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Renesas 7024L45J8
- Part No.:
- 7024L45J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024L45J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,333
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Product details
Overview
7024L45J8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 45 ns maximum read cycle time (tRC), 2V data retention capability, and full 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 7024L45J8 datasheet, 7024L45J8 pinout, 7024L45J8 application, or 7024L45J8 equivalent, this page delivers verified timing specs, master/slave port arbitration behavior, battery-backed standby operation, and package-specific pin mapping for PLCC-84 implementation in embedded control and military-grade avionics interfaces.
Technical Context
The 7024L45J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations to the same memory location. Its on-chip arbitration logic resolves contention via BUSY flag signaling and supports semaphore flag management across both ports using A0–A2 addressing.
It operates at 5.0 V ±10% with TTL-compatible inputs/outputs, features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility, and enters ultra-low-power standby (1 µA typical) when chip enable is deasserted - critical for battery-backed systems requiring persistent data retention down to 2 V.
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 (tRC) | 45 ns - defines minimum time between successive read operations on same port |
| Data Retention Voltage | 2.0 V - enables reliable non-volatile storage during main power loss, e.g., backup battery mode |
| Standby Current (ISB3) | 0.2 µA typical - ultra-low power consumption when both ports fully disabled with CMOS-level inputs |
| Operating Temperature | –40°C to +85°C - industrial-grade thermal range suitable for ruggedized embedded systems |
| Supply Voltage | 4.5 V to 5.5 V - single 5 V rail compatible with legacy TTL and mixed-signal designs |
| Package | 84-pin PLCC - surface-mountable, hermetically sealed, with standardized footprint for PCB layout reuse |
Pinout & Package
7024L45J8 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 standard JEDEC MO-047A outline. Pin 1 marked by notch or dot; pin numbering clockwise from notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables memory array access per port; controls power-down entry when high |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; high = read mode; determines direction of data flow on I/O pins |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; allows tri-state control independent of R/W state |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select (Left / Right) | Enable 8-bit granularity writes/reads; essential for multiplexed 16-bit bus interfacing |
| SEML / SEMR | Semaphore Enable (Left / Right) | Activates 3-bit semaphore register access (A0–A2); enables inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull output (Master) or input (Slave); signals port contention during simultaneous access |
| INTL / INTR | Interrupt Flag (Left / Right) | Push-pull output indicating semaphore or arbitration event; triggers host processor interrupt |
| M/S | Master/Slave Select | High = BUSY output (Master); Low = BUSY input (Slave); enables cascaded multi-device configurations |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit address bus per port; selects one of 4K locations; no internal address latching |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data bus per port; supports simultaneous reads from same location |
| VCC / GND | Power / Ground | Multiple distributed VCC/GND pins ensure low-noise operation and stable decoupling |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous read operations from both ports to identical addresses - eliminates arbitration delay in lock-step processors |
| On-Chip Semaphore Logic | Eight dedicated hardware semaphore flags accessible via A0–A2; enables deterministic resource locking without software overhead |
| Full Hardware Port Arbitration | Automatic BUSY assertion/resolution during address contention; removes need for external priority encoder or glue logic |
| Battery Backup Data Retention | Retains valid data at 2 V supply - supports seamless transition to backup power in mission-critical systems |
| Separate Byte Enables | Independent UBL/LBL and UBR/LBR controls allow 8-bit sub-word writes - essential for byte-aligned peripheral interfacing |
Applications
| Avionics Flight Control System | Digital Signal Processor (DSP) Co-Processor Interface |
|---|---|
|
Use Scenario: Real-time exchange of sensor fusion data and actuator commands between dual-redundant flight computers. IC Role / Device Role / Timing Role: Shared memory buffer with deterministic arbitration ensuring no data loss during simultaneous read/write bursts. Use Value: Eliminates external arbitration logic and guarantees sub-45 ns memory access latency required for 20 kHz control loop execution. |
Use Scenario: High-bandwidth data handoff between a main CPU and offload DSP performing FFT-based radar signal processing. IC Role / Device Role / Timing Role: Dual-port SRAM acting as zero-wait-state scratchpad memory accessible concurrently by both processors. Use Value: Enables full 16-bit parallel transfer at 22 MHz sustained rate without pipeline stalls or bus contention penalties. |
| Industrial PLC Redundancy Module | Military Radios with Dual-Channel Modems |
|
Use Scenario: Synchronized state mirroring between active and standby programmable logic controllers during hot failover. IC Role / Device Role / Timing Role: Non-volatile shared memory holding configuration, I/O status, and runtime variables with automatic semaphore coordination. Use Value: Achieves <100 µs switchover time via hardware semaphore handshake - meets SIL-3 functional safety requirements. |
Use Scenario: Concurrent baseband processing and RF channel management in secure HF/VHF software-defined radios. IC Role / Device Role / Timing Role: Inter-processor memory bridge between modem controller and encryption engine with guaranteed atomic flag updates. Use Value: Supports MIL-STD-188-110B waveform switching within 500 µs using hardware semaphore-controlled context swap. |
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-45AXC | 45 ns tRC, 5 V, 4K × 16, but uses 100-pin TQFP; no M/S pin - requires external arbitration for master/slave cascading | Lacks integrated BUSY flag arbitration; suited for point-to-point dual-CPU links, not multi-drop configurations | Select when board space permits larger package and system design avoids cascaded dual-port expansion. |
| IDT70V24L25PFI | 25 ns tRC, 3.3 V core, 4K × 16, 84-pin PLCC; lower voltage reduces power but requires level-shifting for 5 V systems | Higher speed enables tighter timing margins but incompatible with legacy 5 V-only designs without interface translation. | Choose for new 3.3 V platforms where 25 ns access and 1.5 W active power justify redesign effort. |
Compared with CY7C024AV-45AXC and IDT70V24L25PFI, the 7024L45J8 uniquely combines 5 V TTL compatibility, M/S-configurable arbitration, and 2 V data retention in an industry-standard PLCC-84 - making it irreplaceable in field-upgraded industrial and defense systems constrained by voltage, package, and legacy interface requirements.
Availability
7024L45J8 is available at Aetrix Electronics and suitable for avionics flight control systems, industrial PLC redundancy modules, military SDR radio interfaces, and DSP co-processor bridges requiring stable component supply across extended product lifecycles.
Supply support for 7024L45J8 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 engineered for deterministic real-time inter-processor communication in aerospace, defense, and industrial automation - prioritizing hardware arbitration, data integrity under power loss, and drop-in replaceability in legacy 5 V systems.
FAQ
What is the maximum operating temperature range for the 7024L45J8?
The 7024L45J8 is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in the Absolute Maximum Ratings table and supported across all AC/DC specifications in the datasheet. It does not support military-grade –55°C to +125°C operation - that rating applies only to specific 7024X70 variants with different suffixes.
Does the 7024L45J8 support true simultaneous read access to the same memory location from both ports?
Yes, the 7024L45J8 implements true dual-port SRAM cells that allow concurrent read operations from both left and right ports to identical addresses without contention or data corruption. This behavior is explicitly stated in the Features section and validated by the Functional Block Diagram showing independent I/O control paths.
How does the M/S pin affect BUSY signal behavior on the 7024L45J8?
When M/S = HIGH, the 7024L45J8 operates as Master: BUSYL and BUSYR become push-pull outputs asserting during port contention. When M/S = LOW, it operates as Slave: BUSYL and BUSYR become inputs, allowing external BUSY signals from a Master device to gate local write operations - enabling scalable multi-device memory expansion.
What is the minimum supply voltage required to retain data in the 7024L45J8?
The 7024L45J8 retains valid data down to 2.0 V (VDR), as specified in Table 10 (Data Retention Characteristics). This 2 V retention threshold is exclusive to the "L" (low-power) variant and is measured with CE > VHC and inputs held at valid logic levels - enabling reliable battery backup operation during main power interruption.
Which package type is used by the 7024L45J8, and how is pin 1 identified?
The 7024L45J8 uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG84 in IDT documentation. Pin 1 is identified by a notch in the package body or a molded dot adjacent to the corner; pin numbering proceeds clockwise around the perimeter starting from pin 1.
7024L45J8 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:
- 45ns
- Access Time:
- 45 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)
7024L45J8 FAQ
1.How can I place an order for 7024L45J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024L45J8 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 7024L45J8 reliable?
The price and inventory of 7024L45J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024L45J8 is usually 5 days.
3.What payment methods are accepted for 7024L45J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024L45J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024L45J8?
7024L45J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024L45J8 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 7024L45J8?
For technical support, including 7024L45J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024L45J8 requirements.
6.How does Aetrix verify that 7024L45J8 is sourced from the original manufacturer or authorized distributors?
All 7024L45J8 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 7024L45J8 meets industry standards.
7.What is the process for return or replacement of 7024L45J8?
All 7024L45J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7024L45J8, 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 7024L45J8 part is unused and in its original packaging.
Return procedure for 7024L45J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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