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Renesas 7007S20J8
- Part No.:
- 7007S20J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7007S20J8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
7007S20J8 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 temperature range), TTL-compatible 5 V ±10% supply, and on-chip semaphore/interrupt arbitration logic. It enables simultaneous read access to the same memory location in real-time interprocessor communication systems.
For engineers reviewing the 7007S20J8 datasheet, 7007S20J8 pinout, 7007S20J8 application, or 7007S20J8 equivalent, key selection criteria include BUSY-flag arbitration timing (tBDD ≤ 30 ns), dual-port power-down current (ISB3 ≤ 0.2 mA), and Master/Slave configuration via M/S pin for 16-bit bus expansion.
Technical Context
The 7007S20J8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention using either CE-controlled or address-match–based BUSY assertion, with tAPS = 5 ns setup time required for deterministic priority resolution.
It supports two distinct memory access modes: standard RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), with dedicated A0–A2 addressing for eight semaphore flags and interrupt flag control at fixed addresses 7FFEH (INTL) and 7FFFH (INTR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits (256 Kbit total); supports independent concurrent reads/writes on left and right ports |
| Access Time (tAA) | 20 ns max (industrial grade, –40°C to +85°C); guarantees deterministic latency for real-time inter-processor handshaking |
| Supply Voltage | 5.0 V ±10%; compatible with legacy TTL logic families without level translation |
| Standby Current (ISB3) | 0.2 mA max (full standby, CMOS-level inputs); enables ultra-low-power sleep mode during idle port periods |
| Bus Width Expansion | Master/Slave (M/S) pin enables cascading for 16-bit+ data paths without external glue logic |
| Arbitration Logic | Hardware semaphore (SEML/SEMR), BUSY flag (BUSYL/BUSYR), and interrupt (INTL/INTR) support built-in - no firmware overhead |
| Package | 80-pin TQFP (14 mm × 14 mm × 1.4 mm); RoHS-compliant, green-part option available |
Pinout & Package
7007S20J8 is packaged in an 80-pin thin quad flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port power-down (ISB1–ISB4 states) and memory access gating |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; determines data direction on I/OxL/I/OxR buses during CE-active cycles |
| OEL / OER | Output Enable (Left / Right) | Active-low tri-state control for I/O drivers; allows shared bus usage without external transceivers |
| A0L–A14L / A0R–A14R | Address Inputs (Left / Right) | 15-bit address buses (32K depth); independent addressing enables non-overlapping memory partitioning |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data paths; electrically isolated per port to prevent contention-induced corruption |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low select for semaphore register access (A0–A2 addressed); separates control-plane from data-plane operations |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Open-drain compatible push-pull outputs; assert on cross-port writes to 7FFEH/7FFFH mailboxes |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull outputs (Master) or inputs (Slave); signals arbitration conflict during simultaneous address match |
| M/S | Master/Slave Select | High = BUSY output (Master); Low = BUSY input (Slave); enables daisy-chained multi-device 16-bit systems |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads from identical addresses - critical for lock-free FIFOs and shared buffer coherency |
| Hardware Semaphore Logic | Eight dedicated semaphores (A0–A2 addressable) eliminate software mutex overhead and race conditions |
| Configurable Arbitration Mode | Supports both CE-driven and address-match–driven BUSY assertion, enabling flexible priority schemes |
| Low-Power Standby States | Four ISB modes (ISB1–ISB4) allow granular power gating per port or full chip, down to 0.2 mA |
| TTL-Compatible Interface | Direct connection to 5 V microcontrollers, FPGAs, and ASICs without level shifters or bus buffers |
Applications
| Industrial PLC Communication Hub | Avionics Data Concentrator |
|---|---|
Use Scenario: Two independent CPU modules (e.g., safety-critical and non-safety partitions) exchange sensor telemetry and control commands via shared memory. IC Role / Device Role / Timing Role: 7007S20J8 serves as the deterministic, hardware-arbitrated memory bridge with 20 ns access guaranteeing sub-50 µs round-trip message latency. Use Value: Eliminates software polling and OS scheduling jitter; BUSY flag ensures atomic mailbox updates without external locks. | Use Scenario: Flight management unit (FMU) and display processing unit (DPU) share real-time navigation state and rendering parameters. IC Role / Device Role / Timing Role: 7007S20J8 operates in Master/Slave configuration (M/S = H/L) to expand effective bus width to 16 bits while maintaining full-speed access. Use Value: Enables synchronized data transfer across dissimilar clock domains without FIFO synchronization logic or clock-domain-crossing circuitry. |
| Medical Imaging Subsystem Buffer | Test Equipment Pattern Generator |
Use Scenario: High-speed ADC front-end streams raw image frames to a DSP core for real-time reconstruction; both units access overlapping frame buffers. IC Role / Device Role / Timing Role: 7007S20J8 provides concurrent read (DSP) and write (ADC controller) access to same memory locations with tBDD ≤ 30 ns BUSY-to-data validity window. Use Value: Prevents pipeline stalls during burst transfers; semaphore registers coordinate frame ownership without CPU intervention. | Use Scenario: Automated test equipment uses one port to load stimulus patterns from host PC, second port to stream patterns to DUT interface logic. IC Role / Device Role / Timing Role: 7007S20J8 acts as a dual-clock domain buffer with independent CE/R/W timing per port, supporting asynchronous host-DUT handshaking. Use Value: Reduces pattern download latency by >40% vs. single-port SRAM + DMA controller; interrupt flags signal pattern completion to host. |
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, 32K × 8, but requires external BUSY arbitration logic; no integrated semaphore or interrupt flags | Lacks hardware mailbox and semaphore registers - increases firmware complexity and latency | Select when cost sensitivity outweighs need for integrated arbitration; verify external logic fits timing budget |
| IDT70V27L20PF | Lower power (ISB3 = 0.1 mA), 3.3 V supply, but 25 ns access time and no M/S pin for bus expansion | Not pin-compatible; requires voltage translation and layout redesign; lacks Master/Slave cascading capability | Choose only for new 3.3 V designs where 5 ns slower access is acceptable and bus expansion is unnecessary |
Compared with CY7C028V-20AXC and IDT70V27L20PF, the 7007S20J8 uniquely delivers 20 ns industrial-grade access with integrated semaphore, interrupt, and M/S-configurable bus expansion - reducing BOM count and firmware overhead in real-time embedded systems.
Availability
7007S20J8 is available at Aetrix Electronics and suitable for industrial PLC communication hubs, avionics data concentrators, medical imaging subsystems, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for 7007S20J8 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 IDT7007 family was designed specifically for deterministic interprocessor communication in real-time embedded systems, emphasizing hardware arbitration, low-latency dual-port access, and seamless 16-bit bus scalability.
FAQ
What is the operating temperature range for the 7007S20J8?
The 7007S20J8 is rated for the industrial temperature range of –40°C to +85°C. This is confirmed in the Absolute Maximum Ratings table and DC Operating Conditions section of the official IDT datasheet (DSC 2940/16), where "7007S" denotes the industrial-speed grade with S-suffix packaging.
Does the 7007S20J8 support true simultaneous read operations from both ports to the same memory address?
Yes, the 7007S20J8 supports true simultaneous reads from identical addresses on left and right ports - a core feature explicitly stated in the "Features" section: "True Dual-Ported memory cells which allow simultaneous reads of the same memory location." This behavior is electrically guaranteed and does not trigger BUSY arbitration.
How is Master/Slave configuration implemented on the 7007S20J8?
Master/Slave configuration is controlled solely by the M/S pin: when M/S = HIGH, BUSYL and BUSYR function as outputs (Master mode); when M/S = LOW, they become inputs (Slave mode). This enables cascaded configurations for 16-bit-or-wider data buses, as documented in the Functional Block Diagram and Pin Names table of the 7007S20J8 datasheet.
What are the valid addresses for interrupt flag control in the 7007S20J8?
The 7007S20J8 uses fixed addresses for interrupt mailbox control: writing to address 7FFEH (hex) with CEL = R/WL = VIL asserts the left-port INTL flag, and writing to 7FFFH with CER = R/WR = VIL asserts the right-port INTR flag. These are defined in Truth Table III and the Functional Description section of the datasheet.
Can the 7007S20J8 operate with a 3.3 V supply?
No, the 7007S20J8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V), as specified in the Recommended DC Operating Conditions table. It is TTL-compatible and not rated for 3.3 V operation; attempting 3.3 V supply will result in undefined functionality and potential data corruption.
7007S20J8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7007S20J8 FAQ
1.How can I place an order for 7007S20J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7007S20J8 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 7007S20J8 reliable?
The price and inventory of 7007S20J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7007S20J8 is usually 5 days.
3.What payment methods are accepted for 7007S20J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7007S20J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7007S20J8?
7007S20J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7007S20J8 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 7007S20J8?
For technical support, including 7007S20J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7007S20J8 requirements.
6.How does Aetrix verify that 7007S20J8 is sourced from the original manufacturer or authorized distributors?
All 7007S20J8 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 7007S20J8 meets industry standards.
7.What is the process for return or replacement of 7007S20J8?
All 7007S20J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7007S20J8, 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 7007S20J8 part is unused and in its original packaging.
Return procedure for 7007S20J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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