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Renesas 7008L20JGI8
- Part No.:
- 7008L20JGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7008L20JGI8.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,986
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Product details
Overview
IDT7008L20JGI8 from IDT (Integrated Device Technology) is a high-speed 64K × 8 true dual-ported static RAM with independent left/right ports, 20 ns maximum access time, TTL-compatible 5V ±10% operation, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the IDT7008L20JGI8 datasheet, IDT7008L20JGI8 pinout, IDT7008L20JGI8 application, or IDT7008L20JGI8 equivalent, key selection considerations include BUSY-flag arbitration timing (tBDD ≤ 20 ns), low standby power (1 mW typ.), M/S-selectable master/slave cascading, and 100-pin TQFP packaging with verified pin mapping for industrial temperature (–40°C to +85°C) operation.
Technical Context
The IDT7008L20JGI8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port-enabling simultaneous read/write access to any memory location. Its on-chip arbitration logic resolves contention via push-pull BUSY flags and supports both address-match and CE-controlled arbitration modes.
It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible via SEM pin control, and interrupt signaling using FFFEH/FFFFH mailbox addresses. The device uses CMOS process technology and supports automatic power-down via CE0/CE1 enables, achieving 1 mW typical standby current in L-version configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit total); supports independent concurrent access from left and right ports |
| Access Time (max) | 20 ns - guarantees deterministic latency for real-time inter-processor data exchange |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL logic families without level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Standby Current (typ) | 1 mW - enables ultra-low-power hold mode during processor idle cycles |
| Package | 100-pin TQFP (PNG100) - surface-mount compatible with automated PCB assembly and thermal management |
| BUSY Arbitration | Push-pull output (not open-drain); tBDD ≤ 20 ns ensures rapid port-to-port write conflict resolution |
Pinout & Package
Package: 100-pin Thin Quad Flatpack (TQFP), body size ≈ 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant green variant available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L | Left Port Address Inputs | 16-bit address bus for left-side memory access; fully independent of right port |
| A0R–A15R | Right Port Address Inputs | 16-bit address bus for right-side memory access; no shared address lines |
| I/O0L–I/O7L | Left Port Data I/O | Bi-directional 8-bit data path; tri-stated when OEL = VIH or CE0L/CE1L = VIH |
| I/O0R–I/O7R | Right Port Data I/O | Bi-directional 8-bit data path; isolated from left port I/O for true concurrency |
| R/WL / R/WR | Port-Specific Write Enable | Active-low control for write operations; must be LOW during CE-active window for valid writes |
| OEL / OER | Port-Specific Output Enable | Controls tri-state of respective I/O bus; independent of R/W state for flexible bus sharing |
| CE0L, CE1L / CE0R, CE1R | Dual Chip Enables per Port | Enable depth expansion without external logic; CE0+CE1 decode selects active port mode |
| SEML / SEMR | Semaphore Enable | High = RAM access; Low = semaphore register access (A0–A2 select flag 0–7) |
| INTL / INTR | Interrupt Flags | Open-collector compatible outputs; asserted when opposite port writes to FFFEH/FFFFH |
| BUSYL / BUSYR | Arbitration Busy Flags | Push-pull outputs (Master) or inputs (Slave); inhibit conflicting writes during contention |
| M/S | Master/Slave Select | VIH = BUSY outputs enabled (Master); VIL = BUSY inputs accepted (Slave) for cascaded systems |
| VCC / GND | Power & Ground | All VCC pins must be connected; multiple GND pins provide low-inductance return paths |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous reads from same address on both ports - eliminates read collision risk in lock-free buffer designs |
| Hardware Semaphore Support | Eight dedicated flags (A0–A2 addressable) enable atomic resource locking between processors without software overhead |
| Master/Slave Cascading | M/S pin configures device as Master (BUSY output) or Slave (BUSY input), enabling seamless 16-bit+ bus expansion |
| Low-Power Standby Mode | 1 mW typical ISB3 current - reduces system power budget during idle periods in battery-backed or energy-constrained systems |
| Industrial Temperature Range | –40°C to +85°C operation - validated for deployment in motor drives, PLCs, and outdoor telecom infrastructure |
| TTL-Compatible Interface | No level shifters required for 5V microcontrollers, DSPs, or FPGAs - simplifies board design and signal integrity validation |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Buffering |
|---|---|
Use Scenario: Two independent CPUs (e.g., ARM Cortex-M7 and RISC-V core) share sensor data and control commands via mailbox protocol. IC Role / Device Role / Timing Role: IDT7008L20JGI8 serves as a hardware-synchronized shared memory with BUSY arbitration and INT signaling to prevent race conditions. Use Value: Eliminates software mutex polling; 20 ns access + tBDD ≤ 20 ns ensures sub-40 ns worst-case contention resolution for deterministic response. |
Use Scenario: A DSP writes processed audio frames into memory while an FPGA reads them for real-time DAC streaming. IC Role / Device Role / Timing Role: IDT7008L20JGI8 acts as a ping-pong buffer with independent clock domains, using semaphore flags to coordinate frame ownership. Use Value: Full 64K × 8 capacity supports >100 ms of CD-quality audio; dual-port concurrency prevents pipeline stalls during burst transfers. |
| Industrial PLC Memory Expansion | Avionics Data Acquisition Interface |
Use Scenario: Programmable Logic Controller expands local memory to store I/O scan buffers and ladder logic variables across multiple modules. IC Role / Device Role / Timing Role: IDT7008L20JGI8 operates as a MASTER/SLAVE-cascaded block in a 16-bit data path, managed by a dedicated controller ASIC. Use Value: Dual chip enables (CE0/CE1) allow depth expansion without glue logic; industrial temp rating ensures reliability in factory-floor cabinets. |
Use Scenario: Flight data recorder interfaces with multiple sensor ADCs and a safety-critical microcontroller over ARINC-429 or MIL-STD-1553 buses. IC Role / Device Role / Timing Role: IDT7008L20JGI8 provides fault-tolerant shared memory for timestamped telemetry, with BUSY arbitration preventing corrupted writes during bus retries. Use Value: Push-pull BUSY outputs meet avionics EMI requirements; 100-pin TQFP supports conformal coating and high-reliability solder joints. |
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, 100-pin TQFP, 3.3V core (5V tolerant I/O) | Wider data bus; requires voltage translation for pure 5V systems; higher active power (1.2 W typ.) | Choose for 16-bit bus architectures needing single-device word-width support. |
| IS61LV6416-20TQLI | 20 ns access, 64K × 16, 44-pin TSOP-II, 3.3V only, no BUSY/semaphore logic | No hardware arbitration; external logic needed for multi-processor sync; smaller footprint but no industrial temp option | Choose for cost-sensitive 3.3V systems where software-managed coherency suffices. |
Compared with CY7C028V-20AXC and IS61LV6416-20TQLI, the IDT7008L20JGI8 uniquely delivers 5V-native operation with integrated arbitration and semaphore logic in a 100-pin TQFP - eliminating external glue logic and reducing BOM count for industrial real-time systems.
Availability
IDT7008L20JGI8 is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and real-time inter-processor communication requiring stable component supply across extended product lifecycles.
Supply support for IDT7008L20JGI8 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 sensor signal processing ICs, now part of Renesas Electronics.
The IDT7008L20JGI8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in industrial control, test equipment, and military/aerospace systems.
FAQ
What is the operating temperature range specified for the IDT7008L20JGI8?
The IDT7008L20JGI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "Recommended DC Operating Conditions" table and applies to all speed grades including the 20 ns version. It is not rated for commercial-only (0°C to +70°C) use.
Does the IDT7008L20JGI8 support true simultaneous read operations from both ports to the same memory address?
Yes, the IDT7008L20JGI8 uses true dual-ported memory cells that permit concurrent reads from identical addresses on the left and right ports without contention or timing penalty - a core feature explicitly stated in the "Features" section and verified in the functional description.
How does the BUSY arbitration logic behave when the IDT7008L20JGI8 is configured as a Slave (M/S = VIL)?
When M/S = VIL, BUSYL and BUSYR become inputs. A LOW on either BUSY pin internally inhibits writes to the corresponding port, regardless of R/W or CE state. This behavior is documented in Note 1 of the Functional Description and Truth Table V, ensuring safe cascaded operation.
What package type is used for the IDT7008L20JGI8, and is pin compatibility guaranteed across speed grades?
The IDT7008L20JGI8 uses a 100-pin TQFP (PNG100) package. Pinout is identical across all IDT7008 speed grades (X15/X20/X25/X35/X55) and variants (S/L), as confirmed by consistent pin configuration diagrams and the "Pin Names" table in the datasheet.
Can the IDT7008L20JGI8 be used without enabling the semaphore or interrupt functions?
Yes - the IDT7008L20JGI8 operates as a standard dual-port SRAM when SEM is held HIGH and FFFEH/FFFFH addresses are unused. The semaphore and interrupt features are optional; their associated pins (SEML/SEMR, INTL/INTR) remain functional but inactive unless explicitly configured.
7008L20JGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7008L20JGI8 FAQ
1.How can I place an order for 7008L20JGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7008L20JGI8 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 7008L20JGI8 reliable?
The price and inventory of 7008L20JGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7008L20JGI8 is usually 5 days.
3.What payment methods are accepted for 7008L20JGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7008L20JGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7008L20JGI8?
7008L20JGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7008L20JGI8 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 7008L20JGI8?
For technical support, including 7008L20JGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7008L20JGI8 requirements.
6.How does Aetrix verify that 7008L20JGI8 is sourced from the original manufacturer or authorized distributors?
All 7008L20JGI8 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 7008L20JGI8 meets industry standards.
7.What is the process for return or replacement of 7008L20JGI8?
All 7008L20JGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7008L20JGI8, 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 7008L20JGI8 part is unused and in its original packaging.
Return procedure for 7008L20JGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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