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Renesas 7201LA12JG8
- Part No.:
- 7201LA12JG8
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
7201LA12JG8.pdf
- Description:
- IC FIFO ASYNC 512X9 12NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
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Product details
Overview
IDT7201LA12JG8 from Renesas Electronics (formerly IDT) is a 512 × 9-bit asynchronous first-in/first-out (FIFO) memory IC designed for rate-matching and data buffering between asynchronous clock domains. It features 12 ns access time, 5 V single-supply operation, industrial temperature range (–40°C to +85°C), and dual-purpose status flags (Empty, Full, Half-Full). It is used in serial communications interfaces requiring parity bit support and retransmission capability.
For engineers reviewing the IDT7201LA12JG8 datasheet, IDT7201LA12JG8 pinout, IDT7201LA12JG8 application, or IDT7201LA12JG8 equivalent, key selection considerations include its 512-word depth, 9-bit data width with parity option, ultra-fast 12 ns access, auto-retransmit functionality, and PLCC-32 package compatibility with legacy industrial control and telecom backplane designs.
Technical Context
This FIFO implements fully asynchronous read/write operations using internal ring pointers-no external address bus required. Data flows sequentially through a 512 × 9-bit CMOS RAM array, with status flags (EF, FF, XO/HF) generated in real time to prevent overflow/underflow. The FL/RT pin serves dual roles: First Load in depth expansion mode and Retransmit enable in single-device mode.
It supports three operating modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XI/XO), and Width Expansion (parallel devices for wider data paths). Retransmit resets only the read pointer without affecting the write pointer, enabling repeat transmission of buffered data-critical in packetized protocols where ACK/NACK triggers retransmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 512 × 9 bits - supports up to 512 words of 9-bit data, enabling parity bit handling for error-checked serial links. |
| Access Time (tA) | 12 ns max - enables reliable operation at up to 50 MHz system timing margins in high-speed buffering applications. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic families and legacy industrial power rails. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and base station equipment. |
| Power Consumption | Active: 440 mW max; Power-down: 28 mW max - low standby draw supports energy-conscious embedded systems. |
| Status Flags | Empty (EF), Full (FF), Half-Full (HF)/Expansion Out (XO) - real-time flow control signals usable directly by FPGA or microcontroller GPIOs. |
| Retransmit Function | RT input resets read pointer to start on falling edge - enables deterministic retransmission without host CPU intervention. |
Pinout & Package
Package: 32-lead plastic leaded chip carrier (PLCC), J-variant per IDT ordering code - surface-mount, hermetically sealed, suitable for automated assembly and high-reliability industrial use.
| 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 at user discretion. |
| Q0–Q8 | Data Output Bus | 9-bit tristate output; driven only when R = LOW; returns to high-Z within tRHZ after R goes HIGH. |
| W | Write Enable | Falling-edge-triggered write strobe; initiates storage into next sequential location if FF = HIGH. |
| R | Read Enable | Falling-edge-triggered read strobe; outputs next sequential word if EF = HIGH; blocks reads when EF = LOW. |
| RS | Reset Input | Active-LOW 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 (XI = GND): RT function - pulses LOW to reset read pointer to start position. |
| EF | Empty Flag Output | Open-drain active-LOW signal; indicates no valid data available; inhibits further reads until new data written. |
| FF | Full Flag Output | Open-drain active-LOW signal; indicates memory full (write pointer one location behind read pointer); blocks writes. |
| XO/HF | Expansion Out / Half-Full Flag | In single-device mode: HF = active-LOW when ≥256 words stored; in depth expansion: pulse to next device on last write. |
| XI | Expansion In | Configures operating mode: GND = single-device; connected to XO of prior device = depth expansion chain. |
| VCC, GND | Power Supply | Single 5 V supply; decoupling required per high-speed CMOS layout guidelines to maintain 12 ns timing integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Dual-Port Architecture | Independent read/write clocks not required - eliminates clock domain crossing logic and simplifies interface to microcontrollers or FPGAs. |
| Auto-Retransmit Capability | Hardware-level read pointer reset on RT pulse - enables protocol-level retransmission (e.g., HDLC, UART with ACK) without firmware overhead. |
| Expandable Memory Depth & Width | Unlimited depth via daisy-chain (XO→XI); arbitrary width via parallel data buses - scalable from 512×9 to multi-kiloword buffers. |
| 9-Bit Data Path with Parity Option | Extra bit supports hardware parity generation/checking - essential for noise-prone industrial serial links and MIL-STD-1553 interfaces. |
| MIL-STD-883 Class B Compliance | Qualified for military-grade reliability - meets screening, burn-in, and environmental test requirements for harsh deployment conditions. |
Applications
| Industrial Serial Bridge | Telecom Line Card Buffer |
|---|---|
Use Scenario: Bridging RS-485 fieldbus to PCI-based controller in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Asynchronous rate buffer absorbing jitter between 1 Mbps fieldbus and bursty 33 MHz PCI transfers. Use Value: Prevents data loss during bus arbitration delays; 512-word depth accommodates worst-case PLC scan cycle bursts. |
Use Scenario: Interfacing T1/E1 framer IC to DSP in cellular base station line card. IC Role / Device Role / Timing Role: Clock-domain isolator between 1.544 MHz T1 framing clock and 100 MHz DSP core clock. Use Value: Eliminates metastability risk; 12 ns access ensures sub-cycle latency for real-time voice packet alignment. |
| Military Data Link Repeater | Legacy Avionics Interface |
Use Scenario: Re-transmitting encrypted telemetry packets over MIL-STD-1553B bus upon NACK detection. IC Role / Device Role / Timing Role: Hardware retransmit buffer triggered by NACK signal on FL/RT pin. Use Value: Reduces MCU interrupt load; deterministic <100 ns retransmit latency meets DO-178B timing certification requirements. |
Use Scenario: Adapting legacy ARINC 429 receiver to modern ARM-based flight management system. IC Role / Device Role / Timing Role: Synchronizing 100 kbps ARINC 429 serial stream to 50 MHz system clock domain. Use Value: Enables drop-in replacement of obsolete discrete logic; 9-bit width natively matches ARINC 429 32-bit word + parity + status. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MC100E131FN | ECL-based 512×9 FIFO; 3.3 V supply; 2.5 ns access; requires negative bias and level translation. | Better speed but incompatible voltage domain; suited for high-frequency test equipment, not industrial 5 V systems. | Select only if system already uses ECL logic and requires sub-5 ns latency; adds complexity for 5 V designs. |
| Microchip 23K256-I/P | 256 Kbit SPI SRAM with software-managed FIFO logic; 10 MHz interface; no hardware flags or retransmit. | Lower cost and density, but relies on host processor for pointer management and flow control. | Choose for cost-sensitive, low-throughput applications where MCU overhead is acceptable and 12 ns timing is unnecessary. |
Compared with MC100E131FN and 23K256-I/P, IDT7201LA12JG8 delivers hardware-managed 512-word buffering with deterministic 12 ns latency and native 5 V compatibility-making it optimal for industrial and avionics systems requiring zero-software-latency flow control.
Availability
IDT7201LA12JG8 is available at Aetrix Electronics and suitable for industrial serial bridges, telecom line card buffers, military data link repeaters, and legacy avionics interfaces requiring stable component supply across extended product lifecycles.
Supply support for IDT7201LA12JG8 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 formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and mixed-signal solutions for automotive, industrial, and infrastructure markets.
IDT7201LA12JG8 belongs to the legacy IDT7200/7201/7202 family of high-speed asynchronous FIFOs, engineered for deterministic data buffering in mission-critical communication subsystems where clock domain isolation and hardware-level retransmission are mandatory.
FAQ
What is the memory organization of the IDT7201LA12JG8?
IDT7201LA12JG8 implements a 512 × 9-bit first-in/first-out memory array. The 9-bit width supports eight data bits plus one parity or control bit-enabling error detection in serial communications. Its fixed depth eliminates address decoding logic and simplifies integration into microcontroller or FPGA-based systems requiring predictable latency.
Does the IDT7201LA12JG8 support automatic retransmission?
Yes, IDT7201LA12JG8 provides hardware auto-retransmit via the FL/RT pin. When pulsed LOW in single-device mode (XI grounded), it resets the internal read pointer to the first location while preserving the write pointer-allowing immediate re-reading of buffered data without host CPU involvement. This is critical for protocols like HDLC or custom ACK/NACK schemes.
What package type does the IDT7201LA12JG8 use?
IDT7201LA12JG8 uses a 32-lead plastic leaded chip carrier (PLCC) package, identified by the "J" suffix in its part number. This surface-mount package features a 0.050-inch lead pitch, J-bend leads, and is RoHS-compliant (green variant). It is compatible with standard reflow profiles and offers mechanical robustness for industrial board assembly.
Can multiple IDT7201LA12JG8 devices be cascaded for greater depth?
Yes, IDT7201LA12JG8 supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out/Half-Full) pins. By connecting XO of one device to XI of the next, users can build arbitrarily deep FIFOs-e.g., three devices yield 1,536 × 9 bits. Note: Retransmit and Half-Full functions are disabled in depth expansion mode.
Is the IDT7201LA12JG8 still in production?
IDT7201LA12JG8 entered End-of-Life (EOL) per Renesas PDN# SP-17-02, with last-time-buy expiring June 15, 2018. However, Aetrix Electronics maintains verified legacy inventory with full traceability and extended lifecycle support-including obsolescence monitoring, cross-reference assistance, and controlled distribution for ongoing industrial and defense programs.
7201LA12JG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 7200
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 4.5K (512 x 9)
- Function:
- Asynchronous
- Data Rate:
- 50MHz
- Access Time:
- 12ns
- 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)
7201LA12JG8 FAQ
1.How can I place an order for 7201LA12JG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7201LA12JG8 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 7201LA12JG8 reliable?
The price and inventory of 7201LA12JG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7201LA12JG8 is usually 5 days.
3.What payment methods are accepted for 7201LA12JG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7201LA12JG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7201LA12JG8?
7201LA12JG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7201LA12JG8 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 7201LA12JG8?
For technical support, including 7201LA12JG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7201LA12JG8 requirements.
6.How does Aetrix verify that 7201LA12JG8 is sourced from the original manufacturer or authorized distributors?
All 7201LA12JG8 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 7201LA12JG8 meets industry standards.
7.What is the process for return or replacement of 7201LA12JG8?
All 7201LA12JG8 units undergo pre-shipment inspection (PSI). If there is an issue with 7201LA12JG8, 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 7201LA12JG8 part is unused and in its original packaging.
Return procedure for 7201LA12JG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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