Infineon Technologies CY62126ESL-45ZSXA

Overview

CY62126ESL-45ZSXA from Cypress Semiconductor is a 1-Mbit (64 K × 16) MoBL® Automotive 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-level write control via BHE/ BLE, automatic power-down on deselection, and operates across –40 °C to +85 °C for automotive infotainment and ADAS memory buffering.

For engineers reviewing the CY62126ESL-45ZSXA datasheet, CY62126ESL-45ZSXA pinout, CY62126ESL-45ZSXA application, or CY62126ESL-45ZSXA equivalent, key selection criteria include TSOP II package compatibility, 16-bit data bus interface, CE/OE/BHE/ BLE timing margins, and ISB2 ≤ 4 µA at VCC(max) for battery-sensitive systems.

Technical Context

This SRAM implements a 64K × 16 asynchronous architecture with independent high- and low-byte enables (BHE, BLE), enabling partial-word writes without external logic. Its CMOS design achieves 1.3 mA typical active current at 1 MHz and <4 µA maximum standby current under full CMOS input conditions.

The device features automatic power-down when CE is HIGH, forcing I/Os into high-impedance state and reducing ICCDR to ≤3 µA at VCC = 1.5 V. All switching parameters-including tRC = 45 ns, tDOE = 22 ns, and tHZOE = 18 ns-are specified over automotive temperature and dual voltage ranges.

Key Specifications

Pinout & Package

44-pin Thin Small Outline Package (TSOP II), 0.8 mm pitch, 10.16 mm × 18.4 mm footprint, JEDEC MO-143 compliant. Pin 1 marked by notch or dot; top view shown in datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-Mbit SRAM applications.

Compared with IS62WV51216BLL-45NLI and R1LV5256ES-45Z, CY62126ESL-45ZSXA uniquely combines AEC-Q100 Grade 2 qualification, dual-voltage support, and guaranteed 45 ns performance across full temperature range-making it the only choice for certified automotive memory subsystems requiring robustness and design reuse.

Availability

CY62126ESL-45ZSXA is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera interfaces, and body control modules requiring stable component supply across extended temperature and dual-voltage environments.

Supply support for CY62126ESL-45ZSXA 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 semiconductor company specializing in memory, PSoC, and USB solutions for automotive, industrial, and consumer markets.

CY62126ESL belongs to the MoBL® Automotive SRAM product line, engineered specifically for low-power, high-reliability memory buffering in automotive electronic control units operating across harsh thermal and electrical environments.

FAQ

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

The device guarantees data retention down to VCC = 1.5 V, as specified by VDR parameter. At this voltage, ICCDR remains ≤3 µA, enabling long-term retention using supercapacitor or small backup battery. Operation below 1.5 V risks data loss, and no timing or functional behavior is guaranteed below this threshold.

Can CY62126ESL-45ZSXA operate reliably in the 3.6 V to 4.5 V VCC range?

No. Datasheet Note 2 explicitly states that specifications are not guaranteed for VCC between 3.6 V and 4.5 V. The device is characterized and warranted only for 2.2–3.6 V and 4.5–5.5 V ranges. Operation in the gap may cause undefined behavior or accelerated wear.

How does automatic power-down behave when OE is HIGH but CE is LOW?

Automatic power-down is triggered solely by CE HIGH. When CE is LOW and OE is HIGH, the device remains powered and address/data lines are sampled-but outputs are disabled (high-Z), and no read or write occurs. Active current (ICC) still flows due to internal logic activity, so true low-power state requires CE HIGH.

Are NC pins on CY62126ESL-45ZSXA required to be left floating?

Yes. Pins 10, 11, 31, 32, and 36 are internally unconnected (NC) and must not be soldered to traces or tied to any net. Per datasheet Page 3 Note 1, connecting NC pins may cause unpredictable behavior or increased leakage; they should remain electrically isolated on PCB layout.