Infineon Technologies S29JL064J55TFA003

Overview

S29JL064J55TFA003 from Infineon Technologies (formerly Cypress) is a 64-Mb, 3.0 V-only simultaneous read/write flash memory organized as 4,194,304 × 16-bit or 8,388,608 × 8-bit. It features zero-latency concurrent read/erase-program operations across four independent banks, 55 ns access time, and hardware sector protection. Used in embedded boot code storage for industrial controllers requiring nonvolatile firmware persistence with in-system reprogrammability.

For engineers reviewing the S29JL064J55TFA003 datasheet, S29JL064J55TFA003 pinout, S29JL064J55TFA003 application, or S29JL064J55TFA003 equivalent, key selection criteria include simultaneous bank operation capability, secured silicon region support, JEDEC CFI compliance, and dual-boot sector architecture for fail-safe firmware updates.

Technical Context

The device implements a four-bank architecture-two 8 Mb banks (with mixed 8 KB/64 KB sectors) and two 24 Mb banks (all 64 KB sectors)-enabling true background erase and program while reading from any non-busy bank. Bank grouping is software-configurable to match system partitioning needs.

It supports both byte (DQ7–DQ0) and word (DQ15–DQ0) data interfaces via BYTE# control, uses standard JEDEC single-power-supply command set, and integrates hardware features including RY/BY# status signaling, WP#/ACC pin for sector write protection and accelerated programming, and RESET# for state machine recovery.

Key Specifications

Pinout & Package

Package: 48-ball Fine-pitch BGA (VBK048 footprint). Pinout validated per Infineon Document 002-00856 Rev. *J, Figure 2 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29JL064J70TFI010 and S29JL032J55TFI010, the S29JL064J55TFA003 uniquely delivers 64 Mb density in 48-ball FBGA with 55 ns speed-enabling compact, high-performance boot memory for next-generation industrial and telecom edge devices requiring concurrent firmware update capability.

Availability

S29JL064J55TFA003 is available at Aetrix Electronics and suitable for industrial PLCs, automotive BCMs, medical diagnostic equipment, and telecom base stations requiring stable component supply, long-term lifecycle support, and guaranteed flash memory performance consistency.

Supply support for S29JL064J55TFA003 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 industrial, automotive, and IoT markets.

The S29JL064J belongs to Infineon's legacy Cypress flash memory product line, engineered for robust, in-system reprogrammable nonvolatile storage in mission-critical embedded systems demanding high endurance, secure boot, and deterministic timing behavior.

FAQ

What is the function of the WP#/ACC pin on S29JL064J55TFA003?

The WP#/ACC pin serves two distinct roles: as WP# it permanently protects boot sectors 0, 1, 140, and 141 from accidental program/erase regardless of software sector lock status; as ACC it activates accelerated programming mode, reducing typical word program time from 15 µs to 7 µs. The function is determined by voltage level and timing relative to command sequences, not by static configuration.

Does S29JL064J55TFA003 support true background erase?

Yes-it supports true background erase via Erase Suspend/Erase Resume functionality. When an erase operation is suspended, the device allows full read or program access to any non-erasing sector, then resumes the original erase upon command. This enables real-time servicing of host requests without interrupting long-duration erase cycles, confirmed in Section 8.4 and Figure 8-1 of the datasheet.

How is the Secured Silicon Region used in practice?

The 256-byte Secured Silicon Region can be factory locked (storing a verifiable 16-byte ESN) or customer locked (one-time programmable for unique identifiers or keys). Once locked, its contents are immutable and detectable via autoselect command. It is physically isolated from main array and accessed only through dedicated command sequences (Section 10.4), providing hardware-enforced security for device authentication.

Can S29JL064J55TFA003 operate in both 8-bit and 16-bit modes on the same PCB layout?

Yes-BYTE# pin selects bus width: asserted low enables 8-bit mode (DQ7–DQ0 active); deasserted high enables 16-bit mode (DQ15–DQ0 active). DQ15 functions as A-1 (LSB address) in byte mode, allowing shared pin usage. No hardware redesign is needed; mode selection is purely signal-level and supported across all valid VCC ranges per Section 8.1.