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Renesas 7024S35J8
- Part No.:
- 7024S35J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S35J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
7024S35J8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time embedded systems.
For engineers reviewing the 7024S35J8 datasheet, 7024S35J8 pinout, 7024S35J8 application, or 7024S35J8 equivalent, key selection considerations include BUSY-flag port arbitration timing (tBDD ≤ 30 ns), battery-backed data retention at 2V (L-version only), dual-byte enable control (UBL/LBL), and compatibility with industrial temperature range designs requiring deterministic dual-port contention resolution.
Technical Context
The 7024S35J8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves port contention via BUSY flag signaling and supports semaphore flag access through dedicated SEM pins and A0–A2 addressing.
It features full hardware semaphore support with eight programmable flags, interrupt flag generation (INTL/INTR), and Master/Slave select (M/S) configuration for cascaded systems. The device operates in three power states: active (750 mW typ.), standby (5 mW typ. for S-version), and data retention (2V, 100–4000 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent left/right address/data/control |
| Access Time (max) | 35 ns - guarantees worst-case read latency for commercial-grade timing-critical interfaces |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no auxiliary supplies required |
| Operating Temperature | 0°C to +70°C - commercial grade; validated across full ambient range per MIL-PRF-38535 QML |
| Power Consumption | Active: 750 mW typ.; Standby: 5 mW typ. - enables low-duty-cycle embedded control applications |
| Data Retention | 2 V minimum - supports battery backup mode; not applicable to S-version (7024S35J8 is S-grade) |
| Package | 84-pin PLCC (J8 suffix) - surface-mount, leaded, RoHS-compliant, 27.9 × 27.9 mm body |
Pinout & Package
7024S35J8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), J8 suffix, with 0.050" lead pitch and JEDEC MS-026AC compliant footprint. Pin 1 identifier notch located at top-left corner when viewed from top with index mark oriented upper-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation; deassertion places respective port in high-Z/standby |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low; determines direction of data transfer on associated port |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O drivers independently per port; enables byte-level output control |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity writes/reads; essential for multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Activates semaphore flag access mode; used with A0–A2 to read/write 8 semaphore bits |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | Indicates port contention; M/S = H configures BUSY as output (Master), M/S = L as input (Slave) |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or arbitration event to host controller |
| M/S | Master/Slave Select | Configures device role in cascaded systems; determines BUSY pin direction and arbitration priority |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous reads from identical addresses on both ports-no arbitration delay or data corruption |
| On-Chip Port Arbitration Logic | Resolves contention automatically via BUSY flag handshake; eliminates need for external glue logic in multi-CPU systems |
| Full Semaphore Hardware Support | Eight dedicated flags accessible via A0–A2 and SEM pins; enables inter-processor synchronization without software overhead |
| Separate Upper/Lower Byte Control | Allows independent 8-bit writes to high/low bytes-critical for legacy 8-bit peripheral interfacing and bus multiplexing |
| TTL-Compatible Interface | Direct connection to 5V microcontrollers and FPGAs without level-shifting; VIH = 2.2 V min, VIL = 0.8 V max |
Applications
| Real-Time Multi-Processor Communication | Digital Signal Processing Buffering |
|---|---|
Use Scenario: Two independent CPUs share sensor data and control commands in a radar signal processor. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared memory buffer with hardware-enforced mutual exclusion via semaphore flags. Use Value: Eliminates software polling or OS-level locks; ensures deterministic <30 ns port-to-port write-read delay (tBDD) for sub-microsecond response. |
Use Scenario: An FPGA-based FFT engine streams incoming ADC samples into one port while a DSP reads processed results from the other. IC Role / Device Role / Timing Role: Provides asynchronous, non-blocking data staging between pipeline stages with independent clock domains. Use Value: Enables continuous data flow without FIFO overflow or stall cycles; 35 ns access supports >28 MHz sustained throughput per port. |
| Industrial PLC I/O Data Exchange | Legacy Bus Expansion Interface |
Use Scenario: A safety-rated PLC uses dual-CPU redundancy where primary and backup controllers synchronize status via shared memory. IC Role / Device Role / Timing Role: Acts as fault-tolerant communication channel with BUSY-driven arbitration preventing conflicting writes during failover. Use Value: Guarantees atomic semaphore updates and interrupt-driven notification (INTL/INTR), meeting SIL-2 functional safety timing constraints. |
Use Scenario: A 16-bit microcontroller expands its data bus to 32-bit using two 7024S35J8 devices in MASTER/SLAVE configuration. IC Role / Device Role / Timing Role: One device configured as Master (M/S = H), second as Slave (M/S = L); BUSY flag coordinates access across chips. Use Value: Achieves full-speed 32-bit word access without wait states or external arbitration logic-reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-35JC | 35 ns access, 4K × 16, 5V, 84-pin PLCC-but lacks integrated semaphore logic and M/S cascade support | Requires external logic for semaphore handling and master/slave coordination | Choose when basic dual-port functionality suffices and system-level arbitration is implemented in FPGA/software |
| IDT70V24S35JG | 3.3V core, 35 ns, 4K × 16, 84-pin PLCC-pin-compatible but voltage-incompatible; requires level translation | Not directly substitutable in 5V systems; designed for lower-power, mixed-voltage architectures | Prefer for new 3.3V designs where power reduction outweighs redesign effort for level shifting |
Compared with CY7C136-35JC and IDT70V24S35JG, the 7024S35J8 delivers integrated hardware arbitration and seamless 5V TTL interoperability-making it optimal for legacy and real-time deterministic systems where minimizing external components and timing uncertainty is critical.
Availability
7024S35J8 is available at Aetrix Electronics and suitable for real-time multi-processor communication, digital signal processing buffering, and industrial PLC I/O data exchange requiring stable component supply across extended production lifecycles.
Supply support for 7024S35J8 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, now part of Renesas Electronics.
The 7024S35J8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered for deterministic, low-latency inter-processor communication in military, industrial, and telecom infrastructure equipment.
FAQ
What is the operating temperature range for the 7024S35J8?
The 7024S35J8 is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial (–40°C to +85°C) or military ranges-those require distinct part numbers such as 7024S20DI or 7024S20MI. The J8 suffix specifically denotes the 84-pin PLCC package in commercial grade.
Does the 7024S35J8 support battery backup data retention?
No, the 7024S35J8 does not support battery backup data retention. That capability is exclusive to the 'L' version (e.g., 7024L35J8), which specifies 2V data retention with typical current draw of 100–4000 µA. The 'S' in 7024S35J8 indicates standard power grade, with standby current of 5 mW typical at 5V.
How is master/slave configuration implemented on the 7024S35J8?
Master/slave configuration is controlled by the M/S pin: when pulled high, the device operates as Master with BUSYR/BUSYL asserted as outputs; when pulled low, it operates as Slave with BUSYR/BUSYL accepting inputs. This enables automatic port arbitration in cascaded systems without external logic-confirmed in Truth Table I and Pin Name table.
What package type does the 7024S35J8 use, and is it RoHS-compliant?
The 7024S35J8 uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, denoted by the 'J8' suffix. Per IDT documentation and ordering information, this variant is green-part compliant-meaning it meets RoHS Directive 2011/65/EU requirements with lead-free terminations and halogen-free molding compound.
Can the 7024S35J8 perform simultaneous reads from both ports to the same memory address?
Yes, the 7024S35J8 features true dual-ported memory cells that allow fully asynchronous, simultaneous reads from identical addresses on the left and right ports-without contention, delay, or data corruption. This is explicitly stated in the Features section and confirmed by the Functional Block Diagram showing independent I/O Control and Address Decoder paths per port.
7024S35J8 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:
- 35ns
- Access Time:
- 35 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)
7024S35J8 FAQ
1.How can I place an order for 7024S35J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S35J8 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 7024S35J8 reliable?
The price and inventory of 7024S35J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S35J8 is usually 5 days.
3.What payment methods are accepted for 7024S35J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S35J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S35J8?
7024S35J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S35J8 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 7024S35J8?
For technical support, including 7024S35J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S35J8 requirements.
6.How does Aetrix verify that 7024S35J8 is sourced from the original manufacturer or authorized distributors?
All 7024S35J8 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 7024S35J8 meets industry standards.
7.What is the process for return or replacement of 7024S35J8?
All 7024S35J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7024S35J8, 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 7024S35J8 part is unused and in its original packaging.
Return procedure for 7024S35J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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