My Inquiry
My Account
Renesas 7024S35JI
- Part No.:
- 7024S35JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7024S35JI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,169
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7024S35JI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore signaling, and master/slave cascading for 32-bit+ bus expansion in real-time embedded control systems.
For engineers reviewing the 7024S35JI datasheet, 7024S35JI pinout, 7024S35JI application, or 7024S35JI equivalent, key selection considerations include BUSY-flag arbitration timing (tBAA ≤ 20 ns), battery-backed data retention at 2V (IDT7024L variant), and 84-pin PLCC package compatibility with legacy military/industrial PCB layouts.
Technical Context
The 7024S35JI 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 without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and supports semaphore flag exchange across ports using A0–A2 addressing.
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 dedicated interrupt (INTL/INTR) and semaphore enable (SEML/SEMR) signals. The device operates in three power states: active (750 mW typ.), standby (5 mW typ. for S version), and full standby (0.2 mA typ. with CMOS-level inputs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-ported cells enabling simultaneous reads/writes to identical addresses |
| Max Read Cycle Time (tRC) | 35 ns - defines minimum clock period for sustained random-access throughput in real-time systems |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic families and legacy 5V system rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment in motor drives and communications infrastructure |
| Active Power (typ.) | 750 mW - enables thermal management in dense memory subsystems without forced air cooling |
| Data Retention | 2 V (L version only) - supports battery backup during main power loss; not applicable to 7024S35JI (S version) |
| Package | 84-pin PLCC - surface-mount compatible with automated assembly and rework-friendly footprint |
Pinout & Package
7024S35JI is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 0.050″ lead pitch and JEDEC MO-047AC outline. Pin 1 is marked by a corner notch; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left-port address inputs | 12-bit address bus for left-side memory access; supports full 4K address space |
| A0R–A11R | Right-port address inputs | Independent 12-bit address bus enabling concurrent access from second controller or CPU core |
| I/O0L–I/O15L | Left-port bidirectional data | 16-bit data path; upper/lower byte controlled separately via UBL/LBL for multiplexed bus interfacing |
| I/O0R–I/O15R | Right-port bidirectional data | Full 16-bit parallel interface; allows independent data transfer without arbitration overhead |
| CEL / CER | Chip enable (left/right) | Asynchronous enable per port; deassertion places respective port in low-power standby mode |
| R/WL / R/WR | Read/write control (left/right) | Determines direction of data flow on each port; high = read, low = write |
| OEL / OER | Output enable (left/right) | Tri-states I/O drivers independently-critical for bus sharing and signal integrity in multi-device systems |
| UBL / UBR, LBL / LBR | Upper/lower byte select | Enables byte-level granularity for 8-bit peripheral interfacing or partial-word writes |
| SEML / SEMR | Semaphore enable | Activates 3-bit semaphore register (A0–A2) for inter-processor synchronization and resource locking |
| INTL / INTR | Interrupt flag output | Open-drain push-pull output signals semaphore state change or arbitration event to host processor |
| BUSYL / BUSYR | Busy flag (input/output) | Master: output indicates port contention; Slave: input used to stall write until master releases address |
| M/S | Master/Slave select | Configures BUSY behavior: high = BUSY output (master); low = BUSY input (slave) for daisy-chained operation |
| VCC / GND | Power supply | Multiple VCC/GND pins distributed across package for low-impedance decoupling and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory array | Enables zero-wait-state concurrent access from two independent controllers-eliminates software polling or external arbitration logic |
| On-chip semaphore logic | Eight hardware semaphore flags addressable via A0–A2 allow atomic lock/unlock operations between ports without firmware intervention |
| Master/slave cascading support | Single M/S pin configures BUSY as input or output, enabling seamless expansion to 32-bit+ data paths using multiple 7024S35JI devices |
| Asynchronous port operation | No shared clock required-ports operate at independent timing margins, simplifying integration with heterogeneous processors or FPGAs |
| Low-power standby modes | 5 mW typical standby current (S version) reduces system-level power budget in always-on industrial monitoring applications |
Applications
| Industrial Motion Control | Avionics Data Buffering |
|---|---|
|
Use Scenario: Real-time coordination between motion controller and servo drive firmware via shared memory. IC Role / Device Role / Timing Role: Dual-port RAM acts as deterministic, low-latency communication channel with 35 ns tRC ensuring sub-microsecond response to position updates. Use Value: Eliminates UART/PCIe bottlenecks and guarantees atomic semaphore-based resource locking between safety-critical firmware threads. |
Use Scenario: Buffered data exchange between flight management computer (FMC) and inertial measurement unit (IMU) in DO-254-certified avionics. IC Role / Device Role / Timing Role: Provides radiation-tolerant, non-volatile-capable memory interface with deterministic BUSY-flag arbitration for fault-isolated subsystems. Use Value: Enables lock-step synchronization and error-checked data handoff without CPU intervention-meeting ARINC 653 partitioning requirements. |
| Telecom Line Card Buffering | Test Equipment Pattern Memory |
|
Use Scenario: High-throughput packet buffering between network processor and FPGA-based traffic shaper in 10G line cards. IC Role / Device Role / Timing Role: Dual-port RAM serves as ping-pong buffer with independent read/write clocks, sustaining 28.6 MB/s (35 ns cycle) aggregate bandwidth. Use Value: Prevents packet loss under burst traffic by decoupling ingress/egress data paths with hardware-enforced mutual exclusion. |
Use Scenario: Storing stimulus/response patterns for automated test equipment (ATE) during high-speed digital IC validation. IC Role / Device Role / Timing Role: Acts as deterministic pattern store accessible simultaneously by pattern generator and comparator logic running at different clock domains. Use Value: Reduces test cycle time by enabling concurrent pattern load and result capture-no software-controlled DMA overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-55JC | 55 ns max tRC; 84-pin PLCC; 4K × 16 organization; Cypress Semiconductor; no built-in semaphore logic | Lacks on-chip semaphore and BUSY arbitration-requires external logic for inter-processor sync | Select when cost sensitivity outweighs need for hardware synchronization; verify external arbitration meets timing budget |
| AS7C34096A-35JC | 35 ns max tRC; 84-pin PLCC; 4K × 16 organization; Alliance Memory; TTL-compatible 5V supply; no M/S pin or BUSY flag | No master/slave configuration or port-to-port arbitration-suitable only for non-contention dual-access use cases | Choose for simple dual-controller buffering where address collision is prevented in software or system architecture |
Compared with CY7C133-55JC and AS7C34096A-35JC, the 7024S35JI uniquely integrates hardware semaphore signaling and configurable BUSY arbitration-reducing BOM count and improving determinism in real-time multi-processor systems.
Availability
7024S35JI is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and telecom line card buffering requiring stable component supply across extended product lifecycles.
Supply support for 7024S35JI 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 designed for deterministic, low-latency inter-processor communication in real-time embedded systems-targeting aerospace, industrial automation, and high-end test equipment where hardware-enforced synchronization is critical.
FAQ
What is the maximum operating speed of the 7024S35JI?
The 7024S35JI has a maximum read cycle time (tRC) of 35 ns, corresponding to a theoretical peak throughput of approximately 28.6 million words per second. This timing is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, making it suitable for deterministic real-time applications where worst-case latency must be bounded.
Does the 7024S35JI support battery backup for data retention?
No-the 7024S35JI is the "S" (standard power) variant and does not support battery-backed data retention. That feature is exclusive to the "L" (low-power) variant (e.g., 7024L35JI), which guarantees data retention at 2 V. The 7024S35JI consumes 5 mW in standby but requires continuous 5 V operation to maintain memory contents.
How does the M/S pin configure master/slave operation in the 7024S35JI?
When M/S = HIGH, the 7024S35JI operates as a master: BUSYL and BUSYR become outputs that assert during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs, allowing external master devices to control write arbitration. This enables cascaded configurations for wider data buses without external logic.
Can the 7024S35JI perform simultaneous read and write operations to the same memory address?
Yes-the 7024S35JI uses true dual-port SRAM cells that permit simultaneous reads from both ports to the same address. However, simultaneous writes to the same address are resolved via hardware arbitration: the port asserting BUSY first gains write priority, and the other port's write is stalled until BUSY deasserts, ensuring data coherency without software intervention.
What package type is used for the 7024S35JI and is it RoHS-compliant?
The 7024S35JI is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package per JEDEC MO-047AC. It is a green (RoHS-compliant) part, meeting lead-free soldering requirements and environmental regulations for industrial and aerospace applications-verified by IDT's ordering information and material declarations.
7024S35JI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7024S35JI FAQ
1.How can I place an order for 7024S35JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S35JI 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 7024S35JI reliable?
The price and inventory of 7024S35JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S35JI is usually 5 days.
3.What payment methods are accepted for 7024S35JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S35JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S35JI?
7024S35JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S35JI 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 7024S35JI?
For technical support, including 7024S35JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S35JI requirements.
6.How does Aetrix verify that 7024S35JI is sourced from the original manufacturer or authorized distributors?
All 7024S35JI 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 7024S35JI meets industry standards.
7.What is the process for return or replacement of 7024S35JI?
All 7024S35JI units undergo pre-shipment inspection (PSI). If there is an issue with 7024S35JI, 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 7024S35JI part is unused and in its original packaging.
Return procedure for 7024S35JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7024S35JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
