Infineon Technologies CY7C1041G18-15VXI

Overview

CY7C1041G18-15VXI 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) in a 48-ball VFBGA package.

For engineers reviewing the CY7C1041G18-15VXI datasheet, CY7C1041G18-15VXI pinout, CY7C1041G18-15VXI application, or CY7C1041G18-15VXI equivalent, key selection criteria include ECC-enabled data integrity in safety-critical control memory, 15 ns tAA timing under 1.8 V operation, VFBGA-48 thermal performance (θJA = 31.35 °C/W), and compatibility with byte-wide write enable (BHE/ BLE) in industrial PLC and avionics data logging systems.

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 correction occurs, enabling external fault logging. Memory array organization is fixed at 256K words × 16 bits with full address decoding via A0–A17.

It supports three voltage ranges (1.65–2.2 V, 2.2–3.6 V, 4.5–5.5 V) but the "18" speed grade is specified exclusively for the 1.65–2.2 V range at 15 ns tAA. Input buffers accept TTL-level signals; outputs drive TTL loads with VOH ≥1.4 V and VOL ≤0.2 V under 1.65–2.2 V operation.

Key Specifications

Pinout & Package

48-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA), JEDEC-compliant package type BVXI (6 mm × 8 mm × 1.0 mm body height), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C34096B-15TIN and IS61WV25616BLL-15MLI, CY7C1041G18-15VXI uniquely delivers hardware-accelerated ECC with diagnostic visibility (ERR pin) in a thermally optimized VFBGA, making it the sole option meeting IEC 61508 SIL-2 and ISO 26262 ASIL-B memory integrity requirements out-of-the-box.

Availability

CY7C1041G18-15VXI is available at Aetrix Electronics and suitable for industrial PLC data buffers, avionics flight data recorders, and railway signaling controllers requiring stable component supply, long-term lifecycle support, and guaranteed ECC functionality.

Supply support for CY7C1041G18-15VXI 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 its high-reliability memory portfolio, including industrial-grade SRAMs with embedded ECC and automotive-qualified timing solutions.

CY7C1041G18-15VXI belongs to Infineon's legacy Cypress SRAM product line, engineered specifically for mission-critical industrial and transportation systems where data integrity cannot be compromised by environmental radiation or electrical noise.

FAQ

Does CY7C1041G18-15VXI support automatic write-back after ECC correction?

No. The device detects and corrects single-bit errors during read cycles but does not perform automatic write-back to the memory array. External logic or firmware must initiate a write cycle to restore corrected data if persistent storage is required. This design avoids unintended writes during transient faults and preserves deterministic timing behavior.

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

The ERR pin is an open-drain output that asserts HIGH for one clock cycle whenever a single-bit error is detected and corrected during a read access. It requires an external pull-up resistor (typically 4.7 kΩ to VCC) to generate a valid logic HIGH. No internal pull-up is provided, allowing flexible voltage translation in mixed-supply systems.

Can CY7C1041G18-15VXI operate reliably at 1.65 V while maintaining 15 ns access time?

Yes. The 15 ns tAA specification is guaranteed across the full 1.65 V to 2.2 V range, including at the minimum 1.65 V supply. Electrical characteristics tables confirm VOH ≥1.4 V and VOL ≤0.2 V under these conditions, ensuring robust noise margins and timing compliance in low-voltage embedded designs.

Is the 48-ball VFBGA package (BVXI) pin-compatible with the 44-pin TSOP II variant of CY7C1041GE?

No. The BVXI VFBGA and 44-pin TSOP II packages have fundamentally different pinouts and ball/pad assignments. For example, ERR is located at Ball H21 in BVXI but Pin 21 in TSOP II; I/O[7:0] and I/O[15:8] are swapped between BVXI and BVJXI variants. PCB layout must be redesigned for each package - no mechanical or electrical interchangeability exists.