Infineon Technologies CY22E016L-SZ45XC

Overview

CY22E016L-SZ45XC from Cypress Semiconductor is a 16 Kbit (2K × 8) nonvolatile SRAM with QuantumTrap™ technology, operating at 45 ns access time, single 5V ±10% supply, and SOIC-28 package. It performs automatic STORE on power loss using an external 68 μF VCAP capacitor and RECALL on power-up, enabling data retention for 100 years with 1M STORE cycles. Used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY22E016L-SZ45XC datasheet, CY22E016L-SZ45XC pinout, CY22E016L-SZ45XC application, or CY22E016L-SZ45XC equivalent, this page delivers verified timing, power, interface, and nonvolatile operation details - including HSB-controlled hardware STORE, AutoStore inhibit mode, and VCAP capacitor sizing guidance for reliable system-level data persistence.

Technical Context

The CY22E016L integrates standard SRAM cells with parallel-coupled QuantumTrap nonvolatile elements per cell, enabling simultaneous STORE/RECALL across all 2,048 bytes. Its dual-mode STORE initiation - via power-down AutoStore (VCAP-triggered) or hardware request (HSB pin) - ensures deterministic nonvolatile write timing independent of system slew rate.

Operation requires strict voltage sequencing: VCC must remain ≥3.6V for 10 ms during STORE; RECALL initiates automatically when VCC crosses VSWITCH (~3.0V) on power-up. The HSB pin serves both as open-drain busy indicator and hardware trigger, supporting synchronized multi-device STORE with shared VCAP.

Key Specifications

Pinout & Package

Package: 28-pin SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant, 300 mil body width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-45I/M and FM16W08-45-TG, the CY22E016L-SZ45XC uniquely balances capacitor-based reliability, 100-year retention, and industrial temperature support - making it optimal for cost-sensitive, maintenance-free industrial controllers where STORE frequency is moderate and board space permits a 68 μF capacitor.

Availability

CY22E016L-SZ45XC is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, telecom base stations, and automotive ADAS recorders requiring stable component supply with guaranteed 10+ year lifecycle support.

Supply support for CY22E016L-SZ45XC 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 infrastructure markets.

The CY22E016L belongs to Cypress's QuantumTrap nvSRAM product line, engineered specifically to replace battery-backed SRAM in mission-critical systems where maintenance access is impractical and data integrity must survive uncontrolled power loss.

FAQ

What is the minimum VCAP capacitance required for guaranteed STORE operation?

The CY22E016L-SZ45XC requires a minimum 68 μF capacitor (±20%, 6V rating) on the VCAP pin to ensure successful STORE during power loss. This value is derived from worst-case energy budget analysis at 5.5V VCC and accounts for internal voltage regulation losses. Using less than 68 μF risks incomplete STORE under fast power-down conditions or elevated temperature.

Can the HSB pin be left unconnected if AutoStore is used?

Yes - the HSB pin has an internal weak pull-up and may be left floating when only AutoStore (power-loss-triggered) is required. However, leaving it unconnected forfeits hardware STORE capability and removes the ability to monitor STORE progress or synchronize multiple devices. For robust designs, a 10 kΩ external pull-up to VCC is recommended.

How does the CY22E016L prevent inadvertent STORE during power-up?

The CY22E016L monitors VCC against VSWITCH (~3.0V). If VCC rises above VSWITCH after a brownout, it initiates RECALL - not STORE. STORE is inhibited unless a valid WRITE occurs after RECALL completes. This prevents spurious STOREs caused by noisy power rails or partial initialization sequences.

Is the CY22E016L-SZ45XC compatible with standard 2K × 8 SRAM footprints and timing?

Yes - the CY22E016L-SZ45XC uses identical pinout, address/data bus timing, and control signal definitions (CE, WE, OE) as industry-standard 2K × 8 SRAMs. No PCB redesign or firmware changes are needed for drop-in replacement, though VCAP capacitor addition and HSB handling (if used) require minor schematic updates.