Infineon Technologies CY7C1041G-10ZSXIT

Overview

CY7C1041G-10ZSXIT from Infineon Technologies (formerly Cypress) is a 4-Mbit (256K × 16) CMOS static RAM with embedded single-bit error-correcting code (ECC), operating at 10 ns access time across 4.5–5.5 V supply, featuring TTL-compatible I/Os, ERR pin for error indication, and low 38 mA typical active current. It serves as a high-reliability memory buffer in industrial control systems requiring data integrity under radiation-prone or long-term operation conditions.

For engineers reviewing the CY7C1041G-10ZSXIT datasheet, CY7C1041G-10ZSXIT pinout, CY7C1041G-10ZSXIT application, or CY7C1041G-10ZSXIT equivalent, key selection criteria include ECC-enabled read reliability, 44-pin TSOP II package compatibility, 10 ns timing at 5 V, byte-level write enable via BHE/ BLE, and industrial-grade temperature support (–40°C to +85°C).

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-error status is signaled solely via the ERR output pin. The memory array uses standard row/column decoding with sense amplifiers and supports full 16-bit parallel access or byte-selectable writes using independent BHE (I/O8–I/O15) and BLE (I/O0–I/O7) controls.

All I/Os enter high-impedance state when CE is HIGH or when OE, BHE, and BLE are simultaneously deasserted-enabling clean bus sharing in multi-device systems. Data retention is guaranteed at 1.0 V down to –40°C, supporting low-power suspend modes without external backup power.

Key Specifications

Pinout & Package

Package: 44-pin TSOP II (Type II, 400 mil width), RoHS-compliant, JEDEC MO-141AC, body size 18.4 mm × 10.16 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C34096B-10TIN and IS61WV25616EDBLL-10MLI, CY7C1041G-10ZSXIT delivers immediate, hardware-asserted error visibility and eliminates software intervention-critical for real-time control loops and functional safety architectures where latency and determinism are non-negotiable.

Availability

CY7C1041G-10ZSXIT is available at Aetrix Electronics and suitable for industrial automation, railway signaling, and medical imaging equipment requiring stable component supply, long-lifecycle support, and guaranteed ECC functionality across temperature extremes.

Supply support for CY7C1041G-10ZSXIT 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, sensor solutions, and memory products for industrial, automotive, and IoT applications.

CY7C1041G-10ZSXIT belongs to Infineon's legacy Cypress SRAM portfolio, designed specifically for high-integrity embedded systems where data reliability supersedes raw speed-targeting applications with stringent uptime, safety, and field-deployment longevity requirements.

FAQ

Does CY7C1041G-10ZSXIT support automatic error correction write-back?

No. The device performs single-bit error correction during read cycles and asserts the ERR pin to indicate correction occurred, but it does not automatically rewrite the corrected data back to the memory array. System firmware must initiate any desired write-back operation using standard /WE-controlled writes.

What is the function of the NC pins in the 44-pin TSOP II package?

The NC (No Connect) pins-located at positions 21, 22, and 23 in the 44-pin TSOP II footprint-are physically present but not bonded to the silicon die. They serve no electrical function and must remain unconnected in PCB layout; routing traces or applying solder paste to these pads may cause mechanical stress or unintended coupling.

Can CY7C1041G-10ZSXIT operate reliably at 4.5 V with full 10 ns timing?

Yes. The datasheet specifies tAA = 10 ns across the entire 4.5 V to 5.5 V supply range, with ICC = 38 mA typical measured at VCC = 5 V and f = 100 MHz. At 4.5 V, timing remains compliant provided input rise/fall times meet AC test load conditions (≤1 V/ns) and board layout minimizes VCC droop during burst accesses.

How is the ERR pin electrically configured and what external components are required?

The ERR pin is an open-drain output requiring an external pull-up resistor to VCC. Typical value is 4.7 kΩ; this ensures logic HIGH (≥2.4 V) when inactive and fast LOW transition (<10 ns) during error events. No capacitor or filtering is recommended-ERR pulses reflect actual correction timing and must remain edge-sharp for diagnostic timestamping.