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Renesas 7130LA55CB
- Part No.:
- 7130LA55CB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7130LA55CB.pdf
- Description:
- IC SRAM 8KBIT PARALLEL SB48
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
7130LA55CB 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, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables simultaneous independent access from left and right ports in real-time embedded systems requiring deterministic memory contention resolution.
For engineers reviewing the 7130LA55CB datasheet, 7130LA55CB pinout, 7130LA55CB application, or 7130LA55CB equivalent, this page delivers verified timing parameters, BUSY/INT arbitration behavior, battery-backed data retention specs, and exact package mapping for FP48 ceramic flatpack - critical for PCB layout, power budgeting, and fail-safe inter-processor communication design.
Technical Context
The 7130LA55CB implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion, with tBDD ≤ 55 ns and tAPS = 5 ns ensuring deterministic priority resolution when address matches occur.
As a MASTER device, it features open-drain BUSYL/BUSYR outputs requiring external pull-up resistors, supports INTL/INTR interrupt signaling for port-to-port notification, and enters full standby mode (ISB3 ≤ 10 µA) when both CE inputs exceed VCC − 0.2 V - enabling ultra-low-power battery backup operation at 2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), supporting independent left/right port access without internal wait states. |
| Access Time | 55 ns max (tAA, tACE, tAOE), guaranteeing sub-18.2 MHz sustained throughput per port under worst-case industrial conditions. |
| Data Retention | 2.0 V minimum VCC, enabling >100 µA ICCDR retention current for battery-backed operation during main power loss. |
| Operating Temp | –40°C to +85°C (industrial grade), validated across full voltage range (4.5 V to 5.5 V) and all AC timing parameters. |
| Standby Current | ISB3 ≤ 10 µA (both ports in CMOS-level standby), reducing system quiescent power by >99% vs active mode (ICC ≈ 155 mA). |
| Arbitration Logic | On-chip hardware arbitration with tAPS = 5 ns setup, eliminating need for external glue logic in MASTER/SLAVE configurations. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), TTL-compatible inputs, and open-drain BUSY outputs with 0.5 V max VOL at 16 mA sink. |
Pinout & Package
7130LA55CB is supplied in a 48-pin ceramic flatpack (FP48) package measuring approximately 0.75 in × 0.75 in × 0.11 in, with side-brazed leads and hermetic sealing suitable for industrial and military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins ensure low-impedance return paths for both ports' I/O and core logic. |
| VCC (Pin 25) | Power supply | Single 5 V supply powers entire device; all VCC pins must be decoupled locally per datasheet layout guidance. |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion places port in high-Z or standby depending on input levels. |
| OEL / OER | Output enable (left/right) | Controls I/O bus direction: low enables output drivers, high forces high-impedance state. |
| R/WL / R/WR | Read/write control (left/right) | High = read, low = write; determines data flow direction on I/O lines during active cycles. |
| BUSYL / BUSYR | Arbitration status (open-drain) | Outputs indicate port contention; require external pull-up resistors to assert HIGH when port access is granted. |
| INTL / INTR | Interrupt flag (open-drain) | Signals inter-port events (e.g., write to 3FFH sets INTR); requires pull-up and debouncing in host system. |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit address buses decode 1K locations independently; no shared address lines between ports. |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (bidirectional) | Separate 8-bit data buses per port; no internal multiplexing - true concurrent read/write possible. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Hardware-resolved port contention eliminates external priority encoder ICs and reduces BOM count in dual-CPU systems. |
| 2V data retention (LA version) | Enables seamless transition to battery backup during main power failure without data loss or software intervention. |
| Open-drain BUSY/INT outputs | Allows wired-OR connection of multiple dual-port devices on shared BUSY/INT busses for scalable multi-master architectures. |
| Master-only BUSY flag generation | Distinguishes 7130LA55CB from SLAVE 7140 variants - critical for correct system-level arbitration topology design. |
| Industrial temperature support | Validated operation from –40°C to +85°C ensures reliability in motor drives, PLCs, and transportation control units. |
Applications
| Real-Time Motion Control | Dual-CPU Industrial PLC |
|---|---|
Use Scenario: Coordinated servo axis control where CPU-A writes trajectory data while CPU-B reads position feedback in lockstep. IC Role / Device Role / Timing Role: MASTER dual-port SRAM buffers motion commands and sensor data with deterministic <55 ns access and hardware arbitration. Use Value: Eliminates software polling or semaphores; tBDD ≤ 55 ns ensures worst-case contention resolution within one motion control loop cycle. | Use Scenario: Redundant safety controller exchanging status and fault logs between primary and backup CPUs. IC Role / Device Role / Timing Role: Shared memory hub with INTL/INTR flags enabling atomic event notification without bus contention. Use Value: tINS ≤ 45 ns interrupt set time guarantees sub-50 ns inter-processor signaling latency for SIL-3 compliant diagnostics. |
| Battery-Backed Data Logger | Avionics Sensor Fusion Unit |
Use Scenario: Black-box recorder capturing flight parameters during power interruption using onboard coin cell. IC Role / Device Role / Timing Role: Nonvolatile buffer retaining last 1K of telemetry at 2.0 V VCC with ISB3 ≤ 10 µA leakage. Use Value: Meets DO-160 Section 22 surge immunity requirements by sustaining data integrity during 100 ms brownout events. | Use Scenario: Radar + INS sensor fusion processor sharing raw ADC samples and timestamped metadata between processing cores. IC Role / Device Role / Timing Role: Low-jitter memory interface with tOH = 10 ns hold time preventing metastability in time-critical sampling windows. Use Value: Enables synchronous 100 kSPS dual-channel capture with <1 ns inter-core timestamp skew via shared address space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1354V25 | 4-Mbit density, 25 ns access, 3.3 V supply only; no 2V data retention or industrial temp rating. | Requires level-shifting in 5 V systems; unsuitable for battery-retention or extended temperature deployments. | Select only if higher density and lower voltage operation outweigh retention and temp requirements. |
| IDT7140LA55CB | SLAVE variant: no on-chip arbitration, BUSY inputs only, identical timing and retention specs. | Must be paired with a MASTER (e.g., 7130LA55CB) to form 16-bit+ bus; cannot operate standalone as memory controller. | Use exclusively as companion SLAVE in MASTER/SLAVE expansion - never as drop-in replacement. |
Compared with CY7C1354V25 and IDT7140LA55CB, the 7130LA55CB uniquely combines industrial temperature support, 2V data retention, and autonomous arbitration - making it irreplaceable in safety-critical, battery-backed, or deterministic real-time systems where external logic minimization is mandatory.
Availability
7130LA55CB is available at Aetrix Electronics and suitable for real-time motion control, dual-CPU industrial PLCs, battery-backed data loggers, and avionics sensor fusion units requiring stable component supply across extended lifecycle programs.
Supply support for 7130LA55CB 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, and interface solutions, now part of Renesas Electronics.
The IDT7130/7140 family was designed specifically for deterministic dual-processor communication and real-time control applications demanding hardware-arbitrated shared memory with guaranteed timing and data retention.
FAQ
What is the maximum operating temperature range for the 7130LA55CB?
The 7130LA55CB is rated for industrial temperature operation from –40°C to +85°C, with all AC and DC electrical characteristics fully specified and tested across this range at 4.5 V to 5.5 V supply voltage. This makes it suitable for deployment in harsh environments such as factory automation controllers and transportation electronics where ambient thermal stress is significant.
Does the 7130LA55CB support true simultaneous read/write operations on both ports?
Yes, the 7130LA55CB supports fully asynchronous, independent read and write operations on left and right ports. When non-conflicting addresses are accessed, both ports operate concurrently with no timing penalty. Contention is resolved automatically via BUSY flag assertion - not by blocking - preserving determinism in real-time systems using the 7130LA55CB.
How does the 2V data retention feature work in the 7130LA55CB?
The 7130LA55CB retains stored data down to VCC = 2.0 V with ICCDR ≤ 4000 µA (military/industrial) or ≤ 1500 µA (commercial), verified per datasheet Table 7. This is achieved through optimized CMOS cell design and low-leakage standby modes - no external circuitry required. The 7130LA55CB enters retention mode automatically when CE inputs exceed VCC − 0.2 V and VCC drops below 4.5 V.
Is the 7130LA55CB pin-compatible with the 7130SA55CB?
Yes, the 7130LA55CB and 7130SA55CB share identical FP48 pinout, address/control signal mapping, and timing architecture. The sole functional difference is power profile: LA offers 1 µA typical standby (vs 5 mW for SA) and 2V data retention, while SA lacks retention but may exhibit slightly faster tHZ/tLZ in some conditions. No PCB redesign is needed when upgrading from SA to LA variant.
What external components are required for proper BUSY and INT signal operation on the 7130LA55CB?
The 7130LA55CB's BUSYL, BUSYR, INTL, and INTR pins are open-drain outputs and require external pull-up resistors to VCC. Per datasheet Figure 3 and Notes 1–2, 10 kΩ resistors are recommended for standard TTL loads. Pull-ups must be placed close to the 7130LA55CB pins to minimize noise susceptibility, especially in electrically noisy industrial environments where the 7130LA55CB is commonly deployed.
7130LA55CB 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 48-SIDE BRAZED
7130LA55CB FAQ
1.How can I place an order for 7130LA55CB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55CB 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 7130LA55CB reliable?
The price and inventory of 7130LA55CB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55CB is usually 5 days.
3.What payment methods are accepted for 7130LA55CB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55CB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55CB?
7130LA55CB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55CB 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 7130LA55CB?
For technical support, including 7130LA55CB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55CB requirements.
6.How does Aetrix verify that 7130LA55CB is sourced from the original manufacturer or authorized distributors?
All 7130LA55CB 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 7130LA55CB meets industry standards.
7.What is the process for return or replacement of 7130LA55CB?
All 7130LA55CB units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55CB, 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 7130LA55CB part is unused and in its original packaging.
Return procedure for 7130LA55CB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130LA55CB Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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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
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AT24C08C-STUM-T
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