Infineon Technologies S29GL064N90BAI042

Overview

S29GL064N90BAI042 from Infineon Technologies (formerly Cypress) is a 64 Mbit (8 MB), 16-bit-wide single-supply MirrorBit Flash memory IC with 90 ns access time, organized as 4,194,304 words, and featuring uniform sector architecture (128 × 64 KB sectors). It operates from a single 3.0 V supply (2.7–3.6 V), supports JEDEC-compliant command set, and is used for firmware storage in industrial control systems, network boot loaders, and embedded BIOS applications.

For engineers reviewing the S29GL064N90BAI042 datasheet, S29GL064N90BAI042 pinout, S29GL064N90BAI042 application, or S29GL064N90BAI042 equivalent, key selection criteria include sector protection granularity (64 KB uniform sectors), Secured Silicon Sector with factory-programmed 128-word ESN, CFI compliance for host auto-configuration, and dual VIO/VCC voltage domain support (1.65–3.6 V on VIO).

Technical Context

This device implements a command-based, nonvolatile memory architecture using hot-electron injection for programming and hot-hole assisted erase. Its internal state machine handles all timing-critical operations-including sector erase, buffer write, and suspend/resume-without external microcontroller intervention.

The 110 nm MirrorBit process enables high-density NOR Flash with 100,000 erase cycles per sector and 20-year data retention. The flexible I/O interface uses VIO to define input thresholds and output drive levels, decoupling logic signaling from core VCC, enabling interoperability with mixed-voltage host systems.

Key Specifications

Pinout & Package

Package: 48-pin TSOP (Type I, standard thin small outline package), body size 12 mm × 20 mm, lead pitch 0.5 mm. Pinout conforms to JEDEC MO-141AC standard for 48-pin Flash devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR Flash memory applications.

Compared with S29GL064S90TFI020 and MX29GL640EHTI-90G, the S29GL064N90BAI042 uniquely delivers factory-programmed ESN, dual-voltage I/O, and password-protected sector locking - making it the only option among the three qualified for secure, mixed-voltage, long-lifecycle embedded designs.

Availability

S29GL064N90BAI042 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, network router boot loaders, and medical imaging system BIOS requiring stable component supply, long-term lifecycle support, and guaranteed obsolescence management.

Supply support for S29GL064N90BAI042 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 systems, sensors, and memory solutions for industrial, automotive, and IoT applications.

The S29GL-N family was originally developed by Cypress Semiconductor and continues under Infineon's Flash Memory portfolio, targeting high-reliability, code-execution-capable NOR Flash for mission-critical embedded boot and firmware storage.

FAQ

Is S29GL064N90BAI042 compatible with legacy Cypress S29GL064N designs?

Yes - this part retains identical electrical characteristics, pinout, command set, and timing specifications as the original Cypress S29GL064N90BAI042. Infineon maintains full backward compatibility, including identical AC/DC parameters, CFI query structure, and sector protection behavior. No PCB or firmware changes are required for drop-in replacement.

What is the function of the VIO pin, and can it be tied to VCC?

VIO sets input voltage thresholds and output drive strength for all address, control, and data signals. It must be supplied within 1.65–3.6 V and may be tied to VCC only if the host system uses matching I/O voltage (e.g., both at 3.3 V). For 1.8 V hosts, VIO must be independently regulated to 1.8 V to ensure valid logic levels and avoid bus contention or data corruption.

How does the Secured Silicon Sector differ from standard sector protection?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region programmed and locked at the factory or by the customer using a unique command sequence. Once locked, its contents - including an 8-word electronic serial number - cannot be erased or rewritten. Standard sector protection only disables program/erase commands but leaves sector contents modifiable if protection is lifted.

Does S29GL064N90BAI042 support byte-mode operation, and how is it enabled?

Yes - byte-mode operation is enabled by asserting BYTE# = low, which configures DQ0–DQ7 as an 8-bit data bus while DQ8–DQ15 become high-impedance. In this mode, A-1 is mapped to DQ15, allowing 8-bit hosts to access the full 8 MB address space using 22 address lines. All command sequences remain identical; only data transfer width changes.