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Renesas 7009L20PFI
- Part No.:
- 7009L20PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7009L20PFI.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
7009L20PFI from IDT is a high-speed 128K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial grade), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/INT/BUSY arbitration logic - used in real-time multi-processor interconnects requiring concurrent memory access without software overhead.
For engineers reviewing the 7009L20PFI datasheet, 7009L20PFI pinout, 7009L20PFI application, or 7009L20PFI equivalent, this page delivers verified timing specs (tAA = 20 ns, tRC = 20 ns), dual-port arbitration behavior (M/S-selectable master/slave BUSY mode), industrial temperature support (–40°C to +85°C), and confirmed TQFP-100 package mapping - all extracted from IDT's official 7009L datasheet Rev. Jan.12.22.
Technical Context
The 7009L20PFI implements fully asynchronous dual-port operation: each port (left/right) has dedicated address (A0L–A16L / A0R–A16R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CE0/CE1, R/W, OE, SEM, INT, BUSY). Its on-chip arbitration logic resolves simultaneous access via hardware BUSY flag assertion (tBAA ≤ 20 ns) and priority setup (tAPS = 5 ns), eliminating need for external glue logic in master/slave cascaded configurations.
It integrates eight dedicated semaphore latches (addressed by A0–A2) accessible via SEM = VIL, enabling token-passing resource locking between processors; interrupt flags (INTL/INTR) are triggered by writes to fixed addresses (1FFFEh/1FFFFh), with tINS/tINR ≤ 20 ns. All I/Os are TTL-compatible push-pull, no pull-ups required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8 bits (1,048,576 total bits), two independent address/data/control ports |
| Access Time (tAA) | 20 ns max - guarantees valid read data within 20 ns of address or enable assertion, critical for real-time processor coherency |
| Read Cycle Time (tRC) | 20 ns max - defines minimum interval between successive reads on same port, enabling 50 MHz sustained throughput |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating, validated per IDT spec |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; all VCC pins must be connected (per datasheet Note 1) |
| Package | 100-pin TQFP (14 mm × 14 mm × 1.4 mm body) - surface-mount, RoHS-compliant, thermal pad optional |
| Power Consumption | Active: 200 mA typ (1 W @ 5 V); Full standby: 0.2 mA typ - low-power mode activated by CMOS-level CE deassertion |
Pinout & Package
7009L20PFI is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad (optional). Pin 1 is top-left corner (marked dot), numbering proceeds counterclockwise. GND and VCC pins are distributed across all four sides for optimal noise suppression and power integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Dual-port chip enables (left/right) | Independent TTL/CMOS-selectable enables per port; CE1 enables depth expansion without external logic |
| R/WL / R/WR | Read/write control (left/right) | Active-low write strobe; controls direction of data flow on respective I/O bus |
| OEL / OER | Output enable (left/right) | Tri-states I/O pins when deasserted; allows bus sharing in multi-device systems |
| A0L–A16L / A0R–A16R | Address inputs (left/right) | 17-bit addressing per port supports full 128K space; no shared address lines |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional data (left/right) | 8-bit parallel data path per port; true dual-port cells allow simultaneous read of same location |
| SEML / SEMR | Semaphore enable (left/right) | Activates 8-bit semaphore latch bank (A0–A2 addressed) when CE = VIH and SEM = VIL |
| INTL / INTR | Interrupt flag outputs (left/right) | Push-pull outputs asserted on write to 1FFFEh (INTL) or 1FFFFh (INTR); require no external pull-ups |
| BUSYL / BUSYR | Busy flag (input/output, M/S-configurable) | When M/S = VIH: output indicating port contention; when M/S = VIL: input that inhibits writes on asserted side |
| M/S | Master/Slave select | VIH configures device as master (BUSY outputs); VIL configures as slave (BUSY inputs); determines arbitration role in cascaded arrays |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from identical memory locations on both ports - eliminates read collision risk in lock-free data exchange |
| Hardware semaphore logic | Eight dedicated latches (A0–A2) accessed via SEM = VIL; enables atomic token-passing without CPU intervention or wait states |
| Configurable BUSY arbitration | M/S pin selects master (push-pull BUSY output) or slave (BUSY input); supports scalable width-expanded arrays with single-master BUSY distribution |
| Asynchronous dual-port operation | No clock required; left/right ports operate independently with full timing isolation - no performance penalty from cross-port activity |
| Low-power standby modes | Four distinct standby states (ISB1–ISB4) down to 0.2 mA typ; controlled by CE/SEM levels - ideal for burst-mode embedded systems |
Applications
| Industrial PLC Backplane Interconnect | Real-Time Avionics Data Buffer |
|---|---|
Use Scenario: Two independent CPUs share sensor/actuator data via a common memory region on a ruggedized backplane. IC Role / Device Role / Timing Role: 7009L20PFI acts as a zero-latency, hardware-synchronized memory bridge with BUSY-driven arbitration preventing write collisions during deterministic scan cycles. Use Value: Eliminates software mutex overhead and ensures sub-20 ns response to shared resource requests - meeting IEC 61131-3 cycle-time requirements. |
Use Scenario: Flight control computer and health monitoring unit exchange telemetry and command packets in a DO-254-certified avionics module. IC Role / Device Role / Timing Role: 7009L20PFI serves as a fault-tolerant mailbox with semaphore-protected message queues and interrupt-triggered packet arrival notification. Use Value: Guarantees atomic flag updates (tSPS = 5 ns) and deterministic interrupt latency (tINS ≤ 20 ns), satisfying RTCA/DO-254 Level A timing assurance. |
| Medical Imaging Pipeline Buffer | Test Equipment Pattern Memory |
Use Scenario: MRI subsystem uses one processor for raw ADC data ingestion and another for real-time image reconstruction. IC Role / Device Role / Timing Role: 7009L20PFI provides concurrent 128K × 8 buffer access: left port streams 8-bit pixel data at >40 MB/s; right port feeds reconstruction engine with aligned frames. Use Value: 20 ns tAA and full asynchronous operation prevent pipeline stalls - sustaining 50 MHz sustained bandwidth across both ports simultaneously. |
Use Scenario: Automated test equipment stores stimulus/response patterns for semiconductor validation, accessed by pattern generator and comparator cores. IC Role / Device Role / Timing Role: 7009L20PFI functions as a high-reliability, radiation-tolerant (industrial temp) dual-port pattern store with hardware semaphore coordination of test sequence handoffs. Use Value: Enables seamless pattern switching with <5 ns semaphore contention window (tSPS), reducing test cycle time by eliminating software synchronization delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1370D-200BAXI | 128K × 18, 200 MHz QDR interface, 1.8 V core / 3.3 V I/O, 165-pin FBGA | Targets high-bandwidth networking buffers; lacks native semaphore/BUSY logic; requires external arbitration | Choose for wider data bus and DDR throughput; avoid if hardware semaphore or 5 V compatibility is required. |
| AS7C3128-20JIN | 128K × 8, 20 ns, 3.3 V only, 100-pin TQFP, no dual-port arbitration logic | Single-port SRAM; no INT/BUSY/SEM pins; requires external logic for multi-CPU sharing | Choose for cost-sensitive, non-concurrent-access designs; not suitable as drop-in replacement for 7009L20PFI's dual-port features. |
Compared with CY7C1370D-200BAXI and AS7C3128-20JIN, the 7009L20PFI uniquely delivers integrated hardware arbitration (BUSY/SEM/INT), 5 V TTL compatibility, and true dual-port concurrency in a pin-compatible 100-pin TQFP - making it irreplaceable in legacy industrial and avionics systems where software-light, deterministic inter-processor communication is mandatory.
Availability
7009L20PFI is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data buffers, medical imaging pipelines, and automated test equipment requiring stable component supply across extended product lifecycles.
Supply support for 7009L20PFI 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.
The 7009L20PFI belongs to IDT's legacy high-speed dual-port SRAM family, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where hardware arbitration eliminates software synchronization bottlenecks.
FAQ
What is the maximum operating temperature range certified for the 7009L20PFI?
The 7009L20PFI is rated for industrial temperature operation from –40°C to +85°C, as explicitly specified in IDT's datasheet (Table 3, "Recommended DC Operating Conditions"). This rating applies to the 7009L20 speed grade and is validated across all electrical parameters including tAA = 20 ns max and ISB3 = 0.2 mA typ standby current.
Does the 7009L20PFI support true simultaneous read operations from both ports to the same memory address?
Yes, the 7009L20PFI implements true dual-port memory cells that permit simultaneous reads from identical addresses on left and right ports without conflict or timing penalty. This capability is fundamental to its architecture and is confirmed in the Functional Description section and Truth Table II of the IDT 7009L datasheet.
How does the M/S pin affect BUSY pin functionality on the 7009L20PFI?
When M/S = VIH, the 7009L20PFI operates as a master: BUSYL and BUSYR are push-pull outputs asserting during port contention (tBAA ≤ 20 ns). When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that internally inhibit writes when driven low - enabling scalable width-expansion with one master distributing BUSY signals.
What are the exact memory addresses used for interrupt flag generation in the 7009L20PFI?
The 7009L20PFI uses fixed addresses for interrupt triggering: writing to 1FFFEh (hex) on the right port asserts INTL, while writing to 1FFFFh (hex) on the left port asserts INTR. These addresses are defined in Truth Table IV and Functional Description sections of the IDT datasheet, and are hardwired - not programmable.
Is external pull-up resistance required on the INTL, INTR, BUSYL, or BUSYR pins of the 7009L20PFI?
No. The 7009L20PFI's INTL, INTR, BUSYL, and BUSYR pins are push-pull (totem-pole) outputs per datasheet Notes 1 and 2, and Figure 2. They drive actively high/low without requiring external pull-up resistors - a key design advantage over open-drain alternatives.
7009L20PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7009L20PFI FAQ
1.How can I place an order for 7009L20PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7009L20PFI 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 7009L20PFI reliable?
The price and inventory of 7009L20PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7009L20PFI is usually 5 days.
3.What payment methods are accepted for 7009L20PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7009L20PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7009L20PFI?
7009L20PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7009L20PFI 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 7009L20PFI?
For technical support, including 7009L20PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7009L20PFI requirements.
6.How does Aetrix verify that 7009L20PFI is sourced from the original manufacturer or authorized distributors?
All 7009L20PFI 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 7009L20PFI meets industry standards.
7.What is the process for return or replacement of 7009L20PFI?
All 7009L20PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7009L20PFI, 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 7009L20PFI part is unused and in its original packaging.
Return procedure for 7009L20PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7009L20PFI Tags
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