Infineon Technologies CY7C1021CV33-12ZXIT

Overview

CY7C1021CV33-12ZXIT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 12 ns access time, 3.3 V supply, and industrial temperature range (–40°C to +85°C). It features independent byte write control (BHE/BLE), automatic CE-controlled power-down (ISB2 = 5 mA), and dual 44-pin SOJ/TSOP II or 48-ball FBGA packaging. Used in real-time industrial controllers requiring deterministic memory access and low standby power.

For engineers reviewing the CY7C1021CV33-12ZXIT datasheet, CY7C1021CV33-12ZXIT pinout, CY7C1021CV33-12ZXIT application, or CY7C1021CV33-12ZXIT equivalent, this page delivers verified timing parameters (tAA = 12 ns), byte-enable logic behavior, power-down current (5 mA), and package-specific pin mapping for SOJ/TSOP II and FBGA footprints.

Technical Context

The CY7C1021CV33-12ZXIT implements a synchronous, non-volatile-independent SRAM array with full address decoding (A0–A15) and bidirectional I/O (IO1–IO16). Its read cycle is controlled by CE/OE coordination, while write operations require simultaneous assertion of CE, WE, and either BHE or BLE - enabling true 8-bit granularity writes without external logic.

It supports two distinct power states: active mode (ICC ≤ 85 mA at fMAX) and automatic CE-driven power-down (ISB2 = 5 mA), with guaranteed tPD = 12 ns transition from active to standby. Input thresholds meet 3.3 V CMOS levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and output drive complies with TTL-compatible VOH ≥ 2.4 V / VOL ≤ 0.4 V under load.

Key Specifications

Pinout & Package

Package: 44-pin 400-mil Small Outline J-Lead (SOJ) / Thin Small Outline Package II (TSOP II), RoHS-compliant, lead-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV102416-12MLI and AS6C1008-12ZIN, the CY7C1021CV33-12ZXIT uniquely delivers pin-compatible upgrade path from CY7C1021BV33, integrated byte-write control, and industrial-qualified SOJ/TSOP II packaging - making it optimal for legacy system modernization with minimal hardware change.

Availability

CY7C1021CV33-12ZXIT is available at Aetrix Electronics and suitable for industrial automation, automotive ECU subsystems, and medical imaging front-ends requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for CY7C1021CV33-12ZXIT 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 mixed-signal ICs for industrial, automotive, and aerospace applications, with focus on signal integrity and long-term manufacturability.

The CY7C1021CV33 belongs to Cypress's high-speed parallel SRAM product line, engineered specifically for deterministic, low-latency data buffering in real-time embedded systems where bus timing predictability and thermal robustness are critical.

FAQ

Is CY7C1021CV33-12ZXIT pin-compatible with CY7C1021BV33?

Yes - CY7C1021CV33-12ZXIT maintains identical pinout, signal definitions, and AC/DC electrical specifications with CY7C1021BV33. The 'V' suffix denotes voltage-tolerant inputs and improved power-down behavior, but no PCB or firmware changes are required for drop-in replacement in existing SOJ/TSOP II layouts.

What is the maximum clock frequency supported for reliable read/write cycles?

The device does not use a clock; it is asynchronous. Maximum reliable bus frequency is determined by tRC = 12 ns, supporting up to 83 MHz (1/12 ns) for consecutive random accesses. For burst transfers, sustained throughput depends on address setup/hold and byte-enable timing - all specified in the switching characteristics table on page 6 of Rev. *H.

Can BHE and BLE be asserted simultaneously for full 16-bit writes?

Yes - asserting both BHE and BLE LOW while CE and WE are LOW enables simultaneous write to all 16 I/O lines (IO1–IO16). This is explicitly supported in the functional description and truth table (page 9), and no timing penalty or conflict occurs when both byte enables are active.

Does CY7C1021CV33-12ZXIT support hot insertion or live swapping?

No - the device lacks hot-swap protection circuitry. IO pins enter high-impedance state only after VCC is stable and CE is deasserted; applying signals before power-up or removing VCC while CE is LOW may cause latch-up or data corruption. Always follow power sequencing guidelines in AN1064.