GENERAL DESCRIPTION
The IS25LQ025/512/010/020/040B (256K/512K/1M/2M/4Mbit) Serial Flash memory offers a storage solution with flexibility and performance in a simplified pin count package. ISSI’s “Industry Standard Serial Interface” is for systems that have limited space, pins, and power. The IS25LQ025/512/010/020/040B is accessed through a 4-wire SPI Interface consisting of a Serial Data Input (SI), Serial Data Output (SO), Serial Clock (SCK), and Chip Enable (CE#) pins, which also serve as multi-function I/O pins in Dual and Quad modes (see pin descriptions). The IS25xQ series of Flash is ideal for code shadowing to RAM, execute in place (XIP) operations, and storing non-volatile data.

FEATURES
• Industry Standard Serial Interface
   - IS25LQ040B: 4Mbit/ 512Kbyte
   - IS25LQ020B: 2Mbit/ 256Kbyte
   - IS25LQ010B: 1Mbit/ 128Kbyte
   - IS25LQ512B: 512Kbit/ 64Kbyte
   - IS25LQ025B: 256Kbit/ 32Kbyte
   - 256-bytes per Programmable Page Standard
   - Standard SPI/Dual/Quad Multi-I/O SPI
   - Supports Serial Flash Discoverable Parameters
      (SFDP)
• High Performance Serial Flash (SPI)
   - 104 MHz SPI/Dual/Quad Multi-I/O SPI
   - 416 MHz equivalent Quad SPI
   - 52MB/S Continuous Data Throughput
   - Supports SPI Modes 0 and 3
   - More than 100,000 erase/program cycles
   - More than 20-year data retention
• Efficient Read and Program modes
   - Low Instruction Overhead Operations
   - Continuous data read with Byte Wrap around
   - Allows XIP operations (execute in place)
   - Outperforms X16 Parallel Flash
• Flexible & Cost Efficient Memory Architecture
   - Uniform 4Kbyte Sectors or 32/64Kbyte Blocks
   - Flexible 4, 32, 64Kbyte, or Chip Erase
   - Standard Page Program 1 to 256 bytes
   - Program/Erase Suspend and Resume
• Low Power with Wide Temp. Ranges
   - Single 2.3V to 3.6V Voltage Supply
   - 10 mA Active Read Current
   - 8 µA Standby Current
   - Deep Power Down
   - Temp Grades:
      Extended: -40°C to +105°C
      V Grade: -40°C to +125°C
      Auto Grade: -40°C to +125°C
• Advanced Security Protection
   - Software and Hardware Write Protection
   - 4x256-Byte dedicated security area with
      user-lockable bits, (OTP) One Time
      Programmable Memory
   - 128 bit Unique ID for each device
• Industry Standard Pin-out & Pb-Free Packages1
   - JB = 8-pin SOIC 208mil
   - JN = 8-pin SOIC 150mil
   - JD = 8-pin TSSOP 150mil
   - JV = 8-pin VVSOP 150mil
   - JK = 8-contact WSON 6x5mm
   - JU = 8-contact USON 2x3mm
   - KGD (call factory)
   Note1: IS25LQ040B (not available in JD)