Infineon Technologies CY7C1049GN-10VXIT

Overview

CY7C1049GN-10VXIT from Infineon Technologies (formerly Cypress) is a 4-Mbit (512K × 8) asynchronous CMOS static RAM with 10 ns access time, TTL-compatible I/Os, and triple-voltage operation (1.65–2.2 V, 2.2–3.6 V, or 4.5–5.5 V). It delivers 38 mA typical active current and 6 mA typical standby current, supporting industrial temperature range (–40 °C to +85 °C) in a 44-pin TSOP II package for embedded memory buffering in legacy industrial controllers.

For engineers reviewing the CY7C1049GN-10VXIT datasheet, CY7C1049GN-10VXIT pinout, CY7C1049GN-10VXIT application, or CY7C1049GN-10VXIT equivalent, key selection criteria include verified 10 ns tAA timing at 5 V, dual-rail voltage flexibility, CE/OE/WE control logic compatibility, and TSOP II footprint suitability for space-constrained PCB layouts.

Technical Context

This SRAM implements a fully decoded 512K-word × 8-bit array with independent address latching via A0–A18 inputs and bidirectional data transfer on I/O0–I/O7. Control logic uses active-low Chip Enable (CE), Output Enable (OE), and Write Enable (WE) signals to manage read/write cycles and high-impedance output states.

It supports three distinct VCC operating ranges with corresponding VIH/VIL thresholds and drive strength tuning-ensuring interoperability with 1.8 V, 3.3 V, and 5 V logic families without level shifters. Data retention at 1.0 V enables low-power suspend modes in battery-backed systems.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package Type II (TSOP II), 400 mil width, lead-free, JEDEC MO-141AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar static RAM applications.

Compared with AS6C4008-10TIN and IS61LV5128-10ML, CY7C1049GN-10VXIT uniquely supports triple-voltage operation and guaranteed 1.0 V data retention-making it the only option for retrofitting legacy 5 V systems with modern low-voltage features or enabling true zero-power suspend functionality.

Availability

CY7C1049GN-10VXIT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy microcontroller data buffers, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for CY7C1049GN-10VXIT 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.

CY7C1049GN belongs to Infineon's legacy Cypress SRAM portfolio, designed specifically for industrial and embedded systems requiring robust, pin-compatible replacements for aging 5 V memory components with extended voltage flexibility.

FAQ

Is CY7C1049GN-10VXIT compatible with 5 V microcontrollers?

Yes. The device supports 4.5–5.5 V operation with TTL-compatible inputs and outputs, enabling direct connection to 5 V MCUs like the 8051, PIC18, or legacy ARM7 without level-shifting circuitry. VIH is guaranteed ≥2.0 V and VOL ≤0.4 V at 5 V, meeting standard TTL thresholds.

Does CY7C1049GN-10VXIT support automatic power-down?

Yes. When Chip Enable (/CE) is driven HIGH and input signals meet CMOS thresholds (VIN > VCC – 0.2 V or VIN < 0.2 V), the device enters automatic standby mode with ISB2 = 6 mA typical. This occurs without external control logic and is specified across the full industrial temperature range.

What is the maximum operating frequency for continuous read/write cycling?

The device does not specify a maximum clock frequency, as it is asynchronous. However, AC switching characteristics define minimum cycle times: tRC (read cycle) and tWC (write cycle) are both 20 ns at 5 V. This supports sustained random-access rates up to 50 MHz in practice, limited by board layout and signal integrity.

Can unused address pins (e.g., A15–A18) be left unconnected?

No. All address pins A0–A18 must be driven to valid logic levels (VIL or VIH) during operation. Floating address lines may cause undefined memory location access or increased ICC due to input stage contention. NC pins (e.g., pins 1, 2, 4, 5, 21–24, 44) may be left unconnected or tied to GND per layout best practices.