Infineon Technologies CY7C1399BNL-15ZXCT

Overview

CY7C1399BNL-15ZXCT from Cypress Semiconductor is a 256K (32K × 8) high-speed CMOS static RAM operating at 3.3 V, with 15 ns maximum access time, industrial temperature range (–40°C to +85°C), and automatic CE-controlled power-down reducing standby current to 500 µA. It supports cache memory in embedded controllers and real-time data buffering in industrial I/O modules.

For engineers reviewing the CY7C1399BNL-15ZXCT datasheet, CY7C1399BNL-15ZXCT pinout, CY7C1399BNL-15ZXCT application, or CY7C1399BNL-15ZXCT equivalent, key selection criteria include TTL/CMOS-compatible control timing, low active power (≤180 mW), tri-state I/O drivers, and Pb-free TSOP I package compatibility with space-constrained PCB layouts.

Technical Context

The CY7C1399BNL-15ZXCT implements a 32K × 8 asynchronous SRAM architecture with independent CE, OE, and WE controls enabling precise read/write gating and seamless memory expansion. Its low-power alpha immune 6T cell ensures radiation-tolerant operation in industrial environments.

It features dual standby modes: ISB1 (5 mA, TTL input thresholds) and ISB2 (500 µA, CMOS input thresholds), with tHZOE = 6 ns and tPD = 15 ns, supporting fast power-state transitions in battery-backed or energy-aware systems.

Key Specifications

Pinout & Package

Package: 28-pin Thin Small Outline Package Type I (TSOP I), 8 mm × 13.4 mm body, 0.55 mm pitch, Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-15TQLI and MC14LC548CDW, the CY7C1399BNL-15ZXCT delivers optimal balance of 8-bit bus alignment, 15 ns speed, industrial temperature support, and 3.3 V efficiency-making it the preferred choice for new designs targeting compact, low-power embedded memory.

Availability

CY7C1399BNL-15ZXCT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ECU cache modules, and medical imaging FIFO applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1399BNL-15ZXCT 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 high-reliability memory, PSoC programmable systems-on-chip, and USB/USB-C solutions for industrial and automotive markets.

The CY7C1399B series was designed specifically for low-voltage, high-speed cache and buffer applications in mission-critical embedded systems where timing predictability and power efficiency outweigh density-per-dollar metrics.

FAQ

What is the minimum VCC required for data retention on CY7C1399BNL-15ZXCT?

Data retention is guaranteed down to VCC = 2.0 V, with ICCDR ≤ 20 µA under those conditions. This allows use with coin-cell backup supplies or brown-out scenarios where main VCC drops but memory contents must persist. The device enters retention mode automatically when CE is deasserted and VCC remains ≥2.0 V.

Does CY7C1399BNL-15ZXCT support concurrent read and write operations?

No. The CY7C1399BNL-15ZXCT is a single-port asynchronous SRAM and does not support true concurrent access. Read and write operations are mutually exclusive and controlled by CE, OE, and WE signal timing per the documented read/write cycle waveforms. Overlapping CE LOW and WE LOW initiates write; OE LOW with WE HIGH enables read.

Can CY7C1399BNL-15ZXCT be used with 5 V logic interfaces?

No. All inputs require VIH ≥ 2.2 V and VIL ≤ 0.8 V referenced to a 3.3 V supply; applying 5 V signals violates absolute maximum ratings (VCC + 0.5 V = 3.8 V max). Level translation is mandatory for interfacing with 5 V microcontrollers or FPGAs, such as using TXB0108 or discrete resistor-divider networks with current limiting.

Is the TSOP I package of CY7C1399BNL-15ZXCT compatible with standard reflow profiles?

Yes. The Pb-free TSOP I package complies with IPC/JEDEC J-STD-020D, including peak reflow temperature of 260°C for ≤30 seconds. Recommended profile uses ramp-up ≤3°C/s, preheat 150–200°C for 60–120 s, soak 200–220°C for 60–120 s, and time above liquidus (217°C) of 60–90 s to ensure void-free solder joints and mechanical reliability.