Infineon Technologies CY7C1021DV33-10VXI

Overview

CY7C1021DV33-10VXI from Cypress Semiconductor is a 1-Mbit (64 K × 16) high-speed CMOS static RAM with 10 ns access time, 3.3 V supply, industrial/automotive-A temperature range (–40 °C to +85 °C), automatic CE-controlled power-down, and independent byte enable (BHE/BLE) for 16-bit data bus segmentation. It serves as main or buffer memory in real-time control systems requiring deterministic low-latency read/write.

For engineers reviewing the CY7C1021DV33-10VXI datasheet, CY7C1021DV33-10VXI pinout, CY7C1021DV33-10VXI application, or CY7C1021DV33-10VXI equivalent, key selection criteria include tAA ≤ 10 ns, ISB2 ≤ 3 mA standby current, VCC = 3.3 V ± 0.3 V operation, byte-select capability, and Pb-free 44-pin SOJ package compatibility.

Technical Context

This SRAM implements a synchronous, address-decoded 65,536 × 16-bit array with dual-byte write control via separate BHE and BLE inputs, enabling partial-word writes without external logic. Its automatic CE-driven power-down mode reduces ICC to 3 mA when CE > VCC – 0.3 V under CMOS input conditions.

Read operations require CE and OE LOW with WE HIGH; write operations require CE and WE LOW, with data latched on the falling edge of the last active enable (CE, WE, or byte enable). Output high-impedance is enforced during deselection, output disable, or write cycles - eliminating bus contention in multi-device systems.

Key Specifications

Pinout & Package

Package: 44-pin 400-mil wide molded SOJ (Small Outline J-Lead), Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS6C1008-10TIN and IS61LV102416-10ML, CY7C1021DV33-10VXI uniquely combines 16-bit organization, true dual-byte enables, and 3 mA CMOS standby in a single 44-pin SOJ package-enabling simpler, lower-power, and more deterministic memory subsystems in resource-constrained embedded designs.

Availability

CY7C1021DV33-10VXI is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ECU calibration storage, and medical infusion pump runtime variable storage requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY7C1021DV33-10VXI 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 programmable solutions for industrial, automotive, and aerospace applications, with emphasis on signal integrity and long-term manufacturability.

The CY7C1021DV33 belongs to Cypress's legacy high-speed SRAM product line, engineered specifically for deterministic, low-latency, and low-power embedded memory in mission-critical real-time systems.

FAQ

What is the minimum VCC required to retain data in CY7C1021DV33-10VXI?

Data retention is guaranteed down to 2.0 V VCC, with ISB2 ≤ 3 mA at that voltage. The device maintains stored contents as long as VCC remains ≥ 2.0 V and CE is held HIGH under CMOS input conditions (CE > VCC – 0.3 V). No clock or refresh is needed during retention mode.

Can CY7C1021DV33-10VXI operate with mixed 3.3 V and 5 V logic interfaces?

No. All inputs (CE, WE, OE, BHE, BLE, A0–A15) and I/O pins (I/O0–I/O15) are strictly 3.3 V tolerant with VIH(max) = VCC + 0.3 V and VIL(min) = –0.3 V. Direct connection to 5 V logic violates absolute maximum ratings and risks latch-up or permanent damage.

How does automatic power-down behave when CE is driven by TTL-level signals?

When CE is driven by TTL inputs (VIH ≥ 2.0 V), ISB1 ≤ 10 mA applies instead of ISB2. The device still enters power-down, but consumes up to 10 mA rather than 3 mA. For lowest standby current, ensure CE > VCC – 0.3 V and all other inputs meet CMOS threshold conditions.

Is the 44-pin SOJ package of CY7C1021DV33-10VXI compatible with CY7C1021CV33 layouts?

Yes - CY7C1021DV33-10VXI is pin-and function-compatible with CY7C1021CV33 in the same 44-pin SOJ package. Signal assignments, power/ground pin locations, and timing parameters match exactly, enabling direct replacement without PCB redesign.