Infineon Technologies CY62137VLL-70ZSXET

Overview

CY62137VLL-70ZSXET from Cypress Semiconductor is a 2-Mbit (128K × 16) CMOS static RAM with 55 ns/70 ns access time, operating across 2.7–3.6 V and supporting industrial (–40°C to +85°C) and automotive (–40°C to +125°C) temperature ranges. It features byte-level write control via BHE/BLE, automatic CE-driven power-down reducing standby current to 1 µA, and TTL-compatible I/O for seamless integration into memory subsystems of portable telecom and embedded controllers.

For engineers reviewing the CY62137VLL-70ZSXET datasheet, CY62137VLL-70ZSXET pinout, CY62137VLL-70ZSXET application, or CY62137VLL-70ZSXET equivalent, key selection criteria include its 70 ns read cycle time, 1 µA ISB2 standby current at 3.6 V, dual-byte enable architecture, and TSOP II (44-pin) package compatibility with space-constrained PCB layouts.

Technical Context

The CY62137VLL-70ZSXET implements a fully decoded 128K × 16 SRAM array with independent high- and low-byte write enables (BHE/BLE), enabling partial-word writes without external logic. Its power-down circuitry activates automatically when CE is HIGH or during address inactivity, achieving >99% current reduction versus active mode.

It supports three distinct read modes (address-, OE-, and BHE/BLE-controlled) and four write modes (WE-, CE-, WE+OE-, and BHE/BLE+OE-controlled), all defined by precise timing windows including tACE ≤ 70 ns, tDOE ≤ 35 ns, and tHZOE ≤ 25 ns under 30 pF load. All I/O pins enter high-impedance state during deselection, output disable, or write cycles.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP Type II), forward pinout orientation, lead-free (Pb-free) compliant per RoHS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS62WV12816BLL-70NLI and R1LV0216R-70JL, the CY62137VLL-70ZSXET delivers lower standby current, integrated power-down logic, and automotive qualification - making it optimal for battery-powered and mission-critical embedded systems where reliability and energy efficiency are co-prioritized.

Availability

CY62137VLL-70ZSXET is available at Aetrix Electronics and suitable for cellular modem design, industrial HMI development, and automotive telematics ECU production requiring stable component supply across extended temperature ranges and long lifecycle support.

Supply support for CY62137VLL-70ZSXET 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 fabless semiconductor company specializing in programmable system-on-chip (PSoC), memory, and USB-C solutions for industrial, automotive, and consumer markets.

The CY62137V series belongs to Cypress's MoBL® (More Battery Life) SRAM product line, engineered specifically for ultra-low-power portable electronics where extended battery runtime and rapid wake-from-standby are essential design requirements.

FAQ

What is the minimum VCC required to retain data in CY62137VLL-70ZSXET?

Data retention is guaranteed down to VCC = 1.0 V, with typical retention current ICCDR of 0.5 µA (industrial) and 10 µA (automotive) at that voltage. This enables use with small backup capacitors in power-fail scenarios, supporting >24-hour hold-up time in medical and industrial logging applications.

Does CY62137VLL-70ZSXET require external pull-up resistors on BHE/BLE pins?

No. BHE and BLE are CMOS-compatible active-low inputs with no internal pull-ups; however, they must be driven actively to VCC or GND in normal operation. Leaving them floating is prohibited - external pull-up or pull-down is required only in reset/hardware initialization states per system design.

Can CY62137VLL-70ZSXET operate reliably at 3.6 V and +85°C continuously?

Yes. The industrial-grade CY62137VLL-70ZSXET is fully characterized and guaranteed for continuous operation at VCC = 3.6 V and TA = +85°C, with ICC ≤ 20 mA (max) and tRC ≤ 70 ns. Thermal resistance ΘJA = 60 °C/W ensures junction temperature remains within safe limits on standard 2-layer PCBs.

How does the automatic power-down feature activate without software control?

Power-down activates autonomously when CE is HIGH or when address lines remain stable for >100 ns (per internal timer). No firmware or external logic is needed - the internal circuit monitors CE state and address transitions, reducing ICC to ISB2 levels within 70 ns (tPD) after CE goes HIGH.