Infineon Technologies CY62128ELL-45SXI

Overview

CY62128ELL-45SXI from Cypress Semiconductor is a 1-Mbit (128 K × 8) CMOS static RAM with 45 ns access time, 4.5 V–5.5 V supply range, and industrial temperature rating (–40 °C to +85 °C). It features dual chip enables (CE1/CE2), automatic power-down, and TTL-compatible I/O for microcontroller and embedded system memory expansion in portable instrumentation and industrial controllers.

For engineers reviewing the CY62128ELL-45SXI datasheet, CY62128ELL-45SXI pinout, CY62128ELL-45SXI application, or CY62128ELL-45SXI equivalent, key selection criteria include ultra-low standby current (1 µA typical), CE-controlled power-down timing, 32-pin STSOP package compatibility, and TTL-level interface requirements versus CMOS input thresholds.

Technical Context

The CY62128ELL-45SXI implements a 128K × 8 asynchronous SRAM architecture with independent CE1/CE2 logic enabling hierarchical memory banking. Its automatic power-down activates when CE1 is HIGH or CE2 is LOW, reducing ICC to ≤4 µA while maintaining data retention at VCC ≥ 2.0 V.

It supports three read modes (CE-controlled, OE-controlled, and CE/OE-coordinated) and two write modes (WE-controlled with CE active, OE irrelevant). Timing is guaranteed under 100 pF load with 1 V/ns edge rates, and output drive meets TTL VOH/VOL specs at IOH = –1 mA and IOL = 2.1 mA.

Key Specifications

Pinout & Package

Package: 32-pin STSOP (Shrink Thin Small Outline Package), 0.4 mm pitch, JEDEC MO-153 compliant, body size 10.16 mm × 5.2 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV1288BLL-45NLI and MCM62128BZP45, the CY62128ELL-45SXI uniquely delivers TTL compatibility, industrial temperature range, and sub-4 µA standby in one 32-pin STSOP package - making it the sole choice for retrofitting legacy 5 V controller designs with battery-backed memory.

Availability

CY62128ELL-45SXI is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and automotive diagnostic tools requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY62128ELL-45SXI 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 IoT applications.

The CY62128E MoBL® SRAM product line targets battery-constrained embedded systems, emphasizing ultra-low power consumption, TTL interoperability, and robust operation across industrial temperature extremes.

FAQ

Is CY62128ELL-45SXI compatible with 3.3 V microcontrollers?

No. The CY62128ELL-45SXI requires 4.5 V–5.5 V supply and is specified for TTL-level inputs (VIH ≥ 2.2 V), not 3.3 V CMOS logic. Interfacing with 3.3 V MCUs requires level-shifting circuitry on all address, data, and control lines to prevent damage and ensure valid voltage thresholds.

What happens to data during power-down mode?

Data remains fully retained as long as VCC stays ≥ 2.0 V and CE1 is HIGH or CE2 is LOW. The device enters automatic power-down, drawing ≤4 µA, and preserves memory contents indefinitely - verified per JEDEC JESD22-A117 data retention testing at 85 °C for 10 years.

Can CE1 and CE2 be tied together for simplified control?

Yes, but only if externally inverted: CE2 must be driven HIGH when CE1 is LOW to enable the device. Direct tying violates the required CE1=LOW AND CE2=HIGH logic condition and will prevent read/write operations or force unintended power-down.

Does this SRAM require an external clock signal?

No. The CY62128ELL-45SXI is an asynchronous static RAM with no clock input. All operations are controlled by edge- and level-sensitive signals (CE1, CE2, OE, WE) with timing defined by tAA, tRC, and other AC parameters - eliminating clock tree design complexity and jitter concerns.