Infineon Technologies CY7C1020B-12ZXCT

Overview

CY7C1020B-12ZXCT from Cypress Semiconductor is a 32K × 16-bit (512 Kbit) high-speed CMOS static RAM with 12 ns access time, 5 V supply, and automatic CE-controlled power-down. It supports independent byte-wide write enable via BHE/BLE pins and operates across commercial temperature range (0°C to +70°C) in 44-pin TSOP II package. Used in real-time data buffering for industrial controllers and legacy embedded systems requiring deterministic read/write timing.

For engineers reviewing the CY7C1020B-12ZXCT datasheet, CY7C1020B-12ZXCT pinout, CY7C1020B-12ZXCT application, or CY7C1020B-12ZXCT equivalent, key selection criteria include tAA ≤ 12 ns, ISB2 ≤ 3 mA standby current, byte-select capability, TSOP II mechanical compatibility, and 5 V single-supply operation.

Technical Context

The CY7C1020B-12ZXCT implements a synchronous, non-volatile-independent SRAM array with full address decoding (A0–A14), dual-byte I/O control (I/O1–I/O8 and I/O9–I/O16), and TTL/CMOS-compatible input thresholds. Its read cycle is initiated by concurrent CE and OE low with WE high, while write requires CE and WE low plus active BLE or BHE.

Power management relies on automatic CE-driven transition into low-power standby (ISB2 = 3 mA max) when CE is deasserted. Output impedance control is hardware-gated by CE, OE, BLE, and BHE - all four signals must be inactive to force high-Z state during deselect or disable.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package Type II (TSOP II), 400-mil body width, lead-free (Pb-free) variant per ordering suffix "X".

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV51216AL-12TLI and MC14L51216FN12, the CY7C1020B-12ZXCT uniquely combines 5 V operation, true dual-byte enable (BLE/BHE), TSOP II Pb-free packaging, and sub-3 mA CMOS standby - making it irreplaceable in space-constrained, 5 V industrial designs requiring pin-identical upgrades.

Availability

CY7C1020B-12ZXCT is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy medical instrument memory, and military avionics display cache requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1020B-12ZXCT 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 U.S.-based semiconductor company specializing in memory, microcontrollers, and programmable solutions for industrial, automotive, and consumer applications.

The CY7C1020B belongs to Cypress's legacy high-speed CMOS SRAM product line, designed specifically for deterministic, low-latency data buffering in 5 V microprocessor and microcontroller systems where refresh-free operation and byte-select flexibility are mandatory.

FAQ

Is CY7C1020B-12ZXCT compatible with 3.3 V logic interfaces?

No. The CY7C1020B-12ZXCT is specified for 5 V ±10% operation only. Input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive levels (VOH = 2.4 V min at –4 mA) are designed for 5 V TTL/CMOS compatibility. Direct connection to 3.3 V logic requires level translation to avoid overvoltage damage or marginal timing.

Does CY7C1020B-12ZXCT require an external clock or refresh circuitry?

No. As a static RAM, the CY7C1020B-12ZXCT retains data indefinitely while powered and does not require clock input or periodic refresh cycles. All timing is controlled by CE, OE, WE, and byte-enable signal edges - no oscillator or refresh controller is needed.

What is the function of NC pins on the CY7C1020B-12ZXCT TSOP II package?

Pins 11, 12, 31, and 32 are No Connect (NC) - physically present but not bonded to the die. They must remain unconnected in layout; routing traces or applying voltage to these pins may cause internal stress or latch-up. Refer to Pin Configuration diagram on page 2 of datasheet 38-05171 Rev. *C.

Can CY7C1020B-12ZXCT operate in extended temperature ranges?

No. The CY7C1020B-12ZXCT is rated only for commercial temperature range (0°C to +70°C). While some units may function outside this range, electrical characteristics including tAA, ISB2, and VOH/VOL are guaranteed only within spec limits. Industrial or automotive variants (e.g., -40°C to +85°C) were not released for this part number.