Infineon Technologies CY7C1041B-15ZXC

Overview

CY7C1041B-15ZXC from Cypress Semiconductor is a 256K × 16-bit (4-Mbit) high-speed CMOS static RAM with 15 ns access time, 5 V supply, TTL-compatible I/O, and dual-byte write enable (BLE/BHE) for flexible 8-bit data bus interfacing in embedded controllers and industrial memory subsystems.

For engineers reviewing the CY7C1041B-15ZXC datasheet, CY7C1041B-15ZXC pinout, CY7C1041B-15ZXC application, or CY7C1041B-15ZXC equivalent, this page delivers verified timing specs, SOJ/TSOP II package mapping, byte-select operation details, and real-world memory expansion use cases - all grounded in Cypress Document #38-05142 Rev. *A.

Technical Context

The CY7C1041B-15ZXC implements a 1024 × 4096 memory array with separate row/column decoders and sense amplifiers. It supports three read modes (full-word, lower-byte, upper-byte) and three write modes, all controlled by CE, OE, WE, BLE, and BHE with defined setup/hold timing windows.

Its automatic power-down logic activates when CE is HIGH, reducing ICC to ≤40 mA (ISB1) or ≤3 mA (ISB2), and it guarantees data retention at 2.0 V with ≤400 µW consumption. The device uses internal voltage regulation to derive 3.3 V from 5 V supply for core logic.

Key Specifications

Pinout & Package

Package: 44-pin TSOP II (Type II, 400-mil body width) with center power/ground pinout - pin-compatible with industry-standard 44-pin SOJ but optimized for surface-mount density and thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed parallel SRAM applications.

Compared with IS61LV25616AL-15TQLI and R1LV25616AS-15SI, the CY7C1041B-15ZXC uniquely combines 5 V operation, true dual-byte control, and 2.0 V data retention - making it irreplaceable in legacy industrial and medical designs requiring robustness and interface flexibility.

Availability

CY7C1041B-15ZXC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy embedded controller cache, and medical diagnostic data loggers requiring stable component supply and long-term lifecycle support.

Supply support for CY7C1041B-15ZXC 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) is a U.S.-based semiconductor company specializing in memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.

The CY7C1041B series was designed specifically for high-reliability, 5 V parallel SRAM applications in industrial control and legacy computing systems - emphasizing timing precision, power-down efficiency, and pinout compatibility with JEDEC-standard memory sockets.

FAQ

Is CY7C1041B-15ZXC compatible with 3.3 V I/O systems?

No - the device requires 5.0 V ± 0.5 V for VCC and has TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). While inputs tolerate up to VCC + 0.5 V, they are not 3.3 V–native; interfacing with 3.3 V logic requires level translation or voltage clamping to avoid overvoltage damage.

What is the difference between ISB1 and ISB2 standby current specifications?

ISB1 (≤40 mA) applies when CE > VIH with TTL-level inputs (VIH = 2.2 V), representing worst-case leakage under marginal input conditions. ISB2 (≤3 mA) applies under CMOS-level inputs (VIN > VCC – 0.3 V or < 0.3 V), reflecting true low-power standby in well-designed 5 V logic systems with clean signal edges.

Can CY7C1041B-15ZXC operate in asynchronous burst mode with a modern FPGA?

Yes - its fixed 15 ns tRC and tAA allow predictable timing closure in FPGA-based memory controllers. However, it lacks synchronous clocking or burst addressing; each access requires full address and control assertion, limiting throughput compared to DDR or QDR SRAMs.

Does the "ZXC" suffix indicate lead-free or RoHS compliance?

Yes - the "Z" in ZXC denotes lead-free (Pb-free) construction per JEDEC J-STD-609, and "X" indicates halogen-free packaging. This part meets RoHS Directive 2011/65/EU and is suitable for environmentally regulated industrial and medical applications.