Infineon Technologies CY14B104NA-ZS45XE

Overview

CY14B104NA-ZS45XE from Cypress Semiconductor is an automotive-grade 4-Mbit (256K × 16) non-volatile SRAM with QuantumTrap technology, operating at 45 ns access time, single 3.3 V supply (+0.3 V), and –40 °C to +125 °C extended temperature range. It integrates fast SRAM with embedded nonvolatile storage, enabling automatic STORE on power-down via VCAP capacitor and software- or hardware-triggered RECALL for mission-critical data retention in engine control units and ADAS modules.

For engineers reviewing the CY14B104NA-ZS45XE datasheet, CY14B104NA-ZS45XE pinout, CY14B104NA-ZS45XE application, or CY14B104NA-ZS45XE equivalent, key selection criteria include AutoStore timing under voltage droop, HSB-driven hardware STORE arbitration, byte-enable granularity (BHE/ BLE), VCAP capacitance requirements (0.1 µF), and Automotive-E endurance rating (100K STORE cycles).

Technical Context

The device implements a dual-cell architecture: standard SRAM for high-speed read/write and parallel QuantumTrap nonvolatile elements per cell. STORE and RECALL execute in full-word parallel mode, eliminating sequential bit-line programming delays. All operations-AutoStore, hardware STORE, and software STORE-are conditional on prior SRAM write activity to prevent spurious nonvolatile writes.

Hardware STORE uses open-drain HSB pin with internal 100 kΩ pull-up and tDELAY timing window to synchronize with ongoing SRAM writes. Power-up RECALL initiates automatically when VCC exceeds VSWITCH, with HSB driven LOW for duration tHRECALL (max 20 ms), during which all memory access is inhibited.

Key Specifications

Pinout & Package

Package: 44-pin TSOP II (Type II), 12.0 mm × 20.0 mm body, 0.8 mm pitch, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar non-volatile SRAM applications.

Compared with FM24V10-G and MB85RS4MT, CY14B104NA-ZS45XE uniquely delivers parallel-interface nvSRAM with guaranteed 100K STORE cycles and 1-year data retention at +125 °C-making it the only qualified solution for powertrain and chassis control units requiring deterministic STORE timing and AEC-Q100 compliance.

Availability

CY14B104NA-ZS45XE is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, and electric power steering systems requiring stable component supply across automotive production lifecycles.

Supply support for CY14B104NA-ZS45XE 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 semiconductor solutions for automotive, industrial, and IoT applications, with deep expertise in nonvolatile memory architectures.

CY14B104NA belongs to the Automotive nvSRAM product line, engineered specifically for fail-safe data retention in safety-critical electronic control units where power interruption is common and firmware intervention cannot be assumed.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B104NA-ZS45XE requires a minimum 0.1 µF X7R ceramic capacitor between VCAP and VSS to ensure successful STORE completion during VCC dropout events lasting up to 100 µs. Lower values risk incomplete STORE and data corruption; larger values do not improve reliability but may increase board area and cost.

Can the HSB pin be left unconnected if hardware STORE is not used?

Yes-the HSB pin may be left floating if hardware STORE initiation and busy monitoring are unused. The internal 100 kΩ weak pull-up ensures HSB remains HIGH during normal operation. No external pull-up is required unless the pin is actively driven LOW by an external controller to trigger STORE.

How does the conditional STORE feature prevent unnecessary nonvolatile writes?

The CY14B104NA-ZS45XE monitors SRAM write activity using an internal latch. AutoStore and hardware STORE are suppressed unless at least one valid write cycle occurs after the most recent STORE or RECALL. This avoids wear on QuantumTrap cells during idle periods or read-only operation-extending effective endurance beyond rated 100K cycles.

Is software STORE compatible with all microcontroller families?

Yes-software STORE uses six consecutive CE- or OE-controlled read accesses to fixed addresses (e.g., 0x4E38, 0xB1C7…), requiring no special instructions or bus protocols. It works with any 16-bit MPU or microcontroller supporting standard asynchronous SRAM timing, including ARM Cortex-M, Renesas RH850, and NXP S32K series.