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Texas Instruments SN74V215-7PAG
- Part No.:
- SN74V215-7PAG
- Manufacturer:
- Texas Instruments
- Category:
- FIFOs Memory
- Package:
- 64-TQFP
- Datasheet:
-
SN74V215-7PAG.pdf
- Description:
- IC FIFO SYNC 512X18 5NS 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
SN74V215-7PAG from Texas Instruments is a 512 × 18-bit synchronous FIFO memory IC with 7.5-ns read/write cycle time, 3.3-V VCC, and 5-V input tolerance. It supports FWFT or standard timing modes, features programmable almost-empty/full flags, and delivers high-speed buffering for DSP-to-processor and DSP-to-AFE data paths in telecom and video systems.
For engineers reviewing the SN74V215-7PAG datasheet, SN74V215-7PAG pinout, SN74V215-7PAG application, or SN74V215-7PAG equivalent, key selection criteria include its 512-word depth, dual-clock asynchronous/synchronous operation, 64-pin TQFP package, FWFT mode latency advantage, and TI's DSP-Sync™ interface compatibility with TMS320™ platforms.
Technical Context
This is a synchronous, clocked FIFO with independent read and write ports, each gated on low-to-high clock transitions. It implements two fixed status flags (EF/OR and FF/IR) and two user-programmable flags (PAE and PAF), with offset loading controlled via LD/WEN/RCLK/WCLK sequencing.
Operation supports both first-word fall-through (FWFT) and standard modes, selected at reset via FL/RXI/WXI logic. In FWFT mode, the first word appears at outputs after three RCLK edges without REN assertion; in standard mode, all reads require explicit REN activation and RCLK edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 512 × 18 bits - provides 9,216-bit buffer capacity for burst-mode data alignment between mismatched clock domains. |
| Read/Write Cycle Time | 7.5 ns - enables up to 133 MHz clock operation, supporting real-time DSP interface timing budgets. |
| VCC Supply | 3.3 V ± 0.3 V - compatible with modern low-voltage logic while maintaining 5-V tolerant inputs for legacy bus interfacing. |
| Timing Modes | FWFT or Standard - FWFT reduces initial read latency by eliminating REN dependency for first word; standard mode requires explicit read enable. |
| Flag Types | Fixed EF/OR & FF/IR + programmable PAE/PAF + HF - allows precise flow control at configurable occupancy thresholds (e.g., default PAE = 63 words from empty). |
| Expansion Support | Daisy-chain depth expansion via XI/XO pins - enables seamless stacking of multiple SN74V215-7PAG devices without external glue logic. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems including communications infrastructure and industrial controllers. |
Pinout & Package
Packaged in a 64-pin thin quad flat package (TQFP), lead-free and RoHS-compliant, with 0.5-mm pitch and exposed thermal pad (PAG suffix per TI packaging nomenclature).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D17 | Data input bus | 18-bit parallel input path synchronized to WCLK; accepts 5-V-tolerant signals for mixed-voltage system integration. |
| Q0–Q17 | Data output bus | 18-bit tristatable output register updated on RCLK edge; OE controls high-impedance state for bus sharing. |
| WCLK / RCLK | Independent port clocks | Asynchronous or coincident clock inputs-no phase relationship required between write and read domains. |
| WEN / REN | Port enable controls | Active-low gating signals; inhibit write/read when asserted high, preserving FIFO state during idle cycles. |
| EF/OR / FF/IR | Dual-function status flags | EF (standard) or OR (FWFT) indicates data availability; FF (standard) or IR (FWFT) signals write readiness-synchronous to respective clock edges. |
| PAE / PAF | Programmable threshold flags | Assert low when FIFO occupancy reaches user-defined offsets (default: 63 from empty/full); configurable via LD/WEN sequence. |
| FL / RXI / WXI | Mode configuration inputs | Set timing mode (FWFT/standard) and flag synchronization (sync/async) at power-on reset per truth table in datasheet. |
| RS | Asynchronous reset | Clears internal pointers, initializes flags (FF/PAF = high; EF/PAE = low), and zeroes output register-required before first write. |
| LD | Offset register load control | Enables programming of PAE/PAF offsets using D0–D11; requires coordinated WEN/RCLK/WCLK edges per register-write sequence. |
| OE | Output enable | Active-low control of Q0–Q17 bus drivers; essential for shared-data-bus architectures and hot-swap isolation. |
| HGND/VCC | Power distribution | Multiple GND (pins 30,35,40,46,51,55,62) and VCC (22,33,43,49,56) pins minimize noise and ensure stable core voltage under high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| FWFT Timing Mode | Eliminates REN requirement for first-word access-reduces read latency by up to one RCLK cycle in streaming applications like video frame buffering. |
| Programmable Almost-Empty/Full Flags | Configurable occupancy thresholds (e.g., PAE = 63 words from empty) enable adaptive flow control without firmware polling overhead. |
| DSP-Glueless Interface | Native timing and signal mapping for TI TMS320™ DSPs-no external logic needed for handshake, clock domain crossing, or flag decoding. |
| Depth Expansion via Daisy Chain | Supports cascaded FIFO stacks using XI/XO pins-enables scalable buffer depth (e.g., 2× SN74V215-7PAG = 1024 × 18) with single-controller simplicity. |
| 5-V Input Tolerance on 3.3-V Core | Accepts legacy 5-V logic levels on all inputs-simplifies migration from older 5-V systems while reducing BOM count and power consumption. |
Applications
| Telecom Line Card Buffering | DSP-Based Motor Control Loop |
|---|---|
Use Scenario: Real-time packet buffering between framer ASIC and DSP in DSLAM line cards handling multiple ADSL2+ channels. IC Role / Device Role / Timing Role: Synchronous FIFO decouples framer's 125-MHz parallel bus from DSP's variable-latency instruction execution, absorbing jitter and burst traffic. Use Value: 7.5-ns cycle time ensures sub-8-ns latency per word; FWFT mode guarantees immediate data availability upon channel activation, minimizing startup delay. | Use Scenario: Isolating ADC sample stream from PWM update timing in servo drive firmware running on C2000™ microcontroller. IC Role / Device Role / Timing Role: SN74V215-7PAG acts as deterministic latency buffer between analog front-end sampling clock and digital control loop execution clock. Use Value: Programmable PAE/PAF flags trigger DMA requests at precise fill levels-enabling zero-wait-state data transfer and eliminating CPU polling overhead. |
| Video Frame Preprocessing Pipeline | Industrial Ethernet Gateway Buffer |
Use Scenario: Holding YUV422 pixel data between image sensor interface and TI DaVinci™ processor for real-time deinterlacing and scaling. IC Role / Device Role / Timing Role: Dual-clock FIFO absorbs clock skew between 74.25-MHz HDMI receiver and 297-MHz video processing engine. Use Value: 512 × 18-bit depth accommodates one full HD line (1920 pixels × 2 bytes); half-full flag (HF) enables backpressure signaling to upstream serializer. | Use Scenario: Aggregating Modbus TCP packets from multiple field devices before forwarding to PLC over PROFINET. IC Role / Device Role / Timing Role: SN74V215-7PAG buffers incoming Ethernet frames prior to protocol stack parsing, isolating PHY layer jitter from application-layer timing. Use Value: Asynchronous read/write clocks allow independent optimization of MAC-layer receive timing and software-driven transmit scheduling-improving determinism in hard real-time networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V215L10PFI | 512 × 18-bit, 10-ns cycle time, 3.3-V only (no 5-V tolerance), different pinout and flag naming (e.g., EF/FF vs OR/IR) | Lacks FWFT mode and DSP-Sync™ interface optimizations; requires external level shifters for 5-V buses | Prefer SN74V215-7PAG when interfacing with legacy 5-V logic or TI TMS320™ DSPs; IDT72V215L10PFI suits pure 3.3-V systems with tighter board space constraints. |
| ON Semiconductor NB3N502M | 256 × 18-bit depth, 3.3-V supply, no programmable flags or FWFT mode, integrated PLL for clock synthesis | Targeted at clock-domain bridging rather than data buffering; insufficient depth for multi-line telecom or HD video use cases | Select SN74V215-7PAG for applications requiring ≥512-word depth, programmable flow control, or TI DSP glueless support; NB3N502M fits simpler clock-sync-only roles. |
Compared with IDT72V215L10PFI and NB3N502M, SN74V215-7PAG uniquely combines 5-V input tolerance, FWFT latency reduction, and TI-specific DSP interface logic-making it optimal for legacy-compatible, high-throughput embedded signal processing where deterministic first-word response is critical.
Availability
SN74V215-7PAG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motor control, video preprocessing, and industrial Ethernet gateway designs requiring stable component supply across extended production lifecycles.
Supply support for SN74V215-7PAG 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 focused on analog, embedded processing, and connectivity technologies, serving automotive, industrial, personal electronics, and enterprise markets.
SN74V215-7PAG belongs to TI's DSP-Sync™ family of high-speed FIFOs, engineered specifically to eliminate glue logic between TMS320™ DSPs and peripheral interfaces-optimizing throughput, latency, and PCB layout efficiency in real-time signal processing systems.
FAQ
What is the maximum operating frequency supported by SN74V215-7PAG?
SN74V215-7PAG supports clock frequencies up to 133 MHz, derived from its 7.5-ns read/write cycle time specification. This enables reliable operation in high-speed DSP interfaces and real-time data acquisition systems where sub-8-ns timing margins are required. The device maintains this performance across its full 0°C to +70°C commercial temperature range.
Does SN74V215-7PAG support both synchronous and asynchronous read/write clock domains?
Yes, SN74V215-7PAG supports fully asynchronous read and write clocks-RCLK and WCLK may run at different frequencies and phases with no synchronization requirement. It also supports coincident (phase-aligned) clock operation. This flexibility simplifies integration between disparate clock domains such as ADC sampling clocks and processor bus clocks.
How does the first-word fall-through (FWFT) mode function in SN74V215-7PAG?
In FWFT mode, the first word written to an empty SN74V215-7PAG appears on Q0–Q17 outputs after three valid RCLK rising edges-without requiring REN assertion. Subsequent words still require REN activation. This reduces initial read latency by one clock cycle, which is critical in streaming applications like video frame buffering or real-time packet processing.
What are the default offset values for the programmable almost-empty and almost-full flags in SN74V215-7PAG?
SN74V215-7PAG defaults to PAE = 63 words from empty and PAF = 63 words from full at power-on reset. These offsets are stored in dedicated 12-bit registers and can be reprogrammed via the LD/WEN/RCLK/WCLK sequence using D0–D11 inputs. The SN74V225/235/245 variants default to 127-word offsets.
Can SN74V215-7PAG be used in depth-expansion configurations, and how is it implemented?
Yes, SN74V215-7PAG supports daisy-chain depth expansion using XI (pin 21) and XO (pin 26) pins. In a chain, FL is grounded on the first device and pulled high on subsequent devices. RXO and WXO propagate read/write completion pulses between devices, enabling seamless stacking-e.g., two SN74V215-7PAG units yield 1024 × 18-bit capacity without external logic.
SN74V215-7PAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74V
- Package/Case:
- 64-TQFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 9K (512 x 18)
- Function:
- Synchronous
- Data Rate:
- 133MHz
- Access Time:
- 5ns
- Voltage - Supply:
- 3 V ~ 3.6 V
- Current - Supply (Max):
- 35mA
- Bus Directional:
- Uni-Directional
- Expansion Type:
- Depth, Width
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- No
- FWFT Support:
- Yes
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (10x10)
SN74V215-7PAG FAQ
1.How can I place an order for SN74V215-7PAG through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74V215-7PAG 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 SN74V215-7PAG reliable?
The price and inventory of SN74V215-7PAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74V215-7PAG is usually 5 days.
3.What payment methods are accepted for SN74V215-7PAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74V215-7PAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74V215-7PAG?
SN74V215-7PAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74V215-7PAG 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 SN74V215-7PAG?
For technical support, including SN74V215-7PAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74V215-7PAG requirements.
6.How does Aetrix verify that SN74V215-7PAG is sourced from the original manufacturer or authorized distributors?
All SN74V215-7PAG 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 SN74V215-7PAG meets industry standards.
7.What is the process for return or replacement of SN74V215-7PAG?
All SN74V215-7PAG units undergo pre-shipment inspection (PSI). If there is an issue with SN74V215-7PAG, 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 SN74V215-7PAG part is unused and in its original packaging.
Return procedure for SN74V215-7PAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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