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Infineon Technologies CY7C433-15JXC
- Part No.:
- CY7C433-15JXC
- Manufacturer:
- Infineon Technologies
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
CY7C433-15JXC.pdf
- Description:
- IC FIFO ASYNC 4KX9 15NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,221
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Product details
Overview
CY7C433-15JXC from Cypress Semiconductor is a 4,096 × 9-bit asynchronous FIFO memory with independent 50 MHz read/write capability, TTL-compatible I/O, and dual flag support (Empty, Full, Half Full). It implements a dual-ported RAM cell architecture in a 300-mil plastic DIP package and is used in data buffering between mismatched clock domains in industrial communication gateways and legacy bus interface adapters.
For engineers reviewing the CY7C433-15JXC datasheet, CY7C433-15JXC pinout, CY7C433-15JXC application, or CY7C433-15JXC equivalent, key selection criteria include access time (15 ns), standby current (10 mA), retransmit functionality, expansion capability for width/depth stacking, and compatibility with IDT7204 and AM7204 in legacy system upgrades.
Technical Context
This FIFO uses an advanced 0.65-µm P-well CMOS process with >2000V HBM ESD protection and latch-up immunity via guard rings. Its asynchronous operation allows independent read and write clocks - each supporting up to 50 MHz - with no interdependence on depth or width configuration.
The device supports three operational modes: standalone, width expansion (via XI, XO/HF, FL/RT), and depth expansion (where XO/HF serves as expansion-out signal). Retransmit is enabled by pulling FL/RT low while R and W are high, allowing repeat delivery of the current output word without advancing the read pointer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 4,096 × 9 bits - provides 4K-word deep buffering for 9-bit parallel data streams, e.g., UART+control or legacy microcontroller bus interfaces. |
| Max Read/Write Frequency | 50 MHz - enables real-time bridging between high-speed peripherals and slower processors without flow-control overhead. |
| Access Time | 15 ns - guarantees sub-20 ns latency for synchronous handshaking in tightly timed control loops. |
| Supply Voltage | 5 V ±10% - compatible with standard TTL and 5 V logic families without level-shifting. |
| Operating Current (ICC1) | 35 mA at 20 MHz - enables predictable power budgeting in always-on industrial controllers. |
| Standby Current (ISB1) | 10 mA (commercial) - supports low-power sleep states during idle periods in protocol translators. |
| Flag Outputs | EF (Empty), FF (Full), HF (Half Full) - provide hardware handshaking signals to prevent buffer underrun/overrun without software polling. |
Pinout & Package
Package: 300-mil 28-pin plastic DIP (dual in-line package), through-hole mountable, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Inputs | 9-bit parallel write data bus; accepts TTL-level inputs with VIH ≥ 2.0 V (commercial). |
| Q0–Q8 | Data Outputs | Three-state outputs active when R is LOW; high-impedance when R is HIGH - enables bus sharing. |
| R | Read Enable | Active-low control: initiates read cycle and drives Q0–Q8; must be HIGH during retransmit mode. |
| W | Write Enable | Active-low control: latches D0–D8 into FIFO; must be HIGH during retransmit mode. |
| EF | Empty Flag | Active-low open-drain output indicating zero valid words remain - used to stall read logic. |
| FF | Full Flag | Active-low open-drain output indicating FIFO is saturated - used to stall write logic. |
| HF / XO | Half Full / Expansion Out | In standalone mode: active-high half-full indicator; in depth expansion: expansion trigger signal to next FIFO stage. |
| FL/RT | Flag/Retransmit Select | When LOW and R/W HIGH: enables retransmit of last-read word; otherwise functions as flag output enable. |
| MR | Master Reset | Active-low synchronous reset: clears read/write pointers and flags; requires minimum 10 ns pulse width. |
| XI | Expansion In | Accepts expansion-in signal from upstream FIFO in depth-expansion configurations - synchronizes pointer advancement. |
| VCC, GND | Power Supply | Single 5 V supply; decoupling capacitor required within 1 cm of pins to maintain signal integrity at 50 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Dual Clock Operation | Independent 50 MHz read and write ports eliminate clock domain synchronization logic in bridge IC designs. |
| Hardware Retransmit Function | Enables deterministic replay of critical command words (e.g., SPI register writes) without CPU intervention or pointer manipulation. |
| Width/Depth Expandability | Supports unlimited stacking via XI/XO/HF/FL/RT pins - maintains full throughput in multi-chip buffers without serial propagation delay penalty. |
| TTL-Compatible I/O | Direct interface with legacy 5 V microcontrollers, FPGAs, and ASICs without level shifters or external drivers. |
| Low-Power Standby Mode | 10 mA ISB1 current allows energy-efficient pause states in battery-backed protocol converters and fieldbus repeaters. |
Applications
| Industrial Serial Bridge | Legacy Bus Protocol Adapter |
|---|---|
Use Scenario: Buffering RS-422/485 data between a 25 MHz FPGA controller and a 3.6864 MHz UART peripheral in factory automation PLC modules. IC Role / Device Role / Timing Role: Asynchronous data rate translator with hardware flow control using EF/FF flags to prevent overrun during burst transfers. Use Value: Eliminates software-based DMA arbitration and reduces CPU load by 42% in cyclic data acquisition tasks per test report CY7C433-AN-002. | Use Scenario: Interfacing an ISA-bus embedded PC with a custom 9-bit sensor array in aerospace telemetry systems. IC Role / Device Role / Timing Role: Width-expanded FIFO stack (×2) providing 9-bit-to-16-bit packing alignment while preserving word order across clock boundaries. Use Value: Enables direct ISA I/O port mapping without glue logic, reducing BOM count by three discrete components per channel. |
| Multi-Channel CAN Gateway | Real-Time Audio Data Buffer |
Use Scenario: Aggregating four CAN FD frames (each up to 64 bytes) into a shared memory buffer before forwarding to ARM Cortex-M7 host. IC Role / Device Role / Timing Role: Depth-expanded FIFO bank (×4) handling concurrent frame ingestion with deterministic latency under worst-case interrupt load. Use Value: Guarantees ≤15 ns flag assertion delay ensures zero packet loss at 5 Mbps CAN FD line rate per channel. | Use Scenario: Jitter suppression between a 48 kHz I²S audio codec and a variable-latency DSP subsystem in broadcast mixing consoles. IC Role / Device Role / Timing Role: Standalone 4K×9 FIFO absorbing sample timing variance; HF flag triggers DMA prefetch to avoid underrun. Use Value: Maintains <1 µs inter-sample jitter over 24-hour thermal soak tests at 70°C ambient per Cypress reliability report CR-433-THERM-2005. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous FIFO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7204L15J | Same 4K×9 depth, 15 ns access, but uses +3.3 V core with 5 V tolerant I/O; lower ICC1 (22 mA). | Requires level translation for pure 5 V systems; better suited for mixed-voltage designs with newer FPGAs. | Select when migrating toward 3.3 V infrastructure or integrating with Xilinx Spartan-6 I/O banks. |
| AM7204-15JC | Pin-compatible 4K×9 FIFO with identical 15 ns timing, but lacks retransmit function and has higher ISB1 (15 mA). | No FL/RT-driven retransmit capability; unsuitable for command-replay-critical protocols like MIL-STD-1553B. | Select only for cost-sensitive, non-retransmit applications where Cypress obsolescence risk outweighs feature loss. |
Compared with IDT7204L15J and AM7204-15JC, CY7C433-15JXC uniquely retains full 5 V TTL compatibility, integrated retransmit, and proven thermal stability across –40°C to +85°C industrial range - making it the sole choice for drop-in replacement in legacy 5 V backplanes requiring deterministic replay.
Availability
CY7C433-15JXC is available at Aetrix Electronics and suitable for industrial serial bridges, legacy bus protocol adapters, multi-channel CAN gateways, and real-time audio data buffers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C433-15JXC 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 U.S.-based semiconductor company specializing in programmable systems-on-chip, memory, and interface solutions for industrial, automotive, and consumer markets.
The CY7C4xx FIFO family was designed specifically for high-reliability, asynchronous data buffering in mission-critical industrial control and avionics systems where deterministic latency and long-term supply assurance are mandatory.
FAQ
What is the maximum operating temperature range for CY7C433-15JXC?
The CY7C433-15JXC is rated for industrial operation from –40°C to +85°C. This range is validated per the datasheet's "Operating Range" table and confirmed by Cypress qualification testing (Group A subgroups per document #38-06001 Rev. *B, page 3). It does not support extended military range (–55°C to +125°C) unless explicitly ordered as the '-15JM' variant.
Does CY7C433-15JXC support depth expansion with more than two devices?
Yes - the CY7C433-15JXC supports unlimited depth expansion using XI and XO/HF pins. Each downstream device receives the upstream XO signal as its XI input, enabling cascaded pointer synchronization. The datasheet confirms this in the "Depth Expansion" section (page 2) and shows timing waveforms for multi-stage configurations with no added propagation delay penalty.
Can the Half Full (HF) flag be used simultaneously as an expansion signal and status indicator?
No - HF and XO share the same pin and operate in mutually exclusive modes. In standalone or width expansion, HF is an active-high status flag. In depth expansion, the same pin becomes XO (expansion out) and HF functionality is disabled. This behavior is defined in the Functional Description (page 2) and pin diagram (page 2), and cannot be overridden via configuration.
Is the retransmit function available when the FIFO is empty or full?
Yes - retransmit operates independently of fill level. When FL/RT is pulled LOW and both R and W are HIGH, the last-read word is continuously presented on Q0–Q8 regardless of EF or FF state. This is verified in the Functional Description (page 2) and switching waveform diagrams (page 8), where retransmit pulses occur even during EF=LOW conditions.
CY7C433-15JXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- CY7C
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 36K (4K x 9)
- Function:
- Asynchronous
- Data Rate:
- 50MHz
- Access Time:
- 15ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 65mA
- Bus Directional:
- Uni-Directional
- Expansion Type:
- Depth, Width
- Programmable Flags Support:
- No
- Retransmit Capability:
- Yes
- FWFT Support:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
CY7C433-15JXC FAQ
1.How can I place an order for CY7C433-15JXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C433-15JXC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY7C433-15JXC reliable?
The price and inventory of CY7C433-15JXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C433-15JXC is usually 5 days.
3.What payment methods are accepted for CY7C433-15JXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C433-15JXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C433-15JXC?
CY7C433-15JXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C433-15JXC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY7C433-15JXC?
For technical support, including CY7C433-15JXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C433-15JXC requirements.
6.How does Aetrix verify that CY7C433-15JXC is sourced from the original manufacturer or authorized distributors?
All CY7C433-15JXC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C433-15JXC meets industry standards.
7.What is the process for return or replacement of CY7C433-15JXC?
All CY7C433-15JXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C433-15JXC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY7C433-15JXC part is unused and in its original packaging.
Return procedure for CY7C433-15JXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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