Infineon Technologies S29GL032N90FFIS43

Overview

S29GL032N90FFIS43 from Infineon Technologies (formerly Cypress) is a 32-Mbit, 16-bit-wide single-power-supply MirrorBit Flash memory organized as 2,097,152 words (4,194,304 bytes), featuring 90 ns access time, 25 ns page read time, and uniform sector architecture with sixty-four 32 Kword (64 KB) sectors. It operates from a single 3.0 V supply (2.7–3.6 V), supports JEDEC-compatible command sets, and is used for firmware storage in industrial control systems requiring reliable nonvolatile code retention.

For engineers reviewing the S29GL032N90FFIS43 datasheet, S29GL032N90FFIS43 pinout, S29GL032N90FFIS43 application, or S29GL032N90FFIS43 equivalent, key selection criteria include uniform sector erase capability, Secured Silicon Sector with factory-programmed 128-word ESN, CFI compliance for host auto-configuration, and hardware write protection via WP#/ACC input.

Technical Context

This device implements a synchronous command-set architecture with dedicated CE#, OE#, and WE# controls, enabling standard microprocessor bus interfacing without external logic. Its 110 nm MirrorBit process enables hot-hole assisted sector erase and hot-electron injection programming, delivering 100,000 erase cycles per sector and 20-year data retention.

The VersatileI/O™ interface uses VIO (1.65–3.6 V) to independently set input threshold and output drive levels, decoupling I/O voltage from core VCC. Hardware features include RY/BY# status signaling, RESET#-initiated operation abort, and WP#/ACC-enabled accelerated programming with first/last sector lock independent of software protection settings.

Key Specifications

Pinout & Package

Package: 48-pin TSOP (Type 1, standard thin small outline package, 12 × 20 mm body). Pinout validated per Cypress document 001-98525 Rev. *B, Figure 1 (S29GL032N Models 03/04).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL032N90FFIS43, the BGA variant trades TSOP serviceability for compactness, while the Macleod alternative sacrifices security and interoperability features to reduce bill-of-materials cost-neither offers drop-in replacement without layout or firmware changes.

Availability

S29GL032N90FFIS43 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, and automotive telematics modules requiring stable component supply across extended product lifecycles.

Supply support for S29GL032N90FFIS43 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 acquired Cypress Semiconductor in 2020 and maintains the MirrorBit Flash portfolio as part of its industrial and automotive memory solutions.

The S29GL-N series was designed specifically for high-reliability embedded firmware storage in harsh environments, emphasizing sector-level data integrity, secure identity, and long-term data retention over raw bandwidth.

FAQ

What is the function of the WP#/ACC pin on S29GL032N90FFIS43?

The WP#/ACC pin serves dual roles: when held low, it permanently protects the first or last sector from program/erase regardless of software protection settings; when driven high with elevated voltage (VHH), it activates accelerated programming mode, reducing write time by ~50% during manufacturing or field updates. This pin is electrically isolated from VCC and requires no external circuitry beyond standard level-shifting in mixed-voltage systems.

Does S29GL032N90FFIS43 support 8-bit data bus operation?

Yes, the device supports 8-bit mode when the BYTE# pin is asserted high, restricting data transfers to DQ0–DQ7 while maintaining full addressability. In this mode, the upper byte (DQ8–DQ15) is tri-stated, and internal logic maps each 8-bit access to the corresponding lower byte of the 16-bit word. This mode is fully compliant with JEDEC standards and requires no command changes-only hardware pin assertion.

How does the Secured Silicon Sector differ from standard flash sectors?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region that can be permanently locked at factory or by the customer using a command sequence. Once locked, no further writes or erases are possible-even with valid passwords or PPB unlocks. It contains an 8-word electronic serial number programmed during wafer test, providing cryptographically verifiable device identity essential for secure boot and anti-counterfeiting applications.

Can S29GL032N90FFIS43 be used with a 1.8 V microcontroller interface?

Yes, via the VersatileI/O™ feature: applying 1.8 V to the VIO pin configures all inputs (address, control, data) to recognize 1.8 V logic thresholds and drives outputs to 1.8 V levels, while VCC remains at 3.0 V for core operation. This eliminates level shifters in mixed-voltage designs and is validated across the full industrial temperature range per datasheet AC characteristics Table 15-1.