Infineon Technologies CY7C419-10JXCT

Overview

CY7C419-10JXCT 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 (EF), Full (FF), and Half-Full (HF) status flags. It uses a dual-ported RAM cell architecture in a 32-pin PLCC package and supports retransmit functionality for data recovery in serial communication buffers.

For engineers reviewing the CY7C419-10JXCT datasheet, CY7C419-10JXCT pinout, CY7C419-10JXCT application, or CY7C419-10JXCT equivalent, key selection criteria include access time (10 ns), power consumption (35 mA at 20 MHz), standalone retransmit support, and compatibility with width/depth expansion topologies in legacy industrial control and telecom interface designs.

Technical Context

This FIFO implements true asynchronous operation: read and write clocks are fully independent, with no shared timing domain required. The device uses a pointer-based arbitration scheme to manage internal read/write address counters, enabling deterministic flag assertion without external synchronization logic.

It supports three operational modes: standalone (with RT input enabling retransmission), width expansion (using XO/XI pins to cascade 9-bit-wide data paths), and depth expansion (where HF pin becomes expansion-out signal). All modes retain full 50 MHz throughput per port without propagation delay stacking.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7200LA10TPG and AM7200-10JC, CY7C419-10JXCT uniquely delivers retransmit capability and industrial temperature support in the same PLCC footprint-enabling drop-in replacement where protocol recovery or extended environmental operation is mandatory.

Availability

CY7C419-10JXCT is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, legacy telecom line card interfacing, and automotive diagnostic gateway designs requiring stable component supply and long-term obsolescence management.

Supply support for CY7C419-10JXCT 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, and interface solutions for industrial, automotive, and communications markets.

CY7C4xx FIFO family was designed specifically for legacy system upgrades and long-lifecycle embedded applications requiring deterministic asynchronous buffering with minimal external logic-targeting telecom infrastructure, factory automation, and defense electronics.

FAQ

What is the maximum operating temperature range for CY7C419-10JXCT?

The CY7C419-10JXCT is rated for industrial temperature operation from –40°C to +85°C, verified per its datasheet specification table. This range applies when V_CC is maintained at 5.0 V ±10% and all inputs meet VIH/VIL thresholds under worst-case loading. It is not qualified for extended temperature or military-grade operation beyond this range.

Does CY7C419-10JXCT support depth expansion with other CY7C4xx devices?

Yes-depth expansion is supported using the HF pin as expansion-out (XO) and connecting it to the MR input of the next FIFO in chain. The CY7C419-10JXCT must be configured in depth-expansion mode (RT tied HIGH, specific control signal routing), and all devices in the chain must share common W and R lines. Propagation delays do not accumulate due to parallel steering architecture.

Can the retransmit (RT) function operate while the FIFO is simultaneously reading or writing?

No-RT must be asserted only when both R and W are held HIGH. During retransmit, the read pointer remains static, and Q0–Q8 outputs the last-read data word repeatedly until RT returns HIGH. Concurrent read or write operations will corrupt pointer tracking and invalidate flag states.

Is CY7C419-10JXCT RoHS-compliant and lead-free?

Yes-the JXCT suffix denotes a Pb-free (lead-free) PLCC package, compliant with RoHS Directive 2011/65/EU. Cypress confirmed this in Document #38-06001 Rev. *C, Section "Features", and the device meets JEDEC J-STD-020 moisture sensitivity level MSL-3 requirements for surface-mount assembly.