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Renesas 7024S20JI8
- Part No.:
- 7024S20JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S20JI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
7024S20JI8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent asynchronous left/right ports, 20 ns max access time (commercial/industrial), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic-designed for real-time inter-processor communication in embedded control systems.
For engineers reviewing the 7024S20JI8 datasheet, 7024S20JI8 pinout, 7024S20JI8 application, or 7024S20JI8 equivalent, this page delivers verified specifications including BUSY/INT flag behavior, byte-selectable I/O control, dual-port contention resolution timing, and battery-backed data retention down to 2V-critical for deterministic multi-CPU memory sharing.
Technical Context
The 7024S20JI8 implements full hardware port arbitration with dedicated BUSY output (Master) or input (Slave) via M/S pin, enabling cascaded master/slave configurations for 32-bit+ bus expansion without external logic. Its dual-port architecture supports simultaneous reads of identical addresses and includes eight addressable semaphore flags (A0–A2) accessed via SEM pin control.
It features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables per port, allowing multiplexed bus compatibility, and supports three power states: active (750 mW typ.), standby (5 mW typ. for S version), and data retention at 2V (L version only). The device operates across –40°C to +85°C (industrial grade).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent address/data/control per port |
| Access Time (max) | 20 ns - guarantees deterministic read latency for real-time inter-processor handshaking |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; no auxiliary voltage rails required |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded applications with thermal cycling resilience |
| Power Consumption | 750 mW active / 5 mW standby (typ.) - enables low-heat-density board layouts in dense control modules |
| Data Retention | 2 V minimum - supports battery backup during main power loss without volatile data corruption |
| Package | 84-pin PLCC (J suffix) - surface-mount compatible with standard reflow profiles and IPC-compliant footprint |
Pinout & Package
7024S20JI8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MS-026AC compliant, with 0.050″ lead pitch and body size ≈ 1.15″ × 1.15″ × 0.17″. All VCC and GND pins must be connected per datasheet note; N/C pins are internally unused.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low per-port enable; deassertion places corresponding port in high-impedance or standby mode |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write strobe; determines direction of data flow on associated I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low control for tri-state output drivers; decouples data bus when inactive |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select (Left / Right) | Enables 8-bit granularity writes/reads-essential for mixed-width peripheral interfacing |
| SEML / SEMR | Semaphore Enable (Left / Right) | Activates 3-bit addressable semaphore register access (A0–A2) for inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Left / Right) | When M/S = H (Master), BUSY outputs contention status; when M/S = L (Slave), BUSY is input for arbitration |
| INTL / INTR | Interrupt Flag (Left / Right) | Open-drain push-pull output signaling semaphore state change or port event to host controller |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit address buses supporting full 4K address space per port; non-mirrored, fully independent |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data buses; support simultaneous read/write to same location with no conflict |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables concurrent read access to identical memory locations-eliminates software polling delays in lock-step processors |
| On-chip semaphore logic | Eight hardware semaphore flags (A0–A2) with atomic read/write-replaces discrete latches and reduces BOM count |
| Master/Slave cascade support | M/S pin configures BUSY as output (Master) or input (Slave), enabling error-free 32-bit+ word expansion without glue logic |
| Full asynchronous operation | Independent clockless control per port-simplifies timing closure in heterogeneous system-on-module designs |
| Battery backup data retention | Operates down to 2V VCC with ≤4 mA retention current-supports fail-safe logging during AC power interruption |
Applications
| Industrial PLC Backplane Memory | Avionics Dual-Processor Data Exchange |
|---|---|
|
Use Scenario: Two independent CPUs share configuration tables and real-time I/O status in a modular programmable logic controller. IC Role / Device Role / Timing Role: 7024S20JI8 serves as shared scratchpad memory with hardware semaphore coordination between ladder logic and motion control cores. Use Value: Eliminates software mutex overhead and guarantees sub-20 ns inter-core data visibility-critical for <10 ms scan cycle compliance. |
Use Scenario: Flight management computer (FMC) and autothrottle unit exchange navigation updates and engine commands in DO-254-certified avionics. IC Role / Device Role / Timing Role: 7024S20JI8 provides deterministic, contention-free memory access with BUSY-flag arbitration for fault-tolerant dual-channel architectures. Use Value: Enables certified lockstep verification without external arbitration logic-reducing design validation scope and certification effort. |
| Medical Imaging Frame Buffer | Test Equipment Pattern Generator |
|
Use Scenario: MRI subsystem uses one port for raw sensor data capture and second port for real-time image reconstruction pipeline. IC Role / Device Role / Timing Role: 7024S20JI8 acts as ping-pong frame buffer with independent 16-bit I/O buses synchronized via semaphore handshake. Use Value: Supports continuous 20 ns-latency data streaming while reconstruction runs concurrently-no DMA bottlenecks or FIFO overflow. |
Use Scenario: Automated test equipment (ATE) generates stimulus patterns on one port while reading response signatures on the other. IC Role / Device Role / Timing Role: 7024S20JI8 functions as pattern memory with byte-selectable writes and interrupt-driven result capture. Use Value: Achieves precise 20 ns-aligned stimulus/response correlation-enabling sub-nanosecond jitter measurement in high-speed digital validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-20AXC | 20 ns access, 4K × 16, but uses 100-pin TQFP; no native M/S cascade mode-requires external logic for master/slave chaining | Preferred where PCB area allows larger package and system-level arbitration is already implemented | Select when migrating legacy Cypress-based designs or requiring RoHS-compliant green packaging with identical speed grade |
| IS61LV25616AL-20TQLI | 20 ns access, 16K × 16 organization; single-port only; no BUSY/SEM logic-requires external arbitration IC | Suitable for cost-sensitive applications where dual-port concurrency is not required and memory depth is prioritized | Choose only if expanding to 256Kbit capacity is mandatory and inter-processor coordination can be handled in firmware or companion logic |
Compared with CY7C024AV-20AXC and IS61LV25616AL-20TQLI, the 7024S20JI8 uniquely integrates hardware semaphore arbitration and Master/Slave cascade capability in a compact 84-pin PLCC-reducing component count and eliminating timing-critical external glue logic in tightly coupled dual-CPU systems.
Availability
7024S20JI8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data exchange modules, and medical imaging subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 7024S20JI8 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, and RF solutions, now part of Renesas Electronics since 2019.
The 7024S20JI8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in mission-critical industrial and aerospace systems.
FAQ
What is the operating temperature range for the 7024S20JI8?
The 7024S20JI8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its "I" suffix in the part number and validated in Table 2 of the datasheet. This range ensures reliable performance in harsh environments such as factory automation controllers and outdoor telecom infrastructure where ambient thermal cycling occurs.
Does the 7024S20JI8 support battery backup data retention?
The 7024S20JI8 supports data retention at 2V VCC, but only the "L" variant (e.g., 7024L20JI8) is specified for low-power retention mode. The "S" suffix in 7024S20JI8 indicates standard power consumption (5 mW standby), and its retention capability is not characterized-designers requiring battery backup must select the L version.
How does the M/S pin configure master/slave operation in the 7024S20JI8?
In the 7024S20JI8, the M/S pin sets BUSY behavior: when high, BUSY is an output flag indicating port contention (Master mode); when low, BUSY becomes an input for arbitration signaling (Slave mode). This enables seamless cascading of multiple devices without external logic-verified in Functional Description section and Truth Table I.
What package type does the 7024S20JI8 use, and what does the "J" suffix indicate?
The "J" in 7024S20JI8 denotes an 84-pin Plastic Leaded Chip Carrier (PLCC) package, as documented in Pin Configurations section and ordering information. This surface-mount package features gull-wing leads, JEDEC MS-026AC compliance, and is optimized for reflow assembly in high-reliability industrial PCBs.
Can the 7024S20JI8 perform simultaneous reads from both ports to the same memory address?
Yes-the 7024S20JI8 uses true dual-port SRAM cells that allow concurrent read operations to identical addresses on left and right ports without contention or timing penalty. This capability is explicitly stated in the Features section and confirmed by the "True Dual-Ported memory cells" bullet point in the datasheet.
7024S20JI8 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:
- 64Kbit
- Memory Organization:
- 4K x 16
- 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)
7024S20JI8 FAQ
1.How can I place an order for 7024S20JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S20JI8 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 7024S20JI8 reliable?
The price and inventory of 7024S20JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S20JI8 is usually 5 days.
3.What payment methods are accepted for 7024S20JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S20JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S20JI8?
7024S20JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S20JI8 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 7024S20JI8?
For technical support, including 7024S20JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S20JI8 requirements.
6.How does Aetrix verify that 7024S20JI8 is sourced from the original manufacturer or authorized distributors?
All 7024S20JI8 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 7024S20JI8 meets industry standards.
7.What is the process for return or replacement of 7024S20JI8?
All 7024S20JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7024S20JI8, 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 7024S20JI8 part is unused and in its original packaging.
Return procedure for 7024S20JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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