Infineon Technologies CY7C1021CV33-15VXC

Overview

CY7C1021CV33-15VXC from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, 3.3 V supply, and automatic CE-controlled power-down mode. It supports independent byte write via BHE/BLE inputs and operates across industrial temperature range (–40°C to +85°C) in 44-pin SOJ package. Used in real-time data buffering for industrial controllers and network packet memory.

For engineers reviewing the CY7C1021CV33-15VXC datasheet, CY7C1021CV33-15VXC pinout, CY7C1021CV33-15VXC application, or CY7C1021CV33-15VXC equivalent, key selection criteria include tAA = 15 ns read timing, dual-byte enable architecture, CMOS-compatible 3.3 V I/O, low active power (max 325 mW), and industrial-grade thermal resistance (ΘJA = 65.06°C/W in SOJ).

Technical Context

The CY7C1021CV33-15VXC implements a synchronous 64K × 16 SRAM array with TTL/CMOS-compatible inputs and bidirectional IO1–IO16 data bus. Its read cycle is controlled by CE/OE timing (tACE = 15 ns, tDOE = 7 ns), while write operations require overlapping CE, WE, and BHE/BLE asserts with tPWE ≥ 10 ns and tSD ≥ 8 ns.

Power management relies on automatic CE-driven transition into standby mode (ISB2 = 5 mA max at VCC = 3.3 V), with fast high-Z output disable (tHZOE = 7 ns) and byte-selectable data path control. The device uses standard address decoding with A0–A15 and supports no-connect (NC) pins per SOJ pinout.

Key Specifications

Pinout & Package

Package: 44-pin 400-mil SOJ (Small Outline J-Lead), lead-free, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS6C1008-15TIN and IS61LV102416-15TQLI, CY7C1021CV33-15VXC uniquely delivers industrial-qualified dual-byte write control in SOJ packaging, enabling direct 16-bit bus integration without glue logic or thermal margin compromise.

Availability

CY7C1021CV33-15VXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, network packet memory, and motor drive control FIFO applications requiring stable component supply, long-term lifecycle assurance, and consistent SOJ package availability.

Supply support for CY7C1021CV33-15VXC 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) designs high-reliability memory and microcontroller solutions for industrial, automotive, and communications infrastructure markets.

CY7C1021CV33 belongs to Cypress's legacy high-speed SRAM product line, engineered specifically for deterministic latency and low-power standby in real-time embedded systems with strict thermal and timing constraints.

FAQ

What is the maximum operating frequency supported by CY7C1021CV33-15VXC?

The device does not operate on a clock signal; its speed is defined by access time (tAA = 15 ns) and cycle time (tRC = 15 ns). This supports effective interface rates up to 66.7 MHz in systems where address and control setup/hold times are met - verified under industrial conditions with 3.3 V supply and load capacitance ≤30 pF.

Can CY7C1021CV33-15VXC be used with 5 V logic interfaces?

No. The device is strictly 3.3 V I/O compatible: VIH(max) = VCC + 0.3 V = 3.6 V, and absolute maximum input voltage is VCC + 0.5 V = 3.8 V. Direct connection to 5 V logic will exceed voltage ratings and cause permanent damage; level translation is mandatory.

How does automatic power-down behave when CE is toggled rapidly?

When CE transitions HIGH, the device enters standby within tPD = 15 ns and draws ISB2 ≤ 5 mA. If CE returns LOW before tPU (100 µs) elapses, internal circuitry powers up fully before first access - no initialization delay beyond tPU is required for subsequent accesses.

Are the NC pins on CY7C1021CV33-15VXC required to be grounded?

No. Pins 22, 23, and 28 are unconnected to the die. Cypress recommends leaving them floating per datasheet Note 1; grounding is permissible but adds no benefit and may increase parasitic capacitance on adjacent signal lines in dense layouts.