Infineon Technologies CY7C1020CV33-15ZSXE

Overview

CY7C1020CV33-15ZSXE from Cypress Semiconductor is a 512 Kbit (32 K × 16) asynchronous CMOS static RAM with 3.3 V supply, 15 ns access time, automatic CE-controlled power-down, and independent byte write enable (BHE/BLE) for 16-bit data bus segmentation. It operates across industrial temperature range (–40 °C to +85 °C) and is used in real-time control buffers, FPGA configuration storage, and legacy industrial PLC memory expansion.

For engineers reviewing the CY7C1020CV33-15ZSXE datasheet, CY7C1020CV33-15ZSXE pinout, CY7C1020CV33-15ZSXE application, or CY7C1020CV33-15ZSXE equivalent, key selection criteria include tAA = 15 ns read access, ISB2 = 5 mA CMOS standby current, dual-byte write control, TSOP II package compatibility, and automotive-grade thermal derating support up to 125 °C junction.

Technical Context

The CY7C1020CV33-15ZSXE implements a fully static 32,768 × 16-bit memory array with TTL/CMOS-compatible inputs and bidirectional I/O1–I/O16 pins. Its read/write control logic requires simultaneous CE LOW and OE LOW (read) or WE LOW (write), with BHE/BLE enabling selective 8-bit writes without affecting the opposite byte lane.

Power management relies on automatic CE-driven transition into low-power mode (ISB2 = 5 mA max) when CE is HIGH under CMOS input conditions. The device uses separate address decoding paths for row (A0–A14) and column selection, with no internal refresh circuitry-consistent with true SRAM architecture.

Key Specifications

Pinout & Package

44-pin Thin Small Outline Package (TSOP Type II), 0.8 mm pitch, 12.0 × 20.0 mm body size, JEDEC MO-141AC compliant. Pin 1 marked by notch or dot; top view orientation per datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-15TQLI and AS6C4008-15TIN, the CY7C1020CV33-15ZSXE uniquely delivers pin-compatible byte-select capability in the 44-pin TSOP II form factor-critical for maintaining legacy timing margins and eliminating external logic in industrial control upgrades.

Availability

CY7C1020CV33-15ZSXE is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration storage, and legacy embedded system memory expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY7C1020CV33-15ZSXE 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 fabless semiconductor company specializing in memory, microcontrollers, and programmable system-on-chip solutions for industrial, automotive, and consumer applications.

The CY7C1020CV33 belongs to Cypress's legacy high-speed asynchronous SRAM product line, designed specifically for deterministic, low-latency memory interfacing in real-time embedded systems where refresh-free operation and predictable timing are essential.

FAQ

What is the maximum operating frequency supported by CY7C1020CV33-15ZSXE?

The device does not operate on a clock signal-it is an asynchronous SRAM. Its maximum effective throughput is determined by the 15 ns access time (tAA), enabling reliable operation with bus cycles as short as 15 ns. For a 33 MHz bus, this allows one full read or write per cycle without wait states, assuming proper setup/hold timing compliance.

Can CY7C1020CV33-15ZSXE be used with a 5 V microcontroller interface?

No-CY7C1020CV33-15ZSXE is strictly a 3.3 V device with VIH = 2.0 V minimum and VIL = 0.8 V maximum. Direct connection to 5 V logic violates absolute maximum ratings and risks damage. A level-shifting solution such as TXB0108 or discrete resistor-divider networks with Schmitt-trigger receivers is required for safe interfacing.

Does this SRAM require periodic refresh cycles like DRAM?

No. The CY7C1020CV33-15ZSXE is a true static RAM with six-transistor (6T) memory cells. It retains data indefinitely as long as VCC is applied and ambient temperature remains within specification-no external refresh controller, timer, or hidden refresh overhead is needed.

What is the purpose of NC pins 1, 22, 23, and 28 in the TSOP II package?

These pins are physically present but not connected to the silicon die (No Connect). They must remain unconnected on the PCB-neither tied to VCC, VSS, nor routed-to avoid parasitic coupling or unintended ESD paths. Their presence maintains mechanical symmetry and standardizes the TSOP II footprint across Cypress's memory portfolio.