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Renesas 7130LA55C
- Part No.:
- 7130LA55C
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7130LA55C.pdf
- Description:
- IC SRAM 8KBIT PARALLEL SB48
- Quantity:
- Payment:
- Shipping:
Inventory:3,493
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Product details
Overview
7130LA55C from IDT (Integrated Device Technology) 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, and battery-backed data retention down to 2 V. It enables concurrent asynchronous access from left and right ports in real-time embedded systems requiring deterministic memory coherency.
For engineers reviewing the 7130LA55C datasheet, 7130LA55C pinout, 7130LA55C application, or 7130LA55C equivalent, this page delivers verified timing parameters, port arbitration behavior, BUSY/INT flag operation, and industrial-temperature (-40°C to +85°C) performance for dual-processor interconnect, video frame buffering, and legacy military avionics upgrades.
Technical Context
The 7130LA55C implements fully asynchronous dual-port architecture with independent address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion when both ports access the same address, with tBDD ≤ 55 ns ensuring deterministic resolution.
As a MASTER device, it features open-drain BUSYL/BUSYR outputs requiring external pull-up resistors and supports port-to-port interrupt signaling via INTL/INTR pins. The LA variant enables data retention at 2 V with ICCDR ≤ 4000 µA under industrial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact dual-processor shared memory without external width expansion |
| Access Time | 55 ns max (tAA, tACE, tAOE), guaranteeing sub-18 MHz synchronous interface compatibility |
| Standby Current | 1 mA typical (ISB3, CMOS-level inputs), supporting ultra-low-power sleep modes in battery-backed systems |
| Data Retention | 2.0 V minimum VCC (VDR), allowing retention during brown-out or backup-battery operation |
| Operating Temp | -40°C to +85°C (industrial grade), validated for deployment in automotive ECUs and industrial PLCs |
| Supply Voltage | 4.5 V to 5.5 V (VCC), compatible with standard TTL/CMOS 5 V logic rails |
| Arbitration Logic | On-chip priority resolution with tAPS = 5 ns setup, eliminating need for external glue logic in contention scenarios |
Pinout & Package
7130LA55C is packaged in a 48-pin ceramic flatpack (FP48) with 0.75″ × 0.75″ footprint and 0.11″ height, rated for industrial temperature operation and MIL-PRF-38535 QML compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins ensure low-impedance return path for both ports' I/O and core logic |
| VCC (Pin 25) | Power supply | Single 5 V ±10% supply powers entire dual-port array and arbitration logic |
| CEL / CER | Chip enable (left/right) | Independent CE control allows selective port activation-critical for power-gating one side during idle |
| OEL / OER | Output enable (left/right) | Per-port OE enables high-impedance tri-state on I/O lines during non-read cycles |
| R/WL / R/WR | Read/write direction (left/right) | Active-high R/W selects read (H) or write (L); enables true asynchronous bidirectional operation |
| BUSYL / BUSYR | Arbitration status (open-drain) | Asserted LOW when opposing port accesses same address; requires external 4.7 kΩ pull-up |
| INTL / INTR | Interrupt flag (open-drain) | Signals inter-port event completion (e.g., write done); driven LOW to request service from other CPU |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit addressing per port supports full 1K space; no address latching required |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (bidirectional) | True bidirectional 8-bit bus per port; no direction control pin needed-R/W determines flow |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates external priority encoder ICs and reduces PCB layout complexity in dual-CPU designs |
| Battery backup retention | Maintains valid data at 2 V supply-enables seamless switchover to backup battery during main power loss |
| Open-drain BUSY/INT outputs | Allows wired-OR connection of multiple 7130LA55C devices for scalable multi-port memory systems |
| Industrial temperature range | Validated operation from -40°C to +85°C ensures reliability in harsh environments without derating |
| Master-only configuration | Includes BUSY output and arbitration control-designed to coordinate with IDT7140 SLAVE for 16-bit+ expansion |
Applications
| Real-Time Dual-Processor Interconnect | Video Frame Buffering |
|---|---|
Use Scenario: Two independent microprocessors share sensor fusion data in autonomous vehicle ECU, requiring lock-free memory access. IC Role / Device Role / Timing Role: 7130LA55C acts as MASTER shared memory with hardware arbitration, resolving simultaneous writes to identical addresses within 55 ns. Use Value: Prevents data corruption without software semaphores, reducing CPU overhead by >30% versus polled shared-memory schemes. | Use Scenario: Legacy broadcast equipment uses dual-port RAM to buffer incoming video frames while simultaneously outputting previous frame to DAC. IC Role / Device Role / Timing Role: Left port accepts parallel pixel data at 27 MHz; right port streams out at 13.5 MHz-fully asynchronous operation enabled. Use Value: Enables zero-latency frame overlap with no external FIFO or clock-domain crossing logic. |
| Military Avionics Data Logging | Industrial PLC Shared Memory |
Use Scenario: Flight data recorder captures telemetry from multiple sensors while concurrently allowing ground-test system readout via separate port. IC Role / Device Role / Timing Role: 7130LA55C provides MIL-PRF-38535 qualified memory with 2 V data retention during transient power dips. Use Value: Guarantees non-volatile logging integrity across voltage sags up to 200 ms without supercapacitor support. | Use Scenario: Programmable logic controller uses dual-port RAM to exchange I/O state between safety-critical and non-safety firmware partitions. IC Role / Device Role / Timing Role: Left port interfaces with SIL3-certified motion control core; right port serves HMI update thread-hardware-enforced isolation. Use Value: Meets IEC 61508 partitioning requirements without runtime memory protection unit (MPU) configuration. |
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 no on-chip arbitration logic; BUSY must be implemented externally | Requires discrete priority encoder and pull-up network-increases BOM count and layout area | Select only if arbitration is handled in FPGA or if cost sensitivity outweighs design simplicity |
| IDT7140LA55C | Same speed and retention, but SLAVE-only: BUSY inputs only, no arbitration logic or BUSY outputs | Cannot operate standalone; must pair with 7130LA55C as MASTER in 16-bit+ systems | Use exclusively as companion SLAVE when expanding data bus width beyond 8 bits |
Compared with CY7C131-55JC, 7130LA55C integrates arbitration to reduce component count and timing uncertainty; compared with IDT7140LA55C, it provides MASTER functionality essential for autonomous dual-port coordination without external controllers.
Availability
7130LA55C is available at Aetrix Electronics and suitable for real-time dual-processor interconnect, video frame buffering, and military avionics data logging requiring stable component supply across extended product lifecycles.
Supply support for 7130LA55C 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 IDT7130 family was designed specifically for deterministic dual-processor communication and real-time embedded systems where hardware arbitration and low-power retention are mandatory.
FAQ
What is the guaranteed data retention voltage for the 7130LA55C?
The 7130LA55C guarantees data retention down to 2.0 V (VDR) with ICCDR ≤ 4000 µA at industrial temperature. This enables reliable operation during brown-out events or when switching to backup battery power without data loss. The specification is validated per IDT datasheet Table 07 and applies only to LA variants-not SA versions.
Does the 7130LA55C require external pull-up resistors on BUSY and INT pins?
Yes, the 7130LA55C features open-drain BUSYL, BUSYR, INTL, and INTR outputs, requiring external pull-up resistors (typically 4.7 kΩ to VCC). This allows wired-OR connection of multiple devices and ensures proper logic HIGH level when deasserted. Failure to install pull-ups results in undefined BUSY/INT states and arbitration failure.
Can the 7130LA55C operate as a standalone dual-port RAM without a SLAVE device?
Yes, the 7130LA55C functions fully as a standalone 1K × 8 dual-port SRAM. Its MASTER designation indicates integrated arbitration logic and BUSY outputs-no IDT7140 SLAVE is required unless expanding to 16-bit or wider data paths. In standalone mode, both ports operate independently with full read/write capability.
What is the meaning of "tBDD ≤ 55 ns" in the 7130LA55C timing specifications?
tBDD (BUSY Disable to Valid Data) ≤ 55 ns specifies the maximum delay between BUSY deassertion and valid read data appearing on the output bus. This parameter ensures deterministic resolution of port contention-when BUSY goes HIGH, data is guaranteed stable within 55 ns, enabling tight timing margins in real-time systems using the 7130LA55C.
How does the 7130LA55C handle simultaneous access to the same memory location from both ports?
When both ports attempt access to the same address, the 7130LA55C's on-chip arbitration asserts BUSYL or BUSYR LOW (but never both) to block the later-arriving write. The winning port proceeds; the blocked port's write is ignored. Priority is determined by tAPS (5 ns setup), and resolution is completed within tBDD ≤ 55 ns-guaranteeing deterministic behavior without software intervention.
7130LA55C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 48-SIDE BRAZED
7130LA55C FAQ
1.How can I place an order for 7130LA55C through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55C 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 7130LA55C reliable?
The price and inventory of 7130LA55C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55C is usually 5 days.
3.What payment methods are accepted for 7130LA55C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55C?
7130LA55C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55C 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 7130LA55C?
For technical support, including 7130LA55C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55C requirements.
6.How does Aetrix verify that 7130LA55C is sourced from the original manufacturer or authorized distributors?
All 7130LA55C 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 7130LA55C meets industry standards.
7.What is the process for return or replacement of 7130LA55C?
All 7130LA55C units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55C, 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 7130LA55C part is unused and in its original packaging.
Return procedure for 7130LA55C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130LA55C Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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