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Renesas 7024S25J
- Part No.:
- 7024S25J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S25J.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,850
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Product details
Overview
7024S25J from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 25 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic-used in real-time inter-processor communication systems requiring simultaneous access to shared memory without external logic.
For engineers reviewing the 7024S25J datasheet, 7024S25J pinout, 7024S25J application, or 7024S25J equivalent, key selection considerations include its Master/Slave BUSY flag protocol, byte-selectable I/O control (UBL/LBL), integrated port arbitration, battery-backed data retention at 2V (L-version), and availability in 84-pin PLCC package with industrial temperature support.
Technical Context
The 7024S25J implements fully asynchronous dual-port operation: either port can perform independent reads or writes to any address without synchronization. Its on-chip arbitration logic resolves contention via BUSY flag signaling when M/S = H (Master) or L (Slave), and supports eight hardware semaphores addressed by A0–A2 for inter-port synchronization.
It features separate upper-byte (I/O8–I/O15) and lower-byte (I/O0–I/O7) controls per port, enabling multiplexed bus compatibility. The device operates in three power modes-active (750 mW typ.), standby (5 mW typ. for S-version), and full standby (<0.2 mA)-with automatic power-down triggered by CE high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4K × 16 bits (64 Kbit), organized as 4096 addresses × 16 data bits per port |
| Access Time | 25 ns max (commercial grade), defines minimum read cycle time tRC for timing-critical real-time systems |
| Supply Voltage | 5.0 V ±10%, TTL-compatible interface eliminates level-shifting in legacy 5V designs |
| Power Consumption | 750 mW typical active, 5 mW typical standby-enables low-heat operation in dense embedded memory subsystems |
| Operating Temp | –40°C to +85°C (industrial grade), validated for deployment in ruggedized industrial controllers and telecom line cards |
| Data Retention | 2 V min VCC retention (L-version only); 7024S25J is S-version-no battery backup support |
| Package | 84-pin PLCC (PLG84), surface-mount compatible with standard reflow profiles and IPC-compliant board layouts |
Pinout & Package
7024S25J is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC, code PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, with gull-wing leads suitable for automated assembly and thermal cycling reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables memory access on respective port; deassertion places port in high-Z standby |
| R/WL / R/WR | Read/Write Control (Left / Right) | Low = write, high = read; controls direction of data flow on associated I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; used with R/W to manage bus contention during mixed read/write operations |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Independent byte masking per port-enables 8-bit transfers on 16-bit bus without glue logic |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register (addressed by A0–A2) for inter-port synchronization and resource locking |
| BUSYL / BUSYR | Busy Flag (Master output / Slave input) | When M/S = H, BUSY is driven high during internal arbitration; when M/S = L, BUSY is sampled to block conflicting writes |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore state change or arbitration event to host processor |
| A0L–A11L, A0R–A11R | Address Inputs (12-bit per port) | 4096 unique addresses per port; non-mirrored addressing allows independent access to same or different locations |
| I/O0L–I/O15L, I/O0R–I/O15R | Data I/O (16-bit bidirectional per port) | True dual-port cells permit simultaneous read of identical location-critical for lock-free data sharing |
| M/S | Master/Slave Select | Configures device role in cascaded systems: H = Master (BUSY output), L = Slave (BUSY input) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables concurrent read access to identical memory locations-eliminates need for shadow buffers or software polling in multi-CPU systems |
| On-Chip Port Arbitration Logic | Hardware-resolved contention via BUSY flag handshake prevents data corruption during simultaneous writes to same address |
| Full Semaphore Signaling Support | Eight dedicated hardware semaphores (A0–A2 addressable) provide atomic resource locking across ports without CPU intervention |
| Separate Upper/Lower Byte Control | Permits partial-word writes (8-bit) on 16-bit bus-reduces bus traffic and avoids read-modify-write cycles in mixed-data-width systems |
| Asynchronous Operation | No clock required; timing defined solely by setup/hold and access parameters-simplifies integration into clock-domain-isolated subsystems |
Applications
| Industrial Motion Controller | Telecom Line Card Buffer |
|---|---|
|
Use Scenario: Two DSPs coordinate motor trajectory calculation and real-time PWM update via shared memory. IC Role / Device Role / Timing Role: 7024S25J serves as zero-latency inter-processor buffer with hardware semaphore coordination. Use Value: Eliminates software mutex overhead and guarantees deterministic <25 ns memory access for sub-millisecond motion loop timing. |
Use Scenario: ATM or packet switch ASIC shares frame descriptors and status flags with management microcontroller. IC Role / Device Role / Timing Role: 7024S25J acts as dual-access descriptor table with BUSY-driven arbitration between ASIC and MCU. Use Value: Enables concurrent descriptor read (ASIC) and status update (MCU) without pipeline stalls or external arbitration logic. |
| Avionics Data Concentrator | Medical Imaging Subsystem |
|
Use Scenario: Flight computer and sensor acquisition module exchange telemetry packets via shared memory ring buffer. IC Role / Device Role / Timing Role: 7024S25J provides fault-tolerant, lock-free data exchange with interrupt-driven semaphore signaling. Use Value: Guarantees data coherency across safety-critical domains while meeting DO-254 timing constraints (25 ns access). |
Use Scenario: FPGA-based image processor streams raw pixel data to ARM host for post-processing and display. IC Role / Device Role / Timing Role: 7024S25J functions as high-bandwidth frame buffer with independent read/write ports. Use Value: Supports simultaneous 16-bit pixel write (FPGA) and 8-bit metadata read (ARM) using UBL/LBL byte enables. |
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-25AXC | 25 ns access, 4K × 16, 3.3V core (5V tolerant I/O), 100-pin TQFP only | Requires level translation in pure 5V systems; lacks M/S-configurable BUSY protocol | Prefer for new 3.3V designs needing lower power; not drop-in for 7024S25J's PLCC footprint or 5V-native timing |
| IDT70V24S25PF | 25 ns, 4K × 16, 3.3V supply, 84-pin PLCC, supports JTAG boundary scan | Lower voltage reduces power but invalidates 5V TTL compatibility; no 2V data retention mode | Select when migrating to 3.3V infrastructure and requiring testability; requires PCB redesign for voltage and decoupling |
Compared with CY7C024AV-25AXC and IDT70V24S25PF, the 7024S25J delivers native 5V operation, proven industrial temperature stability, and hardware Master/Slave BUSY arbitration-making it optimal for legacy and ruggedized 5V dual-processor systems where pinout and voltage compatibility are mandatory.
Availability
7024S25J is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics data concentrators, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for 7024S25J 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 IDT7024 family was designed for high-reliability, real-time inter-processor communication in military, industrial, and telecom infrastructure-prioritizing deterministic timing, hardware arbitration, and robust packaging.
FAQ
What is the maximum operating speed of the 7024S25J?
The 7024S25J has a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum throughput of 40 MHz for consecutive reads. This rating applies under commercial temperature conditions (0°C to +70°C) with VCC = 5.0 V ±10%. The 7024S25J is not rated for industrial or military speeds-those require suffix variants like 7024S20J or 7024S35J.
Does the 7024S25J support battery backup data retention?
No, the 7024S25J does not support battery backup data retention. That feature is exclusive to the 'L' version (e.g., 7024L25J), which specifies 2 V minimum VCC for data retention. The 'S' in 7024S25J denotes standard power consumption (750 mW active, 5 mW standby), with no guaranteed operation below 4.5 V.
Can the 7024S25J be used in a Master/Slave configuration with other IDT7024 devices?
Yes, the 7024S25J supports cascaded Master/Slave operation via the M/S pin: set M/S = H on one device for BUSY output (Master), and M/S = L on others for BUSY input (Slave). This enables expansion to 32-bit or wider data buses without external logic, as confirmed in the functional description and truth tables of the official datasheet.
What package type is used for the 7024S25J?
The 7024S25J is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC), designated PLG84 in IDT documentation. Its body dimensions are approximately 1.15 inches × 1.15 inches × 0.17 inches, with gull-wing leads compatible with standard surface-mount assembly processes and IPC-A-610 Class 2/3 acceptance criteria.
How does semaphore functionality work on the 7024S25J?
The 7024S25J implements eight hardware semaphores accessed via A0–A2 address lines when SEM = VIL. Writing to I/O0 sets the flag; reading returns the flag state across all 16 I/O pins. This enables atomic resource locking between ports without CPU involvement-critical for deterministic inter-processor synchronization in real-time systems using the 7024S25J.
7024S25J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7024S25J FAQ
1.How can I place an order for 7024S25J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S25J 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 7024S25J reliable?
The price and inventory of 7024S25J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S25J is usually 5 days.
3.What payment methods are accepted for 7024S25J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S25J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S25J?
7024S25J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S25J 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 7024S25J?
For technical support, including 7024S25J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S25J requirements.
6.How does Aetrix verify that 7024S25J is sourced from the original manufacturer or authorized distributors?
All 7024S25J 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 7024S25J meets industry standards.
7.What is the process for return or replacement of 7024S25J?
All 7024S25J units undergo pre-shipment inspection (PSI). If there is an issue with 7024S25J, 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 7024S25J part is unused and in its original packaging.
Return procedure for 7024S25J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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