Infineon Technologies CY7C1041G18-15ZSXI

Overview

CY7C1041G18-15ZSXI from Infineon Technologies (formerly Cypress) is a 4-Mbit (256K × 16-bit) CMOS static RAM with embedded single-bit error-correcting code (ECC), designed for high-reliability industrial memory subsystems operating at 15 ns access time across 1.65–2.2 V supply. It features TTL-compatible I/O, ERR output for real-time ECC event indication, and low standby current (6 mA typical). Used in telecom line cards requiring data integrity under extended temperature cycling.

For engineers reviewing the CY7C1041G18-15ZSXI datasheet, CY7C1041G18-15ZSXI pinout, CY7C1041G18-15ZSXI application, or CY7C1041G18-15ZSXI equivalent, key selection criteria include ECC-enabled read reliability, 44-pin SOJ industrial-grade packaging, dual-voltage support (1.65–2.2 V), and ERR pin behavior during single-bit correction events.

Technical Context

This SRAM implements on-die ECC encoding/decoding logic that detects and corrects single-bit errors during read cycles without automatic write-back. The ERR pin asserts HIGH only when a correctable error is found and corrected - no assertion occurs on uncorrectable multi-bit errors.

It supports byte-level writes via independent BHE (I/O8–I/O15) and BLE (I/O0–I/O7) controls, and places all 16 I/O lines in high-impedance state when CE is HIGH or OE/BLE/BHE are deasserted. Address decoding covers A0–A17 (256K words), with no internal refresh or burst capability.

Key Specifications

Pinout & Package

Package: 44-pin SOJ (Small Outline J-Lead), JEDEC MS-024AC compliant, industrial temperature grade (–40 °C to +85 °C), Pb-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ECC SRAM applications.

Compared with IS61WV25616EDBLL-15BLI and AS6C4008-15TIN, CY7C1041G18-15ZSXI delivers integrated ECC correction with diagnostic visibility via ERR, operates at lower voltage (1.65–2.2 V), and supports true 16-bit word access - eliminating external logic or device stacking required by alternatives.

Availability

CY7C1041G18-15ZSXI is available at Aetrix Electronics and suitable for industrial PLC memory buffers, telecom line card data caches, railway signaling controllers, and medical imaging system frame buffers requiring stable component supply across extended temperature and voltage ranges.

Supply support for CY7C1041G18-15ZSXI 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, automotive ICs, and memory solutions formerly developed by Cypress Semiconductor.

CY7C1041G18-15ZSXI belongs to Infineon's industrial SRAM portfolio, engineered for mission-critical systems demanding data integrity, low-voltage operation, and long-term supply stability in harsh environments.

FAQ

Does CY7C1041G18-15ZSXI support automatic error correction write-back?

No. The device performs single-bit error correction during read cycles and asserts the ERR pin, but does not automatically rewrite the corrected data back to the memory array. External logic or firmware must handle write-back if persistent correction is required. This behavior is explicitly documented in Note 1 of the datasheet.

What is the function of the ERR pin, and how is it electrically driven?

The ERR pin is an open-drain output that goes HIGH during a read cycle when a single-bit error is detected and corrected. It requires an external pull-up resistor to VCC. The pin remains LOW during normal reads and uncorrectable errors, and does not indicate multi-bit failures - those result in undefined data output without ERR assertion.

Can CY7C1041G18-15ZSXI operate at 3.3 V?

No. This specific variant (suffix "18") is rated only for the 1.65–2.2 V supply range. Devices with "30" suffix (e.g., CY7C1041G30-10ZSXI) support 2.2–3.6 V operation. Using 3.3 V on CY7C1041G18-15ZSXI exceeds its absolute maximum rating and may cause functional failure or accelerated wear.

How does the 44-pin SOJ package differ from the 48-ball VFBGA for this part number?

CY7C1041G18-15ZSXI is specifically qualified in the 44-pin SOJ (ZSXI suffix) package. The 48-ball VFBGA variants use different ordering codes (e.g., BVXI, BVJXI) and have swapped I/O ball assignments. SOJ provides through-hole mounting compatibility and higher mechanical robustness in vibration-prone industrial environments, unlike surface-mount VFBGA.