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Renesas 7009L20PFG8
- Part No.:
- 7009L20PFG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7009L20PFG8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
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Product details
Overview
7009L20PFG8 from IDT is a high-speed 128K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial/commercial), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/INT/BUSY arbitration logic. It enables simultaneous read/write to same memory location in real-time interprocessor communication systems.
For engineers reviewing the 7009L20PFG8 datasheet, 7009L20PFG8 pinout, 7009L20PFG8 application, or 7009L20PFG8 equivalent, key selection criteria include dual-port contention handling via BUSY flag timing (tBDD ≤17 ns), semaphore update pulse width (tSOP =10 ns), interrupt set/reset latency (tINS/tINR ≤20 ns), and full CMOS standby current (ISB3 ≤6.0 mA).
Technical Context
The 7009L20PFG8 implements fully asynchronous dual-port operation with separate address buses (A0L–A16L / A0R–A16R), control lines (CE0L/CE1L, R/WL, OEL / CE0R/CE1R, R/WR, OER), and bidirectional I/Os (I/O0L–I/O7L / I/O0R–I/O7R). Its on-chip arbitration logic resolves port-to-port conflicts using push-pull BUSY outputs (BUSYL/BUSYR) and M/S-selectable master/slave mode.
It integrates eight dedicated semaphore latches (addressed by A0–A2) accessible via SEM=VIL and CE=VIH, supporting token-passing resource allocation without software wait states. Interrupt flags (INTL/INTR) are triggered by writes to fixed mailbox addresses (1FFFEh/1FFFFh), with hardware-set/clear semantics verified in Truth Table IV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8 bits (1024K-bit total); supports depth expansion via dual CE enables and width expansion via Master/Slave cascading |
| Access Time (tAA) | 20 ns max (industrial & commercial); guarantees deterministic read latency under worst-case voltage/temperature |
| Supply Voltage | 4.5 V to 5.5 V; TTL-compatible single 5V rail eliminates level-shifting in legacy microcontroller bus interfaces |
| Standby Current (ISB3) | ≤6.0 mA (industrial); full CMOS power-down mode achieved when both ports' CE inputs exceed VCC−0.2V or <0.2V |
| BUSY Timing (tBDD) | ≤17 ns (M/S=VIH); defines maximum delay from BUSY assertion to valid data on contending read port |
| Semaphore Pulse (tSOP) | 10 ns min; ensures reliable latch update during semaphore write cycles with CE=VIH/SEM=VIL |
| Interrupt Latency | tINS/tINR ≤20 ns; bounds time from mailbox write to INTL/INTR flag assertion or clearance |
Pinout & Package
7009L20PFG8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 14 mm × 14 mm body and 1.4 mm height. All VCC pins require decoupling; all GND pins must be connected to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Chip Enable (Left/Right) | Dual enables per port allow independent power gating; CE1 enables depth expansion without external logic |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low signal determines direction of data transfer on respective I/O bus |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O drivers independently; required for bus sharing in multi-device systems |
| A0L–A16L / A0R–A16R | Address Inputs (Left/Right) | 17-bit addressing per port supports full 128K × 8 memory map; no shared address lines |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left/Right) | Bidirectional 8-bit data paths; support simultaneous reads of identical locations without conflict |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore latch access when CE=VIH; isolates semaphore logic from main RAM array |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain compatible push-pull outputs; assert on mailbox writes to 1FFFEh/1FFFFh |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Push-pull outputs (Master) or inputs (Slave); resolve port-to-port contention at hardware level |
| M/S | Master/Slave Select | VIH configures BUSY as output (arbitration master); VIL configures BUSY as input (slave write-inhibit) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Independent control/address/I/O per port enables concurrent access to any memory location without cycle penalty |
| Hardware Semaphore Logic | Eight dedicated latches (A0–A2) provide lock-free resource arbitration; eliminates software polling overhead |
| Configurable BUSY Arbitration | M/S pin selects master (push-pull BUSY output) or slave (BUSY input) mode for scalable multi-RAM arrays |
| Mailbox Interrupt System | Fixed-address interrupts (1FFFEh/1FFFFh) enable deterministic interprocessor signaling with ≤20 ns latency |
| Low-Power Standby Modes | ISB3 ≤6.0 mA (full CMOS shutdown) and ISB2 ≤235 mA (one active port) optimize power in burst-mode systems |
Applications
| Real-Time Interprocessor Communication | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: Two microcontrollers exchange sensor data and control commands via shared memory without bus contention. IC Role / Device Role / Timing Role: 7009L20PFG8 serves as synchronous message-passing buffer with hardware semaphore coordination. Use Value: Eliminates software handshaking delays; BUSY arbitration ensures deterministic response to simultaneous access attempts. |
Use Scenario: Programmable logic controller uses dual-port RAM to isolate I/O scan engine from user program execution thread. IC Role / Device Role / Timing Role: 7009L20PFG8 provides atomic read/write separation between real-time I/O and non-real-time logic processing. Use Value: Prevents data corruption during concurrent access; interrupt flags trigger task switching without polling overhead. |
| Avionics Data Acquisition Hub | Medical Imaging Frame Buffer |
Use Scenario: Flight computer and health monitoring unit share telemetry buffers in DO-254-certifiable hardware. IC Role / Device Role / Timing Role: 7009L20PFG8 acts as safety-critical shared memory with hardware-enforced access isolation. Use Value: BUSY-driven write inhibition meets deterministic timing requirements; industrial temp range (−40°C to +85°C) ensures reliability. |
Use Scenario: MRI subsystem transfers raw image frames between acquisition FPGA and reconstruction processor. IC Role / Device Role / Timing Role: 7009L20PFG8 functions as zero-latency frame buffer with simultaneous read/write capability. Use Value: 20 ns access time sustains >50 MB/s throughput; semaphore logic coordinates DMA transfers without CPU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-20AXC | 20 ns access, 128K × 16 organization, 3.3V core (5V tolerant I/O), different pinout (100-pin PQFP) | Requires data bus width adaptation; lacks integrated semaphore logic; uses separate BUSY/INT pins | Select when 16-bit data path or lower-voltage operation is required; verify PCB layout compatibility. |
| AS7C3128A-20JC | 20 ns access, 128K × 8, 3.3V supply only, no hardware semaphore/BUSY logic, 100-pin TQFP | No arbitration support; requires external logic for interprocessor coordination; limited to commercial temp range (0°C to +70°C) | Choose for cost-sensitive non-arbitrated dual-port use cases where temperature range and hardware semaphores are unnecessary. |
Compared with CY7C028V-20AXC and AS7C3128A-20JC, the 7009L20PFG8 uniquely integrates semaphore latches, configurable BUSY arbitration, and mailbox interrupts in a single 5V device-enabling deterministic interprocessor communication without external glue logic or firmware overhead.
Availability
7009L20PFG8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, industrial PLC memory buffering, avionics data acquisition, and medical imaging frame buffering requiring stable component supply across extended temperature ranges.
Supply support for 7009L20PFG8 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 timing, memory interface, RF, and high-performance silicon solutions for communications, computing, and industrial markets.
The 7009L20PFG8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems requiring hardware arbitration and low-latency shared memory.
FAQ
What is the operating temperature range supported by the 7009L20PFG8?
The 7009L20PFG8 is rated for industrial and commercial temperature ranges: −40°C to +85°C and 0°C to +70°C respectively. This dual-range qualification makes it suitable for deployment in harsh industrial environments as well as standard office-grade equipment without derating.
How does the BUSY arbitration logic function in master versus slave configuration for the 7009L20PFG8?
In master mode (M/S = VIH), BUSYL and BUSYR are push-pull outputs that assert when port-to-port address contention occurs, blocking writes on the contending side. In slave mode (M/S = VIL), BUSYL and BUSYR become inputs that externally inhibit writes-enabling scalable arrays where one master drives BUSY signals to multiple slaves.
Can the 7009L20PFG8 perform simultaneous reads from both ports to the same memory address?
Yes, the 7009L20PFG8 uses true dual-ported memory cells that allow concurrent reads from identical addresses on left and right ports without conflict, timing penalty, or data corruption-verified in the Functional Block Diagram and Truth Table II.
What are the electrical characteristics of the interrupt and semaphore pins on the 7009L20PFG8?
INTL/INTR are push-pull outputs with VOH ≥2.4 V (IOH = −4 mA) and VOL ≤0.4 V (IOL = 4 mA). SEMR/SEML are CMOS inputs with VIH ≥2.2 V and VIL ≤0.8 V. All operate within the 4.5–5.5 V supply range and support direct interfacing with TTL/CMOS logic families.
How is the 7009L20PFG8 packaged, and what are the mechanical constraints?
The 7009L20PFG8 uses a 100-pin TQFP package measuring 14 mm × 14 mm × 1.4 mm. Pin 1 is located at the top-left corner (notch-marked); all VCC pins require local 0.1 µF ceramic decoupling, and all GND pins must connect to a low-impedance ground plane per datasheet Note 2.
7009L20PFG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7009L20PFG8 FAQ
1.How can I place an order for 7009L20PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7009L20PFG8 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 7009L20PFG8 reliable?
The price and inventory of 7009L20PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7009L20PFG8 is usually 5 days.
3.What payment methods are accepted for 7009L20PFG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7009L20PFG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7009L20PFG8?
7009L20PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7009L20PFG8 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 7009L20PFG8?
For technical support, including 7009L20PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7009L20PFG8 requirements.
6.How does Aetrix verify that 7009L20PFG8 is sourced from the original manufacturer or authorized distributors?
All 7009L20PFG8 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 7009L20PFG8 meets industry standards.
7.What is the process for return or replacement of 7009L20PFG8?
All 7009L20PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 7009L20PFG8, 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 7009L20PFG8 part is unused and in its original packaging.
Return procedure for 7009L20PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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