Infineon Technologies CY14MB064Q2B-SXIT

Overview

CY14MB064Q2B-SXIT from Infineon Technologies (formerly Cypress) is a 64-Kbit (8K × 8) serial SPI nonvolatile SRAM with integrated QuantumTrap nonvolatile storage, designed for high-reliability data retention in power-loss scenarios. It supports AutoStore on power-down via VCAP capacitor, Software STORE/RECALL via SPI, and operates at up to 40 MHz with zero-cycle-delay reads/writes across industrial temperature range (–40°C to +85°C).

For engineers reviewing the CY14MB064Q2B-SXIT datasheet, CY14MB064Q2B-SXIT pinout, CY14MB064Q2B-SXIT application, or CY14MB064Q2B-SXIT equivalent, key selection criteria include AutoStore capability, SPI mode 0/3 compatibility, hardware write protection absence (no WP pin), 2.7–3.6 V supply, and 20-year data retention at 85°C.

Technical Context

The CY14MB064Q2B-SXIT integrates an 8K × 8 SRAM array with per-cell QuantumTrap nonvolatile elements based on SONOS technology, enabling infinite SRAM read/write cycles while supporting 1 million STORE cycles to nonvolatile storage. Its SPI interface functions as a slave device with full support for modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1).

Power-loss data preservation relies on external VCAP capacitor charging during normal operation; when VCC drops below VSWITCH, the device initiates conditional AutoStore - skipping if no writes occurred since last STORE/RECALL. Software-controlled STORE and RECALL operations are executed via dedicated SPI opcodes and block memory access during execution, signaled by RDY bit in status register.

Key Specifications

Pinout & Package

8-pin SOIC (Small Outline Integrated Circuit) package, RoHS-compliant, surface-mountable with standard 1.27 mm pitch. Pin 1 marked via notch or dot; top view orientation per JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14MB064Q1B-SXIT, this part adds autonomous power-loss protection; versus FM25V05-G, it trades unlimited write cycles for guaranteed two-decade data hold - critical for infrastructure and medical deployments.

Availability

CY14MB064Q2B-SXIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, automotive telematics black box recording, and smart meter firmware state backup requiring stable component supply and long-lifecycle assurance.

Supply support for CY14MB064Q2B-SXIT 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 security solutions.

This device belongs to Infineon's nvSRAM product line, engineered specifically for applications demanding both high-speed SRAM performance and fail-safe nonvolatile data retention without batteries or external supervision.

FAQ

What is the function of the VCAP pin on CY14MB064Q2B-SXIT?

The VCAP pin connects to an external capacitor that supplies hold-up energy during VCC collapse, enabling automatic STORE of SRAM contents to QuantumTrap nonvolatile cells. It must never be grounded or left floating - if unused, it must be left as No Connect. Charging occurs from VCC during normal operation; discharge through internal circuitry triggers STORE when VCC falls below VSWITCH (~2.0 V).

Does CY14MB064Q2B-SXIT support hardware write protection?

No - unlike the Q1B variant, CY14MB064Q2B-SXIT omits the WP pin and does not support hardware write protection. Write security is implemented exclusively via software methods: Write Disable (WRDI) instruction and block protection bits (BP0/BP1) in the status register, which can lock 1/4, 1/2, or the full memory array against accidental overwrite.

How does AutoStore differ from Software STORE in terms of timing and reliability?

AutoStore initiates automatically within microseconds of VCC crossing VSWITCH and completes within 20 ms using VCAP energy; it is conditional - skipped if no SRAM writes occurred since last STORE/RECALL. Software STORE executes synchronously upon SPI command receipt, always proceeds regardless of write history, and takes ~15 ms. Both use identical QuantumTrap programming, ensuring equal reliability and endurance impact.

Can CY14MB064Q2B-SXIT be used in SPI mode 1 or 2?

No - the device explicitly supports only SPI modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), as confirmed in the functional description and AC switching characteristics table. Attempting mode 1 or 2 will result in misaligned sampling and corrupted data transfers due to incompatible clock polarity and phase relationships with SI/SO timing requirements.