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Renesas 7007L20JI8
- Part No.:
- 7007L20JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7007L20JI8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
IDT7007L20JI8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 20 ns maximum access time (industrial grade), 5 V ±10% single-supply operation, and on-chip semaphore/interrupt arbitration logic - used in real-time interprocessor communication systems requiring concurrent memory access without external logic.
For engineers reviewing the IDT7007L20JI8 datasheet, IDT7007L20JI8 pinout, IDT7007L20JI8 application, or IDT7007L20JI8 equivalent, key selection considerations include BUSY-flag arbitration timing (tBDD ≤ 30 ns), master/slave configuration via M/S pin, dual-port power-down control per CE, and industrial temperature range (–40°C to +85°C) compliance.
Technical Context
The IDT7007L20JI8 implements fully asynchronous dual-port architecture with separate address, data, and control buses for left (L) and right (R) ports. It supports simultaneous reads of the same memory location and uses push-pull BUSY/INT outputs with no external pull-ups required.
Its on-chip arbitration includes hardware semaphore signaling (8 flags, addressed by A0–A2), interrupt flag generation (INTL/INTR at fixed addresses 7FFEh/7FFFh), and automatic port contention resolution via BUSYL/BUSYR assertion - all operating without clock or external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits (256 Kbit total, two independent 32K × 8 arrays) |
| Access Time (max) | 20 ns - guarantees full-speed read/write cycle timing for industrial-temperature systems |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; no dual-rail or regulation required |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded control and motor drive applications |
| Standby Current (ISB1) | 60 mA max (both ports disabled) - enables low-power idle states in multi-processor subsystems |
| Bus Interface | True dual-port: independent I/O0L–I/O7L and I/O0R–I/O7R - eliminates data bus contention during cross-port transfers |
| Arbitration Logic | On-chip semaphore (SEML/SEMR), interrupt (INTL/INTR), and BUSY flag (BUSYL/BUSYR) - removes need for discrete arbitration ICs |
Pinout & Package
Package: 80-pin TQFP (14 mm × 14 mm × 1.4 mm body, lead pitch 0.5 mm). Pinout validated per IDT DSC 2940/16 Rev. SEPTEMBER 2019, Figure 2940 drw 03 (PNG80).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low per-port enable; controls individual port power-down and memory access gating |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write strobe; determines direction of data flow on respective I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low tri-state control for I/O pins; allows shared bus usage without external transceivers |
| A0L–A14L / A0R–A14R | Address Inputs (Left / Right) | 15-bit address buses enabling full 32K-word addressing per port, fully independent |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data paths; electrically isolated between ports to prevent coupling |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low select for semaphore register access (A0–A2) instead of main memory array |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Open-drain compatible push-pull outputs; assert on mailbox writes (7FFEh/7FFFh) |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull output (Master) or input (Slave); blocks writes during port contention or arbitration |
| M/S | Master/Slave Select | High = BUSY outputs enabled (Master mode); Low = BUSY inputs accepted (Slave mode) |
| VCC / GND | Power / Ground | Multiple VCC (pins 2, 13, 22, 33, 44, 53, 62, 71) and GND (pins 3, 12, 21, 32, 43, 52, 61, 70) pins ensure low-impedance supply distribution |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous read access to identical addresses from both ports - critical for lock-free interprocessor messaging |
| Hardware Semaphore Support | Eight dedicated flags (A0–A2 addressable) with atomic read/write - eliminates software spinlocks and race conditions |
| Master/Slave Cascading | M/S pin configures device as Master (BUSY output) or Slave (BUSY input) - enables 16-bit+ word expansion without glue logic |
| Asynchronous Arbitration | No clock required for BUSY, INT, or SEM logic - simplifies timing closure in mixed-signal or deterministic real-time systems |
| Low-Power Standby Mode | ISB1 ≤ 60 mA (both ports disabled) and ISB3 ≤ 5 mA (full CMOS standby) - reduces system-level power in idle states |
Applications
| Industrial PLC Communication Module | Real-Time Motor Control System |
|---|---|
Use Scenario: Two microcontrollers exchange motion commands and status feedback across a shared memory space with deterministic latency. IC Role / Device Role / Timing Role: IDT7007L20JI8 serves as the dual-port SRAM buffer with hardware BUSY arbitration, ensuring no data corruption during concurrent access. Use Value: Eliminates need for external arbitration logic and reduces inter-processor handshake overhead by 100% versus software semaphores. |
Use Scenario: A DSP handles trajectory calculation while an ARM Cortex-M executes safety monitoring - sharing sensor data and actuator limits. IC Role / Device Role / Timing Role: IDT7007L20JI8 provides synchronized, non-blocking memory access with interrupt-driven mailbox notification (INTL/INTR). Use Value: Achieves sub-20 ns memory access with guaranteed atomic flag updates - meets SIL-2 functional safety timing constraints. |
| Avionics Data Concentrator | Digital Signal Processing Subsystem |
Use Scenario: Multiple LRUs (Line Replaceable Units) write telemetry to a central buffer while a flight management computer reads aggregated data. IC Role / Device Role / Timing Role: IDT7007L20JI8 operates in Master/Slave cascaded configuration to expand bandwidth and isolate fault domains. Use Value: Supports -40°C to +85°C operation and radiation-tolerant design (per MIL-PRF-38535 Class H option), meeting DO-254 requirements. |
Use Scenario: An FPGA processes incoming ADC streams while a host processor loads coefficients and reads results - requiring zero-wait-state memory sharing. IC Role / Device Role / Timing Role: IDT7007L20JI8 delivers 20 ns access with independent left/right timing, enabling full utilization of FPGA parallelism. Use Value: Removes pipeline stalls caused by bus arbitration; sustains >40 MB/s sustained throughput per port under worst-case timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C028V-20AC | 20 ns access, 32K × 8, but uses 5 V only (no ±10% tolerance); lacks integrated semaphore logic | Requires external logic for semaphore/INT handling; suitable where arbitration is software-managed | Select when legacy Cypress footprint compatibility is required and arbitration is handled externally. |
| Renesas R1EX24032AS0I-20 | 20 ns access, 32K × 8, but supports only commercial temp range (0°C to +70°C); no BUSY arbitration | Not rated for industrial environments; interrupt support limited to basic flag-only mode | Select only for cost-sensitive commercial systems where extended temperature operation is unnecessary. |
Compared with CY7C028V-20AC and R1EX24032AS0I-20, the IDT7007L20JI8 uniquely integrates full hardware arbitration (BUSY, SEM, INT) and industrial temperature rating in a single 80-pin TQFP package - reducing BOM count and enabling deterministic real-time behavior without firmware overhead.
Availability
IDT7007L20JI8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, real-time motor control systems, and avionics data concentrators requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for IDT7007L20JI8 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 conditioning ICs, now part of Renesas Electronics since 2019.
The IDT7007L20JI8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic interprocessor communication in industrial automation, aerospace, and real-time embedded systems where concurrent memory access and hardware arbitration are mandatory.
FAQ
What is the maximum operating temperature range for the IDT7007L20JI8?
The IDT7007L20JI8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table (DSC 2940/16, Table 5) and validated across all AC/DC electrical specifications at this range. This makes it suitable for deployment in harsh environments such as factory-floor controllers and outdoor telecom equipment.
Does the IDT7007L20JI8 support true simultaneous read operations from both ports to the same memory address?
Yes, the IDT7007L20JI8 features true dual-ported memory cells that allow simultaneous reads of the same memory location from left and right ports without conflict or timing penalty - explicitly stated in the Features section (page 1) and verified in Truth Table I (page 5) under "Non-Contention Read/Write Control".
How does the M/S pin affect BUSY signal behavior on the IDT7007L20JI8?
When M/S = HIGH, the IDT7007L20JI8 operates as a Master: BUSYL and BUSYR are push-pull outputs asserting during port contention. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven externally to inhibit writes - per Note 1 on page 1 and Functional Description (page 17).
Can the IDT7007L20JI8 be used in a 16-bit data bus configuration?
Yes, the IDT7007L20JI8 supports 16-bit expansion using Master/Slave cascading: one device configured as Master (M/S = H) and another as Slave (M/S = L) enables full-speed 16-bit word access without additional discrete logic - as described in the Features section (page 1) and Device Description (page 2).
What are the valid interrupt mailbox addresses for the IDT7007L20JI8?
The IDT7007L20JI8 uses fixed interrupt mailbox addresses: writing to 7FFEh (hex) on the right port asserts INTL; writing to 7FFFh (hex) on the left port asserts INTR. Clearing is performed by reading those same addresses - confirmed in Truth Table III (page 16) and Functional Description (page 17).
7007L20JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-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:
- 256Kbit
- Memory Organization:
- 32K 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:
- 68-PLCC (24.21x24.21)
7007L20JI8 FAQ
1.How can I place an order for 7007L20JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7007L20JI8 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 7007L20JI8 reliable?
The price and inventory of 7007L20JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7007L20JI8 is usually 5 days.
3.What payment methods are accepted for 7007L20JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7007L20JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7007L20JI8?
7007L20JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7007L20JI8 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 7007L20JI8?
For technical support, including 7007L20JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7007L20JI8 requirements.
6.How does Aetrix verify that 7007L20JI8 is sourced from the original manufacturer or authorized distributors?
All 7007L20JI8 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 7007L20JI8 meets industry standards.
7.What is the process for return or replacement of 7007L20JI8?
All 7007L20JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7007L20JI8, 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 7007L20JI8 part is unused and in its original packaging.
Return procedure for 7007L20JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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