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Renesas 7200L12JG
- Part No.:
- 7200L12JG
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
7200L12JG.pdf
- Description:
- IC FIFO ASYNC 256X9 12NS 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
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Product details
Overview
IDT7200L12JG from Renesas Electronics (formerly IDT) is a 256 x 9-bit asynchronous CMOS FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 12 ns access time, ultra-high-speed operation, dual-port architecture with independent read/write control, and status flags (Empty, Full, Half-Full). It is deployed in legacy industrial communications interfaces requiring deterministic latency and parity-capable 9-bit data paths.
For engineers reviewing the IDT7200L12JG datasheet, IDT7200L12JG pinout, IDT7200L12JG application, or IDT7200L12JG equivalent, key selection criteria include its 256-word depth, 9-bit width with parity support, 12 ns access timing, TSSOP-32 package compatibility, and retransmit capability for protocol recovery - all critical for embedded serial bridge and multiprocessing buffer designs.
Technical Context
The IDT7200L12JG implements a ring-pointer-based FIFO architecture with no external address bus required; data flows sequentially via Write (W) and Read (R) strobes. Its internal logic maintains separate read and write pointers, enabling true asynchronous, simultaneous read/write operations without arbitration overhead.
It supports three operating modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XO/XI), and Width Expansion (parallel devices for >9-bit words). The FL/RT pin serves dual roles - First Load in expansion mode and Retransmit enable in single-device mode - with RT resetting the read pointer to zero while preserving the write pointer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256 x 9-bit (2,304 bits total); supports parity bit usage in 9-bit data path for error detection in serial comms. |
| Access Time (tA) | 12 ns max (commercial temp range); enables ≤83.3 MHz effective throughput in flow-through mode. |
| 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 max (80 mA @ 5.5 V); Power-down: 28 mW max (5 mA) - suitable for low-duty-cycle buffering. |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for use in factory automation and telecom line cards. |
| Status Flags | EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out); real-time boundary monitoring without software polling. |
| Retransmit Function | RT pulse resets read pointer to start address; enables protocol-level data retransmission without host CPU intervention. |
Pinout & Package
Package: 32-pin Plastic Leaded Chip Carrier (PLCC), J-lead variant (J32-1), body size 13.97 mm × 13.97 mm, lead pitch 1.27 mm. RoHS-compliant green finish (suffix G).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Input Bus | 9-bit parallel input path; supports parity bit assignment at user discretion for UART/HDLC framing. |
| Q0–Q8 | Data Output Bus | 3-state outputs enabled only during active read (R = LOW); high-impedance otherwise for bus sharing. |
| W | Write Enable Strobe | Falling-edge triggered; initiates write on next clock edge; requires tDS = 9 ns data setup before edge. |
| R | Read Enable Strobe | Falling-edge triggered; outputs valid after tA = 12 ns; disables output bus after tRHZ = 12 ns. |
| RS | Asynchronous Reset | Active LOW; resets both read/write pointers to location zero; required before first write after power-up. |
| FL/RT | First Load / Retransmit Control | In single-device mode (XI = GND): RT function; pulse LOW to restart read sequence from beginning. |
| EF | Empty Flag Output | Open-drain, active LOW; asserts when read pointer = write pointer; prevents invalid reads. |
| FF | Full Flag Output | Open-drain, active LOW; asserts when write pointer = read pointer – 1; blocks further writes. |
| XO/HF | Expansion Out / Half-Full Flag | Dual-function: HF = active LOW when ≥128 words stored (in single mode); XO = daisy-chain pulse in depth expansion. |
| XI | Expansion In | Grounded for single-device operation; tied to XO of prior device in depth expansion chain. |
| VCC, GND | Power Supply | Single 5 V supply; decoupling recommended per datasheet layout guidelines for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Dual-Port Operation | Independent W and R clocks allow seamless bridging between systems with unrelated timing domains. |
| Auto-Retransmit Capability | RT pulse restores read pointer to start address without affecting write pointer - essential for retry-based protocols. |
| Expandable Architecture | Supports unlimited depth (via XI/XO daisy chain) and width (parallel devices) - scalable from 256×9 to multi-kiloword buffers. |
| 9-Bit Data Path with Parity Option | Extra bit enables hardware parity generation/checking - critical for legacy RS-485, MIL-STD-1553, and HDLC links. |
| Low-Power CMOS Design | 440 mW active / 28 mW standby power enables use in thermally constrained industrial enclosures. |
Applications
| Industrial Serial Bridge | Multiprocessor Memory Buffer |
|---|---|
|
Use Scenario: Isolating UART/RS-422 peripherals from a microcontroller with bursty traffic patterns. IC Role / Device Role / Timing Role: Asynchronous rate-matching FIFO absorbing transmit/receive jitter between CPU and serial PHY. Use Value: Eliminates software-driven circular buffers and interrupt overhead; guarantees deterministic 12 ns latency for time-critical command responses. |
Use Scenario: Sharing data between two independent processors with non-synchronized clocks. IC Role / Device Role / Timing Role: Dual-port memory acting as handshake-free inter-processor communication channel. Use Value: Enables lock-free data exchange using EF/FF flags - no shared memory arbitration logic required. |
| Legacy Telecom Line Card | MIL-STD-1553B Interface Buffer |
|
Use Scenario: Buffering T1/E1 framing data between framer ASIC and DSP subsystem. IC Role / Device Role / Timing Role: Depth-expanded FIFO array (e.g., 3× IDT7200) providing 768-word depth for jitter tolerance. Use Value: Absorbs up to 768 × 9-bit frames of timing skew without packet loss or CPU intervention. |
Use Scenario: Supporting 1553B BC/RT message queuing in avionics subsystems. IC Role / Device Role / Timing Role: 9-bit FIFO storing command/status words with parity bit for error-checked transfers. Use Value: Meets MIL-STD-883 Class B requirements; HF flag triggers early DMA prefetch to avoid bus contention. |
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 256×9 FIFO; 3.3 V supply; 2.5 ns access; higher speed but incompatible voltage/logic family. | Used in high-speed test equipment where ECL timing margins dominate; not drop-in replaceable due to VCC and level-shifting needs. | Select only if system already uses ECL logic and requires sub-5 ns latency; requires level translators for 5 V interfaces. |
| Renesas IDT7202LA25JG | 1,024×9 organization; 25 ns access; same PLCC-32 package; higher depth but slower timing. | Suitable for applications needing deeper buffering (e.g., video frame sync) where 12 ns speed is not mandatory. | Choose when memory depth >256 words is required and 25 ns access suffices; pin-compatible but larger footprint not needed. |
Compared with IDT7200L12JG, the MC100E131FN delivers faster access but demands full ECL infrastructure, while the IDT7202LA25JG trades speed for quadrupled depth - making the IDT7200L12JG optimal for latency-sensitive, space-constrained 256-word buffering in 5 V industrial systems.
Availability
IDT7200L12JG is available at Aetrix Electronics and suitable for industrial serial bridges, multiprocessor memory buffers, and legacy telecom line cards requiring stable component supply amid end-of-life transitions.
Supply support for IDT7200L12JG 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
IDT7200L12JG belongs to the legacy IDT72xx asynchronous FIFO product line, designed specifically for deterministic, low-latency data buffering in mixed-clock-domain systems such as industrial controllers and military avionics interfaces.
FAQ
What is the memory depth and data width of the IDT7200L12JG?
The IDT7200L12JG provides a fixed 256-word depth with a 9-bit data width. This configuration supports 8-bit data plus one parity bit - a deliberate design for error-checked serial communications like RS-485, HDLC, or MIL-STD-1553B. It cannot be reconfigured to other depths or widths internally; expansion requires external chaining or parallelization.
Does the IDT7200L12JG support 3.3 V operation?
No, the IDT7200L12JG is specified only for 4.5 V to 5.5 V operation. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output drive levels are optimized for 5 V TTL/CMOS logic families. Interfacing with 3.3 V systems requires level translation on all signal lines, including D0–D8, Q0–Q8, W, R, and flag outputs.
How does the retransmit (RT) function work in the IDT7200L12JG?
In the IDT7200L12JG, pulsing the FL/RT pin LOW resets the internal read pointer to location zero while leaving the write pointer unchanged. This enables immediate re-reading of buffered data - useful for protocol retries or diagnostic replay. The RT function is only active in Single Device Mode (XI grounded) and is disabled in Depth Expansion Mode.
Is the IDT7200L12JG still in production?
The IDT7200L12JG entered End-of-Life (EOL) per Renesas PDN# SP-17-02, with last-time-buy expiring June 15, 2018. Aetrix Electronics maintains limited legacy inventory and offers traceable, tested units for ongoing industrial and defense maintenance programs, subject to availability verification.
What package type is used for the IDT7200L12JG?
The IDT7200L12JG uses a 32-pin Plastic Leaded Chip Carrier (PLCC) package, identified by ordering code "J" and reference code J32-1. It features a 1.27 mm lead pitch, 13.97 mm × 13.97 mm body, and green (RoHS-compliant) finish indicated by the "G" suffix in the part number.
7200L12JG 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:
- 2.25K (256 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)
7200L12JG FAQ
1.How can I place an order for 7200L12JG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7200L12JG 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 7200L12JG reliable?
The price and inventory of 7200L12JG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7200L12JG is usually 5 days.
3.What payment methods are accepted for 7200L12JG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7200L12JG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7200L12JG?
7200L12JG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7200L12JG 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 7200L12JG?
For technical support, including 7200L12JG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7200L12JG requirements.
6.How does Aetrix verify that 7200L12JG is sourced from the original manufacturer or authorized distributors?
All 7200L12JG 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 7200L12JG meets industry standards.
7.What is the process for return or replacement of 7200L12JG?
All 7200L12JG units undergo pre-shipment inspection (PSI). If there is an issue with 7200L12JG, 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 7200L12JG part is unused and in its original packaging.
Return procedure for 7200L12JG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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