Infineon Technologies CY14B101LA-BA45XIT

Overview

CY14B101LA-BA45XIT from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, supporting 45 ns access time, single 3.0 V ±10% operation, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using an external VCAP capacitor and supports software/hardware-initiated STORE/RECALL cycles in embedded control and data-logging systems.

For engineers reviewing the CY14B101LA-BA45XIT datasheet, CY14B101LA-BA45XIT pinout, CY14B101LA-BA45XIT application, or CY14B101LA-BA45XIT equivalent, key selection factors include AutoStore timing dependency on VCAP capacitance, HSB-driven hardware STORE arbitration, ×8 vs ×16 configuration pin compatibility, and 1 million STORE endurance versus infinite SRAM read/write cycles.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 131,072 bytes without block addressing. The architecture inhibits SRAM access during STORE/RECALL, requiring system-level coordination via HSB status monitoring or software sequence control.

AutoStore activation relies on internal voltage detection at VCC < VSWITCH (2.2 V typ), triggering charge transfer from VCAP (minimum 4.7 µF, 5.5 V rating) to complete one full STORE cycle. Hardware STORE is initiated by pulling HSB low, while software STORE uses a specific address write sequence - both operations guarantee atomicity and retain data for 20 years.

Key Specifications

Pinout & Package

The CY14B101LA-BA45XIT is packaged in a 44-pin Thin Small Outline Package (TSOP II), Type II, with 0.8 mm pitch and body size 10.16 mm × 18.41 mm. Pin 1 is located at bottom-left corner when notch faces upward.

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, the CY14B101LA-BA45XIT uniquely combines hands-off AutoStore, HSB-driven hardware control, and 20-year retention - making it optimal for unattended industrial systems where capacitor-based reliability is acceptable and deterministic STORE timing is critical.

Availability

CY14B101LA-BA45XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and automotive telematics event buffering requiring stable component supply and long-term lifecycle support.

Supply support for CY14B101LA-BA45XIT 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 memory solutions.

This part belongs to the QuantumTrap nvSRAM product line, designed specifically for mission-critical data retention in environments where battery backup is impractical and EEPROM write latency is unacceptable.

FAQ

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

The datasheet specifies a minimum 4.7 µF tantalum or ceramic capacitor rated for 5.5 V on the VCAP pin. Using less capacitance risks incomplete STORE cycles during rapid VCC collapse, leading to partial or corrupted data retention. Derating to 10 µF is recommended for designs operating near –40°C or with high ESR board traces.

Can CY14B101LA-BA45XIT be used in a ×16 configuration?

No - the CY14B101LA variant is strictly 128 K × 8. The ×16 configuration is implemented in the CY14B101NA part number, which has different pinout (BHE/BLE present, no A16), and is not interchangeable. Attempting ×16 operation on CY14B101LA will result in address decoding errors and undefined behavior.

How does the HSB pin behave during power-up and RECALL?

At power-up, HSB is driven HIGH for tHHHD (200 ns max) after VCC crosses VSWITCH, then held HIGH by weak internal pull-up. During RECALL, HSB remains HIGH and does not assert LOW - it only signals STORE activity. Systems must monitor HSB only during STORE initiation or AutoStore events, not during RECALL.

Is the CY14B101LA-BA45XIT RoHS compliant and lead-free?

Yes - the part is fully RoHS compliant and Pb-free, as confirmed in the Infineon datasheet revision *S. The 44-pin TSOP II package uses matte tin (Sn) termination finish, qualified per J-STD-020 moisture sensitivity level 3, and supports standard reflow profiles up to 260°C peak.