Infineon Technologies CY7C419-15JXCT

Overview

CY7C419-15JXCT from Cypress Semiconductor is a 256 × 9-bit asynchronous FIFO memory IC with independent 50 MHz read/write capability, TTL-compatible I/O, and integrated Empty/Full/Half-Empty flags. It uses dual-ported RAM architecture in a 32-pin PLCC package and supports retransmit functionality for data recovery in serial communication buffers.

For engineers reviewing the CY7C419-15JXCT datasheet, CY7C419-15JXCT pinout, CY7C419-15JXCT application, or CY7C419-15JXCT equivalent, key selection criteria include access time (15 ns), standby current (10 mA), expansion support via XO/RT pins, and compatibility with IDT7200-series FIFOs in width/depth stacking configurations.

Technical Context

This FIFO implements a first-in-first-out buffer using dual-ported static RAM cells, enabling concurrent read and write operations without arbitration logic. Its asynchronous control allows independent clock domains on R and W inputs, with propagation delays isolated by dedicated flag generation circuitry for EF, FF, and HF signals.

The device supports three operational modes: standalone, width expansion (via D[8:0] steering), and depth expansion (using XO output to cascade control). Retransmit mode is triggered by RT low while R and W are high, enabling deterministic replay of buffered data without external state tracking.

Key Specifications

Pinout & Package

Package: 32-pin Plastic Leaded Chip Carrier (PLCC), 11.43 mm × 11.43 mm, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7200L15TPG and AM7200-15JC, CY7C419-15JXCT uniquely integrates retransmit and half-full flags in PLCC packaging-reducing BOM count and PCB area in systems requiring deterministic data replay or predictive flow management.

Availability

CY7C419-15JXCT is available at Aetrix Electronics and suitable for industrial serial bridges, legacy bus interfacing, test equipment data capture, and digital oscilloscope pre-trigger buffers requiring stable component supply and long-term obsolescence planning.

Supply support for CY7C419-15JXCT 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 markets.

CY7C419 belongs to Cypress's legacy asynchronous FIFO product line, engineered specifically for deterministic data buffering in mixed-clock-domain systems where software-managed queues introduce unacceptable latency or jitter.

FAQ

What is the maximum operating temperature range for CY7C419-15JXCT?

The CY7C419-15JXCT is rated for industrial temperature operation from –40°C to +85°C with 5 V ±10% supply. Its 0.65-μm CMOS process and guard-ring layout ensure latch-up immunity and >2000 V HBM ESD protection across this range, making it suitable for factory-floor and outdoor telecom equipment deployments.

Can CY7C419-15JXCT be used in depth-expanded configurations with different speed grades?

No-depth expansion requires identical speed grades across all cascaded devices. The XO signal timing (tXOL/tXOH = 15 ns max) is calibrated per speed grade; mixing –15 and –20 devices causes setup/hold violations at expansion boundaries, leading to metastability in pointer synchronization and potential data corruption.

How does the retransmit (RT) function interact with the read pointer?

When RT is pulled low with R and W both high, the read pointer resets to address zero and begins sequential output from the first written word. This occurs independently of EF/FF state and does not clear the FIFO contents-enabling immediate replay without data loss or external address management.

Is CY7C419-15JXCT RoHS-compliant and lead-free?

Yes-CY7C419-15JXCT is manufactured in Pb-free PLCC packages per JEDEC J-STD-609A Class 3 standards. The device carries the "Pb-Free" marking on the top surface and meets IPC/JEDEC J-STD-020D moisture sensitivity level 3 requirements for standard SMT assembly processes.