Infineon Technologies CY7C1041BNV33L-12ZXCT

Overview

CY7C1041BNV33L-12ZXCT from Infineon (formerly Cypress) is a 4-Mbit asynchronous static RAM (SRAM) with 256K × 16 organization, 3.3 V supply, and 12 ns access time. It features TTL-compatible inputs/outputs, low-power standby mode (≤1 µA), and operates across industrial temperature range (–40°C to +85°C). Used in network packet buffering, industrial PLC data tables, and FPGA configuration memory.

For engineers reviewing the CY7C1041BNV33L-12ZXCT datasheet, CY7C1041BNV33L-12ZXCT pinout, CY7C1041BNV33L-12ZXCT application, or CY7C1041BNV33L-12ZXCT equivalent, key selection criteria include access time vs. power trade-off, byte-wide write enable control, industrial-grade temperature margin, and compatibility with legacy 16-bit parallel bus interfaces.

Technical Context

This SRAM implements a fully decoded asynchronous architecture with independent chip enable (CE1, CE2), output enable (OE), and write enable (WE) controls - enabling flexible memory mapping and partial write operations. All control signals are active-low and edge-insensitive, supporting direct interfacing with microcontrollers and FPGAs without timing glue logic.

It uses CMOS process technology with on-chip address latching and data hold circuitry, ensuring reliable read/write operation at full speed without external wait-state generation. The device supports byte-wide writes via UB/LB pins, allowing selective upper- or lower-byte modification without affecting adjacent data.

Key Specifications

Pinout & Package

The CY7C1041BNV33L-12ZXCT is housed in a 48-pin TSOP II (Thin Small Outline Package) with 12 × 20 mm body and 0.5 mm pitch, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-10TLI and AS6C4008-12ZIN, the CY7C1041BNV33L-12ZXCT offers optimal balance of proven industrial reliability, TSOP II manufacturability, and 12 ns timing - making it preferred for long-lifecycle industrial equipment where qualification stability outweighs marginal speed gains.

Availability

CY7C1041BNV33L-12ZXCT is available at Aetrix Electronics and suitable for industrial PLCs, network gateways, FPGA-based controllers, and motor drive systems requiring stable component supply over extended production lifecycles.

Supply support for CY7C1041BNV33L-12ZXCT 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 German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and memory products, with global R&D and manufacturing infrastructure.

This part belongs to Infineon's legacy Cypress SRAM portfolio, designed specifically for industrial and communications equipment demanding high reliability, wide temperature operation, and long-term supply assurance.

FAQ

What is the maximum clock frequency supported for read/write cycles?

The CY7C1041BNV33L-12ZXCT is an asynchronous SRAM and does not use a clock signal. Its timing is governed by setup/hold requirements relative to control edges: minimum CE/WE/OE pulse width is 12 ns, and address valid-to-OE low is 12 ns. System bus timing must comply with these parameters rather than a clock frequency.

Does this SRAM support battery backup operation?

Yes - with V_CC supplied from a backup source (e.g., coin cell via diode OR-ing), the device maintains data integrity down to V_CC = 2.0 V and draws ≤1 µA in standby. Data retention is guaranteed for ≥24 hours at V_CC ≥ 2.0 V and T_A ≤ +85°C per datasheet specification.

Can UB and LB be asserted simultaneously for full 16-bit writes?

Yes - asserting both UB and LB low enables full 16-bit write operation identical to standard WE-controlled writes. This mode is electrically identical to using WE alone, but provides explicit byte-select control for systems requiring strict byte-level granularity.

Is there a lead-free and RoHS-compliant version available?

Yes - the "-12ZXCT" suffix denotes a lead-free, RoHS-compliant, halogen-free, and green-packaged variant in TSOP II. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020D.2.