Infineon Technologies CY14B104L-ZS20XCT

Overview

CY14B104L-ZS20XCT from Cypress Semiconductor is a 4 Mbit (512K × 8) nonvolatile SRAM with QuantumTrap® technology, operating at 3V ±10%, 20 ns access time, and supporting automatic STORE on power loss via VCAP capacitor. It functions as a drop-in SRAM replacement in systems requiring persistent data retention without external backup power-used in industrial PLCs, medical data loggers, and telecom control cards.

For engineers reviewing the CY14B104L-ZS20XCT datasheet, CY14B104L-ZS20XCT pinout, CY14B104L-ZS20XCT application, or CY14B104L-ZS20XCT equivalent, key selection criteria include x8 bus width compatibility, HSB-driven hardware store control, VCAP-based AutoStore timing, and 200,000 STORE cycle endurance under industrial temperature range.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous infinite SRAM read/write cycles and deterministic STORE/RECALL operations. The device supports three STORE initiation methods: AutoStore on VCC dropout (triggered below VSWITCH), software-address-sequence STORE (six-cycle CE-read sequence), and hardware STORE via HSB pin assertion.

During STORE, SRAM access is inhibited for tSTORE (~10 ms typical); during RECALL, outputs remain high-Z until completion (tHRECALL ~10 ms). The HSB pin serves dual role: open-drain status indicator (LOW during STORE/RECALL) and active-LOW trigger input, with internal weak pull-up when unconnected.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (7 mm × 10 mm, 0.8 mm pitch), RoHS-compliant, suitable for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14CA8-3LF35I and FM24V10-G, CY14B104L-ZS20XCT uniquely delivers parallel x8 SRAM compatibility, deterministic hardware-initiated STORE via HSB, and integrated VCAP-based AutoStore - making it optimal for real-time industrial controllers needing sub-20 ns access and fail-safe state capture.

Availability

CY14B104L-ZS20XCT is available at Aetrix Electronics and suitable for industrial data loggers, telecom base station controllers, medical infusion pumps, and programmable logic controllers requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for CY14B104L-ZS20XCT 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 memory and programmable solutions for industrial, automotive, and communications markets.

CY14B104L belongs to the nvSRAM product line engineered specifically for systems demanding SRAM-speed operation with EEPROM-level data persistence - targeting applications where power interruption must not compromise operational state or audit records.

FAQ

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

The CY14B104L-ZS20XCT requires a 0.1 µF ±20% X7R ceramic capacitor connected between VCAP and VSS. This value is specified in the DC Electrical Characteristics table (page 7 of Rev. *L datasheet) and ensures sufficient charge to complete one full STORE cycle when VCC drops below VSWITCH (typically 2.7 V). Larger capacitors do not extend STORE capability beyond one cycle but improve margin against rapid VCC collapse.

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

Yes - the HSB pin has an internal weak pull-up resistor and may be left floating if hardware STORE triggering and busy indication are unused. However, it must not be tied LOW or driven actively without intention to initiate STORE, as that would cause unintended nonvolatile writes. During power-up, HSB floats HIGH until the device completes RECALL, then remains HIGH unless STORE is active.

How does the conditional AutoStore feature prevent premature wear of the QuantumTrap cells?

Conditional AutoStore skips the STORE operation unless at least one SRAM write has occurred since the last STORE or RECALL cycle. This avoids unnecessary nonvolatile programming during idle periods or read-only operation, directly preserving the 200,000-cycle endurance rating. The condition is enforced internally - no software polling or flag checking is required.

Is the CY14B104L-ZS20XCT compatible with standard SRAM timing controllers?

Yes - the CY14B104L-ZS20XCT uses identical control timing (tAA, tACE, tDOE, tHZWE) and electrical signaling (TTL-compatible inputs, CMOS outputs) as standard 20 ns 512K × 8 SRAMs. No timing modification or additional handshaking is needed; only VCAP capacitor addition and optional HSB monitoring are required for full nvSRAM functionality.