Infineon Technologies CY62128ELL-45ZXIT

Overview

CY62128ELL-45ZXIT 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). It features dual chip enables (CE1/CE2), ultra-low standby current (1 µA typical), and automatic power-down when deselected-designed for battery-powered portable systems requiring reliable non-volatile data retention during sleep modes.

For engineers reviewing the CY62128ELL-45ZXIT datasheet, CY62128ELL-45ZXIT pinout, CY62128ELL-45ZXIT application, or CY62128ELL-45ZXIT equivalent, key selection criteria include TTL-compatible I/O levels, 32-pin STSOP package compatibility, CE-controlled power-down behavior, and MoBL® low-power architecture for extended runtime in handheld instrumentation and embedded controllers.

Technical Context

The CY62128ELL-45ZXIT implements a 128K × 8 asynchronous SRAM array with complementary metal oxide semiconductor (CMOS) process technology, delivering 45 ns tAA and tACE read access at 5 V. Its dual CE architecture (CE1 active-low, CE2 active-low) enables hierarchical memory expansion and selective bank disable without external logic.

It supports three distinct power states: full active (CE1 LOW & CE2 HIGH & WE HIGH & OE LOW), write-active (CE1 LOW & CE2 HIGH & WE LOW), and automatic standby (CE1 HIGH or CE2 LOW), where ICCDR drops to ≤4 µA while retaining data at VCC ≥ 2.0 V-enabling true low-power retention in portable medical monitors and IoT edge nodes.

Key Specifications

Pinout & Package

Package: 32-pin STSOP (Shrink Thin Small Outline Package), 0.4 mm pitch, JEDEC MO-153 compliant, 11.8 mm × 10.0 mm footprint with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62C128AL-45QLI and CY62128EV30LL-45ZSXI, the CY62128ELL-45ZXIT uniquely balances TTL compatibility, 5 V tolerance, and sub-µA standby-making it irreplaceable in cost-sensitive, battery-constrained 5 V embedded systems where level shifters add BOM cost and board area.

Availability

CY62128ELL-45ZXIT is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial PLC data buffers, and automotive body control units requiring stable component supply across long production lifecycles and temperature-critical deployments.

Supply support for CY62128ELL-45ZXIT 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 consumer applications, with core expertise in low-power SRAM and PSoC architectures.

The CY62128E MoBL® product line targets portable and battery-operated systems requiring extended runtime, fast random access, and guaranteed data retention during intermittent power-optimized for handheld, medical, and telematics use cases.

FAQ

Is CY62128ELL-45ZXIT compatible with 3.3 V microcontrollers?

No. The CY62128ELL-45ZXIT requires 4.5–5.5 V VCC and features TTL-level inputs (VIH ≥ 2.2 V), making it incompatible with native 3.3 V logic without level translation. Its I/O structure is designed for 5 V bus environments, and applying 3.3 V to VCC will result in undefined operation and potential data corruption.

What happens if both CE1 and CE2 are driven LOW simultaneously?

When CE1 is LOW and CE2 is LOW, the device enters an undefined state: outputs go high-impedance, internal logic halts, and power consumption rises unpredictably. The datasheet mandates CE1 LOW AND CE2 HIGH for normal operation; CE2 must never be held LOW during active use.

Can NC pin 26 be used as a ground or thermal pad connection?

No. Pin 26 is internally unconnected (NC) and not bonded to the die. Routing it to ground or attaching a thermal pad creates a parasitic path that may induce latch-up or ESD failure. It must remain floating and un-routed per Cypress layout guidelines in Document 38-05485 Rev. *P.

Does CY62128ELL-45ZXIT support battery-backed data retention?

Yes-when VCC is reduced to ≥2.0 V and CE1 is HIGH or CE2 is LOW, the device enters data retention mode with ICCDR ≤4 µA. This allows integration with coin-cell backup circuits (e.g., BR2032) to preserve memory contents for years during main power loss, provided voltage decay is controlled below 2.0 V threshold.