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Infineon Technologies CY14B256KA-SP45XIT
- Part No.:
- CY14B256KA-SP45XIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY14B256KA-SP45XIT.pdf
- Description:
- IC NVSRAM 256KBIT PAR 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,814
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Product details
Overview
CY14B256KA-SP45XIT from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) nonvolatile SRAM with integrated real-time clock, delivering 45 ns access time, infinite SRAM read/write cycles, and 1 million STORE cycles to QuantumTrap nonvolatile elements. It operates at 3.0 V ±10% over industrial temperature range and supports AutoStore on power-down using an external VCAP capacitor.
For engineers reviewing the CY14B256KA-SP45XIT datasheet, CY14B256KA-SP45XIT pinout, CY14B256KA-SP45XIT application, or CY14B256KA-SP45XIT equivalent, key selection criteria include RTC alarm interrupt capability, 0.35 µA typical RTC backup current, software/hardware STORE control, and SSOP-48 package compatibility with legacy SRAM footprints.
Technical Context
The device integrates SRAM and QuantumTrap nonvolatile storage in a single die, enabling parallel STORE/RECALL of all 32 K × 8 bytes without byte-level latency. Its RTC subsystem includes leap-year tracking, programmable alarm (minutes/hours/days/months), and watchdog timer-all backed by dual power options (VCAP or VRTCbat).
AutoStore activation relies on internal voltage monitoring: when VCC drops below VSWITCH, the chip disconnects VCAP and initiates STORE using stored charge. The HSB pin serves dual role-hardware STORE request input and open-drain busy indicator-with tHHHD timing and internal 100 kΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32 K × 8) - matches standard SRAM footprint for drop-in replacement in data logging and configuration storage. |
| Access Time | 45 ns - ensures compatibility with 22 MHz bus timing in industrial microcontroller interfaces. |
| STORE Endurance | 1 million cycles - defines maximum field-replaceable event count before nonvolatile element wear-out. |
| RTC Backup Current | 0.35 µA (typ) - enables >10-year battery life with 12 mAh coin cell in always-on timekeeping mode. |
| Operating Voltage | 3.0 V +20%, –10% - supports wide-input LDOs without external regulation overhead. |
| Data Retention | 20 years - guarantees timestamped sensor data integrity across product lifecycle without refresh. |
| Temperature Range | –40 °C to +85 °C - validated for deployment in uncontrolled industrial enclosures and outdoor metering units. |
Pinout & Package
Package: 48-pin shrink small-outline package (SSOP), RoHS-compliant, Pb-free, body width 7.5 mm, pitch 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32 Kbyte addressing without bank switching. |
| DQ0–DQ7 | Bidirectional Data I/O | 8-bit parallel interface compatible with 8-bit MCU data buses and legacy SRAM controllers. |
| WE, CE, OE | Control Inputs | Standard SRAM control signals-no glue logic required for integration with existing memory controllers. |
| HSB | I/O Busy/Request | Open-drain hardware STORE trigger and status indicator; requires no external driver for basic AutoStore use. |
| VCC, VSS | Power/Ground | Single 3V supply domain simplifies PCB power routing; VSS shared between SRAM and RTC sections. |
| VCAP | AutoStore Capacitor Supply | Internal regulator charges external capacitor; size defined by tSTORE timing-0.1 µF typical per datasheet. |
| VRTCcap / VRTCbat | RTC Backup Source | Dual-select RTC power: capacitor for short-term brownout hold-up, battery for long-term timekeeping during main power loss. |
| INT | Programmable Interrupt Output | Configurable active-HIGH push-pull or active-LOW open-drain output for alarm/watchdog/power monitor events. |
Key Features
| Feature | Design Value |
|---|---|
| QuantumTrap Nonvolatile Storage | Enables infinite SRAM read/write cycles while preserving data across unlimited power cycles-no wear leveling firmware needed. |
| AutoStore on Power-Down | Eliminates external power-fail detection circuitry; stores last valid state automatically using only a 0.1 µF capacitor on VCAP. |
| Integrated RTC with Alarm & Watchdog | Reduces BOM count by replacing discrete RTC + timer ICs; alarm interrupts support scheduled wake-up or maintenance alerts. |
| Software/Hardware STORE Control | Allows deterministic STORE initiation via address sequence (no control pin toggling) or HSB pin assertion-enabling both autonomous and host-synchronized save operations. |
| RTC Backup Flexibility | Supports either low-leakage supercapacitor (VCAP) or lithium coin cell (VRTCbat), letting designers optimize for cost, size, or 10+ year runtime. |
Applications
| Industrial Data Logger | Smart Energy Meter |
|---|---|
Use Scenario: Continuous acquisition of voltage, current, and temperature readings in remote substations with intermittent communication. IC Role / Device Role / Timing Role: Nonvolatile memory buffer + time-stamping engine; RTC provides accurate UTC-aligned timestamps for each logged record. Use Value: Ensures zero data loss during grid outages via AutoStore, while 20-year data retention meets utility regulatory archiving requirements. | Use Scenario: Residential electricity meter recording consumption every 15 minutes and maintaining tamper-proof billing history. IC Role / Device Role / Timing Role: Secure configuration storage and time-of-use tariff tracking; alarm interrupt triggers daily energy reset and secure log rotation. Use Value: Eliminates separate RTC and EEPROM, reducing bill-of-materials and board area while guaranteeing timestamp integrity under battery-only operation. |
| PLC Configuration Module | Medical Diagnostic Device |
Use Scenario: Storing ladder logic parameters, calibration offsets, and fault history in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Persistent parameter store with power-cycle resilience; watchdog timer monitors firmware execution and forces safe shutdown on hang. Use Value: Prevents configuration corruption during unexpected power loss, enabling immediate operational recovery without manual reprogramming. | Use Scenario: Portable ultrasound or ECG unit capturing patient waveforms and session metadata during battery-powered operation. IC Role / Device Role / Timing Role: Volatile waveform buffer with guaranteed save-on-power-loss; RTC maintains session timestamps even when main battery is depleted. Use Value: Meets IEC 62304 data persistence requirements by ensuring clinical data survives sudden power removal during critical acquisitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM + RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-350I5F | 256 Kbit nvSRAM + RTC; 35 ns access; uses NVSRAM technology (not QuantumTrap); 10-year data retention. | Lacks AutoStore-requires external power-fail detection and control logic for STORE initiation. | Select when lower-cost qualification path is prioritized over hands-off power-loss protection. |
| FM24V10-G | 1 Mbit F-RAM with integrated RTC; 55 ns access; unlimited endurance; no STORE/RECALL latency. | No AutoStore or HSB pin-RTC backup is separate; F-RAM write speed eliminates STORE timing constraints. | Select when high-frequency parameter updates (>1 kHz) demand true write-through behavior without STORE overhead. |
Compared with STK14CA8-350I5F and FM24V10-G, CY14B256KA-SP45XIT uniquely combines deterministic AutoStore, hardware STORE signaling via HSB, and 20-year retention-making it optimal for systems where guaranteed last-state preservation during uncontrolled power loss is mandatory.
Availability
CY14B256KA-SP45XIT is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, PLC configuration modules, and medical diagnostic devices requiring stable component supply and long-term lifecycle support.
Supply support for CY14B256KA-SP45XIT 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, industrial, and IoT solutions.
This part belongs to Infineon's nvSRAM product line-designed specifically for mission-critical applications demanding zero-data-loss memory persistence alongside precise timekeeping in harsh power environments.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14B256KA-SP45XIT requires a minimum 0.1 µF ceramic capacitor on the VCAP pin to ensure successful AutoStore during VCC dropout. This value is derived from tSTORE timing (max 20 ms) and internal current draw (100 µA typical). Larger values extend hold-up time but do not improve reliability beyond datasheet-specified 0.1 µF.
Can the RTC operate independently while the SRAM is disabled?
Yes-the RTC continues running from VRTCcap or VRTCbat even when VCC is absent or the SRAM is deselected. The RTC oscillator, alarm, and watchdog functions remain fully active and generate interrupts on INT, provided backup power is present and the RTC is enabled via register configuration.
How does the HSB pin behave during a Software STORE sequence?
During a Software STORE, the HSB pin is driven LOW by the device for the duration of the STORE operation (tSTORE ≈ 20 ms), then returns HIGH. Unlike Hardware STORE, no external pull-down is needed-software initiation alone triggers the same busy signaling and post-STORE delay (tLZHSB) before SRAM access resumes.
Is the CY14B256KA-SP45XIT pin-compatible with earlier CY14B256K variants?
Yes-CY14B256KA-SP45XIT is functionally and mechanically identical to CY14B256KA-SP25XI and CY14B256KA-SP35XI in the same SSOP-48 package. Only access time differs (45 ns vs. 25/35 ns); all pin assignments, control logic, register maps, and RTC features are fully compatible.
CY14B256KA-SP45XIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 45ns
- Access Time:
- 45 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
CY14B256KA-SP45XIT FAQ
1.How can I place an order for CY14B256KA-SP45XIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B256KA-SP45XIT 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 CY14B256KA-SP45XIT reliable?
The price and inventory of CY14B256KA-SP45XIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B256KA-SP45XIT is usually 5 days.
3.What payment methods are accepted for CY14B256KA-SP45XIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B256KA-SP45XIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B256KA-SP45XIT?
CY14B256KA-SP45XIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B256KA-SP45XIT 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 CY14B256KA-SP45XIT?
For technical support, including CY14B256KA-SP45XIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B256KA-SP45XIT requirements.
6.How does Aetrix verify that CY14B256KA-SP45XIT is sourced from the original manufacturer or authorized distributors?
All CY14B256KA-SP45XIT 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 CY14B256KA-SP45XIT meets industry standards.
7.What is the process for return or replacement of CY14B256KA-SP45XIT?
All CY14B256KA-SP45XIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14B256KA-SP45XIT, 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 CY14B256KA-SP45XIT part is unused and in its original packaging.
Return procedure for CY14B256KA-SP45XIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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