Infineon Technologies CY7C1020B-12VXC

Overview

CY7C1020B-12VXC 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 in commercial temperature range (0°C to +70°C). Used in embedded controllers, network packet buffers, and real-time data acquisition systems requiring deterministic low-latency memory access.

For engineers reviewing the CY7C1020B-12VXC datasheet, CY7C1020B-12VXC pinout, CY7C1020B-12VXC application, or CY7C1020B-12VXC equivalent, key selection criteria include tAA ≤ 12 ns, ISB2 ≤ 3 mA standby current, dual-byte control architecture, and Pb-free 44-pin SOJ package compatibility with legacy board layouts.

Technical Context

The CY7C1020B-12VXC implements a fully asynchronous SRAM core with separate address latching and bidirectional I/O gating. Its read/write timing is governed by overlapping CE, WE, OE, BHE, and BLE signals-no internal clock or refresh required. The device uses TTL-compatible input thresholds and drives CMOS loads up to 30 pF with guaranteed VOH ≥ 2.4 V and VOL ≤ 0.4 V.

Power management relies on automatic CE-driven transition into low-power standby (ISB2 = 3 mA max), triggered when CE rises above VCC – 0.3 V. Byte-select logic enables partial-word writes without disturbing adjacent bytes, supporting efficient 8-bit peripheral interfacing in mixed-width bus systems.

Key Specifications

Pinout & Package

Package: 44-pin SOJ (400-mil width), Pb-free, RoHS-compliant, body size 19.1 mm × 10.2 mm × 3.3 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV51216AL-12MLI and CY7C1021DV33-12ZXC, the CY7C1020B-12VXC uniquely retains 5 V operation, byte-select capability, and SOJ pinout-making it irreplaceable in legacy 5 V systems requiring partial-word writes without board rework.

Availability

CY7C1020B-12VXC is available at Aetrix Electronics and suitable for industrial PLC data buffers, legacy ISA bus memory expansion, and telecom line card packet FIFOs requiring stable component supply and long-term obsolescence mitigation.

Supply support for CY7C1020B-12VXC 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 logic solutions for industrial, automotive, and communications infrastructure.

The CY7C1020B belongs to Cypress's legacy high-speed asynchronous SRAM product line, engineered specifically for deterministic, low-latency memory interfacing in 5 V embedded control and data acquisition systems.

FAQ

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

No. The CY7C1020B-12VXC is specified only for 5.0 V ±10% operation. Its VIH minimum is 2.2 V and VIL maximum is 0.8 V, but input thresholds and output drive strength (VOH ≥ 2.4 V, VOL ≤ 0.4 V) are optimized for 5 V TTL/CMOS systems. Direct connection to 3.3 V logic requires level-shifting circuitry to avoid undriven inputs or excessive current injection.

What happens to I/O pins during power-up or power-down sequences?

During power-up, all I/O pins remain in high-impedance state until VCC reaches 4.5 V and CE is asserted LOW. During power-down (CE HIGH), outputs enter high-Z within tPD = 12 ns max, preventing bus contention. The device does not require external reset sequencing-the internal power-on reset ensures predictable initial state of outputs and internal latches.

Can CY7C1020B-12VXC perform simultaneous read and write operations?

No. The CY7C1020B-12VXC is a single-port asynchronous SRAM with no internal arbitration or dual-port architecture. Read and write operations are mutually exclusive and controlled by WE state: WE HIGH enables read (with OE LOW), WE LOW initiates write (with CE LOW and BHE/ BLE asserted). Concurrent access causes undefined data or bus contention.

Does the "VXC" suffix indicate lead-free packaging only, or also different electrical specs?

The "VXC" suffix denotes the same electrical specifications and timing as the "VC" variant, with the sole difference being Pb-free (RoHS-compliant) terminations on the 44-pin SOJ package. All AC/DC parameters-including tAA, ISB2, VOH, and VOL-remain identical per the Rev. *C datasheet. No derating or layout changes are required for VXC adoption.