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Renesas 72V05L15JG8
- Part No.:
- 72V05L15JG8
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
72V05L15JG8.pdf
- Description:
- IC FIFO ASYNC 8KX9 15NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,888
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Product details
Overview
72V05L15JG8 from Renesas Electronics (formerly IDT) is a 3.3 V CMOS asynchronous FIFO memory with 8,192 × 9-bit depth and width, supporting simultaneous read/write operations, 15 ns access time, and industrial temperature range (–40°C to +85°C). It implements dual-port first-in/first-out buffering for rate-matching between mismatched data streams in communication interfaces and embedded controllers.
For engineers reviewing the 72V05L15JG8 datasheet, 72V05L15JG8 pinout, 72V05L15JG8 application, or 72V05L15JG8 equivalent, key selection considerations include its 9-bit data bus with parity support, auto-retransmit capability, status flag logic (EF/FF/HF), PLCC-32 packaging, and compatibility with legacy IDT720x systems requiring low-power 3.3 V operation.
Technical Context
The 72V05L15JG8 uses ring-pointer architecture to manage sequential data flow without external address lines, enabling true asynchronous operation with independent read and write clocks. Its internal RAM array is organized as 8,192 words × 9 bits, supporting both single-device and depth/width expansion modes via XI/XO daisy-chaining and parallel control signal routing.
It features three dedicated status flags - Empty (EF), Full (FF), and Half-Full (HF) - generated by pointer comparison logic, plus Retransmit (RT) and Reset (RS) controls that manipulate read pointer position without affecting write pointer state. The device operates across 3.0–3.6 V supply and meets industrial reliability requirements with tested leakage currents ≤±1 µA and output drive capability of ±50 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 8,192 × 9 bits - supports up to 8,192 data words with 9-bit payload including optional parity bit |
| Access Time (tA) | 15 ns max - enables high-speed data transfer at up to 40 MHz shift frequency in commercial grade |
| Supply Voltage (VCC) | 3.0 V to 3.6 V - compatible with modern 3.3 V logic families and low-power system rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Power Consumption | Active: ≤60 mA (≤198 mW at 3.3 V); Power-down: ≤5 mA - reduces thermal load in always-on buffers |
| Status Flags | EF, FF, HF outputs - provide real-time buffer occupancy feedback for handshake-free flow control |
| Retransmit Capability | RT input resets read pointer to start - enables repeat transmission without host CPU intervention |
Pinout & Package
72V05L15JG8 is housed in a 32-pin Plastic Leaded Chip Carrier (PLCC, J32-1) package with standard pin pitch and surface-mount footprint. Pin 1 is marked by index notch on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Input Bus | 9-bit parallel input path; accepts data on falling edge of W; supports parity bit assignment |
| Q0–Q8 | Data Output Bus | 9-bit tri-state output; driven only during active read cycle; high-impedance when R = HIGH |
| W | Write Enable | Falling-edge-triggered write strobe; initiates storage into next available location if FF = HIGH |
| R | Read Enable | Falling-edge-triggered read strobe; outputs current word if EF = HIGH; blocks reads when EF = LOW |
| RS | Reset Input | Synchronous reset: sets both read/write pointers to zero; required before first write after power-up |
| FL/RT | First Load / Retransmit | In single-device mode: RT resets read pointer; in depth expansion: FL selects first device in chain |
| XI | Expansion In | Grounded for single-device mode; tied to XO of prior device in depth expansion daisy chain |
| XO/HF | Expansion Out / Half-Full Flag | In single mode: HF indicates ≥50% fill; in expansion: XO pulses to next device at last-word write |
| EF | Empty Flag Output | Active-low signal indicating no valid data remains; used to gate R strobes in host controller |
| FF | Full Flag Output | Active-low signal indicating no further writes allowed; used to gate W strobes in host controller |
| VCC, GND | Power Supply | Single 3.3 V supply rail; decoupling required per PLCC layout guidelines to maintain 15 ns timing integrity |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Dual-Port Architecture | Enables independent read/write clock domains without synchronization logic or FIFO management firmware |
| 9-Bit Data Width with Parity Support | Allows inclusion of one parity bit per word for error detection in serial communications and telemetry links |
| Auto-Retransmit Function | RT pulse restores read pointer to origin while preserving write pointer - eliminates need for host to track buffer state |
| Expandable Memory Depth | Multiple 72V05L15JG8 devices can be cascaded via XI/XO to build larger FIFOs (e.g., 24,576 × 9) without external address decoding |
| Industrial Temperature Qualification | Guaranteed operation from –40°C to +85°C with full AC/DC specs - suitable for factory automation and transportation electronics |
Applications
| Industrial Serial Bridge | Legacy Bus Rate Matching |
|---|---|
Use Scenario: Bridging RS-485 fieldbus to UART-based microcontroller with mismatched baud rates. IC Role / Device Role / Timing Role: Asynchronous FIFO buffer absorbing burst transmissions and smoothing variable latency between physical and logical layers. Use Value: Eliminates software polling or interrupt overhead by providing hardware handshaking via EF/FF flags and enabling deterministic data delivery at 15 ns access speed. |
Use Scenario: Interfacing an ISA-bus peripheral to a modern ARM SoC with different clock domains and timing constraints. IC Role / Device Role / Timing Role: Rate buffer isolating slow legacy I/O from high-speed processor bus; absorbs timing skew during DMA transfers. Use Value: Prevents data loss during bus arbitration gaps using full/half-full flags and supports width expansion to match 16-bit ISA data paths. |
| Telemetry Data Aggregation | Real-Time Control Loop Buffer |
Use Scenario: Collecting sensor readings from multiple CAN nodes into a central gateway before packetization for wireless upload. IC Role / Device Role / Timing Role: First-in/first-out staging memory holding raw 9-bit samples until host firmware schedules transmission. Use Value: Enables retransmission of unacknowledged packets via RT pin without CPU involvement, improving link reliability in noisy RF environments. |
Use Scenario: Storing actuator command history in motor control systems where safety-critical commands must be replayed on fault recovery. IC Role / Device Role / Timing Role: Deterministic command queue ensuring strict ordering and atomic rollback of control sequences. Use Value: Hardware-level retransmit capability allows immediate restoration of last known good state after watchdog reset, meeting SIL-2 timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 72V05L25JG8 | Slower 25 ns access time; identical pinout, voltage, and feature set | Suitable for lower-frequency designs where 40 MHz shift rate is unnecessary | Select when system timing budget allows relaxed tA and lower power consumption is prioritized over peak throughput |
| 72V05L35JG8 | 35 ns access time; same package and functional interface | Targeted at cost-sensitive industrial applications with moderate bandwidth needs | Choose for legacy upgrades where existing PCB layout must be preserved but performance margin is sufficient |
Compared with 72V05L15JG8, the 72V05L25JG8 and 72V05L35JG8 offer identical functionality and pin compatibility but trade off access speed for reduced power draw and cost-making them viable alternatives when 15 ns timing is not required for system-level throughput.
Availability
72V05L15JG8 is available at Aetrix Electronics and suitable for industrial serial bridge, legacy bus rate matching, telemetry data aggregation, and real-time control loop buffer applications requiring stable component supply and long-term lifecycle support.
Supply support for 72V05L15JG8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT markets.
The 72V05L15JG8 belongs to Renesas' legacy IDT FIFO product line, designed specifically for asynchronous data buffering in mixed-clock-domain systems requiring deterministic latency and robust flag signaling.
FAQ
What is the memory organization of the 72V05L15JG8?
The 72V05L15JG8 implements an 8,192 × 9-bit asynchronous FIFO memory array. This means it stores up to 8,192 words, each 9 bits wide - allowing use of one bit for parity or control while maintaining 8-bit data payload. The architecture uses ring pointers for automatic sequential addressing, eliminating the need for external address generation logic in the host system.
Does the 72V05L15JG8 support industrial temperature operation?
Yes, the 72V05L15JG8 is fully specified for industrial temperature range operation from –40°C to +85°C. All DC and AC electrical characteristics-including 15 ns access time, input/output voltage thresholds, leakage currents, and flag timing-are guaranteed across this range when powered at 3.3 V ± 0.3 V.
How does the Retransmit (RT) function work on the 72V05L15JG8?
The RT input on the 72V05L15JG8 resets the internal read pointer to the first memory location while leaving the write pointer unchanged. When pulsed LOW, it enables retransmission of buffered data from the beginning without host CPU intervention. This feature is only active in single-device mode and is disabled during depth expansion.
Can multiple 72V05L15JG8 devices be connected for greater depth?
Yes, the 72V05L15JG8 supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. By daisy-chaining devices - connecting XO of one to XI of the next - users can construct FIFOs with extended depth (e.g., 24,576 × 9). External logic is required to OR-combine EF and FF signals across all devices for system-level status reporting.
Is the 72V05L15JG8 pin-compatible with older 5 V IDT720x FIFOs?
No, the 72V05L15JG8 is not pin-compatible with the 5 V IDT720x family due to differing supply voltage requirements and updated timing specifications. However, it is functionally compatible: identical pin functions, flag behavior, and control protocol allow migration with board-level redesign limited to power supply and level-shifting adjustments.
72V05L15JG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 72K (8K x 9)
- Function:
- Asynchronous
- Data Rate:
- 40MHz
- Access Time:
- 15ns
- Voltage - Supply:
- 3 V ~ 3.6 V
- Current - Supply (Max):
- 75mA
- 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:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (14x11.46)
72V05L15JG8 FAQ
1.How can I place an order for 72V05L15JG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 72V05L15JG8 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 72V05L15JG8 reliable?
The price and inventory of 72V05L15JG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V05L15JG8 is usually 5 days.
3.What payment methods are accepted for 72V05L15JG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V05L15JG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 72V05L15JG8?
72V05L15JG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72V05L15JG8 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 72V05L15JG8?
For technical support, including 72V05L15JG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V05L15JG8 requirements.
6.How does Aetrix verify that 72V05L15JG8 is sourced from the original manufacturer or authorized distributors?
All 72V05L15JG8 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 72V05L15JG8 meets industry standards.
7.What is the process for return or replacement of 72V05L15JG8?
All 72V05L15JG8 units undergo pre-shipment inspection (PSI). If there is an issue with 72V05L15JG8, 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 72V05L15JG8 part is unused and in its original packaging.
Return procedure for 72V05L15JG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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