Infineon Technologies S29GL032N90BFI042

Overview

S29GL032N90BFI042 from Infineon Technologies (formerly Cypress) is a 32-Mbit, 16-bit wide single-power-supply MirrorBit Flash memory IC with 90 ns access time, organized as 2,097,152 words (4,194,304 bytes), supporting uniform sector architecture (64 × 64 KB sectors), and operating at 2.7–3.6 V VCC and 1.65–3.6 V VIO. It is used for boot code storage and firmware updates in industrial control systems requiring nonvolatile, field-programmable memory with hardware write protection.

For engineers reviewing the S29GL032N90BFI042 datasheet, S29GL032N90BFI042 pinout, S29GL032N90BFI042 application, or S29GL032N90BFI042 equivalent, key selection criteria include JEDEC-compliant command set, Secured Silicon Sector with factory-programmed 128-word ESN, Erase Suspend/Resume capability, and support for both page read (25 ns) and buffered write (16-word buffer) operations.

Technical Context

This device implements a NOR-type Flash architecture with hot-electron injection programming and hot-hole assisted erase, enabling sector-level erasure without affecting adjacent sectors. It features dual voltage inputs (VCC for core logic and VIO for I/O level setting), allowing interface compatibility with 1.8 V, 2.5 V, or 3.3 V host systems via the VIO pin.

The command-set architecture supports CFI (Common Flash Interface) for automatic device identification, Unlock Bypass mode to reduce multi-word programming overhead, and persistent sector protection via lock bits-eliminating reliance on external 12 V programming voltages. RESET# and RY/BY# pins provide hardware reset and real-time operation status feedback.

Key Specifications

Pinout & Package

Package: 48-pin TSOP (Type I, standard thin small outline package), 12 × 20 mm body, 0.5 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Flash memory applications.

Compared with S29GL032N90BFI042, the BGA variant trades speed and hardware security for compactness, while the Macleod alternative sacrifices secure silicon and CFI flexibility for lower unit cost-making the original optimal for secure, timing-critical industrial boot memory.

Availability

S29GL032N90BFI042 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster boot memory, and medical diagnostic equipment BIOS requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.

Supply support for S29GL032N90BFI042 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and IoT markets.

This device belongs to Infineon's MirrorBit Flash memory product line, designed specifically for reliable, secure, and high-performance nonvolatile code storage in mission-critical embedded systems where data integrity and long-term endurance are mandatory.

FAQ

What is the function of the WP#/ACC pin on S29GL032N90BFI042?

The WP#/ACC pin serves two distinct roles: as WP# (Write Protect), it permanently locks the first or last sector against accidental erase or program when pulled low; as ACC (Accelerated Program), it accepts 5.0 V to reduce programming time during high-throughput manufacturing. The function is determined by voltage level and timing-no external configuration register is required.

Does S29GL032N90BFI042 support byte-wide data access?

Yes, it supports 8-bit data access via the BYTE# input pin. When BYTE# is driven LOW, the device operates in x8 mode, presenting DQ0–DQ7 as the data bus while DQ8–DQ15 are tri-stated. This mode is fully compatible with 8-bit microcontrollers and requires no changes to command sequences or timing parameters.

How is the Secured Silicon Sector programmed and locked?

The Secured Silicon Sector is pre-programmed at the factory with a unique 8-word (16-byte) Electronic Serial Number and can be customer-locked using the Persistent Sector Protection command sequence. Once locked via PPB (Persistent Protection Bit), the sector becomes permanently read-only-even under accelerated programming voltage-and cannot be erased or rewritten.

Can S29GL032N90BFI042 be used in systems with 1.8 V I/O interfaces?

Yes, provided VIO is supplied at 1.8 V (within 1.65–3.6 V range) and all control/data signals meet VIH/VIL thresholds at that level. The device's VersatileI/O™ architecture ensures correct interpretation of address, command, and data signals independent of VCC, enabling seamless integration with 1.8 V FPGAs and microcontrollers without level shifters.