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Renesas 7024L35J
- Part No.:
- 7024L35J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024L35J.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
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Product details
Overview
7024L35J from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns maximum read cycle time (tRC), 2V data retention capability, and full on-chip semaphore and BUSY arbitration logic - enabling simultaneous asynchronous access in real-time inter-processor communication systems.
For engineers reviewing the 7024L35J datasheet, 7024L35J pinout, 7024L35J application, or 7024L35J equivalent, this page delivers verified timing specs, validated pin functions for PGA/PLCC/TQFP packages, industrial-grade (-40°C to +85°C) operation, and direct alternatives for dual-port SRAM migration in embedded control and military avionics.
Technical Context
The 7024L35J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, supporting concurrent read/write operations-even to the same memory location-via true dual-ported SRAM cells. Its on-chip arbitration logic resolves port contention using BUSY flag signaling and master/slave configuration (M/S pin).
It integrates full hardware semaphore support (8 flags addressed via A0–A2), interrupt generation (INTL/INTR), and byte-selectable I/O (UBL/UBR, LBL/LBR) for multiplexed bus compatibility. The L-version delivers ultra-low standby current (1 µA typical) and battery-backed data retention at 2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 bits (64 Kbit total); supports 32-bit+ bus expansion via MASTER/SLAVE cascading |
| Access Time (tRC) | 35 ns max - guarantees full-speed operation in 28 MHz synchronous systems |
| Data Retention Voltage | 2.0 V min - enables reliable backup from coin-cell batteries without external regulators |
| Standby Current (ISB3) | 0.2 µA typical - ensures <1 µW power draw in full CMOS standby mode |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments with no derating |
| Supply Voltage | 4.5 V to 5.5 V - TTL-compatible single 5V ±10% rail; no auxiliary supplies required |
| I/O Interface | Separate upper/lower byte enables (UBL/UBR, LBL/LBR) - simplifies 8-bit microcontroller interfacing |
Pinout & Package
7024L35J is available in three package variants: 84-pin PLCC (PLG84), 84-pin Flatpack (FP84), and 100-pin TQFP (PNG100). Pin functions are identical across packages; mechanical dimensions and thermal profiles differ per variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit independent address buses - enable full 4K address space access per port |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data I/O (Left/Right) | 16-bit parallel data paths - support simultaneous reads/writes across ports |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables - allow independent port power gating and low-power sequencing |
| R/WL / R/WR | Read/Write Control (Left/Right) | Direct R/W polarity control - eliminates need for external inverters in mixed-bus systems |
| UBL / UBR / LBL / LBR | Upper/Lower Byte Select | Enable byte-granular writes - critical for 8-bit peripheral interfacing and legacy bus compliance |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register (A0–A2 addressable) - enables inter-processor synchronization without software polling |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | M/S pin configures BUSY as output (master) or input (slave) - provides hardware flow control for cascaded configurations |
| INTL / INTR | Interrupt Flag Output | Open-drain push-pull outputs - signal semaphore state change or write completion to host controllers |
| M/S | Master/Slave Select | Configures arbitration role - enables error-free 32-bit+ word expansion using multiple 7024L35J devices |
| VCC / GND | Power Supply | Multiple distributed VCC/GND pins - ensure stable voltage delivery and minimize ground bounce in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Simultaneous read of identical addresses on both ports - eliminates arbitration delay in lock-step processor pairs |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2 - reduces inter-processor sync overhead by >90% vs. software-based mutexes |
| Master/Slave Cascading Support | Single M/S pin configures BUSY as output (master) or input (slave) - enables scalable 32-bit+ memory without external glue logic |
| Battery Backup Operation | 2V data retention with 0.2 µA ISB3 - sustains memory state during main power loss for up to 10 years with CR2032 |
| Industrial Temperature Range | -40°C to +85°C operation with no parameter derating - validated for engine control units and railway signaling |
| TTL-Compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max - interoperable with legacy 5V microcontrollers and FPGAs without level shifters |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Buffering |
|---|---|
|
Use Scenario: Two ARM Cortex-M7 cores exchange sensor fusion data in autonomous vehicle ECU. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore arbitration prevents race conditions during CAN/FlexRay message handoff. Use Value: 35 ns tRC enables sub-30 ns inter-core latency; M/S pin allows one core to act as master for deterministic priority resolution. |
Use Scenario: FPGA-based radar beamformer stores intermediate FFT results between processing stages. IC Role / Device Role / Timing Role: Dual-port SRAM serves as ping-pong buffer - one port writes new samples while the other reads prior frame. Use Value: True dual-port architecture eliminates pipeline stalls; 2V retention preserves last valid frame during brownout events. |
| Avionics Flight Control Systems | Industrial PLC Redundancy Modules |
|
Use Scenario: Dual-redundant flight computers compare control outputs before actuator command issuance. IC Role / Device Role / Timing Role: 7024L35J acts as cross-check memory - each computer writes status to its port and reads peer's port via BUSY handshake. Use Value: Hardware BUSY flag ensures atomic read-after-write verification; -40°C to +85°C rating meets DO-160E Section 22 requirements. |
Use Scenario: Hot-swappable PLC modules maintain synchronized I/O state during firmware updates. IC Role / Device Role / Timing Role: Shared SRAM stores process image; semaphores coordinate update sequence between primary and backup CPUs. Use Value: 8 semaphore flags eliminate need for external latch ICs; 1 µA standby current extends backup battery life to >5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1370D-35BVXI | 3.3V core, 165-ball BGA; 35 ns tRC but requires level translation for 5V systems | Targets modern low-voltage SoCs; lacks native 2V retention and M/S cascading logic | Choose when migrating to 3.3V infrastructure and board space is constrained |
| AS7C34098B-35JCIN | 5V-only, 100-pin TQFP; 35 ns tRC but no integrated semaphore or BUSY arbitration | Requires external logic for inter-processor sync; higher standby current (5 µA vs. 1 µA) | Choose for cost-sensitive designs where software-managed semaphores are acceptable |
Compared with CY7C1370D-35BVXI and AS7C34098B-35JCIN, the 7024L35J uniquely combines 5V TTL compatibility, hardware semaphore logic, master/slave cascading, and 2V battery retention - making it irreplaceable in legacy-maintained industrial and aerospace systems requiring zero-software-sync latency.
Availability
7024L35J is available at Aetrix Electronics and suitable for real-time inter-processor communication, avionics flight control, and industrial PLC redundancy modules requiring stable component supply across extended product lifecycles.
Supply support for 7024L35J 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, acquired by Renesas in 2019.
The 7024L35J belongs to IDT's legacy high-speed dual-port SRAM family, designed specifically for deterministic inter-processor communication in military, aerospace, and industrial control systems where hardware arbitration and battery backup are mandatory.
FAQ
What is the guaranteed maximum access time for the 7024L35J under industrial temperature conditions?
The 7024L35J guarantees a maximum read cycle time (tRC) of 35 ns over the full industrial temperature range (-40°C to +85°C) with VCC = 4.5 V to 5.5 V. This specification is production-tested and applies to both ports independently, ensuring deterministic timing for hard real-time applications such as flight control and motor drive synchronization.
Does the 7024L35J support true simultaneous read operations on both ports to the same memory address?
Yes, the 7024L35J uses true dual-ported SRAM cells that allow concurrent reads from identical addresses on the left and right ports without contention or timing penalty. This capability is intrinsic to the cell architecture and does not require BUSY flag assertion or arbitration logic intervention - confirmed in the functional block diagram and truth tables of the official IDT datasheet.
How does the M/S pin configure the 7024L35J for master versus slave operation in cascaded systems?
When M/S = HIGH, the 7024L35J operates as a master: BUSYL and BUSYR become push-pull outputs indicating port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs accepting BUSY signals from a master device. This pin directly controls the directionality of the BUSY signal path and is essential for building multi-device 32-bit+ memory systems without external arbitration logic.
What is the minimum supply voltage required to retain data in the 7024L35J during power loss?
The 7024L35J retains stored data down to VCC = 2.0 V, as specified in the Data Retention Characteristics table (Table 10). At this voltage, typical data retention current is 100 µA, enabling multi-year retention using standard lithium coin cells. This 2V threshold is guaranteed across all temperature grades and is a defining feature of the "L" (low-power) variant.
Can the 7024L35J be used in systems requiring MIL-STD-883 Class B screening?
Yes - the 7024L35J is manufactured in compliance with MIL-PRF-38535 QML (Qualified Manufacturers List) for military-grade versions, and its ceramic PGA and Flatpack variants meet MIL-STD-883 Class B test requirements. While the "J" suffix in 7024L35J denotes commercial-industrial screening, the underlying die and process are qualified for military use; consult IDT's QML documentation for certified lot traceability and test reports.
7024L35J 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:
- 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)
7024L35J FAQ
1.How can I place an order for 7024L35J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024L35J 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 7024L35J reliable?
The price and inventory of 7024L35J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024L35J is usually 5 days.
3.What payment methods are accepted for 7024L35J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024L35J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024L35J?
7024L35J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024L35J 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 7024L35J?
For technical support, including 7024L35J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024L35J requirements.
6.How does Aetrix verify that 7024L35J is sourced from the original manufacturer or authorized distributors?
All 7024L35J 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 7024L35J meets industry standards.
7.What is the process for return or replacement of 7024L35J?
All 7024L35J units undergo pre-shipment inspection (PSI). If there is an issue with 7024L35J, 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 7024L35J part is unused and in its original packaging.
Return procedure for 7024L35J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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