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Texas Instruments SN74V283-15PZA
- Part No.:
- SN74V283-15PZA
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 80-LQFP
- Datasheet:
-
SN74V283-15PZA.pdf
- Description:
- IC FIFO SYNC 64KX9 10NS 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,520
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Product details
Overview
SN74V283-15PZA from Texas Instruments is a 32768 × 18 / 65536 × 9 high-speed synchronous FIFO memory IC with independent 3.3-V read/write clocks, 6-ns cycle time, and user-selectable ×9/×18 bus sizing - deployed in network buffering, DSP interfacing, and video data stream alignment where depth and low-latency retransmit are critical.
For engineers reviewing the SN74V283-15PZA datasheet, SN74V283-15PZA pinout, SN74V283-15PZA application, or SN74V283-15PZA equivalent, key selection considerations include FWFT vs. standard timing mode configuration, programmable almost-empty/full flag offsets, big/little-endian byte ordering, zero-latency retransmit capability, and 5-V-tolerant input compatibility with legacy logic interfaces.
Technical Context
This FIFO implements dual-clock architecture with fully asynchronous RCLK and WCLK domains (0–166 MHz), enabling simultaneous read/write operations without arbitration logic. Its RAM array supports two memory organizations: 32768 × 18 (full-width) or 65536 × 9 (half-width), selected at master reset via IW/OW pins.
Flag logic includes five status outputs (EF/OR, FF/IR, HF, PAE, PAF), with PAE/PAF programmable via serial or parallel loading and configurable for synchronous/asynchronous assertion timing using PFM. Retransmit is initiated by RT on RCLK edge and supports zero-latency mode when RM is low during MRS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 32768 × 18 or 65536 × 9 - selectable bus-matching configuration determines effective buffer capacity and data path width |
| Max Clock Frequency | 166 MHz - enables 6-ns read/write cycle time for high-throughput streaming applications |
| First-Word Latency | Fixed low latency - first word appears at Qn after three RCLK edges in FWFT mode; no REN required for initial access |
| Retransmit Mode | Zero-latency supported - RT assertion places first retransmitted word on Qn same RCLK edge, eliminating pipeline delay |
| Input Voltage Tolerance | 5-V-tolerant inputs - allows direct interface with 5-V control logic without level-shifting circuitry |
| Bus Configuration | ×9/×18 bidirectional port sizing - IW and OW pins set write/read port widths independently at master reset |
| Endianness | Big- or little-endian selectable - BE pin configures MSB/LSB ordering during ×18-to-×9 conversion |
Pinout & Package
SN74V283-15PZA is packaged in an 80-pin Thin Quad Flat Pack (TQFP), PZA variant, with 0.5-mm pitch and exposed thermal pad. Pin functions are validated per TI SCAS669D datasheet Figure 1 and Terminal Functions table (pages 7–8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MRS | Master Reset Input | Asynchronous initialization of read/write pointers, flags, and all configuration registers including FWFT/SI, IW, OW, BE, RM, PFM |
| WCLK, RCLK | Independent Clock Inputs | Enable concurrent write and read operations; each clock domain operates up to 166 MHz with no frequency ratio constraint |
| WEN, REN | Write/Read Enable Controls | Gate data transfer on respective clock edges; ignored when FIFO is full (FF/IR) or empty (EF/OR) |
| OE | Output Enable | Tri-states Q0–Q17 outputs when high - essential for bus sharing and hot-swap isolation |
| RT | Retransmit Trigger | Asserted low on rising RCLK edge to reset read pointer to address 0; zero-latency mode active if RM = low at MRS |
| PAE, PAF | Programmable Status Flags | Assert based on user-defined thresholds loaded via LD + Dn (parallel) or LD + SEN + FWFT/SI (serial); timing mode set by PFM |
| IW, OW | Bus Width Configuration | Set during MRS to define write port (×9 or ×18) and read port (×9 or ×18) independently - enables flexible data path adaptation |
| BE | Endianness Select | Low = big-endian (MSB first in ×18→×9 conversion); high = little-endian (LSB first) - critical for correct word alignment |
Key Features
| Feature | Design Value |
|---|---|
| First-Word Fall-Through (FWFT) | Eliminates need for REN assertion on first read - reduces control overhead and latency in burst-read scenarios |
| Zero-Latency Retransmit | Enables immediate reuse of buffered data without pipeline stall - vital for real-time error recovery and frame retransmission |
| Configurable Flag Timing | PAE/PAF operate synchronously (edge-triggered) or asynchronously (level-sensitive) - selectable via PFM pin at MRS |
| Flexible Bus Matching | Supports ×9↔×9, ×9↔×18, ×18↔×9, ×18↔×18 port sizing - simplifies interface to mismatched DSP, FPGA, or ASIC data buses |
| 5-V-Tolerant Inputs | Accepts 5-V TTL/CMOS logic levels while operating at 3.3-V core - eliminates external level shifters in mixed-voltage systems |
| Partial Reset (PRS) | Resets pointers and output register without altering configuration - preserves FWFT mode, flag offsets, endianness, and retransmit settings |
Applications
| Network Packet Buffering | DSP Data Interface |
|---|---|
Use Scenario: Temporarily storing variable-length Ethernet frames between MAC and PHY layers to absorb jitter and rate mismatches. IC Role / Device Role / Timing Role: Asynchronous FIFO bridging 100-MHz MAC interface and 125-MHz PHY clock domains with independent RCLK/WCLK. Use Value: Prevents packet loss during traffic bursts using 32768-word depth and programmable almost-full flag to trigger upstream flow control. | Use Scenario: Interfacing TI C6x DSP EMIF with external high-bandwidth peripherals requiring deep buffering for video frame capture. IC Role / Device Role / Timing Role: Glueless FIFO providing ×18 write port to DSP EMIF and ×9 read port to image sensor controller. Use Value: Enables seamless 16-bit pixel data transfer using big-endian mode and FWFT timing to minimize read latency in real-time preview. |
| Video Frame Synchronization | Telecom Line Card Buffering |
Use Scenario: Aligning asynchronous HDMI transmitter and receiver clocks in AV switchers to eliminate frame tearing. IC Role / Device Role / Timing Role: Dual-clock FIFO absorbing timing skew between 74.25-MHz pixel clock domains with zero-latency retransmit for repeat-frame insertion. Use Value: Maintains lip-sync integrity using half-full flag for balanced read/write scheduling and PRS for mid-frame buffer reset. | Use Scenario: Buffering TDM voice channels between framer and DSP in multi-port VoIP gateway line cards. IC Role / Device Role / Timing Role: ×9-in/×9-out FIFO synchronized to 8.192-MHz T1/E1 framing clock, with programmable almost-empty flag triggering DMA fetch. Use Value: Guarantees jitter-free channel mapping using fixed 6-ns cycle time and 5-V-tolerant control inputs compatible with legacy framer ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V285L15PF | 32768 × 18 depth, 15 ns cycle time, 3.3-V only, no 5-V-tolerant inputs | Lacks FWFT mode and zero-latency retransmit; requires external logic for first-word access | Choose when lower cost and simpler flag logic suffice, and 5-V interface compatibility is not required |
| ON Semiconductor NB3N502M | Smaller 8192 × 18 depth, 10 ns cycle time, integrated PLL, no programmable flags or bus sizing | Designed for clock multiplication, not data buffering; lacks PAE/PAF, IW/OW, BE configuration | Choose only for clock generation tasks - not a functional substitute for SN74V283-15PZA's deep FIFO functionality |
Compared with IDT72V285L15PF and NB3N502M, SN74V283-15PZA uniquely combines 32768-word depth, 6-ns timing, FWFT operation, zero-latency retransmit, and 5-V-tolerant inputs - making it irreplaceable in high-jitter, mixed-voltage, real-time streaming systems requiring deterministic latency and flexible bus adaptation.
Availability
SN74V283-15PZA is available at Aetrix Electronics and suitable for network packet buffering, DSP interfacing, video frame synchronization, and telecom line card buffering requiring stable component supply across long-lifecycle industrial and communications programs.
Supply support for SN74V283-15PZA 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 leadership in high-speed interface and memory products.
The SN74V283-15PZA belongs to TI's high-speed FIFO family designed specifically for jitter absorption, clock domain crossing, and bus-matching in demanding communications, video, and DSP infrastructure applications.
FAQ
What memory organization does SN74V283-15PZA support?
SN74V283-15PZA supports two memory configurations: 32768 × 18 (full 18-bit width) or 65536 × 9 (half-width), selected at master reset using IW and OW pins. This dual-mode architecture enables flexible data path adaptation without redesigning PCB layout or firmware - the same SN74V283-15PZA device can serve both wide-bus DSP interfaces and narrow-bus sensor links depending on system requirements.
How does SN74V283-15PZA achieve zero-latency retransmit?
SN74V283-15PZA achieves zero-latency retransmit when RM is held low during master reset (MRS). In this mode, asserting RT low on a rising RCLK edge causes the first retransmitted word to appear on Q0–Q17 outputs on that same RCLK edge - no additional clock cycles are needed. This behavior is confirmed in TI SCAS669D Figures 13–14 and eliminates pipeline delay in real-time error recovery or frame-repeat applications.
Can SN74V283-15PZA interface directly with 5-V logic?
Yes, SN74V283-15PZA features 5-V-tolerant inputs - all control and data input pins (WEN, REN, MRS, IW, OW, BE, etc.) accept 0–5.5-V signals while operating from a 3.3-V VCC supply. This eliminates external level shifters when interfacing with legacy 5-V microcontrollers, FPGAs, or peripheral ICs, reducing BOM cost and board space - a verified specification in the Absolute Maximum Ratings and Electrical Characteristics sections of the SCAS669D datasheet.
What is the difference between master reset (MRS) and partial reset (PRS) on SN74V283-15PZA?
Master reset (MRS) initializes all internal state: read/write pointers, output register, flags (EF/OR, FF/IR, HF, PAE, PAF), and configuration registers (FWFT/SI, IW, OW, BE, RM, PFM, IP). PRS resets only pointers and output register while preserving all configuration and flag offset values. PRS is used mid-operation to clear data without losing programmed settings - a behavior explicitly defined in the "Partial Reset (PRS)" section of TI SCAS669D page 9.
Does SN74V283-15PZA support both big-endian and little-endian data formats?
Yes, SN74V283-15PZA supports both big-endian and little-endian byte ordering via the BE pin during master reset. When BE = low, MSB of a ×18 word is read first in ×9 mode; when BE = high, LSB is read first. This feature is essential for correct data alignment when converting between 18-bit DSP words and 9-bit transport streams - confirmed in the "Big Endian/Little Endian (BE)" terminal description on page 7 of SCAS669D.
SN74V283-15PZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74V
- Package/Case:
- 80-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Size:
- 576K (32K x 18)(64K x 9)
- Function:
- Synchronous
- Data Rate:
- 66.7MHz
- Access Time:
- 10ns
- Voltage - Supply:
- 3.15 V ~ 3.45 V
- Current - Supply (Max):
- 35mA
- Bus Directional:
- Uni-Directional
- Expansion Type:
- Depth, Width
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- Yes
- FWFT Support:
- Yes
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-LQFP (14x14)
SN74V283-15PZA FAQ
1.How can I place an order for SN74V283-15PZA through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74V283-15PZA 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 SN74V283-15PZA reliable?
The price and inventory of SN74V283-15PZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74V283-15PZA is usually 5 days.
3.What payment methods are accepted for SN74V283-15PZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74V283-15PZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74V283-15PZA?
SN74V283-15PZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74V283-15PZA 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 SN74V283-15PZA?
For technical support, including SN74V283-15PZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74V283-15PZA requirements.
6.How does Aetrix verify that SN74V283-15PZA is sourced from the original manufacturer or authorized distributors?
All SN74V283-15PZA 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 SN74V283-15PZA meets industry standards.
7.What is the process for return or replacement of SN74V283-15PZA?
All SN74V283-15PZA units undergo pre-shipment inspection (PSI). If there is an issue with SN74V283-15PZA, 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 SN74V283-15PZA part is unused and in its original packaging.
Return procedure for SN74V283-15PZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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