Infineon Technologies CY62128ELL-45SXIT

Overview

CY62128ELL-45SXIT 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-45SXIT datasheet, CY62128ELL-45SXIT pinout, CY62128ELL-45SXIT application, or CY62128ELL-45SXIT equivalent, this SRAM delivers deterministic timing, TTL-compatible I/O levels, low active power (1.3 mA at 1 MHz), and pin compatibility with CY62128B for drop-in memory upgrades in legacy embedded controllers and instrumentation.

Technical Context

The CY62128ELL-45SXIT implements a full CMOS 128K × 8 asynchronous SRAM architecture with independent CE1/CE2 logic enabling hierarchical memory banking and seamless expansion. Its automatic power-down mode activates when CE1 is HIGH or CE2 is LOW, reducing ICC to ≤4 µA while maintaining data integrity down to VCC = 2.0 V.

All eight bidirectional I/O pins enter high-impedance state during deselect (CE1 HIGH or CE2 LOW), OE HIGH, or write cycles (WE LOW), ensuring clean bus sharing without external isolation. The device supports TTL-level input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and guarantees tAA = 45 ns and tDOE = 22 ns under 100 pF load conditions.

Key Specifications

Pinout & Package

Package: 32-pin STSOP (Shrink Thin Small Outline Package), RoHS-compliant, body size 10.16 mm × 5.59 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62C1024AL-45QLI and CY62128EV30LL-45ZSXI, the CY62128ELL-45SXIT offers direct TTL compatibility and lowest standby power in its class, making it optimal for cost-sensitive, battery-limited legacy systems-while the alternatives trade power or interface simplicity for broader temperature range or modern reliability specs.

Availability

CY62128ELL-45SXIT is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for CY62128ELL-45SXIT 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.

The MoBL® (More Battery Life™) SRAM product line targets ultra-low-power portable electronics, emphasizing sub-microamp standby current and fast wake-up timing without sacrificing 5 V compatibility.

FAQ

Is CY62128ELL-45SXIT compatible with 3.3 V systems?

No. This device requires 4.5–5.5 V supply and is not rated for 3.3 V operation. Its TTL-compatible inputs (VIH ≥ 2.2 V) and output drive strength are optimized for 5 V logic families. Using it below 4.5 V risks timing violations, data corruption, and failure to meet ISB2 specifications.

What happens to data during power-down mode?

Data is retained as long as VCC remains ≥ 2.0 V and CE1 is HIGH or CE2 is LOW. The device draws ≤4 µA in this state and maintains memory contents indefinitely-no external backup capacitor or battery is needed for short-term retention during sleep cycles.

Can CE1 and CE2 be tied together for simplified control?

Yes-connect CE1 to GND and CE2 to the system chip-select signal. This configuration converts dual-enable logic into standard single-enable behavior while preserving automatic power-down when the signal goes inactive.

Does CY62128ELL-45SXIT support byte-wide writes only?

Yes. With 8 bidirectional I/O lines and no byte-enable (UB/LB) pins, it performs full 8-bit parallel writes. To store partial bytes, external logic or software masking is required-unlike devices with dedicated byte-write controls.