Infineon Technologies CY14B116M-BZ45XIT

Overview

CY14B116M-BZ45XIT from Infineon Technologies (formerly Cypress) is a 16-Mbit nonvolatile SRAM with integrated real-time clock, organized as 1024 K × 16, featuring 45-ns access time, AutoStore on power-down, software/hardware STORE/RECALL, and RTC with alarm, watchdog, and programmable square-wave output. It serves in industrial control systems requiring persistent memory and accurate timekeeping during brownouts.

For engineers reviewing the CY14B116M-BZ45XIT datasheet, CY14B116M-BZ45XIT pinout, CY14B116M-BZ45XIT application, or CY14B116M-BZ45XIT equivalent, key selection criteria include ×16 bus width support, dual CE interface for FBGA, RTC backup via capacitor or battery, 20-year data retention, and Sleep mode availability only in FBGA package.

Technical Context

The device integrates a high-speed SRAM array (4096 × 4096) with parallel QuantumTrap nonvolatile storage cells, enabling simultaneous STORE/RECALL across all locations. Its RTC subsystem includes a 32.768-kHz crystal oscillator, leap-year calendar, programmable alarm interrupt, and 0.45 µA typical backup current.

Memory operation supports standard asynchronous SRAM timing with CE/OE/WE control logic and byte enables (BHE/BLE) for ×16 configuration. Power-loss handling relies on VCAP-supplied energy to complete STORE within tSTORE (max 20 ms), while RTC maintains time using either VRTCcap or VRTCbat supply paths.

Key Specifications

Pinout & Package

The CY14B116M-BZ45XIT is packaged in a 165-ball fine-pitch ball grid array (FBGA), supporting dual CE interface and Sleep mode via ZZ pin - unavailable in TSOP II variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK15C88-45I and DS1248W-150+T&R, CY14B116M-BZ45XIT delivers higher bandwidth (×16 interface), tighter timing (45 ns), monolithic integration reducing BOM count, and flexible RTC backup (capacitor or battery), making it optimal for new industrial and medical platforms demanding scalability and long-term supply stability.

Availability

CY14B116M-BZ45XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device timestamping, and smart grid metering requiring stable component supply, long-life qualification, and RoHS-compliant packaging.

Supply support for CY14B116M-BZ45XIT 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 MCUs, and reliable memory solutions.

This part belongs to Infineon's nvSRAM product line, designed specifically for mission-critical systems needing deterministic nonvolatile storage and autonomous timekeeping without external supervision.

FAQ

What is the function of the VRTCcap and VRTCbat pins?

VCAP and VRTCbat are mutually exclusive RTC backup supply inputs: VRTCcap connects to a capacitor charged from VCC for short-term backup (typically seconds to minutes), while VRTCbat accepts a primary lithium battery for long-term operation. Only one may be used; the other must remain unconnected per datasheet guidance.

Does CY14B116M-BZ45XIT support ×8 and ×16 configurations simultaneously?

No. The CY14B116M variant is fixed at 1024 K × 16 organization and uses DQ0–DQ15 with BHE/BLE controls. The ×8 version is the CY14B116K (2048 K × 8). Pin compatibility does not imply functional interchangeability - address and data bus widths are physically and logically distinct.

How is Sleep mode activated and what is its power impact?

Sleep mode is enabled by pulling the ZZ pin LOW while CE is HIGH. In this state, active current drops to 10 µA, but SRAM contents remain volatile and RTC continues running from VRTCcap/VRTCbat. Sleep mode is supported only in the 165-ball FBGA package - absent in TSOP II variants.

Can the INT pin output both alarm interrupts and square-wave signals?

Yes. The INT pin is multiplexed: it asserts as an open-drain interrupt for RTC alarm or watchdog timeout, or outputs a continuous square wave (1 Hz, 512 Hz, 4.096 kHz, or 32.768 kHz) when configured in Square Wave mode. Configuration is controlled via internal RTC registers; modes are mutually exclusive per register setting.