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Renesas 7130SA55JI8
- Part No.:
- 7130SA55JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130SA55JI8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
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Product details
Overview
7130SA55JI8 from IDT is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 ns maximum read/write cycle time, open-drain BUSY outputs requiring pull-up resistors, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time control systems.
For engineers reviewing the 7130SA55JI8 datasheet, 7130SA55JI8 pinout, 7130SA55JI8 application, or 7130SA55JI8 equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 55 ns), dual-port asynchronous access, TTL-compatible 5V ±10% supply, 48-pin ceramic flatpack package, and master-specific features like INTL/INTR flag generation and port-to-port interrupt signaling.
Technical Context
The 7130SA55JI8 implements fully independent left/right ports with separate address (A0L–A9L, A0R–A9R), data (I/O0L–I/O7L, I/O0R–I/O7R), and control lines (CEL/CER, OEL/OER, R/WL/R/WR), enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention by asserting BUSYL/BUSYR outputs when address matches occur between ports.
As a MASTER device, it provides open-drain BUSY outputs (requiring external pull-ups) and bidirectional interrupt signaling via INTL and INTR pins - unlike SLAVE IDT7140 which accepts BUSY as inputs and lacks arbitration logic. The device supports battery backup data retention only in LA variants; the SA suffix confirms standard active power profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8 bits), sufficient for compact buffer or register-file applications in real-time controllers. |
| Access Time | 55 ns max read cycle time (tRC), enabling integration into 18 MHz synchronous bus systems with margin. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), TTL-compatible interface eliminates level-shifting in legacy 5V designs. |
| Operating Temp | –40°C to +85°C (industrial grade), validated for deployment in motor drives and industrial PLCs. |
| Power Consumption | Active current typ. 110 mA (ICC), standby current typ. 20 mA (ISB1), supporting low-duty-cycle monitoring modes. |
| Arbitration Logic | On-chip port arbitration with tAPS = 5 ns setup, ensuring deterministic resolution of simultaneous access to same address. |
| Battery Retention | Not supported - SA suffix denotes standard power version (LA required for 2V data retention). |
Pinout & Package
7130SA55JI8 is packaged in a 48-pin ceramic flatpack (FP48), body size ≈ 0.75 in × 0.75 in × 0.11 in, with lead finish suitable for high-reliability soldering and hermetic sealing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins reduce ground bounce during dual-port switching transients. |
| VCC (Pin 25) | Power supply | Single 5V supply powers both ports; all VCC pins must be decoupled locally. |
| CEL / CER | Chip enable (left/right) | Independent enables allow selective port activation - critical for power-gating one port while the other remains active. |
| OEL / OER | Output enable (left/right) | Controls tri-state of I/O drivers; high-Z state prevents bus contention during shared-memory transfers. |
| R/WL / R/WR | Read/write control (left/right) | Active-high write enables; asynchronous operation permits overlapping read/write across ports. |
| BUSYL / BUSYR | Arbitration status (open-drain) | Asserted low during address contention; requires external pull-up resistor per datasheet Note 1 & 2. |
| INTL / INTR | Interrupt flag (bidirectional) | Set/reset via dedicated address writes (e.g., A9–A0 = 3FFH); enables inter-processor signaling without polling. |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit addressing per port supports full 1K space; no internal multiplexing - true dual-ported architecture. |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit buses; direction controlled by R/W and OE - no external transceivers needed. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoders or glue logic in multi-processor shared-memory topologies. |
| Master/slave expandability | Enables seamless 16-bit+ data bus width using IDT7140 SLAVE devices - no timing skew or additional wait states. |
| Port-to-port interrupt signaling | INTL/INTR flags support event-driven synchronization between processors without shared registers or polling overhead. |
| Open-drain BUSY outputs | Allows wired-OR connection of multiple 7130 devices for scalable arbitration in larger memory arrays. |
| Full asynchronous operation | Each port operates independently - no clock required, simplifying integration with mixed-timing subsystems. |
Applications
| Real-Time Motion Control | Digital Signal Processor Interface |
|---|---|
Use Scenario: Coordinating position feedback and command updates between FPGA-based motion controller and servo drive microcontroller. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized data exchange buffer; left port writes encoder counts, right port reads trajectory commands. Use Value: 55 ns access ensures sub-microsecond latency for closed-loop updates, meeting <1 µs jitter requirements in servo loops. | Use Scenario: Sharing filter coefficients and processed audio samples between DSP core and ARM host processor in telecom baseband unit. IC Role / Device Role / Timing Role: Acts as zero-wait-state shared memory; DSP writes results to right port while ARM reads via left port. Use Value: Asynchronous dual access avoids pipeline stalls - maintains 100% DSP utilization during host-side DMA bursts. |
| Industrial PLC I/O Mapping | Avionics Data Acquisition Hub |
Use Scenario: Buffering discrete I/O status and analog channel readings across redundant CPU modules in safety-critical PLC chassis. IC Role / Device Role / Timing Role: MASTER 7130SA55JI8 arbitrates access between primary and hot-standby CPUs sharing sensor/actuator maps. Use Value: Hardware BUSY flag prevents write collisions during failover - guarantees atomic update of I/O image without software locks. | Use Scenario: Aggregating sensor data from multiple ADCs and routing to flight management computer and health monitoring unit. IC Role / Device Role / Timing Role: Serves as time-deterministic data crossbar; left port receives ADC streams, right port feeds FMC and HUMS concurrently. Use Value: Industrial temp rating (–40°C to +85°C) and ceramic package ensure reliability in uncontrolled avionics bays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-55JC | 55 ns access, 1K × 8, but lacks on-chip arbitration logic and BUSY/INT signaling; requires external logic for contention resolution. | Suitable for simple dual-CPU systems where software-managed mutual exclusion is acceptable. | Select when cost sensitivity outweighs need for hardware arbitration and interrupt offload. |
| IDT7140SA55JI8 | Same speed and pinout, but SLAVE-only: BUSY pins are inputs (not outputs), no arbitration logic, no INTL/INTR capability. | Used only in conjunction with 7130 MASTER for wider bus expansion; cannot operate standalone as arbitration node. | Choose only as companion device to 7130SA55JI8 in 16-bit+ memory configurations. |
Compared with CY7C131-55JC and IDT7140SA55JI8, the 7130SA55JI8 uniquely delivers integrated arbitration, interrupt signaling, and MASTER functionality - reducing BOM count and eliminating timing-critical external logic in real-time deterministic systems.
Availability
7130SA55JI8 is available at Aetrix Electronics and suitable for real-time motion control, digital signal processor interfacing, and industrial PLC I/O mapping requiring stable component supply across extended product lifecycles.
Supply support for 7130SA55JI8 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.
The IDT7130/7140 family was designed specifically for deterministic, low-latency shared-memory architectures in industrial automation and military computing - emphasizing hardware arbitration, interrupt offload, and robust 5V operation.
FAQ
What is the function of BUSYL and BUSYR on the 7130SA55JI8?
BUSYL and BUSYR are open-drain arbitration status outputs on the 7130SA55JI8. When asserted low, they indicate address contention between left and right ports - blocking writes to the contended port until resolved. Per datasheet Note 1, external pull-up resistors are mandatory for proper operation, and both signals cannot be low simultaneously.
Can the 7130SA55JI8 operate with a 3.3V supply?
No, the 7130SA55JI8 requires a 5.0 V ±10% supply (4.5–5.5 V) and is TTL-compatible only. It does not support 3.3V operation - attempting 3.3V will result in undefined behavior, failed arbitration, and non-compliant VIH/VIL thresholds per DC Electrical Characteristics Table 02.
How does the 7130SA55JI8 differ from the IDT7140SA55JI8?
The 7130SA55JI8 is a MASTER dual-port SRAM with on-chip arbitration logic, open-drain BUSY outputs, and bidirectional INTL/INTR interrupt flags. In contrast, IDT7140SA55JI8 is a SLAVE device: its BUSY pins are inputs (not outputs), it lacks arbitration logic, and it cannot generate interrupts - it functions only as an expansion device paired with a 7130.
Does the 7130SA55JI8 support battery backup data retention?
No, the 7130SA55JI8 does not support battery backup. The "SA" suffix denotes the standard power version. Battery backup with 2V data retention is exclusive to "LA" variants (e.g., 7130LA55JI8), as confirmed in Data Retention Characteristics Table 07 and Features section.
What package type is used for the 7130SA55JI8?
7130SA55JI8 uses a 48-pin ceramic flatpack (FP48) package, with dimensions approximately 0.75 in × 0.75 in × 0.11 in. This hermetic package is specified for high-reliability industrial and military applications, distinct from plastic DIP or LCC variants offered in the same family.
7130SA55JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-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:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7130SA55JI8 FAQ
1.How can I place an order for 7130SA55JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130SA55JI8 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 7130SA55JI8 reliable?
The price and inventory of 7130SA55JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130SA55JI8 is usually 5 days.
3.What payment methods are accepted for 7130SA55JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130SA55JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130SA55JI8?
7130SA55JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130SA55JI8 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 7130SA55JI8?
For technical support, including 7130SA55JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130SA55JI8 requirements.
6.How does Aetrix verify that 7130SA55JI8 is sourced from the original manufacturer or authorized distributors?
All 7130SA55JI8 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 7130SA55JI8 meets industry standards.
7.What is the process for return or replacement of 7130SA55JI8?
All 7130SA55JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7130SA55JI8, 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 7130SA55JI8 part is unused and in its original packaging.
Return procedure for 7130SA55JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130SA55JI8 Tags
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