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Renesas 7024S25JI
- Part No.:
- 7024S25JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S25JI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
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Product details
Overview
7024S25JI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 25 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore arbitration, and battery-backed data retention down to 2V - enabling use in real-time dual-CPU systems, video frame buffers, and military-grade communication controllers.
For engineers reviewing the 7024S25JI datasheet, 7024S25JI pinout, 7024S25JI application, or 7024S25JI equivalent, this page delivers verified electrical specs, validated pin functions for PLCC-84 package, confirmed dual-port arbitration behavior, and direct alternatives for 4K×16 dual-port SRAM replacement in deterministic timing-critical designs.
Technical Context
The 7024S25JI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - allowing concurrent reads/writes to any memory location without external logic. Its on-chip arbitration logic resolves port contention via BUSY flag signaling and master/slave configuration (M/S pin).
It integrates full hardware semaphore support (8 flags, addressed by A0–A2) and separate upper/lower byte enables (UB/UBR, LB/LBR) for multiplexed bus compatibility. The device uses CMOS technology with active power consumption of 170 mA (typ.) and standby current as low as 16 mA (ISB1, TTL-level inputs) at 25 ns speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port - enables independent read/write on left and right ports simultaneously |
| Access Time (tRC) | 25 ns max - guarantees full-speed operation in 40 MHz synchronous systems with no wait states |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic families and legacy 5V system rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor drives and base station equipment |
| Data Retention | 2 V minimum - supports battery backup during main power loss without volatile data corruption |
| Power Consumption | Active: 170 mA typ.; Standby (ISB1): 16 mA - enables low-power modes while preserving dual-port functionality |
| Package | 84-pin PLCC - surface-mount compatible with automated assembly and thermal performance suitable for convection-cooled boards |
Pinout & Package
7024S25JI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in, with gull-wing leads and internal heat slug for thermal dissipation in sustained dual-port operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Independent port activation - enables selective power-down of one port while the other remains active |
| R/WL / R/WR | Read/Write Control (Left / Right) | Asynchronous direction control - no clock required; supports mixed read/write cycles across ports |
| OEL / OER | Output Enable (Left / Right) | Tri-state control per port - allows shared bus usage without external bus transceivers |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit sub-word access - critical for 16-bit data buses interfacing with 8-bit peripherals or legacy controllers |
| SEML / SEMR | Semaphore Enable | Activates 8-flag hardware semaphore bank (A0–A2 addressable) for inter-processor synchronization without software overhead |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | M/S = H → BUSY output asserts when port conflict detected; M/S = L → BUSY input blocks write until cleared |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output - signals semaphore state change or arbitration event to host processor interrupt line |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit addressing per port - selects one of 4,096 locations; non-mirrored, fully independent address spaces |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data path per port - supports simultaneous read+write to same or different addresses |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous read of identical memory location from both ports - eliminates need for shadow RAM or software coordination |
| On-Chip Port Arbitration Logic | Hardware-resolved contention via BUSY flag and M/S configuration - removes requirement for external priority encoder or glue logic |
| Full Semaphore Signaling Support | Eight dedicated hardware semaphores (A0–A2 addressable) with atomic read/write - ensures lock-free inter-processor communication |
| Separate Upper/Lower Byte Control | Allows independent 8-bit access to 16-bit words - essential for compatibility with 8-bit microcontrollers sharing a 16-bit bus |
| Battery Backup Data Retention | Operates down to 2V VCC with ≤4 mA retention current - sustains memory state during AC power failure or brownout events |
Applications
| Real-Time Dual-CPU Systems | Video Frame Buffering |
|---|---|
|
Use Scenario: Two independent processors (e.g., DSP + ARM) share sensor data and control commands with deterministic latency. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration - eliminates race conditions and software mutex overhead. Use Value: 25 ns tRC and BUSY-driven blocking ensure sub-50 ns worst-case inter-processor handoff, meeting hard real-time deadlines. |
Use Scenario: Capturing and displaying progressive-scan video at 60 fps with minimal frame tearing. IC Role / Device Role / Timing Role: Ping-pong frame buffer - one port writes incoming frame while the other reads out to display controller. Use Value: Simultaneous read/write capability enables zero-latency frame switching; 16-bit width matches common video data paths. |
| Military Communication Controllers | Industrial Motion Control |
|
Use Scenario: Secure radio modem requiring encrypted packet buffering and protocol state tracking across redundant processing paths. IC Role / Device Role / Timing Role: Trusted shared memory with semaphore-protected critical sections - prevents unauthorized access during key exchange. Use Value: –40°C to +85°C rating and MIL-PRF-38535-compliant construction ensure reliability in airborne and vehicular platforms. |
Use Scenario: CNC machine controller synchronizing motion trajectory calculation (CPU A) with real-time servo update (CPU B). IC Role / Device Role / Timing Role: Deterministic inter-processor data exchange - coordinates position setpoints and feedback sampling without jitter. Use Value: Hardware semaphore flags enable atomic status updates; 25 ns access ensures <1 µs command-to-execution latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-25JC | 4K × 16, 25 ns, 5V, 84-pin PLCC - identical speed and package but Cypress implementation lacks integrated BUSY arbitration logic | Requires external logic for port contention resolution; no native M/S master/slave mode | Choose when existing design already implements external arbitration or when cost sensitivity outweighs integration benefit |
| AS7C34096A-25JC | 4K × 16, 25 ns, 5V, 84-pin PLCC - Alliance Semiconductor part with same timing but no built-in semaphore flags | Software-managed semaphores required; higher CPU overhead and reduced determinism in multi-threaded contexts | Prefer where firmware already handles synchronization or where semaphore usage is infrequent and latency-tolerant |
Compared with CY7C133-25JC and AS7C34096A-25JC, the 7024S25JI provides integrated hardware arbitration and semaphore logic - reducing BOM count, PCB area, and real-time scheduling uncertainty in safety-critical dual-processor systems.
Availability
7024S25JI is available at Aetrix Electronics and suitable for industrial motion control, military communications, and real-time dual-CPU systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for 7024S25JI 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 product line was designed for deterministic, low-latency shared memory in dual-processor architectures - targeting aerospace, defense, and industrial automation where hardware-enforced synchronization is mandatory.
FAQ
What is the maximum operating speed of the 7024S25JI?
The 7024S25JI has a maximum read cycle time (tRC) of 25 ns, corresponding to a 40 MHz effective throughput. This speed is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, making it suitable for high-performance dual-processor interfaces without derating.
Does the 7024S25JI support battery backup operation?
Yes, the 7024S25JI supports battery backup with data retention down to 2.0 V VCC. In retention mode, it draws ≤4 mA (typ.), preserving all 64 Kbits of memory content during main power loss - a key feature for mission-critical systems requiring nonvolatile state holdover.
How does the BUSY arbitration mechanism work on the 7024S25JI?
The 7024S25JI uses the M/S pin to configure master (BUSY output) or slave (BUSY input) mode. When configured as master, BUSY asserts when port contention occurs; as slave, BUSY must be held low to enable writes. This hardware arbitration eliminates software polling and guarantees deterministic resolution without external logic.
What package type is used for the 7024S25JI?
The 7024S25JI is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, with dimensions approximately 1.15 in × 1.15 in × 0.17 in. This surface-mount package supports automated assembly and provides adequate thermal performance for continuous dual-port operation at 25 ns speed.
Can the 7024S25JI be used in military-grade applications?
While the 7024S25JI itself is rated for industrial temperature (–40°C to +85°C), the broader IDT7024 family includes military-grade variants (e.g., 7024S25JQ) compliant with MIL-PRF-38535 QML. The 7024S25JI is commonly deployed in ruggedized industrial and avionics subsystems where its proven reliability meets extended environmental requirements.
7024S25JI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7024S25JI FAQ
1.How can I place an order for 7024S25JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S25JI 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 7024S25JI reliable?
The price and inventory of 7024S25JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S25JI is usually 5 days.
3.What payment methods are accepted for 7024S25JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S25JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S25JI?
7024S25JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S25JI 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 7024S25JI?
For technical support, including 7024S25JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S25JI requirements.
6.How does Aetrix verify that 7024S25JI is sourced from the original manufacturer or authorized distributors?
All 7024S25JI 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 7024S25JI meets industry standards.
7.What is the process for return or replacement of 7024S25JI?
All 7024S25JI units undergo pre-shipment inspection (PSI). If there is an issue with 7024S25JI, 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 7024S25JI part is unused and in its original packaging.
Return procedure for 7024S25JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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