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Renesas 70V08L20PFGI8
- Part No.:
- 70V08L20PFGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V08L20PFGI8.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
70V08L20PFGI8 from IDT (now Renesas) is a high-speed, 3.3V, 64K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial grade), LVTTL-compatible I/O, and on-chip semaphore/interrupt/arbitration logic. It enables simultaneous asynchronous read/write to the same memory location in real-time inter-processor communication systems.
For engineers reviewing the 70V08L20PFGI8 datasheet, 70V08L20PFGI8 pinout, 70V08L20PFGI8 application, or 70V08L20PFGI8 equivalent, key selection considerations include port-to-port contention handling via BUSY flag, master/slave configuration using M/S pin, integrated semaphore register addressing (A0–A2), and industrial temperature support (–40°C to +85°C) in 100-pin TQFP.
Technical Context
The 70V08L20PFGI8 implements fully asynchronous dual-port architecture with separate address, control, and data buses per port. Its on-chip arbitration logic resolves simultaneous access conflicts using push-pull BUSY flags and priority setup timing (tAPS = 5 ns), while semaphore signaling operates via dedicated SEM pins and I/O0–I/O7 with A0–A2 addressing eight flags.
It supports three operational modes per port: RAM access (CE = VIL, SEM = VIH), semaphore access (CE = VIH, SEM = VIL), and interrupt generation (INTL/INTR asserted on writes to FFFE/FFFF). Power management includes four standby current states (ISB1–ISB4), with full CMOS standby drawing only 0.2 mA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time | 20 ns max (industrial grade, –40°C to +85°C), enabling 50 MHz system synchronization without wait states |
| Supply Voltage | 3.3 V ± 0.3 V - single LVTTL-compatible supply; all VDD pins require connection to 3.3 V rail |
| Standby Current | 0.2 mA typical (ISB3, full CMOS standby), reducing power in idle multi-processor subsystems |
| Operating Temperature | –40°C to +85°C (industrial grade), validated for embedded control, avionics, and industrial automation |
| Package | 100-pin TQFP (14 mm × 14 mm × 1.4 mm body), RoHS-compliant and green-part qualified |
| Port Arbitration | Hardware-based BUSY flag with tBDD ≤ 35 ns (M/S = VIH), ensuring deterministic resolution of simultaneous address-matched writes |
Pinout & Package
70V08L20PFGI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad (not electrically connected). Pin 1 is top-left corner (marked dot); NC pins are unconnected and must remain floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Chip Enable (Left/Right) | Dual enables per port allow independent depth expansion without external logic; TTL- or CMOS-level active-low selection |
| R/WL, R/WR | Read/Write Control | Active-low signal determines direction: LOW = write, HIGH = read; must be HIGH during address transitions |
| OEL, OER | Output Enable | Active-low control of I/O drivers; enables tristate output during reads or disables outputs during writes |
| A0L–A15L / A0R–A15R | Address Inputs | 16-bit address bus per port; A0–A2 used for semaphore flag addressing when SEM = VIL |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O | Bidirectional 8-bit data bus per port; I/O0 carries semaphore write data; all I/Os read semaphore flags |
| SEML, SEMR | Semaphore Enable | Active-low enable for semaphore register access (CE = VIH required); enables A0–A2 decoding of 8 semaphore flags |
| INTL, INTR | Interrupt Flag | Open-drain? No - push-pull outputs; INTL asserts on right-port write to FFFE; INTR on left-port write to FFFF |
| BUSYL, BUSYR | Busy Flag | Push-pull outputs (not tri-state); BUSYL = output when M/S = VIH (master), input when M/S = VIL (slave); controls write inhibition |
| M/S | Master/Slave Select | VIH configures device as master (BUSY outputs); VIL configures as slave (BUSY inputs); determines arbitration role |
| VDD, VSS | Power/Ground | Eight VDD and twelve VSS pins - all must be connected; decoupling required per pin group per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to identical addresses enabled by dedicated cell design - eliminates software locks in IPC |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2 and SEM pin - avoids external logic or polling overhead in resource sharing |
| Hardware Port Arbitration | BUSY flag with 5 ns arbitration priority setup (tAPS) and ≤35 ns disable-to-valid-data delay (tBDD) ensures deterministic conflict resolution |
| Configurable Master/Slave Mode | M/S pin selects master (BUSY output) or slave (BUSY input) behavior - enables flexible cascading in multi-device memory systems |
| Four-Mode Power Management | ISB1–ISB4 standby states support dynamic power scaling: full CMOS standby draws only 0.2 mA typical at 3.3 V |
| Industrial Temperature Support | Rated for –40°C to +85°C operation with verified 20 ns access time - suitable for under-hood, factory-floor, and aerospace applications |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Subsystem |
|---|---|
Use Scenario: Two microcontrollers exchange sensor data and control commands via shared memory without OS intervention. IC Role / Device Role / Timing Role: 70V08L20PFGI8 serves as synchronous dual-port mailbox with hardware semaphore coordination and BUSY-flag arbitration. Use Value: Eliminates software mutex overhead; 20 ns access enables sub-50 ns inter-core handshaking; M/S pin configures master/slave roles in asymmetric systems. |
Use Scenario: DSP core writes processed audio frames to shared buffer while ARM host reads and streams over USB. IC Role / Device Role / Timing Role: 70V08L20PFGI8 provides zero-wait-state dual-port buffer with independent clock domains and automatic power-down during idle cycles. Use Value: Prevents FIFO overflow under burst traffic; ISB3 standby mode cuts leakage to 0.2 mA; semaphore flags coordinate frame ownership without CPU polling. |
| Avionics Flight Control Interface | Industrial PLC Redundancy Module |
Use Scenario: Safety-critical flight computer and backup controller maintain synchronized state via mirrored memory regions. IC Role / Device Role / Timing Role: 70V08L20PFGI8 acts as fault-tolerant dual-port RAM with hardware-enforced write collision avoidance via BUSY assertion. Use Value: tBDD ≤ 35 ns guarantees deterministic recovery from simultaneous writes; industrial temp rating supports extended environmental qualification. |
Use Scenario: Primary and secondary PLC CPUs share I/O status and diagnostic logs using atomic semaphore-protected registers. IC Role / Device Role / Timing Role: 70V08L20PFGI8 delivers deterministic interlock via eight hardware semaphores (A0–A2) and interrupt-driven event notification (INTL/INTR). Use Value: Reduces firmware complexity by offloading mutual exclusion to silicon; 100-pin TQFP supports high-density industrial PCB layouts with robust thermal dissipation. |
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, 64K × 16 organization, 3.3 V, 100-pin TQFP - wider data bus but no native semaphore logic | Requires external logic for semaphore emulation; better suited for wide-bus video/frame buffers than IPC coordination | Select when 16-bit data path is mandatory and arbitration is handled in firmware or FPGA |
| AS7C364B-20TIN | 20 ns access, 64K × 8, 3.3 V, 100-pin TQFP - lacks BUSY/SEM/INT pins and hardware arbitration | No built-in port conflict resolution; relies on software protocols or external arbiter ICs | Choose for cost-sensitive non-real-time applications where deterministic arbitration is not required |
Compared with CY7C028V-20AXC and AS7C364B-20TIN, the 70V08L20PFGI8 uniquely integrates semaphore registers, push-pull BUSY signaling, and master/slave configuration - reducing BOM count and firmware complexity in tightly coupled multi-processor systems.
Availability
70V08L20PFGI8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing subsystems, and industrial redundancy modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 70V08L20PFGI8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V08L20PFGI8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in safety-critical and real-time embedded systems.
FAQ
What is the maximum operating temperature range certified for the 70V08L20PFGI8?
The 70V08L20PFGI8 is rated for industrial temperature operation from –40°C to +85°C, with all AC/DC specifications-including 20 ns access time-guaranteed across this full range. This certification supports deployment in engine control units, factory automation controllers, and outdoor telecom infrastructure where ambient thermal stress is significant.
How does the M/S pin affect BUSY pin functionality on the 70V08L20PFGI8?
When M/S = VIH, the 70V08L20PFGI8 operates as a master: BUSYL and BUSYR become push-pull outputs that assert during port contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that inhibit local writes when driven low by a master device. This pin configures the device's arbitration role in multi-chip systems.
Can the 70V08L20PFGI8 perform simultaneous read and write operations on the same memory address?
Yes - the 70V08L20PFGI8 uses true dual-ported SRAM cells that permit simultaneous read and write to identical addresses. However, if both ports attempt a write to the same location, hardware arbitration via BUSY flags ensures deterministic resolution, preventing data corruption. The tBDD parameter (≤35 ns) defines the maximum delay before valid data appears after BUSY deassertion.
What are the voltage thresholds for VIH and VIL on control inputs of the 70V08L20PFGI8?
For the 70V08L20PFGI8, VIH is guaranteed ≥2.0 V (minimum) and ≤VDD + 0.3 V (maximum), while VIL is guaranteed ≤0.8 V (maximum) and ≥–0.3 V (minimum). These LVTTL-compatible thresholds ensure interoperability with 3.3 V microcontrollers and FPGAs without level-shifting circuitry.
How many semaphore flags does the 70V08L20PFGI8 support, and how are they accessed?
The 70V08L20PFGI8 supports eight hardware semaphore flags, addressed using A0–A2 when SEM = VIL and CE = VIH. Semaphore write occurs via I/O0; all eight flags are readable simultaneously on I/O0–I/O7. This dedicated register space eliminates software polling and enables atomic resource locking between processors.
70V08L20PFGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V08L20PFGI8 FAQ
1.How can I place an order for 70V08L20PFGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V08L20PFGI8 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 70V08L20PFGI8 reliable?
The price and inventory of 70V08L20PFGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V08L20PFGI8 is usually 5 days.
3.What payment methods are accepted for 70V08L20PFGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V08L20PFGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V08L20PFGI8?
70V08L20PFGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V08L20PFGI8 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 70V08L20PFGI8?
For technical support, including 70V08L20PFGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V08L20PFGI8 requirements.
6.How does Aetrix verify that 70V08L20PFGI8 is sourced from the original manufacturer or authorized distributors?
All 70V08L20PFGI8 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 70V08L20PFGI8 meets industry standards.
7.What is the process for return or replacement of 70V08L20PFGI8?
All 70V08L20PFGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V08L20PFGI8, 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 70V08L20PFGI8 part is unused and in its original packaging.
Return procedure for 70V08L20PFGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V08L20PFGI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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