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Infineon Technologies CY14B108K-ZS45XI
- Part No.:
- CY14B108K-ZS45XI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY14B108K-ZS45XI.pdf
- Description:
- IC NVSRAM 8MBIT PAR 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:237
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Product details
Overview
CY14B108K-ZS45XI from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) with integrated real-time clock (RTC), organized as 1024 K × 8, featuring 45 ns access time, single 3.0 V (+20%, –10%) supply operation, and QuantumTrap nonvolatile storage technology. It performs automatic STORE on power-down using a VCAP capacitor, supports software/hardware STORE/RECALL, and includes watchdog timer and programmable clock alarm - deployed in industrial control loggers requiring persistent timestamped data without battery backup.
For engineers reviewing the CY14B108K-ZS45XI datasheet, CY14B108K-ZS45XI pinout, CY14B108K-ZS45XI application, or CY14B108K-ZS45XI equivalent, key selection criteria include nvSRAM ×8 organization, RTC interrupt capability (INT pin), AutoStore timing dependency on VCAP capacitance, and compatibility with 3.0 V microcontroller buses requiring deterministic STORE latency and 20-year data retention.
Technical Context
The device integrates SRAM and QuantumTrap nonvolatile elements in a monolithic die, enabling parallel STORE/RECALL across all 1,048,576 bytes. STORE is triggered by power loss (via VCAP discharge), HSB pin assertion, or software command; RECALL occurs automatically at power-up or via software.
RTC functionality includes leap-year-corrected calendar, 32.768 kHz crystal oscillator (Xin/Xout), programmable alarm (minutes/hours/days/months), and watchdog timer with interrupt output on INT pin. Backup is supported either by capacitor (VRTCcap) or battery (VRTCbat), but not both simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1024 K × 8 configuration) |
| Access Time | 45 ns - defines maximum SRAM read/write cycle time under 3.0 V, VCC ≥ 2.7 V |
| Nonvolatile Endurance | 1 million STORE cycles - limits total number of times data can be saved to QuantumTrap cells |
| Data Retention | 20 years at TA ≤ 85°C - guaranteed nonvolatile data hold without power or refresh |
| RTC Accuracy | ±20 ppm typical - determines long-term timekeeping drift with 32.768 kHz crystal |
| Supply Voltage | 3.0 V +20%, –10% (2.7 V to 3.6 V) - defines valid operating range for SRAM and RTC logic |
| Operating Temperature | –40°C to +85°C - specifies full functionality range for industrial environments |
Pinout & Package
Package: 44-pin Thin Small Outline Package (TSOP II), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Input | Selects one of 1,048,576 bytes in ×8 mode; A19 used only in ×8 configuration |
| DQ0–DQ7 | Bidirectional Data I/O | 8-bit data bus for read/write; tristated when OE HIGH or during STORE/RECALL |
| WE, CE, OE | Control Inputs | Active-low write enable, chip enable, and output enable - standard SRAM interface timing |
| HSB | Hardware STORE Busy | Open-drain status output (LOW = busy); also accepts LOW pulse to initiate hardware STORE |
| VCAP | AutoStore Capacitor Supply | Connects external capacitor (12 µF typical) to sustain STORE during VCC dropout |
| INT | Programmable Interrupt Output | Signals RTC alarm, watchdog timeout, or power monitor event; configurable active-HIGH or open-drain |
| Xin / Xout | RTC Crystal Interface | Drives 32.768 kHz tuning-fork crystal; Xin is input, Xout is buffered output |
| VRTCcap / VRTCbat | RTC Backup Supply | Separate pins for capacitor or battery RTC backup - only one may be connected |
Key Features
| Feature | Design Value |
|---|---|
| Hands-off AutoStore | Eliminates need for external power-fail detection circuitry; uses internal VCAP monitoring and charge hold |
| QuantumTrap Nonvolatility | Enables infinite SRAM read/write cycles while limiting STORE endurance to 1M cycles - decouples volatility handling from memory access |
| Integrated RTC with Alarm | Provides timestamping, periodic wake-up, and system-level event scheduling without external RTC IC or firmware overhead |
| Watchdog Timer | Hardware-based reset supervision with programmable timeout - prevents firmware lockup in unattended systems |
| Flexible RTC Backup | Supports either low-cost capacitor (VRTCcap) or long-life battery (VRTCbat), simplifying BOM and field maintenance |
Applications
| Industrial Data Logger | Smart Metering Endpoint |
|---|---|
|
Use Scenario: Continuous recording of sensor readings and timestamps during mains power interruption. IC Role / Device Role / Timing Role: nvSRAM retains volatile logging buffer; RTC maintains accurate time-of-event stamp during outage. Use Value: Eliminates supercapacitor/battery management circuitry while guaranteeing 20-year timestamp integrity and seamless STORE/RECALL handoff. |
Use Scenario: Utility meter storing consumption intervals and tamper events with legally traceable timestamps. IC Role / Device Role / Timing Role: Acts as secure, battery-free time-stamped memory; RTC alarm triggers monthly billing data capture. Use Value: Meets IEC 62053-21 accuracy requirements with ±20 ppm RTC drift and eliminates RTC battery replacement in sealed meters. |
| PLC Controller Module | Medical Diagnostic Recorder |
|
Use Scenario: Preserving ladder logic state and I/O history during unexpected AC loss in factory automation. IC Role / Device Role / Timing Role: Stores last known operational state and cycle count; watchdog timer resets stalled control tasks. Use Value: Enables deterministic recovery within <100 ms after power restoration, meeting IEC 61131-2 restart timing constraints. |
Use Scenario: Capturing ECG waveforms with precise onset timing during portable device battery depletion. IC Role / Device Role / Timing Role: Buffers waveform data in SRAM; RTC tags each sample group with clinical-grade timestamp. Use Value: Satisfies FDA 21 CFR Part 11 audit-trail requirements via hardware-enforced time stamping and nonvolatile recall on boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM with RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK15C88-45I | 45 ns access, 8-Mbit ×8 nvSRAM + RTC, but uses older SONOS nonvolatile tech; no watchdog timer | Lacks programmable alarm and watchdog - requires external supervisor IC for fail-safe recovery | Choose if legacy footprint compatibility is critical and watchdog/alarms are handled externally |
| FM31L278-G | Low-power 8-Mbit FRAM + RTC; unlimited STORE endurance, but 100 ns access time and no AutoStore on VCC drop | Requires external power-fail detection and control logic to initiate store - increases design complexity | Prefer for ultra-high STORE-cycle applications where latency tolerance >100 ns exists |
Compared with STK15C88-45I and FM31L278-G, CY14B108K-ZS45XI uniquely combines 45 ns SRAM speed, hands-off AutoStore, integrated watchdog, and alarm - reducing external component count and firmware overhead in time-critical industrial recorders.
Availability
CY14B108K-ZS45XI is available at Aetrix Electronics and suitable for industrial data loggers, smart metering endpoints, and PLC controller modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSOP packaging.
Supply support for CY14B108K-ZS45XI 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
Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability mixed-signal ICs for industrial, automotive, and IoT applications, with expertise in nonvolatile memory and timing solutions.
CY14B108K belongs to Cypress's nvSRAM product line, engineered to replace battery-backed SRAM in mission-critical systems where maintenance-free, long-retention, and deterministic STORE/RECALL are mandatory.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14B108K-ZS45XI requires a minimum 12 µF tantalum or polymer capacitor on VCAP to ensure successful STORE during VCC dropout from 3.0 V to VSWITCH (2.0 V). Lower values risk incomplete STORE and data corruption; derating to 15 µF is recommended for temperature and aging margin.
Can the RTC operate independently when the SRAM is disabled?
Yes - the RTC continues running from VRTCcap or VRTCbat backup power even when VCC is absent or CE is deasserted. The RTC oscillator, calendar, alarm, and watchdog remain fully functional as long as valid backup voltage is applied to its dedicated supply pin.
Is the CY14B108K-ZS45XI pin-compatible with the CY14B108M variant?
No - CY14B108K (×8) and CY14B108M (×16) differ in address/data pin mapping: K uses A0–A19 and DQ0–DQ7; M uses A0–A18 and DQ0–DQ15 with BHE/BLE. Their 44-pin TSOP footprints are identical, but signal assignments and memory addressing are incompatible without PCB redesign.
Does the AutoStore Disable feature function per the datasheet?
No - the AutoStore Disable feature is nonfunctional per Errata on page 33 of Document 001-47378 Rev. *N. Workaround requires external hardware control of HSB or use of software STORE only; capacitor-based AutoStore remains enabled by default and cannot be disabled in silicon.
CY14B108K-ZS45XI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M 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:
- 44-TSOP II
CY14B108K-ZS45XI FAQ
1.How can I place an order for CY14B108K-ZS45XI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B108K-ZS45XI 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 CY14B108K-ZS45XI reliable?
The price and inventory of CY14B108K-ZS45XI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B108K-ZS45XI is usually 5 days.
3.What payment methods are accepted for CY14B108K-ZS45XI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B108K-ZS45XI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B108K-ZS45XI?
CY14B108K-ZS45XI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B108K-ZS45XI 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 CY14B108K-ZS45XI?
For technical support, including CY14B108K-ZS45XI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B108K-ZS45XI requirements.
6.How does Aetrix verify that CY14B108K-ZS45XI is sourced from the original manufacturer or authorized distributors?
All CY14B108K-ZS45XI 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 CY14B108K-ZS45XI meets industry standards.
7.What is the process for return or replacement of CY14B108K-ZS45XI?
All CY14B108K-ZS45XI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B108K-ZS45XI, 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 CY14B108K-ZS45XI part is unused and in its original packaging.
Return procedure for CY14B108K-ZS45XI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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