Infineon Technologies CY62138EV30LL-45BVXI

Overview

CY62138EV30LL-45BVXI from Cypress Semiconductor is a 2-Mbit (256 K × 8) CMOS static RAM with 45 ns access time, operating across 2.2 V to 3.6 V supply, featuring ultra-low standby current (1 µA typical), automatic CE-controlled power-down, and Pb-free 36-ball BGA packaging - deployed in battery-constrained portable systems including cellular handsets and handheld medical monitors.

For engineers reviewing the CY62138EV30LL-45BVXI datasheet, CY62138EV30LL-45BVXI pinout, CY62138EV30LL-45BVXI application, or CY62138EV30LL-45BVXI equivalent, key selection criteria include guaranteed 45 ns read cycle time, dual standby current specs (ISB1/ISB2 ≤ 7 µA), VCC range compatibility with Li-ion and regulated 3.3 V rails, and BGA thermal resistance (θJA = 72 °C/W) for compact PCB layout.

Technical Context

This SRAM implements a fully decoded 256K × 8 architecture with complementary metal oxide semiconductor (CMOS) process technology optimized for low-power, high-speed operation. It supports three-state I/Os (I/O0–I/O7), independent CE/OE/WE control logic, and automatic power-down when CE is HIGH - eliminating external power management circuitry.

Read operations require CE and OE LOW with WE HIGH; writes occur when CE and WE are LOW, latching data on address A0–A18. All I/O pins enter high-impedance state during deselect (CE HIGH), output disable (OE HIGH), or write cycles - enabling seamless bus sharing in multi-peripheral embedded systems.

Key Specifications

Pinout & Package

Package: 36-ball Fine-Pitch Ball Grid Array (FBGA), 6 mm × 6 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV2568BLL-45NLI and R1LV2568ASBG-45PB, CY62138EV30LL-45BVXI delivers the lowest guaranteed standby current (7 µA max) in the smallest standard 0.8 mm pitch BGA, making it optimal for space- and battery-limited portable designs where thermal margin is adequate.

Availability

CY62138EV30LL-45BVXI is available at Aetrix Electronics and suitable for cellular handset memory buffers, portable medical sensor caches, and industrial PLC I/O register banks requiring stable component supply across extended product lifecycles.

Supply support for CY62138EV30LL-45BVXI 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-performance, low-power memory and programmable solutions for embedded systems, with global R&D and manufacturing infrastructure.

The MoBL® (More Battery Life™) SRAM product line targets portable and energy-sensitive applications, emphasizing ultra-low standby current, wide VCC tolerance, and robust data retention - directly addressing battery runtime and reliability requirements in handheld electronics.

FAQ

What is the minimum VCC required to retain data in CY62138EV30LL-45BVXI?

The device guarantees data retention down to VCC = 1.0 V, as specified in the ICCDR parameter. This allows continued memory integrity during brown-out conditions or when operating from backup batteries, provided CE remains HIGH and inputs are held at valid CMOS levels. No external refresh or backup power circuitry is needed below nominal VCC.

Can CY62138EV30LL-45BVXI operate reliably at 2.2 V with 45 ns timing?

Yes - all AC specifications including tRC = 45 ns max, tAA = 45 ns max, and tDOE = 22 ns max are guaranteed across the full 2.2 V to 3.6 V VCC range and –40°C to +85°C temperature range. The datasheet's "Operating Range" table explicitly confirms 45 ns speed rating at VCC(min) = 2.2 V.

How does the automatic power-down feature behave when CE is HIGH but OE or WE float?

When CE is driven HIGH (≥ VCC – 0.2 V), the device enters ISB2 standby mode regardless of OE or WE state - even if those pins float. Input leakage current remains ≤ ±1 µA, and I/Os stay in high-impedance. However, Cypress recommends tying OE and WE to valid CMOS levels (VCC or GND) to ensure predictable behavior and avoid unintended current paths.

Are the NC pins on CY62138EV30LL-45BVXI required to be grounded or left open?

The NC pins (A15 and G1) are not connected to the die and may be left unconnected on the PCB. Cypress documentation states they are "not connected on the die"; grounding them is unnecessary and may introduce parasitic capacitance or routing congestion. Standard practice is to omit traces or vias to these balls unless board-level EMI mitigation requires otherwise.