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

Infineon Technologies CY62256NLL-70SNXAT

Name: CY62256NLL-70SNXAT
Brand: Infineon Technologies
SKU: CY62256NLL-70SNXAT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY62256NLL-70SNXAT

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: CY62256NLL-70SNXAT.pdf

Description:: IC SRAM 256KBIT PARALLEL 28SOIC

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Inventory:4,801

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Product details

Overview

CY62256NLL-70SNXAT from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) CMOS static RAM with 70 ns access time, 4.5–5.5 V operation, and industrial temperature range (–40 °C to +85 °C). It features automatic CE-controlled power-down (82.5 µW max standby), TTL-compatible I/O, and tristate outputs for memory expansion in embedded controllers and instrumentation systems.

For engineers reviewing the CY62256NLL-70SNXAT datasheet, CY62256NLL-70SNXAT pinout, CY62256NLL-70SNXAT application, or CY62256NLL-70SNXAT equivalent, key selection criteria include its 70 ns read cycle time, 32K × 8 organization, low ISB2 standby current (≤10 µA), and support for CE/OE/WE control logic in multi-chip memory architectures.

Technical Context

The CY62256NLL-70SNXAT implements a full CMOS 32K × 8 SRAM array with independent row/column decoding, sense amplifiers, and input/output buffers. Its control architecture relies on three active-low signals-CE, OE, and WE-to manage chip selection, output enable, and write/read mode switching without external latching.

Power management is handled via automatic CE-driven power-down: when CE is HIGH, internal circuitry enters ultra-low-power retention mode (ISB2 ≤10 µA), reducing consumption by >99.9% versus active operation. All inputs and outputs meet TTL voltage thresholds and drive specifications under 5 V ±10% supply conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	256 Kbit (32 K × 8) - supports byte-wide data bus interfacing without address multiplexing
Access time	70 ns - defines maximum clock rate for synchronous read cycles in microcontroller-based systems
V_CC range	4.5 V to 5.5 V - compatible with standard 5 V logic rails and tolerant of supply ripple
Standby current (I_SB2)	≤10 µA at –40 °C to +85 °C - enables battery-backed retention in industrial logging devices
Operating current (I_CC)	≤50 mA at f_MAX - limits thermal load in dense PCB layouts with multiple memory devices
Input capacitance	6 pF - minimizes loading on address/data bus drivers in high-speed parallel interfaces
Data retention voltage	2.0 V minimum - allows operation down to brown-out levels while preserving memory contents

Pinout & Package

Package: 28-pin narrow SOIC (300-mil), RoHS-compliant, surface-mountable with standard reflow profile.

Pin/Terminal	Circuit Role	Design Meaning
A0–A14	Address inputs	15-bit address bus supporting full 32K-word addressing; no multiplexing required
I/O0–I/O7	Bidirectional data lines	Tristate-capable pins shared for read/write; require external bus arbitration in multi-device systems
CE	Chip enable (active LOW)	Primary selection signal; asserts power-down mode when deasserted (HIGH)
OE	Output enable (active LOW)	Controls I/O direction: LOW = output, HIGH = high-impedance input mode
WE	Write enable (active LOW)	Determines operation mode: LOW = write, HIGH = read (when CE and OE are active)
V_CC	Power supply	5 V nominal supply; decoupling capacitor required within 10 mm of pin 28
GND	Ground reference	Common return path for all signals; must be connected to low-impedance system ground plane

Key Features

Feature	Design Value
Automatic CE power-down	Reduces standby power to ≤10 µA without external control logic or sleep-mode firmware overhead
TTL-compatible I/O	Eliminates level-shifting requirements when interfacing with legacy 5 V microcontrollers and FPGAs
Tristate output drivers	Enables direct connection to shared data buses without external bus transceivers
CMOS process technology	Delivers optimal balance of 70 ns speed and <275 mW active power dissipation at full frequency

Applications

Industrial Data Logger

Automotive Engine Control Unit

Use Scenario: Continuous sensor sampling and timestamped storage in harsh-temperature environments.

IC Role / Device Role / Timing Role: Nonvolatile buffer memory holding pre-processed CAN message payloads before flash write.

Use Value: 82.5 µW standby power enables months-long battery operation during vehicle ignition-off periods.

Use Scenario: Real-time calibration parameter storage and runtime variable buffering in ECU mainboard.

IC Role / Device Role / Timing Role: Fast-access scratchpad memory for PID loop variables and lookup table caching.

Use Value: 70 ns access time supports deterministic response within 100 µs control cycles at 125 °C junction temperature.

Medical Diagnostic Monitor

Programmable Logic Controller

Use Scenario: Temporary waveform capture and analysis buffer in portable ultrasound units.

IC Role / Device Role / Timing Role: High-reliability frame buffer storing digitized ADC samples prior to DSP processing.

Use Value: Automatic power-down on CE deassertion prevents data corruption during power interruption events.

Use Scenario: Ladder logic execution stack and I/O mapping cache in DIN-rail mounted PLC modules.

IC Role / Device Role / Timing Role: Deterministic memory resource for real-time task scheduling and register mirroring.

Use Value: 32K × 8 organization provides sufficient depth for dual-port shadow RAM implementation without external glue logic.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AS6C4008-70SCN	Same 32K × 8 organization and 70 ns speed, but 2.7–3.6 V only; no 5 V tolerance	Requires separate 3.3 V rail; unsuitable for mixed-voltage 5 V systems	Select only if system uses 3.3 V core logic and board space constraints favor smaller TSOP package
IS62WV2568BLL-70NLI	256K × 8 (larger density), 70 ns, 2.7–3.6 V; includes BYTE# control for x8/x16 mode	Higher capacity but incompatible voltage range and pinout; requires PCB redesign	Choose when future-proofing for larger memory footprint and migrating to 3.3 V architecture

Compared with AS6C4008-70SCN and IS62WV2568BLL-70NLI, the CY62256NLL-70SNXAT uniquely supports 5 V operation with industrial temperature rating and automatic CE power-down-making it the only drop-in replacement for legacy 5 V embedded designs requiring minimal BOM change.

Availability

CY62256NLL-70SNXAT is available at Aetrix Electronics and suitable for industrial data loggers, automotive engine control units, medical diagnostic monitors, and programmable logic controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY62256NLL-70SNXAT 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and memory solutions with emphasis on reliability and industrial-grade performance.

This device belongs to Infineon's legacy Cypress SRAM portfolio, designed specifically for robust, low-power, parallel-interface memory applications in mission-critical embedded systems where 5 V compatibility and extended temperature operation are mandatory.

FAQ

What is the maximum operating frequency supported by CY62256NLL-70SNXAT?

The CY62256NLL-70SNXAT has a 70 ns access time, corresponding to a maximum read cycle frequency of approximately 14.3 MHz. This is derived from t_RC = 70 ns, and the device does not include internal clock circuitry-it operates asynchronously using CE, OE, and WE timing controls per the datasheet switching characteristics table.

Does CY62256NLL-70SNXAT support battery backup operation?

Yes-the device supports data retention down to V_CC = 2.0 V with typical ICCDR of 0.1 µA, enabling use with coin-cell batteries or supercapacitors during main power loss. Retention mode activates automatically when CE is HIGH and V_CC remains ≥2.0 V, preserving stored data without external control signals.

Can CY62256NLL-70SNXAT be used in place of CY62256NLL-55?

Yes, as a functional and pin-compatible upgrade-both share identical pinout, voltage range, and command protocol. The -70 version has slower timing (70 ns vs. 55 ns) but identical DC characteristics and power behavior. System timing margins must be verified, especially in high-frequency read/write burst scenarios where the 15 ns penalty may affect setup/hold compliance.

Is CY62256NLL-70SNXAT RoHS compliant and lead-free?

Yes-this part number (ending in "XAT") denotes Infineon's RoHS-compliant, lead-free narrow SOIC packaging. The device meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for standard Pb-free reflow profiles with peak temperature up to 260 °C, as confirmed in the official Infineon ordering information and package diagrams.

CY62256NLL-70SNXAT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: MOBL™

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Asynchronous

Memory Size:: 256Kbit

Memory Organization:: 32K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 70ns

Access Time:: 70 ns

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SOIC

CY62256NLL-70SNXAT FAQ

1.How can I place an order for CY62256NLL-70SNXAT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY62256NLL-70SNXAT 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 CY62256NLL-70SNXAT reliable?

The price and inventory of CY62256NLL-70SNXAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NLL-70SNXAT is usually 5 days.

3.What payment methods are accepted for CY62256NLL-70SNXAT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NLL-70SNXAT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY62256NLL-70SNXAT?

CY62256NLL-70SNXAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY62256NLL-70SNXAT 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 CY62256NLL-70SNXAT?

For technical support, including CY62256NLL-70SNXAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NLL-70SNXAT requirements.

6.How does Aetrix verify that CY62256NLL-70SNXAT is sourced from the original manufacturer or authorized distributors?

All CY62256NLL-70SNXAT 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 CY62256NLL-70SNXAT meets industry standards.

7.What is the process for return or replacement of CY62256NLL-70SNXAT?

All CY62256NLL-70SNXAT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NLL-70SNXAT, 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 CY62256NLL-70SNXAT part is unused and in its original packaging.

Return procedure for CY62256NLL-70SNXAT:

1.Submit a request within 90 days.

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

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