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Renesas 72215LB10PFG8
- Part No.:
- 72215LB10PFG8
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 64-LQFP
- Datasheet:
-
72215LB10PFG8.pdf
- Description:
- IC FIFO SYNC 512X18 6.5NS 64QFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT72215LB10PFG8 from Integrated Device Technology is a 512 × 18-bit synchronous FIFO memory IC with dual-clock operation, 10 ns read/write cycle time, and industrial temperature support (–40°C to +85°C). It features programmable Almost-Empty/Almost-Full flags, Half-Full flag, and depth/width expandability-used in LAN controllers, optical disk interfaces, and interprocessor data buffering where deterministic latency and clock domain bridging are required.
For engineers reviewing the IDT72215LB10PFG8 datasheet, IDT72215LB10PFG8 pinout, IDT72215LB10PFG8 application, or IDT72215LB10PFG8 equivalent, this page delivers verified timing parameters, flag behavior under dual-clock skew, offset register programming sequence, TQFP-64 package mapping, and real-world expansion configuration guidance for multi-device FIFO stacks.
Technical Context
This device implements a dual-port zero fall-through time architecture with independent read/write pointer logic, enabling concurrent asynchronous read and write operations without metastability risk when tSKEW1 ≥ 5 ns and tSKEW2 ≥ 5 ns. Its submicron CMOS process ensures low ICC1 (≤60 mA active) and fast access (tA = 6.5 ns) at 5 V supply.
The FIFO supports three operational modes: single-device (FL/WXI/RXI grounded), width expansion (parallel data bus widening), and daisy-chain depth expansion using WXO/RXO signaling. Programmable flags (PAE/PAF) are loaded via LD-controlled state machine with D0–D11 inputs and Q0–Q11 outputs, defaulting to 63-word offsets for IDT72215LB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 512 × 18-bit - provides 9,216 bits of buffered storage for burst-mode data alignment between mismatched clock domains. |
| Cycle Time (tCLK) | 10 ns - enables 100 MHz maximum clock frequency for high-throughput data streaming in real-time systems. |
| Access Time (tA) | 6.5 ns - guarantees output data validity within 6.5 ns after RCLK rising edge, critical for tight timing closure in FPGA-ASIC interfaces. |
| Operating Voltage | 4.5 V to 5.5 V - compatible with legacy 5 V TTL/CMOS logic families and tolerant of power rail variation in industrial environments. |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade deployment in base stations, motor drives, and factory automation equipment. |
| Flag Synchronization | EF synchronized to RCLK; FF synchronized to WCLK; PAE/PAF/HF asynchronous - enables precise status sampling aligned to respective clock domains. |
| Power Consumption | ICC1 ≤ 60 mA (active), ICC2 ≤ 5 mA (standby) - supports low-power system states while maintaining fast wake-up response. |
Pinout & Package
Package: 64-lead thin quad flatpack (TQFP), lead finish SnPb (end-of-life as of June 15, 2018), body size 10 mm × 10 mm, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D17 | Data Input Bus | 18-bit parallel input path; latched on WCLK rising edge when WEN = LOW; must meet tDS = 3 ns setup before clock edge. |
| Q0–Q17 | Data Output Bus | 18-bit parallel output path; driven only when OE = LOW; tri-stated when OE = HIGH to prevent bus contention. |
| WCLK / RCLK | Independent Clock Inputs | Asynchronous clocks; WCLK controls write pointer advancement; RCLK controls read pointer and EF flag update; minimum skew tSKEW1/tSKEW2 = 5 ns required for reliable flag transitions. |
| WEN / REN / OE | Control Enables | WEN gates write cycles; REN gates read cycles; OE enables/disables output drivers - all active-LOW with TTL-compatible thresholds (VIH = 2.0 V, VIL = 0.8 V). |
| RS | Hardware Reset | Active-LOW global reset; initializes pointers to address 0, sets FF/PAF = HIGH, EF/PAE = LOW, and clears output register to zeros after tRSF = 15 ns. |
| LD | Offset Register Load | Active-LOW control for programming PAE/PAF offsets; toggling LD with WEN/REN LOW sequences writes/reads D0–D11 to/from internal 12-bit offset registers. |
| FF / EF / PAF / PAE / HF | Status Flags | Open-drain compatible outputs; FF/EF are synchronous (WCLK/RCLK); PAF/PAE/HF are asynchronous - used for interrupt generation or flow control handshake. |
| WXI / RXI / WXO / RXO / FL | Expansion Interface | Supports daisy-chain depth expansion: FL = LOW on first device; WXI/RXI grounded in single-device mode; WXO/RXO generate pulses on last-word write/read for cascaded FIFO chaining. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Clock Architecture | Enables seamless bridging between independent clock domains (e.g., CPU ↔ peripheral bus) without external synchronization logic or FIFO full/empty metastability risk. |
| Programmable Almost-Empty/Full Flags | Default 63-word offsets allow early warning of buffer depletion/filling - configurable via LD-controlled offset registers to match system-level burst length and latency budgets. |
| Half-Full Flag (HF) | Provides symmetric midpoint status for balanced read/write scheduling in ping-pong or round-robin buffer management schemes without software polling overhead. |
| Depth Expandability | Daisy-chain capability via WXO/RXO pins allows stacking multiple IDT72215LB10PFG8 devices to achieve 1,024×18, 1,536×18, etc., with no external glue logic required. |
| Zero Fall-Through Time | Eliminates delay between write and subsequent read of same location - essential for low-latency loopback testing, echo cancellation, and real-time signal processing pipelines. |
Applications
| LAN Controller Buffering | Optical Disk Interface |
|---|---|
|
Use Scenario: Buffering packetized Ethernet frames between MAC layer and PHY transceiver operating at different clock rates. IC Role / Device Role / Timing Role: Synchronous FIFO acting as elastic buffer to absorb clock domain skew and jitter between 25 MHz MII interface and 125 MHz GMII domain. Use Value: Prevents frame loss during traffic bursts by providing 512-word depth with deterministic 10 ns cycle time and hardware-full/empty signaling for DMA arbitration. |
Use Scenario: Interfacing CD/DVD controller ASIC to servo motor driver IC with mismatched timing requirements. IC Role / Device Role / Timing Role: Data staging buffer isolating high-speed burst reads from disc (48 MHz) from slower servo update loop (8 MHz). Use Value: Enables continuous data streaming without stalling the optical pickup head; HF flag triggers servo repositioning before buffer underflow occurs. |
| Interprocessor Communication | Industrial PLC I/O Module |
|
Use Scenario: Exchanging sensor fusion data between ARM Cortex-M7 master and DSP co-processor in robotics control system. IC Role / Device Role / Timing Role: Dual-clock FIFO decoupling 200 MHz DSP core clock from 100 MHz MCU bus clock while preserving data ordering. Use Value: Guarantees atomic word transfer with no bit corruption; PAF/PAE flags enable adaptive flow control to prevent overflow during transient computational load spikes. |
Use Scenario: Isolating fieldbus communication (PROFINET RT at 100 Mbps) from local analog I/O acquisition (10 kHz sampling) in modular PLC backplane. IC Role / Device Role / Timing Role: Clock-domain crossing buffer synchronizing cyclic process data exchange between real-time Ethernet stack and deterministic ADC sequencer. Use Value: Meets IEC 61131-3 cycle time constraints (<1 ms) using hardware flags instead of software polling - reducing CPU load by >12% in benchmark tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous FIFO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 72215L10TF8 | Same die, STQFP-64 package (0.5 mm pitch, thinner profile than TQFP); identical AC/DC specs and pinout. | Preferred for space-constrained designs requiring lower Z-height; thermal resistance differs slightly (θJA = 42°C/W vs. 48°C/W for PFG8). | Select 72215L10TF8 when board stack height is limited and thermal margin permits minor derating. |
| 72215LB15PFG8 | Slower 15 ns cycle time (66.7 MHz max), otherwise identical functionality, pinout, and feature set. | Suitable for cost-sensitive applications where 100 MHz throughput is unnecessary; lower ICC1 (typ. 42 mA vs. 60 mA) reduces power dissipation. | Choose 72215LB15PFG8 if system clock rate ≤ 66.7 MHz and thermal/power budget is tighter than performance requirement. |
Compared with 72215L10TF8 and 72215LB15PFG8, IDT72215LB10PFG8 delivers highest throughput (100 MHz) in standard TQFP-64, making it optimal for latency-critical industrial comms where PCB layout favors conventional TQFP footprint and thermal design accommodates higher active current.
Availability
IDT72215LB10PFG8 is available at Aetrix Electronics and suitable for LAN controllers, optical disk interfaces, and interprocessor communication systems requiring stable component supply across extended industrial lifecycles.
Supply support for IDT72215LB10PFG8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance data conversion solutions.
IDT72215LB10PFG8 belongs to the SyncFIFO™ family designed specifically for deterministic, low-latency data buffering across asynchronous clock domains in industrial, telecom, and storage subsystems.
FAQ
What is the maximum clock frequency supported by IDT72215LB10PFG8?
IDT72215LB10PFG8 supports a maximum clock frequency of 100 MHz, derived from its 10 ns read/write cycle time (tCLK). This applies to both WCLK and RCLK independently, provided tSKEW1 ≥ 5 ns and tSKEW2 ≥ 5 ns for reliable flag updates in dual-clock mode. The device maintains full functionality across the industrial temperature range (–40°C to +85°C) at this speed.
How does the Half-Full flag (HF) behave in IDT72215LB10PFG8?
In IDT72215LB10PFG8, the HF flag goes LOW when exactly 256 words (half of 512 depth) are stored, and remains LOW until the difference between write and read pointers drops to ≤256. It resets HIGH on the next RCLK rising edge after underflow. HF is asynchronous and shares the WXO pin - in single-device mode, it functions solely as HF; in daisy-chain mode, WXO carries expansion pulses instead.
Can IDT72215LB10PFG8 be used in single-clock mode?
Yes, IDT72215LB10PFG8 supports single-clock operation by tying WCLK and RCLK together. In this configuration, the device behaves as a standard synchronous FIFO with shared timing - all flags (EF, FF, PAF, PAE, HF) remain functional, and tSKEW constraints are irrelevant. Write and read operations are still controlled independently by WEN and REN, preserving full buffering capability.
What are the default offset values for PAE and PAF in IDT72215LB10PFG8?
IDT72215LB10PFG8 defaults to 63-word offsets for both PAE and PAF after reset - meaning PAE asserts LOW when 63 words remain before empty, and PAF asserts LOW when 63 words remain before full. These values are stored in the internal 12-bit offset registers and can be reprogrammed via LD/WEN sequence using D0–D11 inputs.
Is IDT72215LB10PFG8 RoHS-compliant?
IDT72215LB10PFG8 uses SnPb lead finish and was documented as EOL with last-time-buy expiring June 15, 2018. It is not RoHS-compliant due to lead content. For RoHS alternatives, consult Renesas' post-acquisition SyncFIFO portfolio (e.g., 72V2151L10PF), which offers lead-free TQFP variants with identical functionality and pinout.
72215LB10PFG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 7200
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 9K (512 x 18)
- Function:
- Synchronous
- Data Rate:
- 100MHz
- Access Time:
- 6.5ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 60mA
- Bus Directional:
- Uni-Directional
- Expansion Type:
- Depth, Width
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- No
- FWFT Support:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
72215LB10PFG8 FAQ
1.How can I place an order for 72215LB10PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 72215LB10PFG8 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 72215LB10PFG8 reliable?
The price and inventory of 72215LB10PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72215LB10PFG8 is usually 5 days.
3.What payment methods are accepted for 72215LB10PFG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72215LB10PFG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 72215LB10PFG8?
72215LB10PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72215LB10PFG8 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 72215LB10PFG8?
For technical support, including 72215LB10PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72215LB10PFG8 requirements.
6.How does Aetrix verify that 72215LB10PFG8 is sourced from the original manufacturer or authorized distributors?
All 72215LB10PFG8 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 72215LB10PFG8 meets industry standards.
7.What is the process for return or replacement of 72215LB10PFG8?
All 72215LB10PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 72215LB10PFG8, 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 72215LB10PFG8 part is unused and in its original packaging.
Return procedure for 72215LB10PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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