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Texas Instruments SN74ACT7200L15RJ
- Part No.:
- SN74ACT7200L15RJ
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- -
- Datasheet:
-
SN74ACT7200L15RJ.pdf
- Description:
- IC FIFO ASYNC 256X9
- Quantity:
- Payment:
- Shipping:
Inventory:1,752
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Product details
Overview
SN74ACT7200L15RJ from Texas Instruments is a 256 × 9 asynchronous dual-port FIFO memory IC with TTL-compatible inputs, 15 ns data access time, 40 MHz read/write frequency support, and built-in empty/full/half-full status flags. It enables rate buffering between asynchronous buses in data-acquisition systems and communication queues.
For engineers reviewing the SN74ACT7200L15RJ datasheet, SN74ACT7200L15RJ pinout, SN74ACT7200L15RJ application, or SN74ACT7200L15RJ equivalent, key selection criteria include its 32-pin plastic J-leaded chip-carrier (RJ) package, retransmit capability, depth/width expansion logic, and compatibility with IDT7200-series FIFOs.
Technical Context
The SN74ACT7200L15RJ implements a first-in, first-out (FIFO) buffer using dual-port SRAM with independent internal write and read address counters. Its asynchronous operation allows read and write cycles to be coincident or fully independent, with status flag outputs (EF, FF, XO/HF) driven by pointer comparison logic.
It supports both bit-width and word-depth expansion via dedicated XI/XO/HF and FL/RT pins. In single-device mode, XO/HF functions as a half-full flag; in daisy-chained depth expansion, it propagates pointer state to the next device. Reset (RS) initializes both pointers to location zero and asserts EF low/FF high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256 × 9 bits - provides 256 words of 9-bit storage for byte + parity or packet-framing data paths. |
| Data Access Time | 15 ns - guarantees valid output data within 15 ns after falling edge of read-enable (R), enabling tight timing budgets. |
| Read/Write Frequency | Up to 40 MHz - supports 25 ns cycle times for high-throughput data channeling between mismatched clock domains. |
| Status Flags | EF (empty), FF (full), XO/HF (half-full/expansion-out) - hardware-asserted signals prevent underflow/overflow and enable automatic read/write control. |
| Operating Temperature | 0°C to 70°C - commercial-grade thermal range suitable for industrial embedded and data-acquisition environments. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL logic rails and robust against supply variation. |
| Input Compatibility | TTL-compatible inputs - interfaces directly with legacy 5 V logic families without level-shifting circuitry. |
Pinout & Package
SN74ACT7200L15RJ is housed in a 32-pin plastic J-leaded chip-carrier (RJ) package, optimized for surface-mount reliability and thermal performance in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data input bus | 9-bit parallel input path for writing data into FIFO memory; latched on falling edge of W when FF = high. |
| Q0–Q8 | Data output bus | 9-bit parallel output path for reading data; driven only when R = low and EF = high, otherwise high-impedance. |
| W | Write-enable input | Falling-edge triggered; initiates write cycle if FF = high, stores D0–D8 into next available location. |
| R | Read-enable input | Falling-edge triggered; initiates read cycle if EF = high, shifts next stored word to Q0–Q8. |
| RS | Reset input | Active-low; forces both read and write pointers to location zero and sets EF = low, FF = high, XO/HF = high. |
| FL/RT | First-load/retransmit control | In single-device mode: retransmit enable (pulsed low resets read pointer); in depth expansion: identifies first device (grounded) or subsequent devices (high). |
| XI | Expansion-in input | Grounded disables depth expansion; tied to XO/HF of prior device in daisy chain to enable multi-device depth stacking. |
| XO/HF | Expansion-out/half-full output | In single-device mode: goes low when ≥50% full; in depth expansion: drives XI of next device upon reaching last location. |
| EF | Empty-flag output | Low when read pointer = write pointer - prevents invalid reads and enables automatic read mode when R held low. |
| FF | Full-flag output | Low when write pointer is one location behind read pointer - prevents overflow and enables automatic write mode when W held low. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous read/write operation | Enables independent data flow between mismatched clock domains without synchronization logic or glue circuitry. |
| Retransmit capability | Allows replay of previously read data by resetting read pointer without affecting write pointer - critical for error recovery in comms protocols. |
| Hardware status flag generation | EF, FF, and XO/HF are generated internally from pointer arithmetic - eliminates need for external counter or comparator logic. |
| Bit-width and word-depth expansion | Supports parallel (width) and daisy-chain (depth) configurations up to thousands of words × 18+ bits using only control pins - no external decode logic required. |
| IDT7200-series compatibility | Pin- and function-compatible with IDT7200/7201/7202 FIFOs - simplifies migration and second-sourcing in existing designs. |
Applications
| Data-Acquisition Systems | Communication Protocol Queues |
|---|---|
|
Use Scenario: Buffering output from high-speed analog-to-digital converters sampling at variable rates into a fixed-rate processor bus. IC Role / Device Role / Timing Role: Asynchronous FIFO interface absorbing timing skew between ADC clock domain and host controller domain. Use Value: Prevents data loss during burst sampling by decoupling capture and processing clocks; 9-bit width accommodates 8-bit samples plus parity. |
Use Scenario: Storing incoming packets from UART or SPI peripherals before DMA transfer to memory in embedded networking nodes. IC Role / Device Role / Timing Role: First-in, first-out data staging element isolating peripheral I/O timing from system memory bandwidth constraints. Use Value: Enables deterministic latency and eliminates software polling overhead; EF/FF flags allow interrupt-driven read/write control. |
| Magnetic/Optical Storage Interfaces | Bus Rate Translation Bridges |
|
Use Scenario: Interfacing legacy ISA or VME bus controllers to modern flash or optical memory modules with differing throughput profiles. IC Role / Device Role / Timing Role: Temporary storage buffer synchronizing burst-mode writes from host bus to sequential-access media controller. Use Value: Absorbs write bursts without stalling the host bus; depth expansion supports >256-word buffers for large sector transfers. |
Use Scenario: Connecting a 20 MHz microcontroller bus to a 40 MHz DSP subsystem requiring continuous data streaming. IC Role / Device Role / Timing Role: Dual-clock domain bridge providing elastic storage to match sustained data rates across clock boundaries. Use Value: Eliminates inter-clock-domain metastability risk; 15 ns access time ensures minimal added latency in real-time signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7200LA15J | Same 256 × 9 organization, 15 ns access, 32-pin PLCC package; identical timing and flag behavior but different manufacturer marking and minor AC parameter tolerances. | Drop-in replacement in most designs; requires verification of power-up reset timing due to slight differences in RS deassertion window. | Preferred where IDT-sourced components are mandated or where long-term availability of TI-legacy parts is constrained. |
| SN74ACT7201LA15RJ | 512 × 9 organization (double depth), same RJ package, identical pinout and control logic; 15 ns access, 40 MHz max frequency. | Provides double storage depth without layout change; requires software/firmware update to handle larger address space and updated FF threshold (512 instead of 256). | Select when buffer depth requirements exceed 256 words but board space and pin compatibility must be preserved. |
Compared with IDT7200LA15J, SN74ACT7200L15RJ offers tighter integration with TI logic families and broader distributor stock; compared with SN74ACT7201LA15RJ, it delivers optimal cost/performance for sub-512-word buffering needs without over-provisioning memory.
Availability
SN74ACT7200L15RJ is available at Aetrix Electronics and suitable for data-acquisition systems, communication protocol queues, magnetic/optical storage interfaces, and bus rate translation bridges requiring stable component supply and long-lifecycle support.
Supply support for SN74ACT7200L15RJ 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability interface and memory products.
The SN74ACT7200L15RJ belongs to TI's ACT-family advanced CMOS FIFO series, designed specifically for robust, low-latency data buffering in mixed-clock-domain systems such as test equipment, telecom infrastructure, and industrial control.
FAQ
What is the memory capacity and data width of the SN74ACT7200L15RJ?
The SN74ACT7200L15RJ provides 256 words of storage, each 9 bits wide (256 × 9), supporting byte-wide data plus parity or framing bits. This configuration is fixed per device and confirmed in the functional description and timing tables of the SCAS221A datasheet.
Does the SN74ACT7200L15RJ support simultaneous read and write operations?
Yes, the SN74ACT7200L15RJ supports fully asynchronous read and write operations - they may occur coincidentally or independently. The internal dual-port SRAM and separate address counters ensure no contention, and status flags (EF/FF) prevent invalid accesses during overlap.
What is the purpose of the FL/RT pin on the SN74ACT7200L15RJ?
The FL/RT pin serves dual roles: in single-device mode, it enables retransmit (pulsed low resets read pointer); in depth-expanded configurations, it designates the first device (grounded) or subsequent devices (high). Its function depends on the XI pin state, as defined in the terminal functions table.
Can the SN74ACT7200L15RJ be used in depth-expanded configurations with other FIFOs?
Yes, the SN74ACT7200L15RJ supports depth expansion via XI and XO/HF pins. Up to any number of devices can be daisy-chained; the first device has FL/RT grounded and XI tied to GND, while subsequent devices connect XO/HF to XI and set FL/RT high - verified in Figure 15 and Application Information section.
What package type is used for the SN74ACT7200L15RJ?
The SN74ACT7200L15RJ uses a 32-pin plastic J-leaded chip-carrier (RJ) package, explicitly listed in the "Available in" line of the datasheet header and confirmed in the RJ-package top-view diagram on page 1.
SN74ACT7200L15RJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Size:
- -
- Function:
- -
- Data Rate:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Bus Directional:
- -
- Expansion Type:
- -
- Programmable Flags Support:
- -
- Retransmit Capability:
- -
- FWFT Support:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ACT7200L15RJ FAQ
1.How can I place an order for SN74ACT7200L15RJ through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT7200L15RJ 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 SN74ACT7200L15RJ reliable?
The price and inventory of SN74ACT7200L15RJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT7200L15RJ is usually 5 days.
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Once your SN74ACT7200L15RJ 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 SN74ACT7200L15RJ?
For technical support, including SN74ACT7200L15RJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT7200L15RJ requirements.
6.How does Aetrix verify that SN74ACT7200L15RJ is sourced from the original manufacturer or authorized distributors?
All SN74ACT7200L15RJ 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 SN74ACT7200L15RJ meets industry standards.
7.What is the process for return or replacement of SN74ACT7200L15RJ?
All SN74ACT7200L15RJ units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT7200L15RJ, 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 SN74ACT7200L15RJ part is unused and in its original packaging.
Return procedure for SN74ACT7200L15RJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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