Infineon Technologies CY62128ELL-45ZXI

Overview

CY62128ELL-45ZXI from Cypress Semiconductor is a 1-Mbit (128 K × 8) CMOS static RAM with 45 ns access time, 4.5–5.5 V supply range, and industrial temperature rating (–40 °C to +85 °C), designed for low-power portable memory buffering in battery-powered embedded systems.

For engineers reviewing the CY62128ELL-45ZXI datasheet, CY62128ELL-45ZXI pinout, CY62128ELL-45ZXI application, or CY62128ELL-45ZXI equivalent, key selection criteria include ultra-low standby current (1 µA typ), dual chip enable architecture (CE1/CE2), TTL-level I/O compatibility, and STSOP-32 package footprint for space-constrained PCB layouts.

Technical Context

The CY62128ELL-45ZXI implements a 128K × 8 asynchronous SRAM array with complementary metal oxide semiconductor (CMOS) process technology, delivering 45 ns tAA and tACE read access times under 100 pF load conditions at VCC = 5.0 V and TA = 25 °C. Its automatic power-down logic activates when CE1 is HIGH or CE2 is LOW, reducing ICC to ≤4 µA.

It supports three distinct operating modes: active read (CE1=LOW, CE2=HIGH, OE=LOW, WE=HIGH), active write (CE1=LOW, CE2=HIGH, WE=LOW), and standby (CE1=HIGH or CE2=LOW), with all eight bidirectional I/O pins entering high-impedance state during deselection or write cycles.

Key Specifications

Pinout & Package

Package: 32-pin Shrink Thin Small Outline Package (STSOP), JEDEC MO-153 compliant, 8.0 mm × 13.4 mm body, 0.5 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV1288BLL-45NLI and CY62128EV30LL-45ZSXI, the CY62128ELL-45ZXI uniquely supports 5 V TTL interfacing without translation, maintains industrial temperature stability, and delivers verified 1 µA standby current-making it the only drop-in solution for legacy 5 V portable systems requiring MoBL® power efficiency.

Availability

CY62128ELL-45ZXI is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC data loggers, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for CY62128ELL-45ZXI 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) is a U.S.-based semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer applications.

The CY62128E MoBL® product line was engineered specifically to deliver ultra-low-power static RAM for battery-operated portable electronics, balancing speed, density, and sub-microamp standby consumption in standard 5 V systems.

FAQ

Is CY62128ELL-45ZXI compatible with 3.3 V microcontrollers?

No. The CY62128ELL-45ZXI requires 4.5–5.5 V VCC and features TTL-level input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), making it incompatible with native 3.3 V logic without level-shifting circuitry. It is intended for 5 V systems such as legacy 8051, PIC16, or discrete logic designs.

What is the function of the NC pin (Pin 26) in the STSOP package?

Pin 26 is a no-connect terminal-unbonded on the die and internally unconnected. Per Cypress design guidelines, it may be left floating or tied to GND for mechanical stability; it must never be driven or used as a signal path, as doing so risks latch-up or parametric shift.

Does CY62128ELL-45ZXI support data retention during power loss?

Yes. When VCC drops to ≥2.0 V and CE1 is held HIGH or CE2 LOW, the device enters data retention mode drawing ≤4 µA (industrial grade). Data remains valid for ≥24 hours under these conditions, provided address and data lines remain stable and no write cycles occur.

Can CE1 and CE2 be tied together for simplified control?

No. CE1 is active-LOW and CE2 is active-HIGH; tying them together forces the device into permanent deselection (CE1=HIGH ⇒ CE=HIGH). To enable the device, CE1 must be driven LOW while CE2 is driven HIGH-requiring two independent control signals or an inverter on one line.