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Infineon Technologies CY14ME064Q1B-SXIT
- Part No.:
- CY14ME064Q1B-SXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY14ME064Q1B-SXIT.pdf
- Description:
- IC NVSRAM 64KBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,018
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Product details
Overview
CY14ME064Q1B from Infineon Technologies (formerly Cypress) is a 64-Kbit (8K × 8) SPI nonvolatile SRAM with integrated QuantumTrap nonvolatile storage, designed for fail-safe data retention in power-loss scenarios. It operates at 4.5–5.5 V, supports 40-MHz SPI interface (modes 0 and 3), delivers zero-cycle-delay reads/writes, and enables automatic STORE on power-down via external VCAP capacitor. Used in industrial PLCs, metering systems, and real-time control units where deterministic data persistence is critical.
For engineers reviewing the CY14ME064Q1B datasheet, CY14ME064Q1B pinout, CY14ME064Q1B application, or CY14ME064Q1B equivalent, key selection considerations include AutoStore capacitor sizing, WP pin hardware write protection, SPI mode compatibility, VCC voltage range compliance, and 20-year data retention at 85 °C.
Technical Context
The CY14ME064Q1B integrates an 8K × 8 SRAM array with per-cell QuantumTrap nonvolatile elements based on SONOS technology, enabling infinite SRAM read/write cycles while guaranteeing 1 million STORE cycles and 20-year data retention at 85 °C. Its SPI slave interface supports full-duplex communication at up to 40 MHz with zero cycle delay for standard READ/WRITE operations.
STORE and RECALL are implemented as atomic operations: AutoStore triggers on VCC drop below VSWITCH using energy stored in the VCAP capacitor, while Software STORE/RECALL are initiated via dedicated SPI opcodes (0x7C/0x77). The device uses a status register (RDSR/WRSR) with RDY bit to indicate busy state during nonvolatile transfers, and supports hardware (WP pin) and software (WRDI, BP0/BP1 bits) write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8K × 8), directly addressable SRAM array with concurrent nonvolatile backup |
| Supply voltage | 4.5 V to 5.5 V - mandates compatible 5-V system rail; excludes 3.3-V logic domains without level shifting |
| SPI clock rate | Up to 40 MHz - enables sub-250 ns per byte transfer; zero-cycle-delay timing eliminates wait states |
| Data retention | 20 years at 85 °C - validated endurance for industrial temperature-class deployments |
| STORE endurance | 1 million cycles to QuantumTrap - defines maximum safe power-loss events over product lifetime |
| Standby current | 120 µA - sets baseline power budget for low-duty-cycle monitoring applications |
| Sleep current | 8 µA - enables ultra-low-power suspend states during extended idle periods |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; high state forces device into 120 µA standby mode - used for bus arbitration and power gating |
| SCK | Serial clock input | Edge-triggered SPI clock (rising edge latches SI, falling edge drives SO); max 40 MHz - defines interface bandwidth ceiling |
| SI | Serial input | Accepts all SPI opcodes (READ, WRITE, STORE, RECALL, WRSR, etc.) and address/data - sole command ingestion path |
| SO | Serial output | Drives read data, status register contents, serial number, and device ID - open-drain capable for wired-OR bus sharing |
| WP | Hardware write protect input | Low-active pin that locks entire memory array against accidental writes - requires external pull-up for default-enable operation |
| HOLD | Communication suspend input | Pauses ongoing SPI transaction without resetting internal state - enables priority interrupt handling in host MCU |
| VCAP | AutoStore capacitor connection | Connects external capacitor (typ. 4.7–10 µF) to sustain STORE during VCC collapse - must not be grounded or left floating |
| VSS | Ground reference | Signal and power return path; decoupling capacitor required between VCC and VSS near package |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power-down | Guarantees data persistence without host intervention when VCC drops below VSWITCH, using energy from external VCAP capacitor |
| Software STORE/RECALL | Enables deterministic, host-controlled nonvolatile transfers via SPI opcodes 0x7C and 0x77 - critical for scheduled save points |
| Hardware write protection (WP) | Physically disables all write operations including STORE/RECALL when WP = LOW - prevents corruption during firmware updates |
| Block protection (BP0/BP1) | Configurable 1/4, 1/2, or full-array lock via status register - isolates configuration sectors from runtime code writes |
| 8-byte unique serial number | Factory-programmed, read-only identifier (RDSN instruction) - supports device traceability and license binding |
Applications
| Industrial Programmable Logic Controllers | Smart Electricity Meters |
|---|---|
Use Scenario: Retaining ladder logic state, I/O mapping, and calibration coefficients across uncontrolled AC mains outages. IC Role / Device Role / Timing Role: Nonvolatile scratchpad memory with microsecond-scale STORE latency and zero-read latency - replaces battery-backed SRAM. Use Value: Eliminates battery replacement service cycles and avoids data loss during brownouts lasting <100 ms, verified at 85 °C ambient. | Use Scenario: Securing tariff tables, consumption registers, and tamper-event logs during grid instability or physical disconnect. IC Role / Device Role / Timing Role: Fail-safe parameter store interfaced directly to metrology SoC via 40-MHz SPI - no glue logic required. Use Value: Achieves Class 0.5 accuracy compliance by preserving billing-critical data through >1M STORE cycles over 15-year field life. |
| Medical Diagnostic Equipment | Automotive Body Control Modules |
Use Scenario: Capturing last-known sensor fusion parameters and diagnostic fault codes before emergency shutdown. IC Role / Device Role / Timing Role: Deterministic nonvolatile buffer synchronized to safety-critical watchdog timeout - stores context within 5 ms of VCC decay. Use Value: Meets IEC 62304 SW safety Class C requirements by ensuring post-failure analysis data survives power interruption. | Use Scenario: Preserving window position, mirror angle, seat memory, and lighting profiles across ignition cycles and battery disconnection. IC Role / Device Role / Timing Role: Automotive-grade (AEC-Q100 qualified) nvSRAM with 5-V tolerant interface - interfaces natively to 5-V CAN/LIN subsystems. Use Value: Enables OEM personalization features without EEPROM wear-out concerns or FRAM cost premium. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile serial memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FM25V05-G | F-RAM-based; 512-Kbit density; 3.0–3.6 V supply; no VCAP or AutoStore required | Battery-free operation; lower write energy; unsuitable for 5-V systems without level shifters | Select when system operates at 3.3 V and requires unlimited write endurance without power-loss circuitry |
| AT25DF041A-SSH-T | Serial NOR Flash; 4-Mbit density; 2.7–3.6 V; page-program and sector-erase architecture | Requires explicit erase-before-write; 100K program/erase cycles; no automatic power-loss capture | Select when code storage dominates and infrequent parameter updates justify erase latency and endurance limits |
Compared with FM25V05-G and AT25DF041A-SSH-T, CY14ME064Q1B uniquely combines 5-V operation, hardware AutoStore with VCAP, and true SRAM-like zero-latency access - making it optimal for real-time systems requiring guaranteed power-loss data capture without host CPU involvement.
Availability
CY14ME064Q1B is available at Aetrix Electronics and suitable for industrial automation, smart metering, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for CY14ME064Q1B 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, sensing, connectivity, and security solutions for industrial, automotive, and IoT markets.
CY14ME064Q1B belongs to Infineon's nvSRAM product line, engineered specifically to replace battery-backed SRAM and legacy EEPROM in mission-critical data logging applications demanding instant-write capability and unconditional power-loss resilience.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14ME064Q1B datasheet specifies a minimum VCAP value of 4.7 µF for guaranteed AutoStore functionality across the full industrial temperature range and worst-case VCC dropout profile. A 10 µF X7R ceramic capacitor is recommended to accommodate aging, tolerance, and ESR effects. VCAP must be placed within 5 mm of the VCAP pin and referenced to VSS with low-inductance layout.
Can CY14ME064Q1B operate in SPI mode 1 or mode 2?
No. CY14ME064Q1B only supports SPI modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Functional Description and AC Switching Characteristics sections of the official datasheet. Attempting mode 1 or 2 will result in misaligned sampling and corrupted data transfers due to incompatible clock phase/polarity timing.
How does hardware write protection via the WP pin interact with software write disable (WRDI)?
WP pin assertion (LOW) takes precedence over all software controls: it globally inhibits WRITE, STORE, WRSR, and other modifying instructions regardless of WRDI status or BP bits. WRDI only blocks writes when WP is HIGH; once WP goes LOW, WRDI becomes irrelevant until WP returns HIGH. This hierarchy ensures fail-safe protection during power transitions or firmware faults.
Is the 8-byte serial number factory-programmed and permanently locked?
Yes. The 8-byte serial number is laser-trimmed during final test and stored in one-time-programmable (OTP) memory. It is readable via RDSN instruction but cannot be altered, erased, or reprogrammed in-system or at any point in the device's lifecycle - providing immutable device identity for traceability and anti-counterfeiting.
CY14ME064Q1B-SXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
CY14ME064Q1B-SXIT FAQ
1.How can I place an order for CY14ME064Q1B-SXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14ME064Q1B-SXIT 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 CY14ME064Q1B-SXIT reliable?
The price and inventory of CY14ME064Q1B-SXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14ME064Q1B-SXIT is usually 5 days.
3.What payment methods are accepted for CY14ME064Q1B-SXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14ME064Q1B-SXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14ME064Q1B-SXIT?
CY14ME064Q1B-SXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14ME064Q1B-SXIT 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 CY14ME064Q1B-SXIT?
For technical support, including CY14ME064Q1B-SXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14ME064Q1B-SXIT requirements.
6.How does Aetrix verify that CY14ME064Q1B-SXIT is sourced from the original manufacturer or authorized distributors?
All CY14ME064Q1B-SXIT 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 CY14ME064Q1B-SXIT meets industry standards.
7.What is the process for return or replacement of CY14ME064Q1B-SXIT?
All CY14ME064Q1B-SXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14ME064Q1B-SXIT, 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 CY14ME064Q1B-SXIT part is unused and in its original packaging.
Return procedure for CY14ME064Q1B-SXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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