Infineon Technologies CY7C1399BN-12ZXC

Overview

CY7C1399BN-12ZXC from Cypress Semiconductor is a 256-Kbit (32 K × 8) asynchronous CMOS static RAM with 3.3 V single-supply operation, 12 ns access time, industrial temperature range (–40 °C to +85 °C), and automatic CE-controlled power-down mode. It serves as cache or buffer memory in embedded controllers, FPGA configuration storage, and real-time data logging systems where deterministic timing and low standby current are critical.

For engineers reviewing the CY7C1399BN-12ZXC datasheet, CY7C1399BN-12ZXC pinout, CY7C1399BN-12ZXC application, or CY7C1399BN-12ZXC equivalent, key selection criteria include its 12 ns read cycle time, 55 mA max active current, 500 µA CMOS standby current at industrial temp, tristate I/O drivers, and dual-package availability in TSOP-I and SOJ.

Technical Context

The CY7C1399BN-12ZXC implements a full 32 K × 8 asynchronous SRAM array using alpha-immune 6T cell technology, enabling reliable operation in industrial environments. Its control logic relies on three independent active-low enables: Chip Enable (CE), Output Enable (OE), and Write Enable (WE), allowing flexible bus interfacing without external gating.

Timing behavior is defined by overlapping CE/WE assertions for writes and CE/OE co-assertion for reads, with guaranteed tRC = 12 ns, tAA = 12 ns, and tPD = 15 ns power-down entry. The device enters automatic low-power mode when CE is deasserted, reducing ICC to ≤500 µA under CMOS input conditions.

Key Specifications

Pinout & Package

The CY7C1399BN-12ZXC is packaged in a 28-pin Thin Small Outline Package (TSOP-I), 300-mil width, lead-free (RoHS-compliant) construction. Pin numbering follows standard JEDEC top-view orientation with pin 1 marked by a notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-12TLI, the CY7C1399BN-12ZXC avoids bus-width redesign overhead; versus R1LV25616AS-12SI, it trades 200 µA higher standby current for broader legacy design support and Cypress's long-term industrial supply commitment.

Availability

CY7C1399BN-12ZXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration storage, and automotive ADAS sensor hubs requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for CY7C1399BN-12ZXC 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 programmable system-on-chip (PSoC), memory, and USB solutions for industrial, automotive, and consumer applications.

The CY7C1399BN belongs to Cypress's legacy high-speed asynchronous SRAM product line, designed specifically for low-latency, low-voltage embedded memory applications where predictability and reliability outweigh density scaling.

FAQ

What is the maximum clock frequency supported by CY7C1399BN-12ZXC?

The CY7C1399BN-12ZXC is an asynchronous SRAM and does not use a clock signal. Its performance is governed by access time (tAA = 12 ns) and cycle time (tRC = 12 ns), enabling reliable operation with microcontrollers or FPGAs running up to 80 MHz on the address/data bus without synchronization logic.

Does CY7C1399BN-12ZXC require external refresh circuitry?

No. As a static RAM, the CY7C1399BN-12ZXC retains data indefinitely while powered and enabled, with no refresh cycles needed. Its alpha-immune 6T cell design ensures data integrity without periodic access, unlike DRAM or pseudo-SRAM devices.

Can CY7C1399BN-12ZXC operate at 2.5 V?

No. The device is specified exclusively for 3.3 V ±300 mV operation (3.0 V to 3.6 V). Operation below 3.0 V violates the Absolute Maximum Ratings and may result in data corruption, timing violations, or failure to enter power-down mode reliably.

Is the ZXC suffix indicative of RoHS compliance?

Yes. The "ZXC" suffix denotes a lead-free, RoHS-compliant 28-pin TSOP-I package per Cypress ordering nomenclature. This includes matte tin lead finish and halogen-free molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 3 (MSL3).