Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Cypress Semiconductor Corp CY14B256Q2-LHXI

Name: CY14B256Q2-LHXI
Brand: Cypress Semiconductor Corp
SKU: CY14B256Q2-LHXI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CY14B256Q2-LHXI

Manufacturer:: Cypress Semiconductor Corp

Category:: Memory

Package:: 8-WDFN Exposed Pad

Description:: NVRAM NVSRAM SERIAL-SPI 256KBIT

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:864

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CY14B256Q2-LHXI from Infineon Technologies (formerly Cypress) is a 256-Kbit (32K × 8) serial SPI nonvolatile SRAM with AutoStore capability enabled via VCAP pin, 40-MHz SPI interface supporting modes 0 and 3, and hardware STORE/RECALL control via HSB pin. It delivers infinite SRAM write cycles, 1 million STORE cycles to QuantumTrap nonvolatile elements, and 20-year data retention - deployed in industrial PLCs for real-time parameter backup during brownout events.

For engineers reviewing the CY14B256Q2-LHXI datasheet, CY14B256Q2-LHXI pinout, CY14B256Q2-LHXI application, or CY14B256Q2-LHXI equivalent, key selection criteria include AutoStore capacitor support (VCAP), absence of WP pin, HSB-driven hardware STORE timing, and compatibility with SPI mode 0/3 at 40 MHz in industrial temperature range (–40°C to +85°C).

Technical Context

The CY14B256Q2-LHXI integrates SRAM and QuantumTrap SONOS-based nonvolatile storage in a single die, enabling parallel STORE/RECALL between volatile and nonvolatile arrays without external controllers. Its SPI slave architecture uses standard opcodes plus four nvSRAM-specific instructions: STORE, RECALL, ASENB, and ASDISB.

AutoStore triggers on VCC ramp-down using energy stored in an external capacitor on VCAP, while Hardware STORE initiates immediately upon HSB pin assertion. The device inhibits all memory access during STORE/RECALL and signals busy status via HSB pin low and RDY bit in Status Register.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	256 Kbit (32K × 8): Full byte-addressable array with zero-cycle-delay read/write at SPI bus speed.
SPI Clock Rate	40 MHz: Enables 5 MB/s peak throughput; supports both mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1).
AutoStore Support	Yes, via VCAP pin: Requires external capacitor (typ. 4.7 µF) to sustain STORE during power loss; not present in CY14B256Q1.
Hardware STORE	Yes, via HSB pin: Active-low assertion initiates immediate STORE; HSB outputs busy status (low) during operation.
Data Retention	20 years: Guaranteed nonvolatile data hold at T_A = 85°C; independent of SRAM cycling.
Endurance	1M STORE cycles: QuantumTrap cell endurance limit; SRAM side supports infinite reads/writes.
Supply Voltage	2.7 V to 3.6 V: Single 3V ±10% rail; no separate V_IO required; compatible with 3.3V logic systems.

Pinout & Package

Package: 16-pin SOIC (300 mil), RoHS-compliant, industrial temperature grade (–40°C to +85°C). Exposed pad not present in SOIC variant.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable; places device in standby (I_SB ≤ 10 µA) when HIGH.
SCK	Serial Clock	Input clock up to 40 MHz; latches SI on rising edge, drives SO on falling edge.
SI	Serial Input	Accepts all SPI opcodes and data; supports WRITE, READ, STORE, RECALL, WRSR, etc.
SO	Serial Output	Drives read data and status bits; tri-stated when CS HIGH or HOLD active.
HOLD	Operation Suspend	Active-low; pauses ongoing SPI transfer without resetting internal address counter.
HSB	Hardware STORE Busy	Open-drain output: LOW during STORE/RECALL; pulled HIGH post-operation; also accepts STORE trigger when driven LOW.
VCAP	AutoStore Capacitor	Connects external capacitor (4.7 µF typical); supplies energy for automatic STORE on VCC drop; must not be grounded.
VSS	Ground	Reference for all I/O and core logic; requires low-impedance connection to system GND plane.
VCC	Power Supply	2.7–3.6 V main supply; powers SRAM, logic, and QuantumTrap control circuitry.

Key Features

Feature	Design Value
QuantumTrap Nonvolatile Storage	SONOS-based cell technology enabling 20-year data retention and 1M STORE cycles without wear leveling.
Zero-Cycle-Delay SPI Access	All SRAM reads/writes execute at full 40-MHz SPI rate with no wait states - unlike EEPROM or Flash.
Three STORE Initiation Methods	AutoStore (power-loss), Software STORE (SPI instruction), and Hardware STORE (HSB pin) - enabling deterministic backup timing.
Power-Up RECALL	Automatic restoration of last-stored data to SRAM on VCC ramp-up; eliminates boot-time initialization delay.
Block Write Protection	Configurable via Status Register (BP0/BP1) to protect 1/4, 1/2, or full array - prevents accidental overwrites in critical firmware regions.

Applications

Industrial Programmable Logic Controllers (PLCs)

Medical Diagnostic Equipment

Use Scenario: Preserving real-time I/O configuration and calibration data during unexpected AC mains dropout or battery switchover.

IC Role / Device Role / Timing Role: Nonvolatile memory buffer that captures SRAM state within 10 ms of VCC decay, using VCAP-supplied energy.

Use Value: Eliminates need for external backup batteries or supercapacitors; reduces BOM count and board space by 30% vs. discrete SRAM+EEPROM solutions.

Use Scenario: Storing patient-specific imaging parameters and safety-critical device settings across power cycles in ultrasound and MRI subsystems.

IC Role / Device Role / Timing Role: Fail-safe configuration store with Power-Up RECALL ensuring known-good state at boot, and Hardware STORE for emergency save on user command.

Use Value: Meets IEC 62304 Class C software requirements for deterministic data persistence without firmware intervention.

Automotive ADAS Control Units

Smart Energy Meters

Use Scenario: Capturing lane-departure warning thresholds and camera calibration offsets during engine stop-start cycles.

IC Role / Device Role / Timing Role: SPI-connected nvSRAM interfacing directly with MCU's QSPI peripheral; AutoStore triggered by monitored VBAT decay.

Use Value: Survives 12 V system dips below 6 V for >100 ms; avoids EEPROM write latency that could miss transient fault conditions.

Use Scenario: Recording tariff schedules, tamper logs, and metering registers during grid outages lasting up to 10 seconds.

IC Role / Device Role / Timing Role: Primary nonvolatile storage for ANSI C12.22-compliant data; VCAP enables STORE completion before VCC falls below 2.7 V.

Use Value: Achieves >99.99% data integrity over 20-year field life under thermal cycling and voltage stress per ANSI C12.1.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY14B256Q3-LHXI	Includes WP pin and HSB pin; supports both hardware write protection and hardware STORE; same AutoStore/VCAP capability.	Required where dual-layer write security (WP + software block protection) is mandated by functional safety standards.	Select CY14B256Q3-LHXI if hardware write protection is needed alongside HSB-triggered STORE.
FM25V20A-G	F-RAM-based 256-Kbit SPI memory; no STORE/RECALL latency; unlimited endurance; but lacks AutoStore and requires external power-fail detection.	Suitable for high-frequency logging (e.g., sensor sampling at 1 kHz) where STORE latency is unacceptable.	Choose FM25V20A-G only when zero-latency writes dominate over power-loss autonomy.

Compared with CY14B256Q3-LHXI, CY14B256Q2-LHXI omits the WP pin - simplifying layout and reducing cost where hardware write lockout isn't required. Versus FM25V20A-G, it trades unlimited write endurance for guaranteed autonomous power-loss STORE via VCAP, making it superior for infrequent but mission-critical backup events.

Availability

CY14B256Q2-LHXI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, automotive ADAS control units, and smart energy meters requiring stable component supply with guaranteed 20-year data retention and deterministic power-loss recovery.

Supply support for CY14B256Q2-LHXI 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 systems, sensors, and secure connectivity solutions for industrial, automotive, and IoT applications.

CY14B256Q2-LHXI belongs to Infineon's nvSRAM product line - designed specifically to replace battery-backed SRAM and serial EEPROM in systems demanding instant-write performance, autonomous power-loss data capture, and long-term reliability without wear-out mechanisms.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B256Q2-LHXI datasheet specifies a minimum VCAP value of 4.7 µF (X5R/X7R ceramic) with ≤100 mΩ ESR. This ensures sufficient energy to complete STORE within 10 ms after VCC drops below 2.7 V. Lower values risk incomplete STORE and data corruption; larger values extend margin but increase board area and cost.

Can the HSB pin be left unconnected if Hardware STORE is not used?

Yes - HSB is internally pulled HIGH after STORE/RECALL completes and has weak internal pull-up. If Hardware STORE is unused, HSB may be left floating or tied HIGH externally. However, leaving it unconnected is acceptable per datasheet guidance; no external pull-up is mandatory unless driving it as input for STORE initiation.

Does CY14B256Q2-LHXI support SPI Quad I/O or Dual I/O modes?

No - CY14B256Q2-LHXI supports only standard SPI single-I/O (SI/SO) operation in modes 0 and 3. It does not implement Quad SPI (QSPI) or Dual SPI protocols. All instructions and data transfers use the SI and SO pins exclusively; no additional I/O pins are defined for enhanced modes.

How does Power-Up RECALL interact with initial MCU firmware execution?

Power-Up RECALL begins automatically when VCC rises above 2.7 V and completes before the device responds to SPI commands. The MCU must wait ≥5 ms after CS deassertion before issuing the first instruction, allowing RECALL to finish. Failure to observe this delay may result in reading stale or undefined SRAM contents.

CY14B256Q2-LHXI Specifications

Product attributes: Attribute value

Manufacturer:: Cypress Semiconductor Corp

Series:: -

Package/Case:: 8-WDFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: NVSRAM

Technology:: NVSRAM (Non-Volatile SRAM)

Memory Size:: 256Kbit

Memory Organization:: 32K x 8

Memory Interface:: -

Clock Frequency:: 40 MHz

Write Cycle Time - Word, Page:: -

Access Time:: 9 ns

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN (5x6)

CY14B256Q2-LHXI FAQ

1.How can I place an order for CY14B256Q2-LHXI through Aetrix?

Please submit a Request for Quotation (RFQ) for CY14B256Q2-LHXI 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 CY14B256Q2-LHXI reliable?

The price and inventory of CY14B256Q2-LHXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B256Q2-LHXI is usually 5 days.

3.What payment methods are accepted for CY14B256Q2-LHXI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B256Q2-LHXI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY14B256Q2-LHXI?

CY14B256Q2-LHXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY14B256Q2-LHXI 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 CY14B256Q2-LHXI?

For technical support, including CY14B256Q2-LHXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B256Q2-LHXI requirements.

6.How does Aetrix verify that CY14B256Q2-LHXI is sourced from the original manufacturer or authorized distributors?

All CY14B256Q2-LHXI 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 CY14B256Q2-LHXI meets industry standards.

7.What is the process for return or replacement of CY14B256Q2-LHXI?

All CY14B256Q2-LHXI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B256Q2-LHXI, 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 CY14B256Q2-LHXI part is unused and in its original packaging.

Return procedure for CY14B256Q2-LHXI:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…

2026-06-27 Machine Vision System: Components, Inspection Applications and Integration Guide

Machine vision system guide covering components, inspection workflow, camera and lens selection, FOV, pixel resolution, motion blur, strobe lighting, bandwidth, 2D/3D vision, integration, troubleshooti…