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Renesas 7024S17JI8
- Part No.:
- 7024S17JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S17JI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,554
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Product details
Overview
7024S17JI8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 17 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 embedded systems.
For engineers reviewing the 7024S17JI8 datasheet, 7024S17JI8 pinout, 7024S17JI8 application, or 7024S17JI8 equivalent, key selection considerations include its 17 ns commercial-grade timing, dual-port arbitration behavior, BUSY flag signaling, battery-backed data retention at 2V (L-version), and compatibility with 84-pin PLCC packaging for legacy industrial control designs.
Technical Context
The 7024S17JI8 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 assertion and supports semaphore signaling using dedicated SEM pins and A0–A2 address lines.
It features full hardware semaphore support with eight flags accessible via I/O0–I/O15, and operates across commercial temperature range (0°C to +70°C) with 5V ±10% supply. The device uses CMOS technology and provides two standby modes: TTL-level (ISB1 = 20 mA typ.) and CMOS-level (ISB3 = 1.0 mA typ.) for power optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent left/right access paths |
| Access Time (tRC) | 17 ns max - defines minimum read cycle interval for guaranteed timing compliance in 55 MHz-equivalent systems |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single-supply operation; no mixed-voltage interface required |
| Operating Temperature | 0°C to +70°C - commercial grade; validated for non-extended ambient environments |
| Standby Current (ISB3) | 1.0 mA typ. - ultra-low power mode enabled when both chip enables are held high and inputs are CMOS-leveled |
| Data Retention | 2 V min - supports battery backup operation; retains data during main power loss without refresh |
| Package | 84-pin PLCC - surface-mount, leaded package with 1.15 in × 1.15 in footprint, suitable for reflow and wave soldering |
Pinout & Package
7024S17JI8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), with pin 1 marked by a corner notch. All VCC and GND pins must be connected per datasheet layout guidelines to ensure signal integrity and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; deassertion places port in high-impedance or standby state |
| R/WL / R/WR | Read/Write Control (Left / Right) | Low = write, high = read; controls direction of data flow on associated I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; used to gate data reads independently of R/W state |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enable byte-level writes to I/O8–I/O15 (upper) or I/O0–I/O7 (lower); supports multiplexed bus interfacing |
| SEML / SEMR | Semaphore Enable | Active-low enables semaphore register access; required for inter-port synchronization signaling |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | When M/S = H, BUSY is output indicating port contention; when M/S = L, BUSY is input for slave arbitration |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or arbitration event; requires external pull-up |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit address buses (4K depth); independent addressing allows simultaneous access to different locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data buses; true dual-port allows simultaneous read from one port and write to another |
| M/S | Master/Slave Select | High = Master (BUSY output); Low = Slave (BUSY input); determines arbitration role in cascaded configurations |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads/writes to same or different addresses without conflict or external arbitration logic |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessed via A0–A2 and I/O0; eliminates need for discrete lock registers in multi-processor systems |
| Automatic Power-Down | Chip enable (CE) control reduces active current to 1.0 mA typ. in full standby-critical for low-power embedded operation |
| MASTER/SLAVE Cascading | Supports 32-bit+ data bus expansion using M/S pin; eliminates glue logic for wide-memory system integration |
| 2V Data Retention | Maintains stored data during main power loss using backup battery; verified down to 2.0 V VCC (L-version capability) |
Applications
| Real-Time Industrial PLC | Dual-Processor Communication Buffer |
|---|---|
|
Use Scenario: Two independent CPU cores share status and command data in deterministic cycles without software locks. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer with hardware arbitration, eliminating race conditions during cross-core updates. Use Value: Enables sub-20 ns inter-processor handshaking and guarantees atomic semaphore flag updates via dedicated SEM pins. |
Use Scenario: A DSP and microcontroller exchange sensor processing results and control commands in hard real-time loop. IC Role / Device Role / Timing Role: Provides zero-wait-state memory access for both processors; BUSY flag prevents write collisions on shared address space. Use Value: Eliminates software polling overhead and ensures deterministic latency ≤17 ns for critical control path data transfers. |
| Legacy Avionics Data Logger | Redundant Control System Memory |
|
Use Scenario: Flight data recorder captures telemetry from multiple sensors while simultaneously allowing ground-test readout. IC Role / Device Role / Timing Role: Left port writes streaming sensor data; right port reads archived blocks during maintenance without interrupting capture. Use Value: Sustains continuous 55 MHz-equivalent write throughput while supporting concurrent diagnostic reads-no FIFO buffering needed. |
Use Scenario: Safety-critical rail signaling controller maintains mirrored memory images between primary and backup units. IC Role / Device Role / Timing Role: Acts as fault-tolerant memory hub where each controller accesses its own port while monitoring semaphore flags for failover coordination. Use Value: Guarantees synchronized memory state transitions via hardware semaphores-meets SIL-3 functional safety requirements. |
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-167BAXI | 167 MHz (6 ns tRC), 8K × 18 organization, 3.3 V core, LVDS-compatible I/O | Higher bandwidth and wider data bus; requires level-shifting for 5V systems | Select when migrating to modern 3.3 V architectures requiring >100 MHz throughput and larger memory depth |
| IDT70V24S15PF8 | Voltage version (3.3 V), 15 ns tRC, 100-pin TQFP, lower power (ISB3 = 0.5 mA typ.) | Not pin-compatible; smaller footprint but incompatible voltage and package | Choose for new 3.3 V designs needing faster timing and reduced board area-requires PCB redesign |
Compared with CY7C1370D-167BAXI and IDT70V24S15PF8, the 7024S17JI8 offers proven 5V TTL compatibility, 84-pin PLCC mechanical fit for legacy industrial layouts, and seamless integration into existing MASTER/SLAVE cascaded memory systems without voltage translation or layout changes.
Availability
7024S17JI8 is available at Aetrix Electronics and suitable for real-time industrial PLCs, dual-processor communication buffers, and legacy avionics data loggers requiring stable component supply and long-term obsolescence management.
Supply support for 7024S17JI8 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 7024S17JI8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency shared memory in real-time embedded systems requiring hardware arbitration and 5V interoperability.
FAQ
What is the maximum operating speed of the 7024S17JI8?
The 7024S17JI8 has a maximum read cycle time (tRC) of 17 ns, corresponding to a 58.8 MHz equivalent clock rate. This timing is specified under commercial conditions (0°C to +70°C, VCC = 5.0 V ±10%) and applies to both ports independently. The 7024S17JI8 does not require clock input-it operates asynchronously, with timing governed solely by control signal setup/hold and propagation delays.
Does the 7024S17JI8 support battery backup operation?
Yes-the 7024S17JI8 ('S' suffix) supports data retention at VCC = 2.0 V minimum, enabling battery backup functionality. While the 'L' variant is optimized for ultra-low standby current (5 µA typ.), the 7024S17JI8 retains full data integrity down to 2 V, verified per datasheet Table 10. This feature is critical for maintaining configuration or state data during main power failure in industrial controllers.
How does the BUSY flag function in MASTER/SLAVE configuration with the 7024S17JI8?
When M/S = H (Master), BUSY is an output that asserts when port contention occurs-e.g., simultaneous writes to the same address. When M/S = L (Slave), BUSY becomes an input; the master's BUSY output connects directly to the slave's BUSY input to stall its write cycle until arbitration completes. This hardware handshake ensures deterministic resolution without software intervention in the 7024S17JI8.
Can the 7024S17JI8 be used in a 32-bit data bus system?
Yes-the 7024S17JI8 supports 32-bit expansion via MASTER/SLAVE cascading. Two devices operate in tandem: the master asserts BUSY to coordinate access, while the slave responds to BUSY input. The IDT7024 family documentation confirms this topology enables full-speed, error-free 32-bit word access without external logic, making the 7024S17JI8 suitable for wide-bus legacy computing and control architectures.
What package type is used for the 7024S17JI8?
The 7024S17JI8 uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, identified by the 'J' in the suffix. This surface-mount package measures approximately 1.15 in × 1.15 in × 0.17 in and features a corner notch for pin 1 orientation. It is compatible with standard reflow and wave soldering processes and widely supported in industrial PCB assembly workflows.
7024S17JI8 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:
- 17ns
- Access Time:
- 17 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)
7024S17JI8 FAQ
1.How can I place an order for 7024S17JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S17JI8 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 7024S17JI8 reliable?
The price and inventory of 7024S17JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S17JI8 is usually 5 days.
3.What payment methods are accepted for 7024S17JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S17JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S17JI8?
7024S17JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S17JI8 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 7024S17JI8?
For technical support, including 7024S17JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S17JI8 requirements.
6.How does Aetrix verify that 7024S17JI8 is sourced from the original manufacturer or authorized distributors?
All 7024S17JI8 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 7024S17JI8 meets industry standards.
7.What is the process for return or replacement of 7024S17JI8?
All 7024S17JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7024S17JI8, 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 7024S17JI8 part is unused and in its original packaging.
Return procedure for 7024S17JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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