ64CSIGR):
- CS# — Chip Select
- SCK — Serial Clock
- SI (DIN) — Serial Data In
- SO (DOUT) — Serial Data Out
- WP# — Write Protect
- HOLD# — Hold
- VCC — Power
- GND — Ground
Description: 64 Mbit serial Flash memory with SPI interface (and Quad/dual I/O options supported in some modes).

GD25LQ64CSIGR is manufactured by GigaDevice Semiconductor (Beijing) Co., Ltd. (GigaDevice or GD).
GigaDevice is a fabless semiconductor company based in Beijing, China, specializing in memory ICs, particularly SPI NOR flash and other flash memory products for various applications.

Applications of GD25LQ64CSIGR (64 Mbit serial flash):
- Firmware storage and boot code for microcontrollers/SoCs
- External program flash for firmware updates (SPI/QSPI)
- Data logging and configuration storage in IoT, industrial, and consumer electronics
- Bootstrapping and caching for embedded systems
- Automotive ECUs/infotainment (with appropriate grade variants)
- Networking equipment (routers, switches, gateways)
- Smart meters and energy-management devices
Note: suited for fast, nonvolatile storage in embedded applications.

Equivalent products (64 Mb SPI flash, SOIC-8, similar timing/voltage) include:
- Winbond W25Q64JV/W25Q64FV (3.3V SPI/QPI)
- Macronix MX25L64F/MX25L64G (3.3V, QPI)
- ISSI IS25LP064D (64 Mb SPI/QPI)
- Spansion S25FL064K/S25FL064P (64 Mb SPI)
Note: verify voltage, timing, and 4/8-byte addressing compatibility; use official cross-reference tables.