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Renesas 7133SA25JI8
- Part No.:
- 7133SA25JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA25JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
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Product details
Overview
7133SA25JI8 from IDT (Integrated Device Technology) is a high-speed 2K × 16 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 25 ns maximum access time, industrial temperature range (–40°C to +85°C), and 5 V ±10% single-supply operation. It enables simultaneous asynchronous read/write access from independent left and right ports in real-time embedded systems requiring deterministic memory contention resolution.
For engineers reviewing the 7133SA25JI8 datasheet, 7133SA25JI8 pinout, 7133SA25JI8 application, or 7133SA25JI8 equivalent, this page delivers verified timing parameters, BUSY arbitration behavior, byte-select write control, battery backup capability (2 V data retention), and package-specific I/O mapping for reliable system integration in military-grade and industrial control designs.
Technical Context
The 7133SA25JI8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves port-to-port contention by asserting open-drain BUSYL/BUSYR outputs-requiring external pull-up resistors-and supports MASTER/SLAVE expansion for 32-bit+ data width without external logic.
It features independent upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible signaling, and automatic power-down via chip enable (CE). The device operates across –40°C to +85°C with guaranteed 25 ns max access time under industrial conditions and supports battery backup with 2 V data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 (32,768 bits), dual-port SRAM with independent left/right access paths |
| Access Time (max) | 25 ns - guarantees deterministic read latency for real-time control loops at industrial temperature |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic rails; no auxiliary supplies required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Power Consumption | Active: 1150 mW (typ.), Standby: 5 mW (typ.) - enables low-idle-power operation in battery-backed systems |
| Data Retention | 2 V minimum VCC - maintains stored data during brownout or backup battery mode |
| Arbitration Logic | On-chip port arbitration with BUSY flag generation - eliminates need for external bus controllers in multi-CPU systems |
Pinout & Package
7133SA25JI8 is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC and GND pins must be connected to ensure reliable operation; unused pins are not present (no N/Cs in PLCC variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address per port; supports full 2K addressing independently on each side |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data I/O (Left/Right) | 16-bit parallel data path per port; supports byte-level reads/writes via R/WLUB/R/WLLB etc. |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables respective port; controls power-down mode when deasserted |
| R/WLUB / R/WRUB R/WLLB / R/WRLB | Upper/Lower Byte Write Enable (Left/Right) | Enables selective 8-bit writes per port-critical for mixed-data-width peripheral interfacing |
| OEL / OER | Output Enable (Left/Right) | Controls tri-state output drivers; allows shared bus operation without external transceivers |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention; requires external pull-up; used for hardware stall or interrupt generation |
| VCC (×2) / GND (×2) | Power & Ground | Dual VCC/GND pairs ensure stable supply distribution and noise immunity in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| MASTER-mode arbitration logic | Resolves simultaneous same-address access deterministically-eliminates race conditions in dual-CPU systems |
| Separate upper/lower byte write control | Enables atomic 8-bit updates without read-modify-write cycles-reduces bus traffic in protocol stacks |
| 2 V data retention | Maintains memory contents during main power loss-enables seamless recovery after brownout or battery switchover |
| Asynchronous dual-port operation | Zero wait-state concurrent access from independent buses-supports lock-free interprocessor communication |
| TTL-compatible I/O | Direct interface to legacy 5 V microcontrollers and FPGAs-no level-shifting circuitry required |
Applications
| Industrial Motion Controller | Military Avionics Data Buffer |
|---|---|
Use Scenario: Real-time coordination between motion CPU and safety monitor CPU sharing position/velocity data. IC Role / Device Role / Timing Role: MASTER dual-port RAM providing synchronized, contention-resolved memory access with BUSY-driven stall signaling. Use Value: Eliminates software polling and ensures deterministic <25 ns read response for closed-loop servo updates. |
Use Scenario: Fault-tolerant flight control system where two dissimilar processors cross-check sensor fusion results. IC Role / Device Role / Timing Role: High-reliability memory buffer with MIL-PRF-38535 QML compliance and –55°C to +125°C extended temp support. Use Value: Guarantees data coherency during simultaneous read/write with hardware arbitration-no risk of silent corruption. |
| Telecom Line Card Buffer | Medical Imaging Frame Store |
Use Scenario: Packet processing engine and network processor exchanging frame metadata and status flags. IC Role / Device Role / Timing Role: Dual-port SRAM acting as zero-latency mailbox with byte-select write enabling partial descriptor updates. Use Value: Reduces inter-processor handshake overhead by >40% versus serial message passing over PCIe or SPI. |
Use Scenario: Real-time acquisition and display pipeline where FPGA-acquired image tiles are written while DSP performs reconstruction. IC Role / Device Role / Timing Role: High-bandwidth, low-jitter memory buffer supporting concurrent 16-bit pixel stream ingestion and readout. Use Value: Sustains >38 MHz sustained throughput (tRC = 25 ns) without frame tearing or dropped lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-25JC | 2K × 16, 25 ns, 5 V, but no on-chip arbitration logic; BUSY function absent | Requires external logic for contention management; unsuitable for MASTER/SLAVE expansion | Select only if arbitration is handled in FPGA or if single-port operation suffices |
| IDT7143SA25JI8 | Same speed/package, but SLAVE-only: BUSY pins are inputs only; no arbitration logic | Used exclusively with 7133SA25JI8 in width-expanded systems; cannot operate stand-alone as MASTER | Required companion for 32-bit+ bus expansion; never a drop-in replacement for 7133SA25JI8 |
Compared with CY7C133-25JC and IDT7143SA25JI8, the 7133SA25JI8 uniquely integrates arbitration logic and open-drain BUSY outputs-making it the sole choice for self-contained dual-CPU memory sharing without external glue logic.
Availability
7133SA25JI8 is available at Aetrix Electronics and suitable for industrial motion control, military avionics, and telecom line card applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for DO-254/DO-178 compliance.
Supply support for 7133SA25JI8 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 high-performance memory, timing, and interface solutions, now part of Renesas Electronics.
The IDT7133/7143 family was designed specifically for deterministic, contention-free dual-processor communication in real-time embedded systems-prioritizing hardware arbitration, low-latency access, and robust industrial/military qualification.
FAQ
What is the operating temperature range for the 7133SA25JI8?
The 7133SA25JI8 is rated for industrial temperature operation from –40°C to +85°C. This is explicitly confirmed in the "Maximum Operating Temperature and Supply Voltage" table and supported by DC/AC electrical characteristics tested across this range. The 'I' suffix in the part number denotes industrial grade, and the 'J' indicates ceramic PLCC packaging.
Does the 7133SA25JI8 support battery backup operation?
Yes, the 7133SA25JI8 supports battery backup with guaranteed data retention at VCC ≥ 2.0 V, as specified in Table 08 ("Data Retention Characteristics"). This applies to both SA and LA variants, and the 7133SA25JI8 meets this specification with typical ICCDR ≤ 4000 µA at 2 V under industrial conditions.
Is the 7133SA25JI8 pin-compatible with the IDT7143SA25JI8?
Yes-the 7133SA25JI8 and IDT7143SA25JI8 share identical pinouts per the "Pin Configurations" diagrams and "Pin Names" table. However, functional differences exist: BUSYL/BUSYR are open-drain outputs on the 7133SA25JI8 (MASTER) but inputs on the 7143SA25JI8 (SLAVE), and arbitration logic is present only in the 7133SA25JI8.
What is the purpose of the R/WLUB and R/WLLB pins on the 7133SA25JI8?
R/WLUB (Read/Write Upper Byte) and R/WLLB (Read/Write Lower Byte) provide independent byte-level write control for the left port. This allows selective 8-bit writes to I/O0L–I/O7L or I/O8L–I/O15L without affecting the other byte-essential for efficient protocol register updates and mixed-width peripheral interfacing in the 7133SA25JI8.
How does the BUSY arbitration work in the 7133SA25JI8 during simultaneous access?
When both ports attempt access to the same memory location, the 7133SA25JI8's on-chip arbitration logic asserts BUSYL or BUSYR (open-drain) to stall the later-arriving access. The winning port proceeds; the stalled port's write is internally gated. Timing parameters tBAA, tBDA, and tBDD define the BUSY response window, with values ≤30 ns for the 25 ns speed grade.
7133SA25JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-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:
- 32Kbit
- Memory Organization:
- 2K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133SA25JI8 FAQ
1.How can I place an order for 7133SA25JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA25JI8 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 7133SA25JI8 reliable?
The price and inventory of 7133SA25JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA25JI8 is usually 5 days.
3.What payment methods are accepted for 7133SA25JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA25JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA25JI8?
7133SA25JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA25JI8 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 7133SA25JI8?
For technical support, including 7133SA25JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA25JI8 requirements.
6.How does Aetrix verify that 7133SA25JI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA25JI8 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 7133SA25JI8 meets industry standards.
7.What is the process for return or replacement of 7133SA25JI8?
All 7133SA25JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA25JI8, 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 7133SA25JI8 part is unused and in its original packaging.
Return procedure for 7133SA25JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA25JI8 Tags
-
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
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
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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