EN35SXR256A-104FIP(2PC)

The EN35SXR256A-104FIP(2PC) is a 256 Mbit serial NOR Flash memory from ESMT designed for industrial-temperature applications. It implements a serial SPI architecture supporting Single, Dual and Quad I/O, and provides uniform 4-Kbyte sectors with flexible program/erase and protection features for reliable non-volatile storage.

Built for firmware and data storage use cases that require controlled program/erase behavior and persistent data retention, the device targets systems that need high read throughput (up to 104 MHz / 133 MHz in Quad mode), hardware/software protection, and long-term endurance.

Key Features

• Memory Organization — 256 M-bit capacity (32,768 KByte) organized as 131,072 pages with 256 bytes per programmable page; uniform sector architecture with 8,192 × 4-Kbyte sectors, 1,024 × 32-Kbyte blocks and 512 × 64-Kbyte blocks.
• Serial SPI Interface — SPI-compatible operation (Mode 0 and Mode 3) with Standard, Dual and Quad SPI support; standard pins include CLK, CS#, DI, DO, WP# and HOLD#; Quad pins DQ0–DQ3 available for high-throughput access.
• Performance — Fast read support at 104 MHz for Single/Dual/Quad I/O Fast Read and up to 133 MHz for Quad I/O Fast Read to accelerate code and data fetch.
• Program / Erase Timing — Typical page program time 0.5 ms; typical sector erase ~40 ms; half-block ~200 ms; block ~300 ms; chip erase ~120 seconds.
• Power and Voltage — Single power supply operation with full voltage range 1.65–1.95 V and regulated operation 1.8–1.95 V; low power consumption with typical active current ~12 mA and typical power-down current ~1 µA.
• Reliability and Data Retention — Endurance minimum 100K program/erase cycles per sector/block and typical data retention of 20 years.
• Protection and Security — Software and hardware write protection (WP# pin), configurable protection of sectors/blocks, lockable 3 × 512-byte OTP security sector, Read Unique ID and Replay-Protected Monotonic Counter (RPMC).
• Addressing and Standards — Supports 3-byte and 4-byte address modes and Serial Flash Discoverable Parameters (SFDP) signature for automated device discovery.
• Package and Temperature — Available in 16-pin SOP 300 mil (surface-mount) package; rated for industrial temperature range (–40 °C to +85 °C).
• Compliance — All Pb-free packages compliant with RoHS and listed as halogen-free/REACH in the datasheet statement.

Typical Applications

• Embedded firmware and boot storage — Non-volatile storage for system code with sector-level protection and in-field update capability.
• Industrial control systems — Industrial temperature rating and robust endurance support firmware and configuration storage in harsh environments.
• Data logging and configuration — Uniform 4-Kbyte sector architecture and programmable pages allow managed updates of data segments without impacting protected code regions.
• Secure storage and identification — On-chip OTP sector, unique ID and RPMC provide basic device identity and replay-protection mechanisms for secure applications.

Unique Advantages

• Flexible SPI I/O modes — Standard, Dual and Quad SPI support enables designers to scale read throughput to match system bandwidth needs up to 133 MHz Quad I/O.
• Granular erase and protection — 4-Kbyte uniform sectors and block-level protection provide precise control over updates and reduce risk of accidental code modification.
• High endurance and long retention — Minimum 100K program/erase cycles and 20-year data retention help ensure long-term reliability for deployed systems.
• Low-power standby — Typical power-down current around 1 µA minimizes energy draw in low-activity or battery-assisted systems.
• Industrial-ready packaging — Available in 16-pin SOP 300 mil surface-mount package and specified for –40 °C to +85 °C operation for industrial deployment.
• Integrated security features — Lockable OTP and RPMC support basic secure storage and anti-replay capabilities without adding external components.

Why Choose EN35SXR256A-104FIP(2PC)?

Manufactured by ESMT, the EN35SXR256A-104FIP(2PC) positions itself as a reliable serial NOR Flash option for industrial-temperature systems that require robust firmware storage, secure ID features, and flexible SPI performance. Its combination of Quad I/O read speeds, uniform sector architecture, hardware/software protection, and long endurance makes it suitable for designs that need controlled update processes and persistent data retention.

The device is well-suited to engineers and buyers specifying non-volatile code and configuration storage where long-term reliability, low-power standby, and industrial temperature operation are key requirements. Its support for SFDP and 3/4-byte addressing simplifies integration across evolving system address spaces.

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