Infineon Technologies CY7C419-10JXC

Overview

CY7C419-10JXC from Cypress Semiconductor is a 256 × 9-bit asynchronous FIFO memory IC with dual-ported RAM architecture, 50 MHz max read/write throughput, TTL-compatible I/O, and independent full/empty flag signaling. It operates at 5V ±10%, supports standalone and width/depth expansion configurations, and is used in data buffering between mismatched clock domains in industrial communication interfaces.

For engineers reviewing the CY7C419-10JXC datasheet, CY7C419-10JXC pinout, CY7C419-10JXC application, or CY7C419-10JXC equivalent, key selection criteria include access time (10 ns), retransmit capability, half-full flag behavior, and PLCC-32 package compatibility with legacy board layouts.

Technical Context

The CY7C419-10JXC implements an asynchronous first-in-first-out buffer using a dual-ported static RAM cell array, enabling independent read and write operations without shared clock constraints. Its control logic uses active-low R and W strobes, with EF/FF/HF flags driven synchronously to internal pointer states.

It supports three operational modes: standalone (with retransmit via RT pin), width expansion (using XO/XI pins for parallel data bus extension), and depth expansion (where HF becomes XO to cascade control signals). The -10 speed grade guarantees t_A ≤ 10 ns and t_RC/t_WC ≤ 20 ns at 5V and 0°C–70°C.

Key Specifications

Pinout & Package

This device is packaged in a 32-pin Plastic Leaded Chip Carrier (PLCC) with J-lead configuration, 1.27 mm pitch, and 11.43 mm × 11.43 mm body size. Pin 1 is marked by a corner notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7200LA-10J and AM7200-10JC, the CY7C419-10JXC uniquely integrates retransmit control and half-full flag multiplexing in a single PLCC-32 package-enabling simpler PCB layout and eliminating external logic for retry-based protocols.

Availability

CY7C419-10JXC is available at Aetrix Electronics and suitable for industrial serial bridges, legacy bus interfacing, test equipment data capture, and digital audio sample buffering requiring stable component supply and long-term obsolescence management.

Supply support for CY7C419-10JXC 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 systems-on-chip, memory, and interface solutions for industrial, automotive, and consumer applications.

The CY7C4xx FIFO family was designed specifically for high-reliability, low-latency data buffering in mixed-clock-domain systems where deterministic timing and hardware-managed flow control are critical.

FAQ

What is the minimum pulse width required for the R and W strobes?

The CY7C419-10JXC requires a minimum t_PR and t_PW of 10 ns for reliable read and write strobe pulses. This is specified in the –10 speed grade switching characteristics table on page 5 of the datasheet. Pulses shorter than this may cause metastability or missed transactions, especially under worst-case voltage and temperature conditions.

Can the HF pin be used simultaneously as a half-full indicator and expansion output?

No-the HF pin functions exclusively as either a half-full flag (in standalone or width expansion mode) or as expansion out (XO) in depth expansion mode. The mode is determined by external wiring: when XI is tied to V_CC, HF operates as HF; when XI is driven by upstream HF, it becomes XO. The datasheet explicitly prohibits concurrent use.

Does the retransmit (RT) function affect the read pointer position?

No-RT does not advance the read pointer. During retransmit, the FIFO outputs the same data word repeatedly while holding the read pointer stationary until RT returns HIGH. Subsequent R pulses resume normal sequential read behavior from the current pointer location, as confirmed in the Functional Description section on page 2.

Is the CY7C419-10JXC RoHS compliant?

Yes-the "JXC" suffix denotes a Pb-free, RoHS-compliant PLCC package per Cypress's product change notice PCN-100117. The device meets JEDEC J-STD-609A Class 3 marking requirements and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.