Infineon Technologies CY7C1049G18-15ZSXIT

Overview

CY7C1049G18-15ZSXIT from Cypress Semiconductor is a 4-Mbit (512K × 8) static RAM with embedded single-bit error-correcting code (ECC), TTL-compatible I/O, and ERR output for real-time error detection/correction. It operates across three voltage ranges (1.65–2.2 V, 2.2–3.6 V, 4.5–5.5 V), delivers 15 ns access time (tAA), and supports industrial temperature (–40 °C to +85 °C) in a 44-pin TSOP II package - used in mission-critical memory subsystems requiring data integrity.

For engineers reviewing the CY7C1049G18-15ZSXIT datasheet, CY7C1049G18-15ZSXIT pinout, CY7C1049G18-15ZSXIT application, or CY7C1049G18-15ZSXIT equivalent, this page provides verified functional identity, ECC behavior, voltage-flexible timing, ERR signal semantics, and validated alternative SRAMs with ECC support.

Technical Context

This device 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 in the accessed word - no latching or interrupt generation.

It supports dual supply voltage modes: low-voltage operation (1.65–2.2 V) with 15 ns tAA and 6 mA ISB2 standby current, and higher-voltage modes (2.2–3.6 V and 4.5–5.5 V) with 10 ns tAA and 38 mA ICC typical active current. All modes retain data at 1.0 V.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package Type II (TSOP II), RoHS-compliant, lead-free, body dimensions 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-15TIN and IS61WV5128BLL-15KLI, CY7C1049G18-15ZSXIT uniquely delivers both autonomous single-bit correction and real-time ERR assertion - critical for ISO 26262 ASIL-B or IEC 62304 Class C systems where error transparency is mandated.

Availability

CY7C1049G18-15ZSXIT is available at Aetrix Electronics and suitable for industrial control systems, military avionics data loggers, and railway signaling controllers requiring stable component supply, long-term lifecycle support, and guaranteed ECC functionality.

Supply support for CY7C1049G18-15ZSXIT 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for automotive, industrial, and aerospace applications, with emphasis on functional safety and long-lifecycle support.

CY7C1049G series belongs to Cypress's industrial-grade SRAM portfolio, engineered specifically for systems demanding error resilience without external ECC logic - targeting rail, defense, and medical equipment where data integrity is non-negotiable.

FAQ

Does CY7C1049G18-15ZSXIT support automatic write-back after error correction?

No. Per datasheet Note 1, this device performs single-bit error correction during read cycles but does not automatically write the corrected data back to the memory array. Host logic must initiate a separate write cycle if persistent correction is required. The ERR pin signals correction occurrence but does not imply data restoration in memory.

What is the exact function of the ERR pin during a read cycle?

The ERR pin is an open-drain output that asserts HIGH only when a single-bit error is both detected and successfully corrected in the currently accessed 8-bit word. It remains LOW for error-free reads, uncorrectable multi-bit errors, or during writes. External pull-up is mandatory; no internal pull-up exists.

Can CY7C1049G18-15ZSXIT operate at 2.5 V supply?

Yes. The device supports the 2.2 V to 3.6 V VCC range, and 2.5 V falls within specification. At 2.5 V, it achieves 10 ns access time (tAA), 38 mA typical ICC, and 6 mA typical ISB2 - confirmed in Table on page 2 of datasheet 001-95412 Rev. *F under "CY7C1049G(E)30" speed grade.

How many address pins does CY7C1049G18-15ZSXIT require for full memory access?

19 address pins (A0 through A18) are required. This matches the 512K-word (2¹⁹) depth of the 512K × 8-bit organization. A18 is the most significant address bit and is present on pin 42 of the 44-pin TSOP II package, as shown in Figure 3 of the datasheet.