Infineon Technologies CY621472G30-45ZSXI

Overview

CY621472G30-45ZSXI from Infineon Technologies (formerly Cypress) is a 4-Mbit MoBL® SRAM with embedded single-bit error-correcting code (ECC), organized as 256K × 16, operating at 45 ns access time across 2.2 V–3.6 V supply. It features dual chip enables (CE1/CE2), byte-level write control (BHE/BLE), TTL-compatible I/Os, and an ERR output for real-time ECC event indication. Used in industrial embedded controllers requiring data integrity under voltage fluctuation or radiation-prone environments.

For engineers reviewing the CY621472G30-45ZSXI datasheet, CY621472G30-45ZSXI pinout, CY621472G30-45ZSXI application, or CY621472G30-45ZSXI equivalent, this page delivers verified package mapping (44-pin TSOP II), ECC functional behavior, dual CE timing constraints, standby current specs (≤8.7 µA), and direct substitution guidance against functionally matched SRAMs with ECC support.

Technical Context

This SRAM implements a synchronous, address-decoded memory array with integrated ECC encoder/decoder logic that detects and corrects single-bit errors on every read cycle without automatic write-back. The dual CE architecture requires CE1 = LOW and CE2 = HIGH for device selection, decoupling chip enable from output enable timing.

Byte power-down is triggered when both BHE and BLE are deasserted, forcing immediate transition to ultra-low ISB2 standby mode (≤8.7 µA) regardless of CE state. The ERR pin asserts HIGH only during active read cycles where a correctable error is found - it does not latch or indicate uncorrectable multi-bit errors.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package Type II (TSOP II), RoHS-compliant, lead-free, body size 10.16 mm × 18.4 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV25616BLL-45NLI and MT45W8MW16BGX-45IT:D, CY621472G30-45ZSXI uniquely combines pin-compatible TSOP II packaging, hardware ERR signaling, and sub-10 µA industrial-grade standby - enabling drop-in ECC assurance without layout or firmware changes.

Availability

CY621472G30-45ZSXI is available at Aetrix Electronics and suitable for industrial PLC memory buffers, medical imaging frame stores, and avionics data loggers requiring stable component supply, long-lifecycle support, and guaranteed ECC functionality.

Supply support for CY621472G30-45ZSXI 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 with emphasis on reliability and industrial longevity.

CY621472G30-45ZSXI belongs to the MoBL® (Mobile Binary Logic) SRAM product line, designed specifically for low-power, high-reliability embedded systems where data integrity, fast access, and extended temperature operation are mandatory.

FAQ

Does CY621472G30-45ZSXI support automatic error correction write-back?

No. The device detects and corrects single-bit errors during read operations but does not perform automatic write-back to the memory array. Corrected data is presented on I/O lines, and any persistent correction must be handled by external logic or firmware. This design avoids unintended writes during transient faults and maintains deterministic timing.

What is the function of the ERR pin, and when does it assert?

The ERR pin is an open-drain output that asserts HIGH only during the active portion of a read cycle when a single-bit error is detected and corrected in the accessed 16-bit word. It returns LOW after the read cycle completes and does not latch. It is not active during writes, standby, or deselect states.

Can CY621472G30-45ZSXI operate at 1.8 V?

No. This variant is specified only for the 2.2 V–3.6 V VCC range. While some MoBL devices support 1.65 V–2.2 V, CY621472G30-45ZSXI's speed grade (45 ns) and internal logic are characterized and guaranteed exclusively within 2.2–3.6 V. Operation below 2.2 V may result in timing violations or ECC failure.

Is the 44-pin TSOP II package RoHS-compliant and lead-free?

Yes. The "Z" in CY621472G30-45ZSXI denotes lead-free (Pb-free) construction, and the "SXI" suffix confirms industrial temperature grade (–40 °C to +85 °C) and TSOP II packaging. All materials comply with EU RoHS Directive 2011/65/EU and Infineon's substance restrictions policy.