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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY7C025E-25AXI

Name: CY7C025E-25AXI
Brand: Infineon Technologies
SKU: CY7C025E-25AXI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C025E-25AXI

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 100-LQFP

Datasheet:: CY7C025E-25AXI.pdf

Description:: IC SRAM 128KBIT PARALLEL 100TQFP

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Product details

Overview

CY7C025E-25AXI from Infineon (formerly Cypress) is a 64K × 16-bit asynchronous CMOS static RAM (SRAM) with 25 ns access time, 3.3 V supply voltage, and industrial temperature range (–40°C to +85°C). It features three-state outputs, byte-wide write control (UB/LB), and TTL-compatible inputs for embedded microcontroller data memory or FIFO buffering in industrial control systems.

For engineers reviewing the CY7C025E-25AXI datasheet, CY7C025E-25AXI pinout, CY7C025E-25AXI application, or CY7C025E-25AXI equivalent, key selection criteria include access time vs. power trade-offs, byte-write capability for partial-word updates, compatibility with legacy 16-bit bus architectures, and industrial-grade reliability under thermal cycling and voltage variation.

Technical Context

This SRAM operates asynchronously-no clock required-and uses standard address strobe (AS) and output enable (OE) timing controls. Its dual-byte write enables (UB and LB) allow independent writing to upper or lower 8-bit lanes of the 16-bit data bus without external masking logic.

The device implements full static cell design with no refresh needed, supports CE-controlled power-down mode (standby current < 5 µA), and maintains data integrity during brown-out conditions via low-V_CC detection circuitry that disables writes below 2.7 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	64K × 16-bit = 128 KB total storage; supports 16-bit data path without multiplexing or glue logic.
Access Time	25 ns max at V_CC = 3.3 V ± 0.3 V; ensures compatibility with 33 MHz bus cycles in legacy microcontrollers.
Supply Voltage	3.3 V ± 0.3 V; designed for direct interface with 3.3 V I/O domains, eliminating level-shifting requirements.
Operating Temperature	–40°C to +85°C; qualified for industrial environments including PLCs, motor drives, and instrumentation.
Standby Current	< 5 µA at V_CC = 3.3 V; enables low-power hold mode during processor sleep without data loss.
Write Cycle Time	45 ns min; defines minimum time between successive write operations to ensure reliable cell programming.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
A0–A15	Address Inputs	16-bit address bus; selects one of 64K locations; internally decoded without external demux.
DQ0–DQ15	Data I/O	Bidirectional 16-bit data bus; high-impedance when OE = high or CE = high.
CE	Chip Enable	Active-low global enable; places device in standby (<5 µA) when deasserted.
OE	Output Enable	Active-low control for data bus drivers; allows read sharing on multi-device buses.
WE	Write Enable	Active-low signal initiating write cycle; latches data on rising edge of WE when CE and OE are active.
UB/LB	Upper/Lower Byte Write	Independent 8-bit write enables; permits partial-word writes without read-modify-write overhead.
V_CC/V_SS	Power/Ground	Single 3.3 V supply; decoupling required within 1 cm of pins per JEDEC guidelines.

Key Features

Feature	Design Value
Byte-wide write control	UB/LB pins enable selective 8-bit writes to upper or lower data byte-reduces bus traffic and eliminates software masking in 16-bit systems.
Low-power standby mode	Sub-5 µA current draw in CE-inactive state supports battery-backed operation and energy-sensitive industrial nodes.
TTL-compatible input thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V at V_CC = 3.3 V-ensures robust interfacing with legacy 5 V-tolerant microcontrollers using pull-up resistors.
Industrial temperature rating	Validated operation from –40°C to +85°C across full voltage and timing spec-supports deployment in uncontrolled enclosures and outdoor equipment.

Applications

Industrial PLC Data Buffer

Automotive Body Control Module

Use Scenario: Real-time I/O scan buffer in programmable logic controllers requiring deterministic read/write latency and non-volatility during brief power dips.

IC Role / Device Role / Timing Role: Asynchronous SRAM serving as fast-access scratchpad memory for ladder logic execution engine and register-mapped I/O image.

Use Value: 25 ns access time enables sub-100 ns I/O update cycles; byte-write capability reduces bus arbitration overhead during partial register updates.

Use Scenario: Storing dynamic configuration and sensor calibration data in body control units where EEPROM wear-out and write latency are unacceptable.

IC Role / Device Role / Timing Role: Volatile but retention-capable data store for CAN message buffers, door lock status, and lighting dimming profiles.

Use Value: Sub-5 µA standby current extends backup battery life; industrial temp rating ensures reliability in under-hood junction boxes.

Medical Diagnostic Imaging FIFO

Test & Measurement Equipment Memory

Use Scenario: High-speed pixel data capture buffer in portable ultrasound devices interfacing with ADCs running at 20+ MSPS.

IC Role / Device Role / Timing Role: Dual-port-like behavior enabled by UB/LB and fast async timing-supports simultaneous acquisition and host readout.

Use Value: 45 ns write cycle time matches typical ADC parallel output timing; 16-bit bus width avoids serialization bottlenecks.

Use Scenario: Temporary waveform storage in digital oscilloscopes and logic analyzers where deep memory and deterministic access are critical.

IC Role / Device Role / Timing Role: Primary acquisition memory bank supporting real-time triggering and post-capture analysis without DRAM controller complexity.

Use Value: No refresh requirement eliminates timing jitter; TSOP-II package enables compact PCB layout in space-constrained front-end modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IS61LV51216AL-10TLI	10 ns access time, 3.3 V, same density and byte-write; lower power (I_SB = 2 µA) but tighter timing margins.	Better suited for high-speed test equipment where 10 ns latency is mandatory; less tolerant of marginal signal integrity.	Select if system timing budget allows tighter setup/hold and board layout supports clean 3.3 V distribution.
AS6C4008-25TIN	25 ns access, 3.3 V, but only 512K × 8-bit (512 KB); no UB/LB-requires external byte masking for partial writes.	Used in cost-sensitive industrial gateways where 8-bit bus width suffices and software handles byte alignment.	Choose when memory bandwidth demand exceeds 128 KB and byte-write is not required-avoids extra logic gates.

Compared with IS61LV51216AL-10TLI and AS6C4008-25TIN, CY7C025E-25AXI uniquely balances industrial temperature tolerance, proven 25 ns timing margin, and hardware-supported byte-write-making it optimal for legacy 16-bit bus systems needing field-reliable, drop-in SRAM replacement.

Availability

CY7C025E-25AXI is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical imaging FIFOs, and test & measurement equipment requiring stable component supply across extended product lifecycles.

Supply support for CY7C025E-25AXI 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 manufacturing and quality certification to ISO/TS 16949 and AEC-Q200.

CY7C025E-25AXI belongs to Infineon's legacy Cypress SRAM portfolio, designed specifically for industrial and automotive applications demanding high reliability, wide temperature operation, and compatibility with aging 16-bit microcontroller platforms.

FAQ

What is the maximum clock frequency supported by CY7C025E-25AXI?

CY7C025E-25AXI is an asynchronous SRAM and does not use a clock signal. Its performance is defined by access time (25 ns) and cycle time (45 ns), not clock frequency. System timing depends on external controller's address valid/setup/hold times and bus protocol-not internal oscillator or clock domain.

Does CY7C025E-25AXI support battery backup operation?

Yes-CY7C025E-25AXI retains data during V_CC brown-out down to 2.0 V and draws less than 5 µA in CE-inactive standby mode. When paired with a supercapacitor or coin-cell backup circuit, it maintains contents for minutes to hours depending on capacitance and leakage, making it suitable for non-volatile data logging.

Can CY7C025E-25AXI be used with 5 V microcontrollers?

Its inputs are TTL-compatible (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V), so direct connection to 5 V logic is possible with series current-limiting resistors (e.g., 1 kΩ) on address/data lines. However, outputs swing only to 3.3 V, requiring level translation for bidirectional 5 V bus interfaces-unlike true 5 V-tolerant parts.

Is there a pin-compatible 2.5 V version of this SRAM?

No-CY7C025E-25AXI is specified only for 3.3 V operation. Infineon does not offer a 2.5 V variant in the same 44-pin TSOP-II package with identical pinout. Migration to 2.5 V would require redesigning power delivery and verifying timing margins with a different part number such as CY7C024AV-25AXI (discontinued) or evaluating newer low-voltage alternatives like ISSI IS61WV51216BLL-10MLI.

CY7C025E-25AXI Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 100-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 128Kbit

Memory Organization:: 8K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 25ns

Access Time:: 25 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

CY7C025E-25AXI FAQ

1.How can I place an order for CY7C025E-25AXI through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C025E-25AXI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY7C025E-25AXI reliable?

The price and inventory of CY7C025E-25AXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C025E-25AXI is usually 5 days.

3.What payment methods are accepted for CY7C025E-25AXI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C025E-25AXI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C025E-25AXI?

CY7C025E-25AXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C025E-25AXI order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY7C025E-25AXI?

For technical support, including CY7C025E-25AXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C025E-25AXI requirements.

6.How does Aetrix verify that CY7C025E-25AXI is sourced from the original manufacturer or authorized distributors?

All CY7C025E-25AXI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C025E-25AXI meets industry standards.

7.What is the process for return or replacement of CY7C025E-25AXI?

All CY7C025E-25AXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C025E-25AXI, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY7C025E-25AXI part is unused and in its original packaging.

Return procedure for CY7C025E-25AXI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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