Infineon Technologies CY7C1021BNV33L-10VXC

Overview

CY7C1021BNV33L-10VXC from Cypress Semiconductor is a 64K × 16-bit (1,048,576-bit) asynchronous CMOS static RAM with 3.3V operation (3.0–3.6V), 10 ns access time, automatic CE-controlled power-down, and independent byte-wide write enable (BHE/ BLE). It operates in commercial temperature range (0°C to +70°C) and is packaged in a 44-pin 400-mil SOJ. Used for high-speed data buffering in embedded controllers and FPGA co-processor memory subsystems.

For engineers reviewing the CY7C1021BNV33L-10VXC datasheet, CY7C1021BNV33L-10VXC pinout, CY7C1021BNV33L-10VXC application, or CY7C1021BNV33L-10VXC equivalent, key selection criteria include tAA = 10 ns read timing, ISB1 ≤ 40 mA standby current, dual-byte write control, VCC = 3.3V ±10%, and SOJ package compatibility with legacy PCB footprints.

Technical Context

This SRAM implements a fully asynchronous interface with separate chip enable (CE), output enable (OE), and write enable (WE) controls, supporting both CE- and OE-gated read cycles. Its architecture includes independent byte-high (BHE) and byte-low (BLE) enables that allow selective 8-bit writes without affecting adjacent bytes.

The device uses CMOS circuitry to achieve low active power (576 mW max) and ultra-low CMOS standby power (1.80 mW max), enabled by automatic power-down when CE is deasserted. Data retention is guaranteed at VCC ≥ 2.0V with ICCDR ≤ 100 µA, supporting battery-backed hold modes.

Key Specifications

Pinout & Package

Package: 44-pin, 400-mil wide molded SOJ (Surface Mount Outline J-Lead), Pb-free, JEDEC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-10TLI and AS6C4008-10PCN, the CY7C1021BNV33L-10VXC uniquely delivers 64K × 16 density in SOJ-44 with hardware-supported byte masking-enabling precise memory updates without software overhead in resource-constrained embedded systems.

Availability

CY7C1021BNV33L-10VXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration memory, medical imaging frame buffering, and automotive ADAS pre-processing cache requiring stable component supply across multi-year production cycles.

Supply support for CY7C1021BNV33L-10VXC 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 analog/digital ICs for industrial, automotive, and communications markets.

The CY7C1021BNV series was designed specifically for high-reliability, low-power asynchronous SRAM applications in embedded systems where predictable timing, byte-selective writes, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency supported by CY7C1021BNV33L-10VXC?

The device does not operate on a clock signal-it is an asynchronous SRAM. Its maximum effective throughput is determined by tRC = 10 ns, enabling up to 100 million read/write cycles per second in ideal conditions. System-level bandwidth depends on bus arbitration, controller latency, and external loading, not internal clocking.

Can CY7C1021BNV33L-10VXC be used with 5V-tolerant microcontrollers?

No. All inputs (A0–A15, CE, OE, WE, BHE, BLE) have absolute maximum voltage ratings of VCC + 0.5 V. With VCC = 3.3 V, input voltage must stay below 3.8 V. Direct connection to 5V logic requires level-shifting circuitry to avoid damage or undefined behavior.

Does this SRAM retain data when VCC drops below 3.0V?

Yes-data retention is guaranteed down to VCC = 2.0 V, provided CE remains HIGH and input voltages stay within VCC ±0.3 V. At 2.0 V, ICCDR is ≤100 µA, allowing extended hold time using a small backup capacitor or coin cell.

Is the 44-pin SOJ package RoHS-compliant?

Yes. The "VXC" suffix in CY7C1021BNV33L-10VXC explicitly denotes Pb-free (RoHS-compliant) construction per Cypress ordering nomenclature. Package diagram 51-85082 confirms compliance with JEDEC standards for lead-free SOJ packaging.