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Renesas 7024S45J
- Part No.:
- 7024S45J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S45J.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,855
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Product details
Overview
7024S45J 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), 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 inter-processor communication systems.
For engineers reviewing the 7024S45J datasheet, 7024S45J pinout, 7024S45J application, or 7024S45J equivalent, key selection considerations include BUSY flag timing (tBAA ≤ 45 ns), dual-port contention resolution via hardware semaphore, battery-backed data retention at 2V (L-version only), and compatibility with 84-pin PGA, PLCC, Flatpack, or 100-pin TQFP packages.
Technical Context
The 7024S45J implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling concurrent reads/writes without external arbitration logic. Its on-chip port arbitration resolves contention via BUSY flag assertion and supports semaphore signaling across ports using dedicated SEM pins and A0–A2 address lines.
It features two independent chip enable (CEL/CER), byte enable (UBL/UBR, LBL/LBR), and read/write (R/WL/R/WR) controls per port, plus interrupt flags (INTL/INTR) and master/slave select (M/S) for cascaded configurations. The device operates in commercial temperature range (0°C to +70°C) and meets TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 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 |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no auxiliary supplies required |
| Operating Temperature | 0°C to +70°C - commercial grade; validated for stable timing across full range |
| Standby Current (ISB3) | 0.2 mA typical - ultra-low power CMOS-level full standby mode with CE high |
| Data Retention | 2 V minimum - supports battery backup operation (L-version); S-version not rated |
| I/O Interface | TTL-compatible inputs/outputs - direct interfacing with 5V microcontrollers and FPGAs |
Pinout & Package
7024S45J is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), with all VCC and GND pins requiring proper decoupling. Pin functions are strictly defined per port: left port (L) and right port (R) each have dedicated address (A0L–A11L / A0R–A11R), data (I/O0L–I/O15L / I/O0R–I/O15R), and control (CEL/CER, R/WL/R/WR, OEL/OER, UBL/UBR, LBL/LBR, SEML/SEMR, INTL/INTR, BUSYL/BUSYR) signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable for respective port; disables I/O drivers and reduces current draw when high |
| R/WL / R/WR | Read/Write Control (Left / Right) | Low = write, high = read; determines direction of data flow on associated I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low control for output drivers; allows high-impedance tri-state during writes or bus sharing |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enable 8-bit granularity access; permits multiplexed bus compatibility and partial-word transfers |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register (addressed by A0–A2); used for inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | M/S = H → BUSY is output flag; M/S = L → BUSY is input handshake for slave arbitration |
| M/S | Master/Slave Select | Configures device role in cascaded systems; enables automatic port arbitration without external logic |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write access to identical memory locations - eliminates software polling or lock-step coordination |
| Hardware Semaphore Logic | On-chip 8-bit semaphore register with atomic read/write via SEM pins - enables deterministic resource locking between processors |
| Automatic Port Arbitration | Dedicated BUSY flag generation and detection - resolves contention within 45 ns (tBAA), preventing data corruption during overlapping accesses |
| Master/Slave Cascading Support | Single M/S pin configures role; multiple devices expand data bus width to 32-bit+ without discrete glue logic |
| Low-Power Standby Mode | 0.2 mA typical ISB3 current with CMOS-level inputs - extends system battery life in always-on embedded applications |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Buffering |
|---|---|
|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands with zero-latency handshaking. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore and BUSY arbitration ensures deterministic, collision-free access. Use Value: Eliminates need for UART/SPI bridging or software mutexes; sustains 22.2 MB/s throughput (1/45 ns × 16 bits). |
Use Scenario: An FPGA-based FFT engine streams time-domain samples to a DSP core for spectral analysis. IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong buffer - one port writes incoming samples while the other reads processed blocks. Use Value: Enables continuous data flow without pipeline stalls; 45 ns tRC supports >22 MHz sample rates with 16-bit precision. |
| Industrial PLC Memory Expansion | Avionics Data Acquisition Interface |
|
Use Scenario: Legacy PLC CPU upgrades require wider data path without redesigning backplane or firmware. IC Role / Device Role / Timing Role: Master/Slave configuration expands 16-bit bus to 32-bit using two 7024S45J devices with synchronized CE timing. Use Value: Achieves full-speed error-free operation at 45 ns cycle time - no additional discrete logic or timing compensation needed. |
Use Scenario: Flight control computer acquires analog sensor data and stores timestamped telemetry for post-flight diagnostics. IC Role / Device Role / Timing Role: Left port captures ADC data under DMA; right port serves telemetry packets to communication subsystem. Use Value: Hardware semaphore prevents race conditions during concurrent access; 2V data retention preserves critical logs during brownout events. |
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, 4K × 16, 3.3V core (5V-tolerant I/O), -40°C to +85°C industrial temp | Requires level-shifting for pure 5V systems; better suited for mixed-voltage designs with lower power budgets | Select when migrating to 3.3V infrastructure or needing extended temperature range beyond commercial spec |
| IDT70V24S45PF | 45 ns tRC, 4K × 16, 3.3V supply, LVCMOS interface, 100-pin TQFP only | Not pin-compatible; lacks M/S and BUSY logic - requires external arbitration for multi-device systems | Choose for new 3.3V designs prioritizing lower active power (120 mW vs. 750 mW) and smaller footprint |
Compared with CY7C024AV-45AXC and IDT70V24S45PF, the 7024S45J delivers native 5V TTL compatibility, integrated master/slave arbitration, and commercial-grade cost optimization - making it optimal for legacy 5V controller interfaces where pin-for-pin upgrade simplicity and hardware semaphore are essential.
Availability
7024S45J is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and industrial PLC memory expansion requiring stable component supply across long production lifecycles.
Supply support for 7024S45J 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 for communications, computing, and industrial markets.
The 7024S45J belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency shared-memory architectures in real-time embedded systems where hardware arbitration and bus-width scalability are critical.
FAQ
What is the maximum operating speed of the 7024S45J?
The 7024S45J has a maximum read cycle time (tRC) of 45 ns, supporting sustained memory access rates up to 22.2 MHz. This timing is guaranteed across the commercial temperature range (0°C to +70°C) with VCC = 5.0 V ±10%, and applies to both ports independently under fully asynchronous operation.
Does the 7024S45J support battery backup for data retention?
No - the 7024S45J is the 'S' (standard power) variant and does not support 2V data retention. Only the 'L' (low-power) version (e.g., 7024L45J) guarantees data retention at 2V. The 7024S45J requires continuous 5V supply for volatile operation.
How does the M/S pin affect BUSY signal behavior in the 7024S45J?
When M/S = HIGH, the 7024S45J operates as a master and drives BUSYL/BUSYR as output flags indicating port contention. When M/S = LOW, it acts as a slave and accepts BUSY as input signals for handshake-based arbitration - enabling seamless cascading without external logic.
Can the 7024S45J be used in a single-port configuration?
Yes - either port (left or right) can be used independently by tying unused control signals (e.g., CER, R/WR, OER) to inactive states. The unused port enters low-power standby (ISB1 ≤ 20 mA), and the active port retains full 45 ns performance with standard SRAM timing.
What package options are available for the 7024S45J?
The 7024S45J is offered in 84-pin PLCC (plastic leaded chip carrier), 84-pin PGA (pin grid array), 84-pin Flatpack, and 100-pin TQFP. The PLCC variant is most common for through-hole prototyping and industrial PCBs requiring mechanical robustness and thermal stability.
7024S45J 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:
- 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)
7024S45J FAQ
1.How can I place an order for 7024S45J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S45J 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 7024S45J reliable?
The price and inventory of 7024S45J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S45J is usually 5 days.
3.What payment methods are accepted for 7024S45J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S45J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S45J?
7024S45J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S45J 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 7024S45J?
For technical support, including 7024S45J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S45J requirements.
6.How does Aetrix verify that 7024S45J is sourced from the original manufacturer or authorized distributors?
All 7024S45J 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 7024S45J meets industry standards.
7.What is the process for return or replacement of 7024S45J?
All 7024S45J units undergo pre-shipment inspection (PSI). If there is an issue with 7024S45J, 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 7024S45J part is unused and in its original packaging.
Return procedure for 7024S45J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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