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Renesas 7201LA12JG
- Part No.:
- 7201LA12JG
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
7201LA12JG.pdf
- Description:
- IC FIFO ASYNC 512X9 12NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,453
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Product details
Overview
7201LA12JG 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 12 ns access time, ultra-low active power (440 mW max), full/half-full/empty status flags, and retransmit capability. It is used in industrial communications interfaces requiring deterministic latency and overflow/underflow protection.
For engineers reviewing the 7201LA12JG datasheet, 7201LA12JG pinout, 7201LA12JG application, or 7201LA12JG equivalent, this page delivers verified technical context, real-world timing constraints, pin-level functional roles, and validated alternatives - all grounded in the official IDT7201LA specification and Renesas product documentation.
Technical Context
The 7201LA12JG implements a dual-port, first-in/first-out architecture with independent read/write pointers managed by internal ring logic-no external address generation required. Its 9-bit data width supports parity or control bits, enabling error-checked serial/data-link layer buffering.
It operates asynchronously with simultaneous read/write cycles, supports single-device, depth-expansion, and width-expansion modes, and includes auto-retransmit (RT) to reset the read pointer without affecting the write pointer-critical for protocol recovery in UART, HDLC, or custom packetized links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 512 × 9 bits - provides exact buffer capacity for 512 words of 9-bit data (e.g., 8-bit payload + 1 parity bit) |
| Access Time (tA) | 12 ns - enables reliable operation at up to 50 MHz shift frequency in commercial/industrial temperature ranges |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic families and legacy industrial power rails |
| Power Consumption | Active: ≤440 mW; Power-down: ≤28 mW - reduces thermal load in dense PCB layouts and extends system-level power budget headroom |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation, motor drives, and telecom line cards |
| Status Flags | EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out) - enables hardware flow control without CPU polling or interrupt overhead |
| Retransmit Function | RT input resets read pointer to start on falling edge - supports deterministic retransmission in protocol stacks without software intervention |
Pinout & Package
7201LA12JG is housed in a 32-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration (J32-1), lead finish SnPb (EOL as of June 2018), and 600-mil body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Input Bus | 9-bit parallel input path; accepts data on falling edge of W; latched into FIFO array independently of read activity |
| Q0–Q8 | Data Output Bus | 9-bit high-impedance output; driven only when R = LOW; data valid within tA after R falling edge |
| W | Write Enable | Falling-edge-triggered write strobe; initiates storage if FF = HIGH; blocks writes when FF = LOW to prevent overflow |
| R | Read Enable | Falling-edge-triggered read strobe; outputs next word if EF = HIGH; blocks reads when EF = LOW to prevent underflow |
| RS | Reset Input | Active-LOW synchronous reset; forces both read/write pointers to location zero; required before first write after power-up |
| FL/RT | First Load / Retransmit | Dual-function input: grounded for depth expansion "first device"; pulsed LOW in single mode to reset read pointer to start |
| XI | Expansion In | Ground in single-device mode; tied to XO of prior device in depth expansion daisy chain to enable cascading |
| XO/HF | Expansion Out / Half-Full Flag | In single mode: HF goes LOW when ≥256 locations filled; in depth mode: pulses to next device upon last-location write |
| EF, FF | Status Outputs | Open-drain or totem-pole (per variant); EF = LOW = empty; FF = LOW = full; used for hardware handshaking |
| 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 Operation | Enables independent, concurrent read/write cycles across unrelated clocks-eliminates need for clock domain crossing logic |
| Hardware Flow Control Flags | EF, FF, and HF outputs provide real-time buffer state visibility, allowing deterministic handshaking without software polling |
| Retransmit Capability | Pulsing RT LOW resets read pointer to origin while preserving write pointer position-essential for retry-based communication protocols |
| Expandable Architecture | Supports unlimited depth expansion (daisy-chained) and width expansion (parallel devices)-scalable from 512×9 to multi-kiloword buffers |
| Military-Grade Qualification | Compliant with MIL-STD-883 Class B and SMD drawings 5962-89666/5962-89863-validated for harsh-environment industrial and defense applications |
Applications
| Industrial Serial Bridge | Legacy Bus Rate Matching |
|---|---|
|
Use Scenario: Bridging RS-485 fieldbus (230 kbps) to a 10 MHz microcontroller peripheral bus with no shared clock. IC Role / Device Role / Timing Role: Asynchronous FIFO buffer absorbing bursty sensor data while smoothing throughput to match MCU processing rate. Use Value: Eliminates data loss during transient overruns; 512-word depth accommodates worst-case 2.2 ms burst at 230 kbps with margin. |
Use Scenario: Interfacing an ISA-bus DMA controller (8 MHz) to a slower 16-bit DSP (40 MHz instruction rate but limited I/O bandwidth). IC Role / Device Role / Timing Role: Rate-adapting buffer decoupling burst DMA transfers from DSP's irregular memory access pattern. Use Value: Prevents ISA bus lockups; 12 ns access ensures sub-cycle latency alignment with 8 MHz bus timing. |
| HDLC Protocol Engine | Test Equipment Data Capture |
|
Use Scenario: Storing received HDLC frames (with 8-bit payload + 1-bit CRC flag) in telecom line interface cards before CRC validation and forwarding. IC Role / Device Role / Timing Role: First-in/first-out frame buffer with parity-capable 9-bit width supporting HDLC flag/CRC tagging. Use Value: Enables frame-level retransmit via RT pin upon CRC failure-no software stack involvement required. |
Use Scenario: Capturing high-speed digital stimulus-response sequences (e.g., 50 MHz digital pattern generator output) for offline analysis in ATE systems. IC Role / Device Role / Timing Role: High-speed acquisition buffer accepting bursts faster than host PCIe transfer rate, using FF/EF for trigger-controlled capture. Use Value: 12 ns access + hardware flags allow precise edge-aligned capture windowing without CPU overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 7201LA15JG | 15 ns access time (vs. 12 ns); otherwise identical pinout, function, and timing structure | Suitable where 3 ns timing margin is acceptable-reduces sensitivity to trace skew and noise in less demanding layouts | Select when system timing budget allows relaxed access; same footprint and firmware compatibility |
| 7201LA20JG | 20 ns access time; lower ICC1 (active current) due to reduced speed grade | Better suited for thermally constrained industrial enclosures where power dissipation <350 mW is mandatory | Choose for cost-sensitive or low-power deployments where 50 MHz shift frequency is not required |
Compared with 7201LA12JG, the 15 ns and 20 ns variants trade deterministic 12 ns latency for improved noise immunity and reduced power draw-making them viable drop-in alternatives when system-level timing slack exists or thermal limits constrain active power.
Availability
7201LA12JG is available at Aetrix Electronics and suitable for industrial serial bridges, legacy bus rate matching, and HDLC protocol engines requiring stable component supply amid end-of-life transitions.
Supply support for 7201LA12JG 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 memory solutions for automotive, industrial, and infrastructure markets.
The IDT7200/7201/7202 family-including 7201LA12JG-was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to address deterministic buffering needs in multiprocessing, telecom, and military systems requiring asynchronous, expandable FIFOs.
FAQ
What is the memory organization of the 7201LA12JG?
The 7201LA12JG implements a 512 × 9-bit first-in/first-out memory array. This means it stores exactly 512 words, each 9 bits wide-supporting 8-bit data plus 1 parity or control bit. The architecture uses internal ring pointers, eliminating the need for external address lines or counters. This organization is fixed and cannot be reconfigured via software or pins.
Does the 7201LA12JG support depth expansion, and how is it implemented?
Yes, the 7201LA12JG supports depth expansion via daisy-chaining. It uses the XI (Expansion In) and XO/HF (Expansion Out) pins: XI of each subsequent device connects to XO of the prior one, and FL/RT is grounded only on the first device. External logic must OR all EF and FF outputs to generate composite flags. Note that RT and HF functions are disabled in depth expansion mode.
What is the purpose of the FL/RT pin on the 7201LA12JG?
The FL/RT pin on the 7201LA12JG is dual-function: in depth expansion mode, it serves as First Load (FL) and must be grounded on the first device; in single-device mode, it acts as Retransmit (RT). A LOW pulse on RT resets the internal read pointer to location zero without altering the write pointer-enabling hardware-initiated data replay for protocol recovery.
Is the 7201LA12JG still in production, and what is its EOL status?
The 7201LA12JG uses SnPb lead finish and was officially placed in End-of-Life (EOL) by Renesas (formerly IDT) with Last Time Buy expiring June 15, 2018. While no longer in active production, Aetrix Electronics maintains legacy inventory with full traceability and supports long-term industrial programs through controlled distribution and lifecycle coordination.
How does the 7201LA12JG handle power-down states?
The 7201LA12JG enters low-power standby when R, W, RS, and FL/RT are all held HIGH. In this state, ICC2 is ≤5 mA (commercial/industrial) or ≤15 mA (military), reducing total power to ≤28 mW. All internal pointers and data are retained; exit to active mode occurs synchronously on the next valid control transition, with flags stabilizing within tRSC (≤35 ns).
7201LA12JG 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:
- 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)
7201LA12JG FAQ
1.How can I place an order for 7201LA12JG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7201LA12JG 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 7201LA12JG reliable?
The price and inventory of 7201LA12JG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7201LA12JG is usually 5 days.
3.What payment methods are accepted for 7201LA12JG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7201LA12JG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7201LA12JG?
7201LA12JG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7201LA12JG 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 7201LA12JG?
For technical support, including 7201LA12JG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7201LA12JG requirements.
6.How does Aetrix verify that 7201LA12JG is sourced from the original manufacturer or authorized distributors?
All 7201LA12JG 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 7201LA12JG meets industry standards.
7.What is the process for return or replacement of 7201LA12JG?
All 7201LA12JG units undergo pre-shipment inspection (PSI). If there is an issue with 7201LA12JG, 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 7201LA12JG part is unused and in its original packaging.
Return procedure for 7201LA12JG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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