Infineon Technologies CY7C1021CV33-8ZXCT

Overview

CY7C1021CV33-8ZXCT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 8 ns access time, 3.3 V supply, and independent byte write control via BHE/ BLE pins. It supports commercial (0°C to 70°C) and industrial (–40°C to 85°C) temperature ranges, features automatic CE-controlled power-down (ISB2 = 5 mA), and is packaged in a 44-pin TSOP II (ZXC suffix). It serves as main data buffer in real-time industrial controllers requiring deterministic low-latency memory access.

For engineers reviewing the CY7C1021CV33-8ZXCT datasheet, CY7C1021CV33-8ZXCT pinout, CY7C1021CV33-8ZXCT application, or CY7C1021CV33-8ZXCT equivalent, key selection criteria include tAA ≤ 8 ns read timing, dual-byte enable architecture for partial-word writes, CMOS-compatible 3.3 V I/O levels, and TSOP II package compatibility with legacy SRAM footprints in space-constrained embedded systems.

Technical Context

The CY7C1021CV33-8ZXCT implements a synchronous, address-decoded 64K × 16-bit memory array with separate row/column decoders and sense amplifiers. Its operation relies on three active-low control signals-CE, OE, and WE-with byte-level granularity managed by BHE (IO9–IO16) and BLE (IO1–IO8).

It uses TTL- and CMOS-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), delivers VOH ≥ 2.4 V at –4 mA, and maintains VOL ≤ 0.4 V at 8 mA. Power management includes two standby modes: ISB1 (15 mA, TTL inputs) and ISB2 (5 mA, CMOS inputs), triggered automatically when CE is deasserted.

Key Specifications

Pinout & Package

Package: 44-pin TSOP II (Type II, 400-mil width), RoHS-compliant, surface-mount. Pin pitch: 0.8 mm. Body dimensions: 18.4 mm × 10.16 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed parallel SRAM applications.

Compared with IS61LV102416AL-8TLI and AS6C1008-8TIN, the CY7C1021CV33-8ZXCT uniquely combines hardware-enforced byte masking, guaranteed 5 mA ISB2, and full automotive-A qualification-making it optimal for safety-critical, low-power, and mixed-width interface applications.

Availability

CY7C1021CV33-8ZXCT is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, FPGA configuration systems, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY7C1021CV33-8ZXCT 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.

The CY7C1021CV33 belongs to Cypress's parallel SRAM product line, engineered specifically for deterministic, low-latency data buffering in real-time embedded systems where predictability trumps density or serial interface flexibility.

FAQ

Is CY7C1021CV33-8ZXCT pin-compatible with CY7C1021BV33?

Yes-CY7C1021CV33-8ZXCT is functionally and pin-compatible with CY7C1021BV33, sharing identical 44-pin TSOP II pinout, address/data/control signal mapping, and byte-enable architecture. The 'V33' suffix denotes 3.3 V operation for both, and timing parameters are aligned for 8 ns speed grade. No PCB redesign is required for migration.

What is the maximum capacitive load supported on IO pins?

The CY7C1021CV33-8ZXCT specifies COUT = 8 pF maximum per IO pin under standard test conditions (TA = 25°C, f = 1 MHz, VCC = 3.3 V). This value governs trace length and fan-out limits; exceeding it risks violating tDOE (5 ns) and tHZOE (4 ns) timing margins in high-speed bus implementations.

Does this SRAM require an external clock signal?

No-CY7C1021CV33-8ZXCT is an asynchronous static RAM and operates without a clock. All timing is governed by setup/hold relationships among CE, OE, WE, BHE, BLE, and address transitions. No clock generation or synchronization circuitry is needed, simplifying system timing design.

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

Yes-asserting both BLE and BHE LOW enables concurrent writing to all 16 IO lines (IO1–IO16). The device treats this as a full-word write; no timing penalty or conflict occurs. This mode is electrically and functionally identical to asserting only CE and WE LOW with both byte enables active.