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Renesas 7025L35JI
- Part No.:
- 7025L35JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7025L35JI.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,253
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Product details
Overview
7025L35JI from IDT is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 35 ns maximum read cycle time, 2V data retention for battery backup operation, and industrial temperature range (–40°C to +85°C). It supports full on-chip semaphore signaling and port arbitration for real-time inter-processor communication in embedded control systems.
For engineers reviewing the 7025L35JI datasheet, 7025L35JI pinout, 7025L35JI application, or 7025L35JI equivalent, this device is selected for deterministic dual-access memory in avionics data buffers, industrial PLC co-processor interfaces, and military-grade radar signal processing modules where simultaneous read/write conflict resolution and low-power standby are critical.
Technical Context
The 7025L35JI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent access without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports MASTER/SLAVE cascading for 32-bit+ word expansion.
It features dedicated semaphore registers (8 flags, addressed by A0–A2), interrupt flag generation, and byte-selectable upper/lower I/O control (UBL/LBL, UBR/LBR) for multiplexed bus compatibility. The L-version delivers 1 µA typical standby current at 5 V and retains data down to 2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 16 bits (128 Kbit), true dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time | 35 ns - guarantees deterministic timing for real-time systems operating up to ~28.6 MHz sustained read throughput |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; no auxiliary voltage rails required |
| Standby Current | 1 µA typical (ISB3, CMOS-level inputs) - enables ultra-low-power battery-backed retention mode |
| Data Retention Voltage | 2.0 V minimum - sustains stored data during main power loss using coin-cell backup |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| I/O Interface | 16-bit bidirectional data bus per port, with separate UB/LB and R/W controls - eliminates need for external byte-lane gating logic |
Pinout & Package
7025L35JI is packaged in an 84-pin ceramic PGA (PLG84) with 1.15″ × 1.15″ footprint and 0.17″ height, pin-compatible with IDT7025S/L family variants in PGA, PLCC, Flatpack, and TQFP packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Independent port activation; deassertion places corresponding port in ultra-low-power standby (1 µA) |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; high = read or high-impedance output state |
| OEL / OER | Output Enable (Left / Right) | Separate output gating per port; allows one port to drive while other remains tri-stated |
| A0L–A12L / A0R–A12R | Address Inputs (Left / Right) | 13-bit address space (8K locations); supports simultaneous access to same or different addresses |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | Fully bidirectional 16-bit buses; no direction pin required - direction determined by R/W and OE states |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-granular writes (e.g., update only upper 8 bits without disturbing lower byte) |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register bank; accessed via A0–A2 and I/O0–I/O15 for inter-processor coordination |
| 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 synchronization |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or memory event to host processor without polling overhead |
| M/S | Master/Slave Select | Configures device role in cascaded systems: H = master (BUSY output), L = slave (BUSY input) |
| VCC / GND | Power / Ground | Multiple distributed VCC/GND pins ensure stable noise margin and low-impedance return paths for high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads/writes to same or different addresses across independent ports - eliminates arbitration wait states in multi-CPU systems |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2 and I/O bus - removes need for external lock registers or software mutexes |
| Master/Slave Cascading Support | Single M/S pin configures device as master (generates BUSY) or slave (accepts BUSY) - simplifies 32-bit+ memory expansion without glue logic |
| 2V Data Retention | Maintains valid memory contents during main power failure using low-voltage backup source - critical for nonvolatile system state preservation |
| Industrial Temperature Range | Guaranteed operation from –40°C to +85°C with no performance degradation - suitable for uncontrolled enclosure environments |
| TTL-Compatible 5V Operation | Direct interface with legacy microcontrollers, FPGAs, and ASICs without level-shifting - reduces BOM count and layout complexity |
Applications
| Avionics Data Buffering | Industrial PLC Co-Processor Interface |
|---|---|
|
Use Scenario: Real-time acquisition and buffering of sensor telemetry in flight control computers, where two processors must concurrently access shared mission-critical data. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized shared memory between flight management unit (FMU) and autopilot controller, resolving access conflicts via hardware BUSY arbitration. Use Value: Eliminates software-based locking delays; 35 ns access ensures sub-microsecond response to attitude changes under full CPU load. |
Use Scenario: Inter-processor communication between main PLC CPU and motion control co-processor handling servo loop updates at 10 kHz. IC Role / Device Role / Timing Role: Provides deterministic, low-latency memory exchange with built-in semaphore signaling to coordinate axis position updates and safety status flags. Use Value: Reduces inter-processor latency by >90% vs. UART-based handshaking; 1 µA standby enables safe state retention during power cycling. |
| Military Radar Signal Processing | Medical Imaging Frame Store |
|
Use Scenario: Storing digitized RF samples in phased-array radar front-end, where ADC and DSP cores require concurrent, conflict-free memory access. IC Role / Device Role / Timing Role: Serves as ping-pong buffer between high-speed ADC interface (right port) and FFT accelerator (left port), managed via hardware semaphore flags. Use Value: Enables continuous sampling at 100 MSPS without pipeline stalls; 2V retention preserves last valid frame during brownout events. |
Use Scenario: Temporary storage of DICOM image frames in portable ultrasound devices, requiring fast access for display rendering and post-processing. IC Role / Device Role / Timing Role: Dual-port memory bridges FPGA-based image capture engine and ARM application processor, allowing simultaneous write (raw scan) and read (rendering) operations. Use Value: Achieves zero-frame-drop video streaming at 30 fps; industrial temp rating ensures reliability in field-deployed equipment. |
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 | 35 ns access, 8K × 18 organization, 3.3 V core (with 5 V tolerant I/O), 100-pin TQFP | Wider data bus (18-bit), lower voltage operation - suited for newer 3.3 V systems but requires level translation for legacy 5 V controllers | Select when migrating to 3.3 V infrastructure and needing extra parity bits; not drop-in compatible due to voltage and pinout mismatch |
| AS7C38098B-35JCIN | 35 ns access, 8K × 16, 5 V operation, 84-pin PLCC package, commercial temp only (0°C to +70°C) | Lacks BUSY arbitration, semaphore, and M/S cascading logic - requires external logic for multi-processor coordination | Choose for cost-sensitive, single-processor designs where hardware arbitration is unnecessary and industrial temp is not required |
Compared with CY7C1370D-35BVXI and AS7C38098B-35JCIN, the 7025L35JI uniquely integrates full port arbitration, semaphore registers, and 2V data retention in a single 5 V industrial-grade package - making it irreplaceable in deterministic real-time systems where conflict resolution and battery backup are mandatory.
Availability
7025L35JI is available at Aetrix Electronics and suitable for avionics data buffering, industrial PLC co-processor interfaces, and military radar signal processing requiring stable component supply across extended product lifecycles.
Supply support for 7025L35JI 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 IDT7025 product line was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, battery-backed retention, and industrial/military environmental robustness.
FAQ
What is the guaranteed maximum access time for the 7025L35JI?
The 7025L35JI guarantees a maximum read cycle time (tRC) of 35 ns across its full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V). This specification includes worst-case propagation through address decode, memory array, and output drivers - ensuring deterministic timing for hard real-time applications without derating.
Does the 7025L35JI support true simultaneous read operations from both ports to the same memory location?
Yes, the 7025L35JI implements true dual-ported memory cells that allow simultaneous reads from both left and right ports to identical or different addresses without contention or data corruption. This capability is inherent to its silicon architecture and does not require external arbitration logic or timing constraints beyond standard setup/hold requirements.
How does the BUSY signal function in MASTER versus SLAVE configuration on the 7025L35JI?
When M/S = H (MASTER), BUSYL/BUSYR are outputs that assert during port contention to block conflicting writes. When M/S = L (SLAVE), BUSYL/BUSYR become inputs - the device monitors the BUSY signal from a master to delay its own write operations until the bus is free, enabling hierarchical arbitration in multi-device systems.
What is the minimum supply voltage required to retain data in the 7025L35JI during power loss?
The 7025L35JI retains valid data down to 2.0 V (VDR), as specified in Table 10 of the datasheet. At this voltage, the L-version draws ≤4000 µA (military grade) or ≤1500 µA (commercial grade) - enabling reliable retention using standard 2 V lithium coin cells or supercapacitor backup circuits.
Can the 7025L35JI be used in a 32-bit data path without external logic?
Yes - the 7025L35JI supports native 32-bit expansion via MASTER/SLAVE cascading. One device operates as MASTER (M/S = H) providing BUSY output, while another operates as SLAVE (M/S = L) accepting BUSY input. This configuration enables full-speed, error-free 32-bit word access without additional discrete logic or timing compensation.
7025L35JI 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:
- 128Kbit
- Memory Organization:
- 8K 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)
7025L35JI FAQ
1.How can I place an order for 7025L35JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7025L35JI 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 7025L35JI reliable?
The price and inventory of 7025L35JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025L35JI is usually 5 days.
3.What payment methods are accepted for 7025L35JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025L35JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7025L35JI?
7025L35JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7025L35JI 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 7025L35JI?
For technical support, including 7025L35JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025L35JI requirements.
6.How does Aetrix verify that 7025L35JI is sourced from the original manufacturer or authorized distributors?
All 7025L35JI 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 7025L35JI meets industry standards.
7.What is the process for return or replacement of 7025L35JI?
All 7025L35JI units undergo pre-shipment inspection (PSI). If there is an issue with 7025L35JI, 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 7025L35JI part is unused and in its original packaging.
Return procedure for 7025L35JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7025L35JI Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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