Infineon Technologies CY7C1041CV33-12BAXET

Overview

CY7C1041CV33-12BAXET from Cypress Semiconductor is an automotive-grade 4-Mbit (256 K × 16) CMOS static RAM with 12 ns access time, TTL-compatible I/O, and dual-byte write control via BHE/BLE. It operates across –40 °C to +125 °C (Automotive-E grade), supports automatic CE power-down (ISB2 ≤ 15 mA), and is packaged in a 44-pin TSOP II. It serves as main data buffer in engine control units requiring deterministic, non-volatile-access memory.

For engineers reviewing the CY7C1041CV33-12BAXET datasheet, CY7C1041CV33-12BAXET pinout, CY7C1041CV33-12BAXET application, or CY7C1041CV33-12BAXET equivalent, this page delivers verified timing parameters, byte-enable logic behavior, thermal resistance values (θJA = 42.96 °C/W), and package-specific pin mapping for SOJ/TSOP II - critical for ECU memory subsystem layout and power budgeting.

Technical Context

This SRAM implements a synchronous, address-decoded 256K × 16 array with independent high- and low-byte write enables (BHE/BLE), enabling partial-word writes without read-modify-write cycles. Its dual active-low chip enable (CE) and output enable (OE) support hierarchical memory banking and bus sharing in multi-master automotive systems.

It features automatic power-down when CE is deasserted, reducing standby current to ≤15 mA (Automotive-E) at VCC = 3.3 V ±10%. All I/Os are TTL-compatible (VIH ≥ 2.0 V, VOL ≤ 0.4 V), and switching characteristics are specified under controlled AC test loads (30 pF Thevenin for -12 speed grade).

Key Specifications

Pinout & Package

Package: 44-pin TSOP II (0.400" body width), JEDEC MO-141AC compliant, lead-free (Pb-free) finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-Mbit SRAM applications.

Compared with IS61WV25616EDBLL-12BLI and AS6C4008-12TIN, CY7C1041CV33-12BAXET uniquely combines AEC-Q100 Grade 1 qualification, dual-byte write control, and ≤15 mA ISB2 - making it the only option for power-constrained, real-time automotive control nodes requiring deterministic 8-bit memory updates.

Availability

CY7C1041CV33-12BAXET is available at Aetrix Electronics and suitable for engine control units, transmission control modules, ADAS camera ECUs, and body control modules requiring stable component supply across extended automotive temperature ranges and long production lifecycles.

Supply support for CY7C1041CV33-12BAXET 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 IoT applications, with global manufacturing and qualification infrastructure.

CY7C1041CV33 belongs to Cypress's automotive SRAM product line, engineered specifically for real-time control systems requiring guaranteed timing, extended temperature operation, and AEC-Q100 compliance - not general-purpose computing memory.

FAQ

Is CY7C1041CV33-12BAXET pin-compatible with CY7C1041BNV33?

Yes, CY7C1041CV33-12BAXET is pin- and function-compatible with CY7C1041BNV33 per datasheet Section 1. It shares identical pinout, electrical interface, and timing architecture. However, CV33 adds automotive qualification (AEC-Q100 Grade 1), enhanced thermal resistance (θJA = 42.96 °C/W), and tighter ISB2 specification (≤15 mA vs. BNV33's 20 mA), making it suitable for under-hood deployment where BNV33 is limited to commercial/industrial use.

What is the maximum clock frequency supported for burst read operations?

CY7C1041CV33-12BAXET does not use a clock input; it is an asynchronous SRAM. Burst reads are governed by tRC (read cycle time) of 12 ns minimum, allowing up to 83.3 MHz effective throughput when continuously addressed. Address setup/hold and OE timing (tDOE = 6–8 ns) determine achievable sustained bandwidth in microcontroller interfaces, not a clock signal.

Can BHE and BLE be asserted simultaneously for full 16-bit writes?

Yes, asserting both BHE and BLE LOW while CE and WE are LOW enables simultaneous write to all 16 I/O lines (I/O0–I/O15). This is the standard full-word write mode. The device does not require external logic to coordinate - the internal array accepts full 16-bit data when both byte enables are active, matching typical 16-bit MCU bus behavior.

Does the 44-pin TSOP II package include thermal pads or exposed die attach?

No, the 44-pin TSOP II package (MO-141AC) used for CY7C1041CV33-12BAXET has no thermal pad or exposed die attach. Thermal dissipation relies on PCB copper area connected to VCC/VSS pins and ambient convection. Its θJA is specified at 42.96 °C/W under JEDEC JESD51-2 conditions, confirming standard surface-mount thermal performance without auxiliary heatsinking.