Infineon Technologies CY14B101NA-ZS45XI

Overview

CY14B101NA-ZS45XI from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM organized as 64 K × 16, featuring QuantumTrap nonvolatile storage, 45 ns access time, single 3.0 V ±10% supply, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using VCAP-supplied energy and supports software/hardware-initiated STORE/RECALL for mission-critical data retention in real-time control systems.

For engineers reviewing the CY14B101NA-ZS45XI datasheet, CY14B101NA-ZS45XI pinout, CY14B101NA-ZS45XI application, or CY14B101NA-ZS45XI equivalent, key selection criteria include ×16 bus interface support, HSB-controlled hardware STORE timing, VCAP capacitor sizing (22 µF recommended), and compatibility with legacy SRAM-based microcontroller memory maps requiring nonvolatile persistence without external backup controllers.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous STORE/RECALL across all 65,536 words. The architecture decouples volatile read/write (infinite cycles) from nonvolatile STORE endurance (1 million cycles) and guarantees 20-year data retention without refresh.

AutoStore triggers when VCC drops below VSWITCH (~2.7 V), disconnecting VCAP from VCC and powering internal STORE logic. Hardware STORE is initiated by pulling HSB low, while software STORE uses a specific address sequence - both inhibit SRAM access until completion, with HSB signaling busy status via open-drain output.

Key Specifications

Pinout & Package

The CY14B101NA-ZS45XI is packaged in a 44-pin Thin Small Outline Package (TSOP II), Type II, with 0.8 mm pitch and 12.0 mm × 18.4 mm body size. Pin 1 is marked by a notch or dot; pin numbering proceeds counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and MB85RS1MT-FPN-GE1, CY14B101NA-ZS45XI uniquely delivers ×16 parallel interface, deterministic 45 ns SRAM timing, and 20-year retention - making it irreplaceable in legacy industrial controllers requiring drop-in nvSRAM replacement with zero firmware changes.

Availability

CY14B101NA-ZS45XI is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, avionics black boxes, and smart grid RTUs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY14B101NA-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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and memory solutions with emphasis on reliability and industrial longevity.

CY14B101NA belongs to Infineon's nvSRAM product line, designed specifically for applications demanding SRAM-speed access with EEPROM-level nonvolatility - targeting industrial automation, medical devices, and aerospace systems where data integrity during power loss is non-negotiable.

FAQ

What is the minimum VCAP capacitor value required for reliable AutoStore operation?

The CY14B101NA-ZS45XI requires a minimum 22 µF tantalum or low-ESR ceramic capacitor on the VCAP pin to guarantee successful STORE during worst-case VCC dropout profiles. Using less than 22 µF risks incomplete STORE and data corruption; values above 47 µF are acceptable but offer diminishing returns in hold-up time.

Does CY14B101NA-ZS45XI support both ×8 and ×16 configurations?

No - CY14B101NA is fixed at 64 K × 16 organization (1 Mbit total), with A0–A15 address lines and DQ0–DQ15 data bus. The ×8 variant is the CY14B101LA (128 K × 8). Pinout, timing, and byte-enable logic (BHE/ BLE) are optimized exclusively for 16-bit operation.

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

Yes - HSB may be left floating or tied HIGH via 10 kΩ pull-up if hardware STORE is unused. However, the pin must never be driven HIGH actively (e.g., by MCU GPIO), as this conflicts with its open-drain output behavior during STORE. Leaving it unconnected is safe only if software STORE and AutoStore fully meet system requirements.

Is CY14B101NA-ZS45XI compatible with standard SRAM timing controllers?

Yes - it adheres to JEDEC-standard SRAM timing: CE/ OE/ WE setup/hold times match industry-wide 3.3 V SRAM controllers. No special timing generator or protocol translation is needed; it functions as a pin-and-cycle-compatible replacement for 64 K × 16 volatile SRAMs, with STORE/RECALL operating transparently in background.