Infineon Technologies CY62126ESL-45ZSXAT

Overview

CY62126ESL-45ZSXAT from Cypress Semiconductor is a 1-Mbit (64 K × 16) automotive-grade CMOS static RAM with 45 ns access time, 2.2–3.6 V / 4.5–5.5 V dual-voltage operation, and ultra-low standby current (1 µA typical). It supports byte-wide read/write via independent BHE/ BLE controls and features automatic CE-driven power-down for battery-sensitive applications including telematics control units and ADAS sensor buffers.

For engineers reviewing the CY62126ESL-45ZSXAT datasheet, CY62126ESL-45ZSXAT pinout, CY62126ESL-45ZSXAT application, or CY62126ESL-45ZSXAT equivalent, key selection criteria include its dual-voltage compatibility, 44-pin TSOP II package, 99% standby power reduction, and MoBL®-optimized active current (1.3 mA at 1 MHz).

Technical Context

The CY62126ESL-45ZSXAT implements a full CMOS 64K × 16 SRAM array with independent high- and low-byte enables (BHE/BLE), enabling selective 8-bit writes without disturbing adjacent data. Its address decoding uses A0–A15 for full 64K-word addressing and supports asynchronous read/write cycles with guaranteed tRC = 45 ns across automotive temperature range (–40°C to +85°C).

Power management is handled through CE-controlled automatic power-down: when CE is HIGH at CMOS level, ICCDR drops to ≤3 µA at VCC = 1.5 V, and ISB2 remains ≤4 µA at max VCC. I/O pins enter high-impedance state during deselect, OE HIGH, or write operations-ensuring clean bus sharing in multi-device memory systems.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), 400 mil width, lead-free (RoHS-compliant), JEDEC MO-141AC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV102416BLL-45NLI and R1LV0108ESB-45PB, the CY62126ESL-45ZSXAT uniquely supports dual-voltage rails and fits the industry-standard 44-pin TSOP II footprint-making it the only option for cost-sensitive, space-constrained automotive systems needing both 2.5 V and 5 V interoperability.

Availability

CY62126ESL-45ZSXAT is available at Aetrix Electronics and suitable for telematics control units, ADAS sensor hubs, and body control modules requiring stable component supply across extended automotive lifecycles.

Supply support for CY62126ESL-45ZSXAT 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 global leader in high-performance memory, microcontrollers, and connectivity solutions for automotive, industrial, and consumer applications.

The CY62126ESL belongs to Cypress's MoBL® Automotive SRAM product line, engineered specifically for ultra-low-power, high-reliability memory in battery-backed and always-on vehicle subsystems.

FAQ

What is the minimum VCC required to retain data in CY62126ESL-45ZSXAT?

The device guarantees data retention down to VCC = 1.5 V, as specified in the Data Retention Characteristics table. At this voltage, ICCDR remains ≤3 µA, allowing extended hold time during brown-out events. Full functionality resumes once VCC rises above 2.2 V (for low-voltage mode) or 4.5 V (for high-voltage mode), with 100 µs ramp time recommended.

Can CY62126ESL-45ZSXAT operate reliably at 3.3 V?

Yes-3.3 V falls within the validated 2.2–3.6 V operating range. All AC and DC parameters, including 45 ns access time and 1.3 mA active current, are fully specified and tested at 3.3 V. The device also meets AEC-Q100 Class 2 requirements at this voltage across –40°C to +85°C.

How does the automatic power-down feature activate?

Automatic power-down activates when Chip Enable (CE) is driven HIGH at CMOS level (≥VCC – 0.2 V), regardless of OE or WE state. This forces the device into ISB2 mode (≤4 µA), disables internal circuitry, and places all I/O pins in high-impedance state-no additional control signals or configuration registers are required.

Are the NC pins on CY62126ESL-45ZSXAT electrically isolated?

Yes-pins 1, 10, 11, 31, 32, and 36 are No Connect (NC) and are not bonded to the silicon die. They must remain unconnected on the PCB; routing traces or applying voltage to these pins may cause unpredictable behavior or damage. The datasheet explicitly states "NC pins are not connected on the die."