Infineon Technologies CY7C1049CV33-15VXE

Overview

CY7C1049CV33-15VXE from Infineon Technologies is a 4-Mbit asynchronous CMOS static RAM organized as 262,144 × 16 bits, operating at 3.3 V with 15 ns access time and industrial temperature range (–40°C to +85°C), used in legacy embedded controllers and FPGA configuration memory buffers.

For engineers reviewing the CY7C1049CV33-15VXE datasheet, CY7C1049CV33-15VXE pinout, CY7C1049CV33-15VXE application, or CY7C1049CV33-15VXE equivalent, key selection criteria include parallel x16 bus interface, single-supply 3.3 V operation, low-power standby current (≤1 µA), and SOJ-36 package compatibility with legacy PCB footprints.

Technical Context

This SRAM implements full asynchronous read/write control with separate OE#, WE#, and CE# inputs, supporting byte-wide or word-wide access via UB#/LB# signals. It uses standard TTL-compatible input thresholds and provides data hold time of 3 ns after WE# deassertion.

The device features automatic power-down mode when CE# is high, reducing ICC to ≤1 µA, and includes internal write-cycle timing control with no external wait-state logic required for 15 ns cycle time compliance.

Key Specifications

Pinout & Package

36-pin Small Outline J-lead (SOJ) package with 0.375-inch body width and 1.27 mm lead pitch; leads are gull-wing shaped with J-bend termination for through-hole or surface-mount assembly using wave or reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1049DV33-15VXI, the CY7C1049CV33-15VXE offers lower cost and sufficient thermal margin for most industrial controls, while IS61LV25616AL-15TQLI trades pin compatibility for wider availability but removes byte-select flexibility critical for partial-word writes.

Availability

CY7C1049CV33-15VXE is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration memory, and medical imaging frame store applications requiring stable component supply and long-lifecycle support.

Supply support for CY7C1049CV33-15VXE 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, and memory solutions, with global R&D and manufacturing infrastructure.

This part belongs to the CY7C1049C SRAM product line, designed specifically for legacy industrial and communications systems requiring reliable, pin-compatible replacements for aging 3.3 V parallel SRAMs.

FAQ

Is CY7C1049CV33-15VXE RoHS compliant?

Yes, CY7C1049CV33-15VXE is RoHS-compliant and lead-free per EU Directive 2011/65/EU, with matte tin (Sn) lead finish and halogen-free molding compound. Certificate of Compliance is available upon request for batch-specific traceability.

Can this SRAM be operated at 2.5 V?

No. The device is specified only for 3.3 V ±0.3 V operation. At 2.5 V, timing parameters including tAA (access time) and tHZ (output disable time) exceed specification limits, and data retention is not guaranteed beyond 100 hours.

Does it support battery backup operation?

Yes - with VCC disconnected and VBAT applied to VCC pin (via diode-OR circuit), the device retains data at –40°C to +85°C with ≤1 µA standby current, provided VBAT ≥2.0 V and meets minimum retention voltage per datasheet Section 6.2.

What is the maximum clock frequency for interfacing with a microcontroller?

This is an asynchronous SRAM with no clock input. Maximum effective bus frequency depends on total cycle time: for 15 ns access, minimum read/write cycle is 30 ns, supporting up to ~33 MHz sustained transfer rate on a 16-bit parallel bus with proper address/data setup/hold margins.