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Renesas 7130LA55J8/2930
- Part No.:
- 7130LA55J8/2930
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA55J8/2930.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
7130LA55J8/2930 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, 1 mA typical standby current (LA version), and battery-backed data retention down to 2 V. It enables full-speed 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7130LA55J8/2930 datasheet, 7130LA55J8/2930 pinout, 7130LA55J8/2930 application, or 7130LA55J8/2930 equivalent, this page delivers verified timing parameters, port arbitration behavior, BUSY/INT signal interaction, dual-port DC/AC electrical specs, and industrial-temperature (-40°C to +85°C) operation for deterministic multi-processor memory sharing.
Technical Context
The 7130LA55J8/2930 implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous access contention via BUSY flag assertion, with tBDD ≤ 35 ns (55 ns speed grade) ensuring valid read data after BUSY deassertion.
As a MASTER device, it features open-drain BUSYL/BUSYR outputs requiring external pull-ups, INTL/INTR flags for inter-port communication, and R/W-controlled or CE-controlled write cycles. The LA variant supports 2 V data retention with ISB3 ≤ 0.2 mA at CMOS-level standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1K × 8 (1024 words × 8 bits), two independent ports |
| Access Time (tAA) | 55 ns max - defines minimum address hold before valid data appears |
| Read Cycle Time (tRC) | 55 ns max - sets minimum interval between successive reads on same port |
| Standby Current (ISB3) | 0.2 mA typ. at CMOS-level inputs - enables ultra-low-power battery backup mode |
| Data Retention Voltage | 2.0 V min - guarantees nonvolatile data storage during main power loss |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems |
| Supply Voltage | 4.5 V to 5.5 V - TTL-compatible single 5 V ±10% rail |
Pinout & Package
7130LA55J8/2930 is supplied in a 48-pin ceramic flatpack (FP48) package measuring approximately 0.75 in × 0.75 in × 0.11 in, with through-hole mounting and side-braze construction for hermetic reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access (0–1023) |
| A0R–A9R | Right port address inputs | 10-bit address bus for right-side memory access (0–1023) |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; direction controlled by R/WL and OEL |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; direction controlled by R/WR and OER |
| CEL, CER | Chip enable (active low) | Gate activation for left/right ports; disables I/O drivers and reduces ICC |
| OEL, OER | Output enable (active low) | Controls output driver state on respective ports; high-Z when inactive |
| R/WL, R/WR | Read/write control | Low = write, high = read; determines data flow direction on I/O lines |
| BUSYL, BUSYR | Arbitration status (open drain) | Asserted low when opposite port accesses same address; requires external pull-up |
| INTL, INTR | Interrupt flag outputs | Set/cleared by specific address writes (e.g., A9–A0 = 3FFh/3FEh) to signal port events |
| VCC, GND | Power supply pins | All VCC pins must be connected to +5 V; all GND pins to ground plane |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous access without external logic; uses BUSY flag to block conflicting writes |
| Master/slave expandability | Enables seamless 16-bit+ word width systems using IDT7140 SLAVE devices without speed penalty |
| Battery backup data retention | Maintains stored data at 2 V supply with ≤100 µA retention current - critical for power-fail recovery |
| Open-drain BUSY outputs | Allows wired-OR connection of multiple 7130 devices for system-level arbitration coordination |
| Industrial temperature range | Guaranteed operation from -40°C to +85°C - suitable for motor drives, PLCs, and transportation controls |
Applications
| Real-Time Motion Control | Dual-Core Processor Interfacing |
|---|---|
|
Use Scenario: Coordinating servo position updates between FPGA-based motion sequencer and ARM Cortex-M7 controller. IC Role / Device Role / Timing Role: MASTER 7130LA55J8/2930 acts as shared memory buffer with deterministic <35 ns BUSY-to-data-valid latency. Use Value: Eliminates software polling or semaphores; enables sub-microsecond inter-processor synchronization for jitter-free trajectory execution. |
Use Scenario: Sharing sensor fusion results between safety-critical lockstep cores in automotive ADAS domain controller. IC Role / Device Role / Timing Role: Dual-port SRAM provides atomic read-modify-write access with hardware arbitration preventing race conditions. Use Value: Guarantees data coherency across redundant processors without CPU intervention or added gate delay. |
| Industrial PLC I/O Mapping | Avionics Data Acquisition Buffer |
|
Use Scenario: Storing cyclic I/O image data updated by real-time scan engine and accessed by HMI update task. IC Role / Device Role / Timing Role: Left port writes I/O states at 1 ms scan rate; right port reads for display refresh with no bus contention. Use Value: Decouples deterministic I/O scanning from variable-latency UI rendering - ensures consistent 100% scan completion. |
Use Scenario: Capturing high-rate analog sensor streams (e.g., accelerometers, gyros) during aircraft power brownouts. IC Role / Device Role / Timing Role: LA variant retains last valid sensor frame at 2 V backup supply during main power interruption. Use Value: Preserves critical flight data for post-event analysis even after complete 5 V rail collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C024AV-55AXC | 55 ns access, 1K × 16 organization, 3.3 V core (5 V tolerant I/O), no built-in arbitration logic | Requires external glue logic for BUSY arbitration; better suited for wide-bus standalone use than master/slave expansion | Select when 16-bit native width is preferred and arbitration can be implemented externally. |
| Renesas R1EX24002AS0I#U0 | 55 ns access, 1K × 8, integrated interrupt controller, 2.7–3.6 V supply only | Not 5 V compatible; lacks battery retention; interrupt handling is more complex but programmable | Choose for low-voltage systems where interrupt flexibility outweighs 5 V compatibility and data retention needs. |
Compared with CY7C024AV-55AXC and R1EX24002AS0I#U0, the 7130LA55J8/2930 uniquely combines 5 V operation, on-die arbitration, and 2 V data retention - making it irreplaceable in industrial master/slave memory architectures requiring guaranteed power-fail resilience.
Availability
7130LA55J8/2930 is available at Aetrix Electronics and suitable for real-time motion control, industrial PLC I/O mapping, avionics data acquisition, and dual-core processor interfacing requiring stable component supply across extended product lifecycles.
Supply support for 7130LA55J8/2930 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 timing, memory interface, and RF solutions, now part of Renesas Electronics.
The IDT7130 family was designed specifically for deterministic, contention-free memory sharing between heterogeneous processors in industrial, military, and aerospace systems - prioritizing arbitration integrity and power-loss resilience over density or cost.
FAQ
What is the function of BUSYL and BUSYR on the 7130LA55J8/2930?
BUSYL and BUSYR are open-drain arbitration status outputs on the 7130LA55J8/2930. When asserted low, they indicate that the opposite port is accessing the same memory address, blocking writes on the asserting port. Both require external pull-up resistors per datasheet Note 1 and Figure 3. This hardware arbitration eliminates software overhead in multi-processor systems using the 7130LA55J8/2930.
Does the 7130LA55J8/2930 support true 55 ns read/write cycles across its full industrial temperature range?
Yes, the 7130LA55J8/2930 guarantees tRC ≤ 55 ns and tAA ≤ 55 ns over -40°C to +85°C, as confirmed in Table 09b (AC Electrical Characteristics) and Table 10b (Write Cycle). These parameters are production-tested for industrial-grade units, ensuring deterministic timing in thermal-cycling environments like factory automation controllers.
How does the 7130LA55J8/2930 achieve 2 V data retention, and what is the maximum current draw in that mode?
The 7130LA55J8/2930 achieves 2 V data retention via optimized CMOS cell design and low-leakage fabrication. In retention mode (VCC = 2.0 V, CE > VCC − 0.2 V), ICCDR is guaranteed ≤ 4000 µA for military grade and ≤ 1500 µA for commercial grade per Table 07. This enables long-term storage using small backup batteries or supercapacitors without active regulation.
Can the 7130LA55J8/2930 be used as a standalone 8-bit dual-port RAM without pairing with an IDT7140?
Yes, the 7130LA55J8/2930 functions fully as a stand-alone 1K × 8 dual-port SRAM. Its on-chip arbitration, BUSY/INT signaling, and independent port controls operate identically whether used alone or with IDT7140 SLAVE devices. The "MASTER" designation reflects expandability capability - not functional dependency - as stated in the Description section on page 2.
What are the key differences between the 7130LA55J8/2930 and the 7130SA55J8/2930 variants?
The 7130LA55J8/2930 and 7130SA55J8/2930 share identical speed (55 ns), pinout, and functionality, differing only in power profile: LA offers 1 mA typical standby (ISB1) and 2 V data retention; SA draws 5 mA typical standby and lacks retention. Both meet industrial temperature specs, but LA is mandatory for battery-backed applications per Table 04 and Table 07.
7130LA55J8/2930 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7130LA55J8/2930 FAQ
1.How can I place an order for 7130LA55J8/2930 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55J8/2930 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 7130LA55J8/2930 reliable?
The price and inventory of 7130LA55J8/2930 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55J8/2930 is usually 5 days.
3.What payment methods are accepted for 7130LA55J8/2930?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55J8/2930 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55J8/2930?
7130LA55J8/2930 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55J8/2930 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 7130LA55J8/2930?
For technical support, including 7130LA55J8/2930 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55J8/2930 requirements.
6.How does Aetrix verify that 7130LA55J8/2930 is sourced from the original manufacturer or authorized distributors?
All 7130LA55J8/2930 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 7130LA55J8/2930 meets industry standards.
7.What is the process for return or replacement of 7130LA55J8/2930?
All 7130LA55J8/2930 units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55J8/2930, 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 7130LA55J8/2930 part is unused and in its original packaging.
Return procedure for 7130LA55J8/2930:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130LA55J8/2930 Tags
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