My Inquiry
My Account
Cypress Semiconductor Corp CY14B104K-ZS25XI
- Part No.:
- CY14B104K-ZS25XI
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY14B104K-ZS25XI.pdf
- Description:
- IC NVSRAM 4MBIT PAR 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:4,706
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY14B104K-ZS25XI from Cypress Semiconductor is a 4-Mbit nonvolatile SRAM (512 K × 8) with integrated real-time clock, AutoStore capability, and watchdog timer. It operates at 3.0 V ±10%, delivers 25 ns access time, supports infinite SRAM read/write cycles, and retains data for 20 years without power. It is used in industrial control systems requiring timestamped event logging and power-loss-safe memory retention.
For engineers reviewing the CY14B104K-ZS25XI datasheet, CY14B104K-ZS25XI pinout, CY14B104K-ZS25XI application, or CY14B104K-ZS25XI equivalent, key selection considerations include RTC alarm interrupt support, VCAP-backed AutoStore timing, ×8 bus interface compatibility, and TSOP II package footprint constraints.
Technical Context
The device integrates QuantumTrap nonvolatile storage with standard SRAM architecture, enabling parallel STORE/RECALL across all 524,288 bytes. Its RTC includes leap-year tracking, programmable alarm intervals (minutes to months), and a 32.768 kHz crystal oscillator with calibration register.
Power management is implemented via dual backup paths: capacitor-based (VCAP) for AutoStore and optional battery (VRTCbat) for RTC continuity. The HSB pin serves as both hardware STORE trigger and busy indicator with open-drain output and internal 100 kΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 K × 8 organization), directly maps to 524,288-byte address space |
| Access Time | 25 ns - enables direct interfacing with legacy microcontrollers running at ≤40 MHz |
| Supply Voltage | 3.0 V +20% / –10% (2.7–3.6 V) - compatible with single-supply industrial 3.3 V rails |
| Data Retention | 20 years at TA = 85°C - ensures long-term logging integrity in unattended equipment |
| STORE Endurance | 1 million cycles to QuantumTrap - supports daily firmware state saves over 27 years |
| RTC Accuracy | ±2 ppm typical with 32.768 kHz crystal - provides sub-second drift per month in temperature-stable environments |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
Package: 44-pin Thin Small Outline Package (TSOP II), 0.8 mm pitch, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Input | 25-bit address bus for 524,288-byte addressing; A18 is valid only in ×8 mode |
| DQ0–DQ7 | Bidirectional Data I/O | 8-bit parallel data path; tristated when OE HIGH or during STORE/RECALL |
| WE | Write Enable (Active LOW) | Controls write latching; must be held HIGH during AutoStore to prevent bus contention |
| CE | Chip Enable (Active LOW) | Selects device for read/write; disables outputs and halts internal operations when HIGH |
| OE | Output Enable (Active LOW) | Enables SRAM data output drivers; HIGH forces DQ lines into high-impedance state |
| HSB | Hardware STORE Busy | Open-drain status pin: LOW = STORE in progress; externally pulled LOW to initiate hardware STORE |
| VCAP | AutoStore Capacitor Supply | Connects to 0.1 µF capacitor; supplies energy for single STORE during VCC dropout |
| VRTCcap / VRTCbat | RTC Backup Supply | Either capacitor (VRTCcap) or battery (VRTCbat) powers RTC independently of main VCC |
| Xin / Xout | RTC Crystal Interface | Drives 32.768 kHz tuning-fork crystal; Xin accepts external clock if crystal omitted |
| INT | Programmable Interrupt Output | Asserts on RTC alarm, watchdog timeout, or power monitor event; configurable active-HIGH or open-drain |
Key Features
| Feature | Design Value |
|---|---|
| Hands-off AutoStore | Automatic STORE triggered by VCC drop below VSWITCH, using charge stored on VCAP capacitor |
| Software-controlled STORE/RECALL | Initiated via specific address sequence - enables deterministic save/restore without hardware signal dependency |
| RTC with leap-year calendar | Accurate date/time tracking including February 29 handling; eliminates host MCU date logic overhead |
| Programmable alarm interrupts | Configurable for minute/hour/day/month intervals - supports scheduled wake-up or periodic logging triggers |
| Watchdog timer with reset output | Monitors system activity; asserts INT on timeout unless cleared - prevents hung-state lockup in field-deployed units |
Applications
| Industrial Data Logger | Medical Device Event Recorder |
|---|---|
|
Use Scenario: Continuous timestamped recording of sensor readings and fault events in PLC-based automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile memory + RTC co-processor - stores runtime logs and stamps each entry with accurate wall-clock time. Use Value: Eliminates need for external RTC and EEPROM; AutoStore preserves last 512 KB of log data during unexpected AC loss. |
Use Scenario: Capturing ECG waveform metadata, operator actions, and alarm timestamps in portable diagnostic devices. IC Role / Device Role / Timing Role: Power-fail-safe memory with certified time stamping - meets IEC 62304 traceability requirements for clinical data. Use Value: Ensures audit trail integrity even during battery swap; 20-year retention satisfies medical device regulatory archival mandates. |
| Smart Meter Firmware State Keeper | Telecom Base Station Configuration Manager |
|
Use Scenario: Preserving meter calibration constants, tariff tables, and tamper-event history across firmware updates and brownouts. IC Role / Device Role / Timing Role: Dual-role nvSRAM + RTC - holds volatile configuration while providing time-of-event tagging for utility billing compliance. Use Value: Prevents configuration corruption during OTA updates; RTC alarm wakes MCU for scheduled meter reading without external timer. |
Use Scenario: Storing radio parameter sets, neighbor cell lists, and uptime counters in remote LTE small cells. IC Role / Device Role / Timing Role: High-reliability memory subsystem - maintains operational state through grid fluctuations and thermal cycling. Use Value: Enables zero-downtime reconfiguration; watchdog timer resets stuck control threads without requiring baseband processor intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM+RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-NL35I | 4-Mbit nvSRAM + RTC, 35 ns access, 54-pin SOIC; no AutoStore - requires external controller for STORE initiation | Lacks hands-off power-loss STORE; relies on host MCU to detect brownout and issue software STORE | Choose when board space allows larger SOIC and host has reliable power-fail detection circuitry |
| FM31L278-G | 2-Mbit FRAM + RTC, 70 ns access, 48-pin TSSOP; unlimited STORE endurance but lower density and slower speed | No AutoStore capacitor path; uses FRAM for instant nonvolatility - no STORE latency but higher standby current | Prefer for ultra-high-cycle logging (e.g., >100k STOREs/day); avoid where 25 ns SRAM timing or 4-Mbit capacity is required |
Compared with STK14CA8-NL35I and FM31L278-G, CY14B104K-ZS25XI uniquely combines 25 ns speed, capacitor-backed AutoStore, and 4-Mbit ×8 density in a compact 44-pin TSOP II - making it optimal for space-constrained industrial controllers needing deterministic power-loss response.
Availability
CY14B104K-ZS25XI is available at Aetrix Electronics and suitable for industrial data loggers, medical event recorders, smart meter firmware state keepers, and telecom base station configuration managers requiring stable component supply and long-term lifecycle support.
Supply support for CY14B104K-ZS25XI 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 emphasis on nonvolatile memory and timing solutions.
CY14B104K-ZS25XI belongs to Cypress's QuantumTrap nvSRAM product line, engineered specifically for systems demanding simultaneous fast SRAM access, deterministic power-loss data preservation, and autonomous RTC functionality.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14B104K-ZS25XI requires a 0.1 µF ceramic capacitor between VCAP and VSS, rated for ≥16 V DC. This value ensures sufficient charge to complete one full STORE cycle when VCC drops below VSWITCH (typically 2.5 V). Using a smaller capacitor risks incomplete STORE and data corruption; tantalum or electrolytic types are not recommended due to ESR and aging effects.
Can the RTC operate independently while the SRAM is disabled?
Yes. The RTC continues running from VRTCcap or VRTCbat backup power even when VCC is absent or CE is HIGH. Its registers remain readable and writable via the same address/data bus, and alarm/watchdog interrupts remain active on the INT pin - enabling timekeeping and wake-up functions without SRAM access.
How does the device prevent unintended STORE operations during normal writes?
The CY14B104K-ZS25XI uses a write-latch mechanism: AutoStore and Hardware STORE are ignored unless at least one SRAM write has occurred since the last STORE or RECALL. Software STORE remains unconditional. This avoids unnecessary wear on QuantumTrap cells during routine memory updates.
Is the CY14B104K-ZS25XI pin-compatible with other Cypress nvSRAMs like CY14B101Q?
No. CY14B104K-ZS25XI uses a 44-pin TSOP II package with dedicated RTC pins (Xin, Xout, VRTCcap, INT), whereas CY14B101Q is a 28-pin SOIC without RTC functionality. Address/data pin counts and control signal assignments differ significantly - direct replacement requires PCB redesign and firmware adaptation.
CY14B104K-ZS25XI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 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
CY14B104K-ZS25XI FAQ
1.How can I place an order for CY14B104K-ZS25XI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B104K-ZS25XI 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 CY14B104K-ZS25XI reliable?
The price and inventory of CY14B104K-ZS25XI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B104K-ZS25XI is usually 5 days.
3.What payment methods are accepted for CY14B104K-ZS25XI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B104K-ZS25XI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B104K-ZS25XI?
CY14B104K-ZS25XI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B104K-ZS25XI 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 CY14B104K-ZS25XI?
For technical support, including CY14B104K-ZS25XI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B104K-ZS25XI requirements.
6.How does Aetrix verify that CY14B104K-ZS25XI is sourced from the original manufacturer or authorized distributors?
All CY14B104K-ZS25XI 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 CY14B104K-ZS25XI meets industry standards.
7.What is the process for return or replacement of CY14B104K-ZS25XI?
All CY14B104K-ZS25XI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B104K-ZS25XI, 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 CY14B104K-ZS25XI part is unused and in its original packaging.
Return procedure for CY14B104K-ZS25XI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY14B104K-ZS25XI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
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…
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…
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…
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…
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…
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…
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 …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
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…
