Infineon Technologies CY14B116M-ZSP25XIT

Overview

CY14B116M-ZSP25XIT from Infineon Technologies (formerly Cypress) is a 16-Mbit nonvolatile SRAM with integrated real-time clock, organized as 1024 K × 16, featuring 25-ns access time, QuantumTrap nonvolatile storage, and industrial-grade operation from –40 °C to +85 °C. It delivers hands-off AutoStore on power-down using only a capacitor, supports software/hardware STORE/RECALL, and integrates RTC with alarm, watchdog timer, and programmable square-wave output - deployed in industrial PLCs, medical data loggers, and telecom base station control modules.

For engineers reviewing the CY14B116M-ZSP25XIT datasheet, CY14B116M-ZSP25XIT pinout, CY14B116M-ZSP25XIT application, or CY14B116M-ZSP25XIT equivalent, key selection criteria include ×16 bus width support, dual CE interface for FBGA, VRTCcap/VRTCbat backup flexibility, HSB-driven hardware STORE timing, and RTC interrupt routing via INT pin - all critical for deterministic nonvolatile memory retention in mission-critical embedded systems.

Technical Context

The device integrates two independent functional blocks: a high-speed SRAM array (1024 K × 16) and a full-featured RTC subsystem sharing a common die. The SRAM uses QuantumTrap technology for nonvolatile storage, enabling parallel STORE/RECALL across all cells with no wear-out on reads/writes and 1 million STORE endurance.

RTC functionality includes leap-year compensation, programmable alarm intervals (minutes/hours/days/months), watchdog timer with reset capability, and selectable square-wave outputs (1 Hz / 512 Hz / 4.096 kHz / 32.768 kHz). Backup power is supported via either capacitor (VCAP, VRTCcap) or battery (VRTCbat), with typical RTC standby current of 0.45 µA.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), RoHS-compliant, with dual CE (CE1/CE2) interface and dedicated RTC pins (Xin, Xout, VRTCcap, VRTCbat, INT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-3AJ5F and FM31L278-G, CY14B116M-ZSP25XIT uniquely combines ×16 bus width, 25-ns speed, monolithic RTC, and capacitor-backed AutoStore - making it optimal for space-constrained, high-reliability industrial controllers needing deterministic nonvolatile state preservation.

Availability

CY14B116M-ZSP25XIT is available at Aetrix Electronics and suitable for industrial data loggers, telecom base station controllers, medical diagnostic equipment, and factory automation PLCs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for CY14B116M-ZSP25XIT 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, sensing, connectivity, and security solutions for automotive, industrial, and IoT markets.

CY14B116M-ZSP25XIT belongs to Infineon's legacy Cypress nvSRAM product line, designed specifically for applications demanding zero-data-loss memory retention and integrated timekeeping without external components or firmware overhead.

FAQ

What is the difference between CY14B116K and CY14B116M?

CY14B116K is organized as 2048 K × 8 (8-bit data bus), while CY14B116M uses 1024 K × 16 (16-bit data bus). Both share identical RTC features, QuantumTrap technology, and AutoStore capability. The ZSP25XIT suffix confirms this is the 16-bit variant in FBGA package with 25-ns access time and industrial temperature range.

Can the RTC operate without VRTCcap or VRTCbat connected?

No - the RTC requires either VRTCcap (capacitor backup) or VRTCbat (battery backup) to maintain timekeeping during main power loss. If neither is connected, the RTC stops and resets on power-up. The datasheet specifies that these pins must be left unconnected only when RTC functionality is intentionally disabled.

How does the HSB pin function during a STORE operation?

HSB is an open-drain output that goes LOW during active STORE (hardware or software-initiated) and returns HIGH upon completion. When externally pulled LOW, it triggers immediate STORE - used for emergency saves. After STORE, HSB is driven HIGH for tHHHD (100 ns min), then held weakly HIGH by internal pull-up.

Is the CY14B116M-ZSP25XIT pin-compatible with earlier CY14B116M variants?

Yes - the ZSP25XIT uses the same 165-ball FBGA footprint and pinout as other CY14B116M FBGA variants (e.g., ZSP25XI). Differences are limited to timing grade (25 ns vs. 45 ns) and marking; electrical and mechanical compatibility is maintained per Infineon's continuity assurance for Cypress legacy products.