Infineon Technologies CY7C1049G-10ZSXIT

Overview

CY7C1049G-10ZSXIT from Cypress Semiconductor is a 4-Mbit (512K × 8) CMOS static RAM with embedded single-bit error-correcting code (ECC), TTL-compatible I/O, 10 ns access time, and operation across 1.65–2.2 V, 2.2–3.6 V, and 4.5–5.5 V supply ranges. It supports industrial temperature range (–40 °C to +85 °C) and is used in mission-critical memory subsystems requiring data integrity, such as avionics control modules and medical imaging buffers.

For engineers reviewing the CY7C1049G-10ZSXIT datasheet, CY7C1049G-10ZSXIT pinout, CY7C1049G-10ZSXIT application, or CY7C1049G-10ZSXIT equivalent, key selection criteria include ECC-enabled single-bit correction capability, multi-voltage support, 10 ns tAA timing, ERR signal absence (this variant lacks ERR pin), and SOJ-36 package compatibility with legacy SRAM footprints.

Technical Context

This device implements a full 512K × 8-bit asynchronous SRAM array with integrated ECC encoding/decoding logic on-die. The ECC engine corrects single-bit errors during read cycles without write-back and asserts no ERR output - consistent with the "G" (no ERR) suffix in the ordering code. Address decoding uses standard row/column architecture with A0–A18 inputs.

All control signals (CE, OE, WE) are active-low and fully compatible with TTL voltage thresholds. I/O lines I/O0–I/O7 operate in high-impedance state when CE is HIGH or OE is deasserted. Data retention at 1.0 V is supported with ICCDR ≤ 8 mA under specified conditions.

Key Specifications

Pinout & Package

The CY7C1049G-10ZSXIT is packaged in a 36-pin Small Outline J-Lead (SOJ) with gull-wing leads, JEDEC MS-025 compliant, lead-free finish, and 1.27 mm pitch. Pin 1 is marked by a beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV5128BLL-10MLI, CY7C1049G-10ZSXIT reduces system-level validation effort via integrated ECC, while versus CY7C1049G-10VXI, it delivers superior thermal performance in compact SOJ layouts-critical for convection-cooled avionics and medical enclosures.

Availability

CY7C1049G-10ZSXIT is available at Aetrix Electronics and suitable for avionics flight control memory, medical imaging frame buffers, and industrial PLC program storage requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for CY7C1049G-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

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-term supply stability.

CY7C1049G belongs to Cypress's industrial-grade asynchronous SRAM portfolio, engineered specifically for systems demanding hardware ECC, multi-voltage interoperability, and extended temperature operation without derating.

FAQ

Does CY7C1049G-10ZSXIT support automatic error correction during write operations?

No. The device performs single-bit error correction only during read cycles. It does not support automatic write-back on error detection, as explicitly stated in Note 1 of the datasheet. Error correction is applied transparently to read data before output, but no corrective action occurs on the stored value unless rewritten by the host system.

What is the function of the NC pins in the 36-pin SOJ package?

The NC pins (A9, A10, A4, A0 at positions 18, 17, 32, 36) are not connected internally to the silicon die. They must remain unconnected on the PCB and should not be tied to VCC, GND, or any signal. Routing traces to these pins may introduce parasitic coupling or violate JEDEC mechanical specifications.

Can CY7C1049G-10ZSXIT operate at 2.5 V supply?

No. The device supports only three discrete VCC ranges: 1.65–2.2 V, 2.2–3.6 V, and 4.5–5.5 V. Operation at 2.5 V falls outside all specified ranges and is not characterized or guaranteed. At 2.5 V, parameters like tAA, ICC, and VIH/VIL thresholds are undefined and may result in timing violations or functional failure.

Is the 10 ns access time valid across all voltage ranges?

Yes. The 10 ns tAA specification applies to both the 2.2–3.6 V and 4.5–5.5 V VCC ranges, as confirmed in the Product Portfolio table on page 2. For the 1.65–2.2 V range, the speed grade is 15 ns (CY7C1049G-15), so CY7C1049G-10ZSXIT is not rated for 10 ns operation in that range.