A: The GD25LQ128EWIGR delivers high performance while consuming minimal power. The table below summarises its core specifications, drawn directly from manufacturer data and multiple distributor sources: Specification Value Memory Density 128 Mbit (16 Mbyte) Memory Organization 16M × 8 bits Memory Technology NOR Flash Memory Interface SPI, Dual I/O, Quad I/O, QPI Max Clock Frequency 120 MHz (SPI) Equivalent Quad I/O Rate Up to 480 Mbit/s (120 MHz × 4) Dual I/O Data Transfer Speed Up to 240 Mbit/s (120 MHz × 2) Supply Voltage (VCC) 1.65V to 2.0V (1.8V nominal) Active Read Current 20 mA (max) Standby Current (Idle) 35 μA (typical) Access Time 7 ns (max) Page Size 256 bytes Page Program Time (Tpp) 0.5 ms (max) / 60 μs Sector Erase Time (4KB) Not specified; 4KB sectors are supported Block Erase Time (32KB) 160 ms (max) Block Erase Time (64KB) Not specified Chip Erase Time Supported Write Endurance 100,000 program/erase cycles (minimum) Data Retention 20 years (minimum) Operating Temperature (Industrial) –40°C to +85°C (TA) Package Type 8‑pad WSON (5 × 6 mm) with exposed pad Moisture Sensitivity Level (MSL) 3 (168 hours) RoHS Status ROHS3 Compliant In addition, the device features: Hardware and software write protection: Configurable block protection via status register bits, a write enable latch, and a dedicated write protect (WP#) pin. Security registers with OTP (One‑Time Programmable) locks: For storing unique device identifiers or security keys. Suspend functionality: Allows the host to interrupt an erase or program operation to execute higher‑priority tasks. Hold functionality (HOLD# pin): Pauses an ongoing serial communication without resetting the instruction, allowing the SPI bus to be shared with other devices. Unique 64‑bit ID: For device traceability and anti‑counterfeiting. Absolute write protection: Enhanced security feature to prevent any write operation. QPI (Quad Peripheral Interface) mode: For reduced command overhead and improved throughput.

A: The device uses a standard 4‑wire Serial Peripheral Interface (SPI) bus for communication, operating in either SPI Mode 0 (CPOL=0, CPHA=0) or Mode 3 (CPOL=1, CPHA=1) for maximum compatibility with a wide range of microcontrollers and SoCs. The interface consists of the following signals: Signal Group Function CS (Chip Select) Enables the device when driven low SCLK (Serial Clock) Provides the clock signal for data transfer (up to 120 MHz) SI / IO0 Serial data input (I/O0 in Quad mode) SO / IO1 Serial data output (I/O1 in Quad mode) WP# / IO2 Hardware write protect pin (I/O2 in Quad mode) HOLD# / IO3 Pauses an ongoing serial communication without resetting the instruction (I/O3 in Quad mode) The device supports multiple flexible interface modes: Standard SPI (Single I/O): Uses separate SI (data in) and SO (data out) pins for 1‑bit transfers. Dual I/O (Dual SPI): The SI and SO pins become bidirectional I/O pins (IO0 and IO1) for 2‑bit per cycle transfers, effectively doubling the data rate to 240 Mbit/s. Quad I/O (Quad SPI): All four I/O pins (IO0, IO1, IO2, IO3) are used for simultaneous data transfer, achieving 4‑bit per cycle throughput — equivalent to an effective data rate of 480 Mbit/s when operating at 120 MHz. QPI (Quad Peripheral Interface): The entire operation (including instruction, address, and data) is performed in 4‑bit mode, further reducing command overhead and improving throughput. Communication is initiated by driving the Chip Select (CS) pin low. The host then sends an instruction byte, followed by address and data bytes, depending on the operation. The Continuous Read Mode allows efficient memory access, enabling true Execute‑In‑Place (XIP) operation where the host can execute code directly from the flash without copying it to RAM first.

A: The GD25LQ128EWIGR is engineered for long‑term reliability. Key specifications include: Reliability Parameter Specification Write Endurance 100,000 program/erase cycles per sector (minimum) Data Retention 20 years (minimum) Page Program Time 0.5 ms (max) / 60 μs Block Erase Time (32KB) 160 ms (max) Operating Temperature (Industrial) –40°C to +85°C Standby Current 35 μA (typical) These reliability figures meet industry‑standard requirements for NOR Flash technology. The device also includes hardware and software write protection features, a write enable latch (WEL) , and configurable block protection via status register bits, ensuring data integrity in mission‑critical systems. The uniform sector architecture (4KB sectors) allows for highly granular erase operations, minimising write amplification and extending effective device lifetime in data‑logging applications.

A: The GD25LQ128EWIGR is well‑suited for a wide range of embedded applications requiring reliable, high‑density code and data storage with a simple, low‑pin‑count interface and low‑voltage (1.8V) operation. Typical applications include: Battery‑powered and portable devices: Wearable electronics, smartwatches, fitness trackers, and hearables. Firmware storage and Bootloader: Boot code, system firmware, and application code in embedded systems, supporting IAP (In‑Application Programming) and OTA (Over‑The‑Air) upgrades. Execute‑In‑Place (XIP) operation: Direct code execution from Quad SPI flash without copying to RAM, reducing system memory requirements. Industrial control systems: PLCs, HMIs, data loggers, and factory automation equipment. Internet of Things (IoT) devices: Wi‑Fi modules, Bluetooth modules, smart home controllers, and sensor nodes. Consumer electronics: Smart TVs, set‑top boxes, digital cameras, gaming consoles, and smart speakers. Medical devices: Diagnostic equipment, patient monitors, and portable instruments. ⚠️ Important Lifecycle Information: The product lifecycle status for the GD25LQ128EWIGR is Active, with ongoing mass production according to GigaDevice and multiple distributor sources: GigaDevice’s official product page lists the Status as MP (Mass Production), confirming active manufacturing. DigiKey lists the Part Status as Active. JLC Semiconductor lists thousands of units in stock (3,927 units as of May 2025), with lead times as short as 4 hours for immediate delivery. Shenzhen Dazi reports significant inventory (950 units). Availability Notes: DigiKey currently reports zero stock and cannot accept backorders due to temporary constrained supply. However, other distributors such as JLC Semiconductor and Shenzhen Dazi have thousands of units in stock and are actively shipping. The device is available in Tape & Reel (TR) packaging with a standard manufacturer package quantity of 3,000 units per reel. Replacement / Alternative Options: For projects requiring long‑term supply assurance or needing to source from different channels, the following compatible alternatives are recommended: Alternative Part Manufacturer Package Notes GD25LQ128ESIGR GigaDevice SOP‑8 208mil Pin‑compatible, same 1.8V 128Mbit SPI NOR Flash, active production GD25LQ128ELIGR GigaDevice USON8 4×4mm Same 1.8V 128Mbit, active production W25Q128JWSIQ Winbond SOIC‑8 208mil 1.8V 128Mbit SPI NOR Flash, popular alternative, active production MX25L12835FZ2I-10G Macronix WSON‑8 8×6mm 3V device, not pin‑compatible but same density and package, active production Given the high availability and active production status of the GD25LQ128EWIGR, it remains a suitable choice for new designs. However, engineers are advised to verify current inventory levels and lead times directly with an authorised GigaDevice distributor (such as JLC Semiconductor, DigiKey, Mouser, or LCSC) before committing the part to a high‑volume production run, especially given the temporary supply constraints noted by DigiKey.