Infineon Technologies CY62146ESL-45ZSXI

Overview

CY62146ESL-45ZSXI from Infineon Technologies (formerly Cypress) is a 4-Mbit (256K × 16) CMOS static RAM with 45 ns access time, operating across dual voltage ranges (2.2–3.6 V and 4.5–5.5 V), ultra-low standby current (7 µA max), and automatic CE-controlled power-down mode. It serves as a low-power, high-speed data buffer in portable industrial controllers and battery-powered telemetry modules.

For engineers reviewing the CY62146ESL-45ZSXI datasheet, CY62146ESL-45ZSXI pinout, CY62146ESL-45ZSXI application, or CY62146ESL-45ZSXI equivalent, key selection criteria include its MoBL®-optimized active/standby current ratio, byte-wide I/O control via BHE/BLE, TSOP II package compatibility, and guaranteed operation over –40°C to +85°C industrial temperature range.

Technical Context

The CY62146ESL-45ZSXI implements a full CMOS SRAM architecture with independent byte enable (BHE/BLE) for 16-bit data bus partitioning, enabling selective 8-bit writes without read-modify-write cycles. Its automatic power-down activates when CE is HIGH and address lines are stable, reducing ICC to ≤7 µA.

It supports asynchronous read/write with strict timing constraints: tRC = 45 ns, tDOE = 22 ns, tHZOE = 18 ns, and tPD = 45 ns. All I/O pins enter high-impedance state during deselection (CE HIGH), OE HIGH, or write (WE LOW), ensuring clean bus sharing in multi-device systems.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), 400 mil width, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV25616BLL-45NLI and R1LV25616ASB-45SI, the CY62146ESL-45ZSXI uniquely delivers dual-voltage operation *and* sub-7 µA standby in one industrial-grade TSOP II package - eliminating voltage translation or power-gating circuitry in cross-platform designs.

Availability

CY62146ESL-45ZSXI is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature and dual-voltage environments.

Supply support for CY62146ESL-45ZSXI 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 memory solutions for industrial, automotive, and IoT applications.

CY62146ESL belongs to Infineon's MoBL® (More Battery Life™) SRAM product line, engineered specifically for ultra-low-power portable and battery-constrained embedded systems requiring reliable, fast-access volatile memory without voltage translation.

FAQ

What is the minimum VCC required to retain data in CY62146ESL-45ZSXI?

The device guarantees data retention at VCC ≥ 1.5 V, as specified in the Data Retention Characteristics table. At this voltage, ICCDR remains ≤8.8 µA, allowing indefinite retention when CE is HIGH and inputs are held at valid logic levels. This enables safe operation during brown-out conditions or backup-supply handover.

Can CY62146ESL-45ZSXI operate reliably at 3.3 V and 5 V on the same PCB?

Yes - the device is explicitly rated for both 2.2–3.6 V and 4.5–5.5 V operation, with no intermediate voltage gap. It does not operate between 3.6 V and 4.5 V, so system design must avoid that range. This dual-range support eliminates need for separate 3.3 V and 5 V SRAM SKUs in mixed-voltage boards.

How does automatic power-down activate, and what signals must be controlled?

Automatic power-down engages when CE is driven HIGH at CMOS level (≥VCC – 0.2 V) and all address/data inputs are stable (no toggling). OE, WE, BHE, and BLE may float or be held static. No additional control logic is needed - the feature is fully internal and reduces ICC to ≤7 µA without external intervention.

Is the TSOP II package of CY62146ESL-45ZSXI compatible with standard reflow profiles?

Yes - the lead-free TSOP II package complies with JEDEC J-STD-020D moisture sensitivity level 3 and supports standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C). Thermal resistance values (θJA = 57.92°C/W) are validated on a 4-layer PCB, confirming suitability for automated SMT assembly.