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Renesas 7201LA15JG
- Part No.:
- 7201LA15JG
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
7201LA15JG.pdf
- Description:
- IC FIFO ASYNC 512X9 15NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,058
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Product details
Overview
IDT7201LA15JG from Renesas Electronics (formerly IDT) is a 512 × 9-bit asynchronous CMOS FIFO memory IC designed for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 15 ns access time, ultra-low active power (440 mW max), and status flags (Empty, Full, Half-Full) for overflow/underflow protection. It is used in industrial communications interfaces requiring deterministic latency and retransmit capability.
For engineers reviewing the IDT7201LA15JG datasheet, IDT7201LA15JG pinout, IDT7201LA15JG application, or IDT7201LA15JG equivalent, key selection criteria include its 512-word depth, 9-bit data width with parity support, 15 ns timing grade, PLCC-32 package, and compatibility with depth/width expansion architectures in legacy embedded systems.
Technical Context
The IDT7201LA15JG implements a dual-port ring-buffer architecture with independent read/write pointers, eliminating address management overhead. Its asynchronous operation allows fully independent W/R clocks, enabling seamless bridging between processors, peripherals, or serial protocols without shared timing constraints.
It supports three operating modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XO/XI), and Width Expansion (parallel data buses). The FL/RT pin serves dual roles - First Load control in expansion mode and Retransmit trigger in single-device mode - with RT pulse resetting the read pointer to position zero while preserving write pointer state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 512 × 9-bit FIFO - provides 512 words of buffer depth with 9-bit data path supporting 8-bit data + 1 parity bit for error detection. |
| Access Time (tA) | 15 ns max - guarantees deterministic read latency under commercial/industrial conditions; enables ≤66.7 MHz shift frequency. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails; no external voltage regulation required. |
| Power Consumption | Active: 440 mW max (80 mA @ 5 V); Power-down: 28 mW max (5 mA) - reduces thermal load in dense PCB layouts. |
| Status Flags | EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out) - real-time buffer occupancy monitoring without host CPU polling overhead. |
| Retransmit Function | RT input resets read pointer to start on LOW pulse - enables protocol-level retransmission (e.g., UART frame retry) without host intervention. |
| Operating Temperature | –40°C to +85°C (industrial grade) - validated for use in factory automation, test equipment, and telecom line cards. |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), J-lead variant (J32-1), 1.27 mm pitch, 13.97 mm × 13.97 mm body size, lead finish SnPb (EOL as of June 2018).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Input Bus | 9-bit parallel input path; accepts TTL/CMOS-compatible signals for FIFO loading. |
| Q0–Q8 | Data Output Bus | 3-state outputs enabled only during active read (R = LOW); high-impedance otherwise. |
| W | Write Enable | Falling-edge-triggered write strobe; initiates storage of D0–D8 into next FIFO location if FF = HIGH. |
| R | Read Enable | Falling-edge-triggered read strobe; outputs Q0–Q8 from current FIFO location if EF = HIGH. |
| RS | Reset Input | Asynchronous active-LOW reset that sets both read/write pointers to position zero; required at power-up. |
| FL/RT | First Load / Retransmit | In single-device mode (XI = GND): RT function - LOW pulse resets read pointer. In depth expansion: FL control - grounded on first device. |
| XI | Expansion In | Grounded for single-device mode; tied to XO of prior device in daisy-chain depth expansion. |
| XO/HF | Expansion Out / Half-Full Flag | In single-device mode: HF output goes LOW when ≥256 words stored. In expansion: pulse signal to next device at last location. |
| EF | Empty Flag | Open-drain output; goes LOW when read pointer = write pointer - prevents invalid reads. |
| FF | Full Flag | Open-drain output; goes LOW when write pointer = (read pointer – 1) mod 512 - prevents overflow. |
| VCC, GND | Power Supply | Single 5 V supply; decoupling capacitor (0.1 µF) recommended per device per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Read/Write | Independent W and R clocks eliminate synchronization logic; enables bridging between disparate bus speeds (e.g., microcontroller ↔ UART). |
| Auto-Retransmit Capability | RT pulse resets read pointer without affecting write pointer - supports deterministic retransmission in protocol stacks (e.g., HDLC, custom link layers). |
| Expandable Architecture | Depth expansion (XO→XI chaining) and width expansion (parallel devices) allow scalable buffer sizes up to multi-kiloword arrays without redesign. |
| 9-Bit Data Width with Parity Option | Extra bit supports hardware parity generation/checking - critical for noise-prone industrial serial links and MIL-STD-1553 interfaces. |
| Military-Grade Compliance | Qualified per MIL-STD-883 Class B and SMD #5962-89666 - validated for extended temperature, shock, and radiation tolerance in defense avionics. |
Applications
| Industrial Serial Bridge | Legacy Bus Protocol Adapter |
|---|---|
|
Use Scenario: Buffering data between a 1 Mbps RS-485 fieldbus and a 25 MHz microcontroller with non-matching interrupt latencies. IC Role / Device Role / Timing Role: Asynchronous FIFO acting as rate-matching buffer; absorbs burst traffic while maintaining deterministic read/write timing. Use Value: Eliminates lost frames due to CPU unavailability; enables reliable 9600–115200 baud communication over noisy factory floors. |
Use Scenario: Interfacing an 8-bit ISA bus peripheral to a modern FPGA-based controller using different clock domains. IC Role / Device Role / Timing Role: Dual-port FIFO providing clock domain crossing with full/empty handshaking. Use Value: Removes metastability risk and eliminates need for custom synchronizer logic; simplifies PCB routing with fixed 32-pin PLCC footprint. |
| MIL-STD-1553B Terminal Buffer | Test Equipment Data Capture |
|
Use Scenario: Storing command/response packets in a remote terminal (RT) for aerospace vehicle subsystems. IC Role / Device Role / Timing Role: 512-word FIFO storing 1553B message blocks with parity bit; RT input triggers retransmission on CRC failure. Use Value: Meets DO-254 safety-critical timing requirements; supports built-in self-test via retransmit and flag monitoring. |
Use Scenario: Capturing high-speed analog-to-digital samples from a 10 MS/s digitizer before host transfer. IC Role / Device Role / Timing Role: Burst-mode acquisition buffer; W strobed by ADC DRDY, R strobed by DMA controller. Use Value: Prevents sample loss during PCIe transfer gaps; 15 ns access ensures minimal dead time between conversions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7201LA20JG | 20 ns access time (vs. 15 ns); same 512×9 organization, PLCC-32 package, and feature set. | Suitable where system timing budget allows relaxed latency; lower cost in volume due to broader availability. | Select when 15 ns timing margin is unnecessary and long-term supply continuity is prioritized over peak performance. |
| SN74ACT2227N | 256×8-bit TTL FIFO; 28-pin PDIP; no retransmit or half-full flag; 25 ns access time; 5 V only. | Limited depth/width; no parity bit; not qualified for industrial/military temp ranges. | Use only in cost-sensitive, low-complexity commercial designs where 512-word depth and retransmit are not required. |
Compared with IDT7201LA15JG, IDT7201LA20JG trades 5 ns speed for improved long-term availability, while SN74ACT2227N offers basic FIFO functionality at lower cost but lacks parity support, industrial temperature rating, and retransmit capability essential for robust embedded systems.
Availability
IDT7201LA15JG is available at Aetrix Electronics and suitable for industrial serial bridges, MIL-STD-1553B terminals, and test equipment data capture requiring stable component supply and legacy-compatible PLCC packaging.
Supply support for IDT7201LA15JG 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, infrastructure, and IoT applications.
IDT7201LA15JG belongs to the IDT7200L/7201LA/7202LA family of high-speed asynchronous FIFOs, engineered for deterministic data buffering in legacy and mission-critical systems requiring EOL-managed reliability and military-grade qualification.
FAQ
What is the memory depth and data width of the IDT7201LA15JG?
The IDT7201LA15JG provides a 512 × 9-bit first-in/first-out memory structure. This means it stores up to 512 words, each 9 bits wide - supporting 8-bit data plus 1 parity bit for error checking in serial communications and avionics interfaces. The IDT7201LA15JG does not support configurable word width; the 9-bit width is fixed per its datasheet specification.
Does the IDT7201LA15JG support retransmission, and how is it triggered?
Yes, the IDT7201LA15JG supports hardware retransmission via its FL/RT pin. When operated in Single Device Mode (XI grounded), pulsing RT LOW resets the internal read pointer to the first memory location while leaving the write pointer unchanged. This enables protocol-level retries without host CPU involvement. The IDT7201LA15JG requires R and W to remain HIGH during the RT pulse for correct operation.
What package type and lead finish does the IDT7201LA15JG use?
The IDT7201LA15JG uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, identified as J32-1 in IDT's ordering nomenclature. Its lead finish is SnPb (tin-lead), which was placed in End-of-Life (EOL) status with Last Time Buy expiring June 15, 2018. Aetrix Electronics maintains traceable inventory of original-IDT manufactured IDT7201LA15JG units meeting this specification.
Can multiple IDT7201LA15JG devices be cascaded for larger buffer capacity?
Yes, the IDT7201LA15JG supports both depth expansion (increasing word count) and width expansion (increasing data bus width). For depth expansion, devices are daisy-chained using XO → XI connections, with FL grounded on the first device. For width expansion, multiple IDT7201LA15JG units share common W, R, RS, and FL/RT signals while connecting D/Q lines in parallel. Status flags must be OR'd externally in depth expansion mode.
Is the IDT7201LA15JG suitable for industrial temperature operation?
Yes, the IDT7201LA15JG is rated for industrial temperature range (–40°C to +85°C), as confirmed in its DC operating conditions table and ordering information. It is also qualified to MIL-STD-883 Class B and SMD #5962-89666, making it suitable for harsh environments including factory automation, transportation systems, and defense electronics where extended thermal stability is required.
7201LA15JG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 7200
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Size:
- 4.5K (512 x 9)
- Function:
- Asynchronous
- Data Rate:
- 40MHz
- Access Time:
- 15ns
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Current - Supply (Max):
- 80mA
- 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)
7201LA15JG FAQ
1.How can I place an order for 7201LA15JG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7201LA15JG 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 7201LA15JG reliable?
The price and inventory of 7201LA15JG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7201LA15JG is usually 5 days.
3.What payment methods are accepted for 7201LA15JG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7201LA15JG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7201LA15JG?
7201LA15JG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7201LA15JG 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 7201LA15JG?
For technical support, including 7201LA15JG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7201LA15JG requirements.
6.How does Aetrix verify that 7201LA15JG is sourced from the original manufacturer or authorized distributors?
All 7201LA15JG 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 7201LA15JG meets industry standards.
7.What is the process for return or replacement of 7201LA15JG?
All 7201LA15JG units undergo pre-shipment inspection (PSI). If there is an issue with 7201LA15JG, 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 7201LA15JG part is unused and in its original packaging.
Return procedure for 7201LA15JG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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