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Renesas 7024S35JI8
- Part No.:
- 7024S35JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S35JI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
7024S35JI8 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-designed for real-time inter-processor communication in embedded control systems.
For engineers reviewing the 7024S35JI8 datasheet, 7024S35JI8 pinout, 7024S35JI8 application, or 7024S35JI8 equivalent, this page delivers verified specifications, package mapping to 84-pin PLCC, dual-port timing behavior, battery-backed data retention at 2V, and validated alternatives for master/slave memory expansion in 32-bit bus architectures.
Technical Context
The 7024S35JI8 implements fully asynchronous dual-port access with separate address, control, and I/O buses per port, enabling simultaneous reads from identical memory locations. Its on-chip arbitration logic resolves contention via BUSY flag signaling and supports both master (BUSY output) and slave (BUSY input) configurations using the M/S pin.
It integrates full hardware semaphore support across eight flags (addressed by A0–A2), with dedicated SEM, INT, and BUSY signals per port. The device operates in two power modes: active (750 mW typ.) and standby (5 mW typ. for S-version), with data retention down to 2V for battery backup operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time | 35 ns - defines minimum clock period for reliable read operations in commercial systems |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no auxiliary supplies required |
| Operating Temperature | –40°C to +85°C - industrial-grade thermal range confirmed for this variant |
| Standby Current | 5 mW typical - enables low-power hold mode during processor idle cycles |
| Data Retention Voltage | 2.0 V minimum - supports nonvolatile backup using coin-cell or supercapacitor |
| Package | 84-pin PLCC (Plastic Leaded Chip Carrier) - surface-mount, leaded, RoHS-compliant |
Pinout & Package
7024S35JI8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), with body dimensions approximately 1.15 in × 1.15 in × 0.17 in. All VCC and GND pins must be externally decoupled per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; controls port activation and power-down entry |
| R/WL / R/WR | Read/Write Control (Left/Right) | Determines direction of data transfer; high = read, low = write |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O drivers independently per port during read operations |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-level writes to I/O[15:8] or I/O[7:0], supporting multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Activates on-chip semaphore register access (A0–A2 addressable) for inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | Indicates port contention; M/S = H configures BUSY as output (master), L configures as input (slave) |
| INTL / INTR | Interrupt Flag | Push-pull output asserting on semaphore state change or arbitration event |
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit address bus per port; supports full 4K address space (0x000–0xFFF) |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left/Right) | 16-bit bidirectional data bus per port; true dual-port allows concurrent read/write to same location |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent access from two processors without external arbitration logic |
| On-Chip Semaphore Logic | Eight hardware semaphore flags (A0–A2 addressed) eliminate need for software locks or external latches |
| Master/Slave Cascading Support | M/S pin configures BUSY as output (master) or input (slave), enabling seamless 32-bit+ word expansion |
| Battery Backup Data Retention | Retains valid data at 2V supply-critical for fail-safe state preservation during main power loss |
| Industrial Temperature Range | Rated –40°C to +85°C-validated for deployment in motor drives, PLCs, and transportation control units |
Applications
| Industrial Motion Controller | Avionics Data Exchange Module |
|---|---|
|
Use Scenario: Two microcontrollers coordinate real-time servo positioning and safety monitoring in a CNC axis drive. IC Role / Device Role / Timing Role: 7024S35JI8 serves as shared memory buffer with hardware semaphore for atomic flag exchange and BUSY-driven write coordination. Use Value: Eliminates polling delays and race conditions; 35 ns access ensures sub-microsecond inter-processor handshaking. |
Use Scenario: Flight management unit (FMU) and display processing unit (DPU) exchange telemetry and command packets over ARINC-429 interface. IC Role / Device Role / Timing Role: 7024S35JI8 acts as dual-port FIFO with interrupt-driven semaphore signaling to synchronize packet readiness. Use Value: Guarantees deterministic latency (<35 ns) and avoids bus contention without FPGA glue logic. |
| Telecom Line Card Buffer | Medical Imaging Subsystem |
|
Use Scenario: DSP and ARM host processor share image preprocessing results in a 10Gbps optical line card. IC Role / Device Role / Timing Role: 7024S35JI8 provides 64Kbit scratchpad memory with byte-select writes for partial frame updates. Use Value: UBL/LBR enables efficient 8-bit transfers aligned to DSP word boundaries; 5 mW standby reduces thermal load. |
Use Scenario: MRI subsystem uses two FPGAs to acquire and reconstruct k-space data in parallel pipelines. IC Role / Device Role / Timing Role: 7024S35JI8 functions as synchronized dual-port buffer with BUSY flag arbitration during raw ADC data handoff. Use Value: Hardware arbitration prevents data corruption during simultaneous read/write; 2V retention preserves calibration data during power cycling. |
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-35JC | 35 ns access, 4K × 16, 3.3V core (5V-tolerant I/O), 100-pin TQFP only | Requires level-shifting for legacy 5V systems; lower active power but no 2V data retention | Select when migrating to 3.3V infrastructure and board redesign is feasible |
| IDT70V24S35PF8 | 35 ns, 4K × 16, 3.3V supply, 84-pin PLCC, LVDS-compatible outputs | Not pin-compatible; incompatible voltage domain and signaling-requires PCB redesign | Choose for new designs targeting lower EMI and reduced power, not drop-in replacement |
Compared with CY7C024AV-35JC and IDT70V24S35PF8, the 7024S35JI8 uniquely supports direct 5V TTL interfacing, industrial temperature operation, and 2V battery-backed data retention-making it irreplaceable in legacy-reliant, fail-safe, or mixed-voltage embedded systems where pin compatibility and retention capability are mandatory.
Availability
7024S35JI8 is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data exchange modules, and telecom line card buffers requiring stable component supply across extended product lifecycles.
Supply support for 7024S35JI8 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 sensor solutions, now part of Renesas Electronics.
The 7024S35JI8 belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic inter-processor communication in real-time embedded systems demanding zero-latency arbitration and robust data integrity.
FAQ
What is the operating temperature range for the 7024S35JI8?
The 7024S35JI8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its "I" suffix and datasheet specification tables. This range applies to all DC and AC parameters including 35 ns access time, standby current, and data retention behavior-making it suitable for harsh-environment applications like factory automation and transportation electronics.
Does the 7024S35JI8 support battery backup operation?
Yes, the 7024S35JI8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum. In this mode, ICCDR is specified at ≤4000 µA (military/industrial) and ≤1500 µA (commercial), enabling use with primary lithium or supercapacitor backup sources without external regulators or switches.
Is the 7024S35JI8 pin-compatible with other IDT7024 variants?
Yes-the 7024S35JI8 shares identical 84-pin PLCC pinout with all IDT7024 family members (e.g., 7024S20JI8, 7024L35JI8), including identical signal assignments for CEL/CER, R/WL/R/WR, BUSYL/BUSYR, and SEM/INT pins. Only speed grade and power version (S vs L) differ; no PCB changes are needed when substituting within same package.
How does the BUSY arbitration work between master and slave configurations of the 7024S35JI8?
In master configuration (M/S = H), BUSYL/BUSYR are outputs that assert when the opposite port attempts conflicting access; in slave configuration (M/S = L), BUSYL/BUSYR become inputs monitored by external logic. The 7024S35JI8 uses tBDD timing (≤30 ns) to ensure valid data appears after BUSY deassertion-enabling deterministic resolution of port-to-port write contention.
Can the 7024S35JI8 be used in a 32-bit data bus system?
Yes-the 7024S35JI8 supports 32-bit expansion via master/slave cascading: one device configured as master (M/S = H) provides BUSY output, while a second as slave (M/S = L) accepts that BUSY signal. This eliminates external arbitration logic and maintains full 35 ns performance across both 16-bit segments-verified in IDT application note AN-124.
7024S35JI8 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7024S35JI8 FAQ
1.How can I place an order for 7024S35JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S35JI8 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 7024S35JI8 reliable?
The price and inventory of 7024S35JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S35JI8 is usually 5 days.
3.What payment methods are accepted for 7024S35JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S35JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S35JI8?
7024S35JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S35JI8 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 7024S35JI8?
For technical support, including 7024S35JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S35JI8 requirements.
6.How does Aetrix verify that 7024S35JI8 is sourced from the original manufacturer or authorized distributors?
All 7024S35JI8 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 7024S35JI8 meets industry standards.
7.What is the process for return or replacement of 7024S35JI8?
All 7024S35JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7024S35JI8, 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 7024S35JI8 part is unused and in its original packaging.
Return procedure for 7024S35JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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