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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7130LA35C

Name: 7130LA35C
Brand: Renesas
SKU: 7130LA35C
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7130LA35C

Manufacturer:: Renesas

Category:: Memory

Package:: 48-DIP (0.600", 15.24mm)

Datasheet:: 7130LA35C.pdf

Description:: IC SRAM 8KBIT PARALLEL SB48

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Product details

Overview

7130LA35C 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, 35 ns maximum read cycle time, 1 mA typical standby current, and battery-backed data retention down to 2 V - used in real-time inter-processor communication systems requiring concurrent access without external logic.

For engineers reviewing the 7130LA35C datasheet, 7130LA35C pinout, 7130LA35C application, or 7130LA35C equivalent, this page delivers verified timing parameters, dual-port arbitration behavior, BUSY/INT flag operation, package-specific pin mapping, and direct alternatives for military-grade embedded memory upgrades.

Technical Context

The 7130LA35C implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention via BUSY output assertion and supports interrupt-driven inter-port signaling using INTL/INTR flags.

It operates at 5.0 V ±10% with TTL-compatible inputs, features open-drain BUSY outputs requiring external pull-ups, and supports battery backup mode (V_DR = 2.0 V) for data retention during main power loss - confirmed only for LA variants per datasheet Table 7.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1K × 8 bits (1024 words × 8-bit wide), enabling compact dual-access buffer storage
Access Time	35 ns max (t_AA, t_ACE, t_AOE), guaranteeing deterministic latency for real-time control loops
Standby Current	1 mA typical (ISB3, CMOS-level CE), critical for low-power battery-backed operation
Data Retention	2.0 V minimum V_CC (LA only), allowing retention during brownout or backup battery use
Operating Voltage	4.5–5.5 V DC, compatible with standard 5 V TTL/CMOS system rails
Temperature Range	Commercial grade: 0°C to +70°C, validated for non-military industrial control applications
Arbitration Logic	On-chip port-to-port arbitration with BUSY output flag (BUSYL/BUSYR), eliminating need for external glue logic

Pinout & Package

7130LA35C is available in 48-pin ceramic flatpack (FP48) and 48-pin plastic DIP (PDG48/SB48) packages. Pin functions are identical across both packages per datasheet drawings 03F and 02.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A9L	Left port address inputs	10-bit address bus for left-side memory access (0x000–0x3FF)
A0R–A9R	Right port address inputs	10-bit address bus for right-side memory access (0x000–0x3FF)
I/O0L–I/O7L	Left port bidirectional data	8-bit data path for reads/writes on left port; high-impedance when disabled
I/O0R–I/O7R	Right port bidirectional data	8-bit data path for reads/writes on right port; high-impedance when disabled
CEL, CER	Chip enable (left/right)	Active-low enables respective port; controls dynamic/standby current states
OEL, OER	Output enable (left/right)	Active-low enables data drivers; allows high-Z tri-state during shared bus use
R/WL, R/WR	Read/write control (left/right)	High = read, low = write; determines direction of I/O data flow per port
BUSYL, BUSYR	Busy flag outputs (open-drain)	Asserted low when opposite port accesses same address; requires external pull-up resistor
INTL, INTR	Interrupt flags (open-drain)	Set/cleared by specific address writes (e.g., A9–A0 = 3FEH/3FFH); require pull-up
VCC, GND	Power supply pins	Multiple VCC/GND pairs ensure stable operation and noise immunity across 48-pin layout

Key Features

Feature	Design Value
On-chip arbitration logic	Resolves simultaneous access conflicts automatically - no external priority encoder required
Dual independent asynchronous ports	Enables true concurrent read/write between two processors or subsystems without synchronization overhead
Battery backup data retention	Maintains memory contents at 2.0 V supply - supports fail-safe state preservation during power loss
Open-drain BUSY and INT outputs	Allows wired-OR interrupt/ready signaling across multiple devices on shared bus lines
TTL-compatible 5 V interface	Direct connection to legacy microcontrollers, FPGAs, and ASICs without level-shifting circuitry

Applications

Real-Time Inter-Processor Communication	Redundant Control System Buffering
Use Scenario: Two microcontrollers exchange status and command data in hard real-time loop with zero software coordination. IC Role / Device Role / Timing Role: MASTER dual-port SRAM acts as shared mailbox with hardware arbitration preventing data corruption during simultaneous access. Use Value: Eliminates polling or semaphore overhead; 35 ns access ensures sub-100 ns inter-core handshaking latency.	Use Scenario: Primary and backup controllers maintain synchronized state in avionics or rail signaling systems. IC Role / Device Role / Timing Role: Shared memory stores critical state variables; BUSY flag prevents inconsistent updates during switchover. Use Value: Enables atomic state snapshot capture and recovery without CPU intervention or external latches.
Legacy Bus Interface Bridge	Test Equipment Pattern Memory
Use Scenario: Bridging ISA or VME bus master to modern FPGA-based subsystem using discrete address/data lines. IC Role / Device Role / Timing Role: Provides synchronous-to-asynchronous translation layer with independent left/right timing domains. Use Value: Removes need for wait-state generators or FIFO buffers; 5 V tolerance simplifies interface design.	Use Scenario: High-speed digital pattern generator stores stimulus/response vectors for semiconductor ATE. IC Role / Device Role / Timing Role: Dual-port architecture allows one port to stream out patterns while second port loads next vector set. Use Value: Sustains continuous test throughput - no dead time between vector sets due to 35 ns access and full async operation.

Real-Time Inter-Processor Communication

Redundant Control System Buffering

Use Scenario: Two microcontrollers exchange status and command data in hard real-time loop with zero software coordination.

IC Role / Device Role / Timing Role: MASTER dual-port SRAM acts as shared mailbox with hardware arbitration preventing data corruption during simultaneous access.

Use Value: Eliminates polling or semaphore overhead; 35 ns access ensures sub-100 ns inter-core handshaking latency.

Use Scenario: Primary and backup controllers maintain synchronized state in avionics or rail signaling systems.

IC Role / Device Role / Timing Role: Shared memory stores critical state variables; BUSY flag prevents inconsistent updates during switchover.

Use Value: Enables atomic state snapshot capture and recovery without CPU intervention or external latches.

Legacy Bus Interface Bridge

Test Equipment Pattern Memory

Use Scenario: Bridging ISA or VME bus master to modern FPGA-based subsystem using discrete address/data lines.

IC Role / Device Role / Timing Role: Provides synchronous-to-asynchronous translation layer with independent left/right timing domains.

Use Value: Removes need for wait-state generators or FIFO buffers; 5 V tolerance simplifies interface design.

Use Scenario: High-speed digital pattern generator stores stimulus/response vectors for semiconductor ATE.

IC Role / Device Role / Timing Role: Dual-port architecture allows one port to stream out patterns while second port loads next vector set.

Use Value: Sustains continuous test throughput - no dead time between vector sets due to 35 ns access and full async operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C131-35JC	35 ns access, 1K × 8, but no on-chip arbitration logic; BUSY must be implemented externally	Requires additional logic for port conflict resolution; not drop-in for 7130LA35C arbitration-dependent designs	Select only if arbitration handled in FPGA or if single-port operation suffices
IDT7140LA35C	Same speed and retention, but SLAVE-only: BUSY inputs (not outputs), no arbitration logic, no INT flag generation	Must be paired with 7130LA35C as MASTER; cannot operate standalone as memory controller	Use only in MASTER/SLAVE 16-bit expansion configurations - not a functional replacement

Compared with CY7C131-35JC and IDT7140LA35C, the 7130LA35C uniquely integrates arbitration and interrupt generation, enabling autonomous dual-processor coordination without external components - essential for space-constrained or safety-critical systems where reliability and minimal BOM count are prioritized.

Availability

7130LA35C is available at Aetrix Electronics and suitable for real-time inter-processor communication, redundant control system buffering, and legacy bus interface bridging requiring stable component supply across commercial temperature range applications.

Supply support for 7130LA35C 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) was a fabless semiconductor company specializing in high-performance memory, timing, and interface ICs before its acquisition by Renesas Electronics in 2019.

The IDT7130 family was designed specifically for deterministic dual-processor memory sharing in aerospace, industrial automation, and telecom infrastructure - emphasizing hardware arbitration, low-latency access, and robust power management.

FAQ

What is the guaranteed maximum access time for the 7130LA35C?

The 7130LA35C guarantees a maximum read cycle time (t_RC) of 35 ns, with address access time (t_AA), chip enable access time (t_ACE), and output enable access time (t_AOE) all rated at ≤35 ns under commercial conditions (0°C to +70°C, V_CC = 4.5–5.5 V). This is explicitly specified in datasheet Table 9a for the "X35" speed grade.

Does the 7130LA35C support battery backup operation?

Yes - the 7130LA35C supports battery backup data retention at 2.0 V (V_DR), with typical retention current of 100 µA and maximum of 1500 µA under commercial conditions. This capability is exclusive to LA variants and confirmed in datasheet Table 7; SA versions do not support retention below 4.5 V.

How does the BUSY arbitration work on the 7130LA35C?

The 7130LA35C asserts BUSYL or BUSYR low when the opposite port initiates an access to the same memory location, blocking writes on the contending port. The arbitration uses t_APS (5 ns min setup) to determine priority; if unsatisfied, either BUSY line may assert. Both BUSY outputs are open-drain and require external pull-up resistors per datasheet Note 1.

Can the 7130LA35C be used as a standalone memory without a companion SLAVE device?

Yes - the 7130LA35C functions as a complete standalone 8-bit dual-port SRAM. Its MASTER designation refers to its ability to coordinate with IDT7140 SLAVE devices for 16-bit+ word width expansion, but it requires no companion part for basic 1K × 8 operation. All arbitration and interrupt logic is self-contained.

Which packages are available for the 7130LA35C?

The 7130LA35C is offered in 48-pin ceramic flatpack (FP48) and 48-pin plastic DIP (PDG48/SB48) packages, both with identical pinouts per datasheet Drawings 03F and 02. It is not available in PLCC, TQFP, or STQFP variants - those packages apply only to speed grades X55/X100 or SA versions per datasheet Package Notes.

7130LA35C 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:: 35ns

Access Time:: 35 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

7130LA35C FAQ

1.How can I place an order for 7130LA35C through Aetrix?

Please submit a Request for Quotation (RFQ) for 7130LA35C 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 7130LA35C reliable?

The price and inventory of 7130LA35C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA35C is usually 5 days.

3.What payment methods are accepted for 7130LA35C?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA35C transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7130LA35C?

7130LA35C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7130LA35C 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 7130LA35C?

For technical support, including 7130LA35C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA35C requirements.

6.How does Aetrix verify that 7130LA35C is sourced from the original manufacturer or authorized distributors?

All 7130LA35C 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 7130LA35C meets industry standards.

7.What is the process for return or replacement of 7130LA35C?

All 7130LA35C units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA35C, 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 7130LA35C part is unused and in its original packaging.

Return procedure for 7130LA35C:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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