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Texas Instruments SN74ACT7203L15NP
- Part No.:
- SN74ACT7203L15NP
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 28-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ACT7203L15NP.pdf
- Description:
- IC FIFO ASYNC 2KX9 15NS 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
SN74ACT7203L15NP from Texas Instruments is a 2048 × 9 asynchronous dual-port FIFO memory IC with independent read/write operations, 15 ns access time, 40 MHz max clock frequency, and TTL-compatible inputs - used as a rate-matching buffer between asynchronous buses in data-acquisition systems.
For engineers reviewing the SN74ACT7203L15NP datasheet, SN74ACT7203L15NP pinout, SN74ACT7203L15NP application, or SN74ACT7203L15NP equivalent, key selection criteria include empty/full flag timing, retransmit capability, depth-expansion logic compatibility with IDT7203/7204, and 28-pin plastic DIP (NP) package integration into legacy industrial control and communications hardware.
Technical Context
This device implements a first-in, first-out (FIFO) architecture using dual-port SRAM with independent internal write and read address counters. It supports both asynchronous and coincident read/write cycles, with status flags (EF, FF, XO/HF) generated by pointer comparison logic.
Retransmit functionality resets the read pointer without affecting the write pointer, enabled via FL/RT input; depth expansion uses XI/XO daisy-chaining with external OR logic for composite EF/FF, while width expansion connects parallel devices with shared control lines and grounded XI inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2048 × 9 bits - provides 2048 words of 9-bit storage for byte + parity or packet-framing data paths. |
| Data Access Time | 15 ns - enables high-speed interfacing with 40 MHz bus clocks without wait states. |
| Read/Write Cycle Time | 25 ns - defines minimum interval between successive read or write pulses for reliable operation. |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL logic rails and ensures noise margin compliance. |
| Operating Temperature | 0°C to 70°C - rated for commercial-grade industrial embedded applications, not extended or automotive ranges. |
| Input Compatibility | TTL-compatible inputs - allows direct connection to 5 V CMOS/TTL logic without level-shifting circuitry. |
| Status Flags | EF (empty), FF (full), XO/HF (half-full or expansion-out) - provide real-time buffer occupancy feedback for flow control. |
Pinout & Package
The SN74ACT7203L15NP is housed in a 28-pin plastic DIP (NP) package, suitable for through-hole prototyping and legacy PCB assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | VCC / GND | Power supply (5 V) and ground reference - decoupling capacitors required near pins for stable operation. |
| 2–9, 22–27 | D0–D8 / Q0–Q8 | 9-bit bidirectional data path - D inputs load data on W↓; Q outputs drive data on R↓ with 3-state control. |
| 10, 11, 12, 16, 17, 18, 19, 13, 9 | Q0–Q8 | Data outputs - high-impedance when R = high or FIFO is empty; valid after ten(R-QX) (5 ns). |
| 14, 20, 21, 23, 15 | W / R / RS / FL/RT / XI | Control inputs - W enables write on falling edge; R enables read; RS resets pointers; FL/RT selects retransmit or first-load mode. |
| 24, 25, 26 | FF / EF / XO/HF | Status flag outputs - FF low = full; EF low = empty; XO/HF functions as half-full flag or expansion-out signal depending on XI state. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Read/Write | Independent R and W controls allow non-overlapping or coincident operations - eliminates synchronization logic in cross-clock-domain interfaces. |
| Retransmit Capability | FL/RT pulse resets read pointer to location zero without altering write pointer - enables data replay for error recovery or protocol retransmission. |
| Depth Expansion Logic | Integrated XI/XO daisy-chain interface supports multi-device FIFOs up to 49,152 words - reduces external glue logic versus discrete counter+RAM solutions. |
| Empty/Full/Half-Full Flags | Hardware-generated EF, FF, and XO/HF signals provide cycle-accurate buffer status - enables deterministic flow control without software polling overhead. |
| IDT7203/7204 Compatibility | Fully pin- and function-compatible with IDT's 7203/7204 family - allows drop-in replacement in existing designs using those FIFOs. |
Applications
| Data Acquisition Systems | Communication Protocol Buffers |
|---|---|
Use Scenario: Buffering output from 10–20 MSPS analog-to-digital converters feeding a slower microcontroller or DSP. IC Role / Device Role / Timing Role: Rate-matching FIFO between ADC's high-speed parallel bus and processor's lower-bandwidth memory-mapped interface. Use Value: Prevents data loss during burst sampling by absorbing timing mismatches; 15 ns access ensures minimal latency in real-time capture. | Use Scenario: Storing packets from UART or HDLC controllers before transmission over a serial link or network interface. IC Role / Device Role / Timing Role: First-in, first-out queue managing variable-length frame ingress/egress across clock domains. Use Value: Eliminates need for software-managed circular buffers; EF/FF flags enable hardware handshaking with DMA controllers. |
| Magnetic/Optical Storage Interfaces | Industrial Control Backplanes |
Use Scenario: Interfacing between disk controller ASICs and host bus adapters operating at different speeds. IC Role / Device Role / Timing Role: Temporary storage element synchronizing burst-mode read/write transfers between storage media and system memory. Use Value: Supports 40 MHz write bursts while allowing 10–25 MHz host reads - maintains throughput without stalling either side. | Use Scenario: Isolating PLC I/O modules from main CPU bus in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Asynchronous bridge buffering sensor input streams and actuator command queues across isolated clock domains. Use Value: Enables deterministic response timing; retransmit function supports retry-on-failure in safety-critical motion control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7203L15 | Same 2048 × 9 organization, 15 ns access, 28-pin DIP; identical pinout and timing but manufactured by Integrated Device Technology. | No functional difference - fully interchangeable in all documented use cases including depth expansion and retransmit mode. | Select IDT7203L15 when sourcing from IDT-authorized channels or when matching existing IDT-based BOMs. |
| SN74ACT7203L15DV | Same die and electrical specs, but in 28-pin SOIC (DV) package - 30% smaller footprint, surface-mount only. | Requires PCB redesign for SMT assembly; unsuitable for through-hole prototyping or legacy DIP sockets. | Choose SN74ACT7203L15DV for space-constrained production boards where automated assembly is available. |
Compared with IDT7203L15 and SN74ACT7203L15DV, the SN74ACT7203L15NP offers identical FIFO functionality and timing in a through-hole DIP package - making it optimal for lab validation, repair, and legacy industrial systems where socketed 5 V logic remains standard.
Availability
SN74ACT7203L15NP is available at Aetrix Electronics and suitable for data-acquisition systems, communication protocol buffers, magnetic/optical storage interfaces, and industrial control backplanes requiring stable component supply and long-term obsolescence management.
Supply support for SN74ACT7203L15NP 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic products for industrial, automotive, and communications markets.
The SN74ACT7203L15NP belongs to TI's ACT-family advanced CMOS logic line, designed specifically for high-speed, low-power FIFO buffering in asynchronous digital systems requiring robust timing margins and legacy 5 V compatibility.
FAQ
What is the memory depth and width of the SN74ACT7203L15NP?
The SN74ACT7203L15NP provides 2048 words of storage, each word being 9 bits wide (2048 × 9). This configuration supports byte-wide data plus parity or framing bits, and is explicitly defined in the device's functional description and organization table within the SCAS226A datasheet.
Does the SN74ACT7203L15NP support retransmit functionality, and how is it activated?
Yes, the SN74ACT7203L15NP supports retransmit: pulsing FL/RT low while holding R and W high resets the internal read pointer to location zero without altering the write pointer. This allows previously read data to be replayed - confirmed in the RESET AND RETRANSMIT FUNCTION TABLE and timing diagram Figure 4.
What package type does the SN74ACT7203L15NP use, and is it socket-compatible?
The SN74ACT7203L15NP uses a 28-pin plastic DIP (NP) package with 0.600-inch width, standard dual-in-line pin spacing, and through-hole leads - fully compatible with industry-standard 28-pin DIP sockets used in test fixtures, development boards, and legacy industrial controllers.
Can multiple SN74ACT7203L15NP devices be cascaded for greater depth, and what external logic is needed?
Yes - depth expansion is supported via XI/XO daisy-chaining. The first device has FL/RT grounded; others have FL/RT high. XO drives XI of the next device. External OR gates are required to combine EF and FF outputs across all devices; RT and HF functions are disabled in depth-expanded mode per the application note.
Is the SN74ACT7203L15NP compatible with IDT7203-series FIFOs, and in what ways?
Yes, the SN74ACT7203L15NP is fully compatible with IDT7203/7204 devices: identical pinout, timing parameters (15 ns access, 25 ns cycle), functional behavior (EF/FF flags, retransmit, expansion logic), and electrical specifications - explicitly stated in the device description and confirmed across logic symbols and timing tables in SCAS226A.
SN74ACT7203L15NP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Size:
- 18K (2K x 9)
- Function:
- Asynchronous
- Data Rate:
- 40MHz
- Access Time:
- 15ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 120mA
- 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:
- Through Hole
- Supplier Device Package:
- 28-DIP
SN74ACT7203L15NP FAQ
1.How can I place an order for SN74ACT7203L15NP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT7203L15NP 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 SN74ACT7203L15NP reliable?
The price and inventory of SN74ACT7203L15NP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT7203L15NP is usually 5 days.
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4.How is shipping managed for SN74ACT7203L15NP?
SN74ACT7203L15NP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT7203L15NP 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 SN74ACT7203L15NP?
For technical support, including SN74ACT7203L15NP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT7203L15NP requirements.
6.How does Aetrix verify that SN74ACT7203L15NP is sourced from the original manufacturer or authorized distributors?
All SN74ACT7203L15NP 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 SN74ACT7203L15NP meets industry standards.
7.What is the process for return or replacement of SN74ACT7203L15NP?
All SN74ACT7203L15NP units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT7203L15NP, 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 SN74ACT7203L15NP part is unused and in its original packaging.
Return procedure for SN74ACT7203L15NP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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7201LA15JGI
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