Infineon Technologies CY62128BLL-70ZC

Overview

CY62128BLL-70ZC from Cypress Semiconductor is a 128K × 8 (131,072 × 8) CMOS static RAM with 70 ns access time, 4.5–5.5 V operation, and industrial-grade temperature range (–40°C to +85°C). Packaged in a 32-pin TSOP Type I, it delivers low active power (82.5 mW max) and ultra-low standby current (15 µA max), enabling use in battery-backed memory subsystems for industrial controllers and legacy embedded systems.

For engineers reviewing the CY62128BLL-70ZC datasheet, CY62128BLL-70ZC pinout, CY62128BLL-70ZC application, or CY62128BLL-70ZC equivalent, key selection criteria include TTL-compatible I/O timing, dual chip enable architecture (CE1 active LOW / CE2 active HIGH), automatic CE-driven power-down, and compatibility with 5 V memory buses in space-constrained PCB layouts.

Technical Context

The CY62128BLL-70ZC implements a full CMOS SRAM array with 17 address lines (A0–A16), eight bidirectional I/O pins (I/O0–I/O7), and three control inputs-WE (active LOW write strobe), OE (active LOW output enable), and dual CE logic (CE1 active LOW, CE2 active HIGH). Its internal power-down state activates when CE1 is HIGH or CE2 is LOW, reducing ICC to ≤15 µA without external circuitry.

Timing is defined by overlapping control signals: read requires CE1=LOW, CE2=HIGH, OE=LOW, WE=HIGH; write requires CE1=LOW, CE2=HIGH, WE=LOW. All I/O pins enter high-impedance state during deselection, OE=HIGH, or write cycles-ensuring clean bus sharing in multi-device memory maps.

Key Specifications

Pinout & Package

Package: 32-pin TSOP Type I (Z32), 10.16 mm × 20.95 mm body, 0.5 mm pitch, surface-mount, commercial temperature grade (0°C to +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62C1024AL-70QLI and R1LV0108ES-70SI#S0, the CY62128BLL-70ZC provides unique dual CE control for flexible memory banking, lower standby current, and broader industrial temperature support-critical for legacy system upgrades and long-lifecycle deployments.

Availability

CY62128BLL-70ZC is available at Aetrix Electronics and suitable for industrial automation, legacy microcontroller systems, and point-of-sale terminals requiring stable component supply over extended product lifecycles.

Supply support for CY62128BLL-70ZC 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 programmable logic solutions for industrial, automotive, and communications markets.

The CY62128B MoBL® (Mobile Bit-Like) SRAM product line was designed for low-power, high-reliability embedded memory applications where predictable timing, wide temperature tolerance, and long-term supply stability are essential.

FAQ

Is CY62128BLL-70ZC pin-compatible with CY62128ELL-70ZC?

No. The "LL" suffix denotes low-power MoBL® architecture with automatic CE-driven power-down, while "EL" indicates an earlier generation with different standby current behavior and timing parameters. Pinouts match, but electrical characteristics-including ISB2 (15 µA vs. ~50 µA) and tPD (70 ns vs. 100 ns)-are not interchangeable without validation.

Can CY62128BLL-70ZC operate reliably at 4.5 V with 70 ns timing?

Yes. The datasheet specifies tAA ≤70 ns and all DC/AC parameters-including VOH ≥2.4 V and VOL ≤0.4 V-are guaranteed across the full 4.5–5.5 V VCC range and 0°C to +70°C temperature range. No derating is required at minimum VCC.

What is the function of CE2 when used with CE1 in memory expansion?

CE2 acts as a polarity-inverted secondary chip enable: the device is selected only when CE1=LOW AND CE2=HIGH. This allows cascading multiple CY62128B devices using a high-order address bit to drive CE2, enabling seamless 256K+ memory maps without external gating logic.

Does CY62128BLL-70ZC require external pull-up resistors on control pins?

No. All control inputs (CE1, CE2, OE, WE) have TTL-compatible thresholds and do not require external biasing. However, floating inputs must be avoided: CE1 should be pulled LOW for active use or HIGH for standby; CE2 must be held HIGH during operation or LOW to force deselection.