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

Renesas 7130SA55J8/LT

Name: 7130SA55J8/LT
Brand: Renesas
SKU: 7130SA55J8/LT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7130SA55J8/LT

Manufacturer:: Renesas

Category:: Memory

Package:: 52-LCC (J-Lead)

Datasheet:: 7130SA55J8/LT.pdf

Description:: IC SRAM 8KBIT PARALLEL 52PLCC

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Product details

Overview

7130SA55J8/LT 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 access time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). 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 7130SA55J8/LT datasheet, 7130SA55J8/LT pinout, 7130SA55J8/LT application, or 7130SA55J8/LT equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 55 ns), dual-port asynchronous read/write independence, INT flag support for inter-port signaling, low standby current (ISB1 = 20 mA typ. at 55 ns), and compatibility with 48-pin ceramic flatpack (FP48) packaging.

Technical Context

The 7130SA55J8/LT implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention via BUSY output assertion-BUSYL and BUSYR are open-drain outputs requiring external pull-up resistors-and supports priority-based write inhibition when address matches occur.

It features dedicated interrupt signaling (INTL/INTR) for port-to-port communication, battery-backed data retention capability (2V, LA variant only-this SA part does not support retention), and four distinct standby modes (ISB1–ISB4) controlled by CE level and input voltage thresholds, enabling fine-grained power management in multi-processor systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1K × 8 bits (1024 words × 8-bit wide), providing compact dual-access buffer storage for real-time data exchange.
Access Time	55 ns max (tAA, tACE, tAOE), enabling integration into 18 MHz synchronous bus interfaces without wait states.
Supply Voltage	4.5 V to 5.5 V (5.0 V ±10%), compatible with standard TTL logic families and legacy 5V system rails.
Operating Temp	–40°C to +85°C (industrial grade), validated for deployment in motor drives, PLCs, and industrial communications equipment.
Standby Current	20 mA typical (ISB1, both ports disabled), supporting low-power idle modes in always-on embedded controllers.
Dynamic Current	110 mA typical (ICC, both ports active), allowing predictable thermal design in dense PCB layouts.
BUSY Timing	tBAA ≤ 55 ns, tBDD ≤ 55 ns-guarantees deterministic arbitration latency for time-critical inter-processor handshaking.

Pinout & Package

7130SA55J8/LT is packaged in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with side-brazed hermetic construction suitable for high-reliability industrial applications.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pins 1, 24, 25, 48)	Ground reference	All four GND pins must be connected to system ground plane for stable noise margin and EMI control.
VCC (Pin 26)	Power supply	Single 5V ±10% supply; all VCC pins require local 0.1 µF ceramic decoupling within 5 mm.
CEL / CER	Chip enable (left/right)	Active-low enables respective port; deassertion places port in high-impedance or standby mode.
OEL / OER	Output enable (left/right)	Active-low controls I/O drivers; used independently per port for selective data gating.
R/WL / R/WR	Read/write direction (left/right)	High = read, low = write; determines data flow direction on I/O bus during CE/OE assertion.
BUSYL / BUSYR	Arbitration flag (open-drain)	Outputs indicate port contention; require external 4.7 kΩ pull-up to VCC to drive interrupt logic or status latches.
INTL / INTR	Interrupt request (left/right)	Open-drain flags set/cleared by specific address writes (e.g., A9–A0 = 3FFH); used for inter-port event signaling.
A0L–A9L / A0R–A9R	Address inputs (left/right)	10-bit address buses (0–1023) - no internal address multiplexing; fully parallel access per port.
I/O0L–I/O7L / I/O0R–I/O7R	Data I/O (bidirectional)	8-bit bidirectional data paths; driven only when CE and OE are active; high-Z otherwise.

Key Features

Feature	Design Value
On-chip arbitration logic	Eliminates need for external glue logic in MASTER/SLAVE configurations-resolves simultaneous access via BUSY assertion with guaranteed tAPS ≥ 5 ns setup.
Dual independent asynchronous ports	Enables concurrent read/write operations from separate processors or DMA engines without software coordination or shared bus arbitration overhead.
Port-to-port interrupt signaling	INTL/INTR flags support hardware-triggered event notification (e.g., buffer full, command ready) with sub-50 ns latency (tINS ≤ 45 ns).
TTL-compatible interface	Direct connection to 5V microcontrollers, FPGAs, and ASICs without level-shifting-VIH = 2.2 V min, VIL = 0.8 V max ensures robust noise immunity.
Four standby power modes	ISB1–ISB4 allow dynamic power scaling: ISB3 (CMOS-level CE) draws only 1.0 mA typ., ideal for battery-assisted wake-on-event designs.

Applications

Motor Control System	Industrial PLC I/O Module
Use Scenario: Real-time coordination between motion controller (left port) and safety monitor (right port) sharing position and fault status buffers. IC Role / Device Role / Timing Role: MASTER dual-port SRAM acts as synchronized data bridge with deterministic BUSY arbitration ensuring atomic updates to shared encoder counts. Use Value: Eliminates software polling or semaphore overhead-tBDD ≤ 55 ns guarantees worst-case interlock resolution within one 18 MHz clock cycle.	Use Scenario: Isolating field I/O scan logic (right port) from HMI update engine (left port) in modular programmable logic controllers. IC Role / Device Role / Timing Role: Dual-port memory serves as non-blocking register file-enabling concurrent scan cycle execution and configuration writes without bus contention. Use Value: Achieves <10 µs inter-port latency (tINS ≤ 45 ns) for alarm propagation, meeting SIL-2 response time requirements.
Avionics Data Concentrator	Medical Imaging Frame Buffer
Use Scenario: Aggregating sensor telemetry (left port) and feeding processed packets to ARINC-429 interface (right port) in airborne health monitoring units. IC Role / Device Role / Timing Role: MASTER SRAM provides deterministic arbitration under EMI stress-open-drain BUSY outputs tolerate >200 mV ground bounce without false triggering. Use Value: FP48 ceramic package ensures MIL-STD-810G compliance; –40°C to +85°C rating supports operation in unpressurized avionics bays.	Use Scenario: Buffering raw X-ray detector frames (right port) while reconstruction engine reads prior frames (left port) in real-time CT subsystems. IC Role / Device Role / Timing Role: Asynchronous dual-port enables pipelined acquisition-full 55 ns access allows 18.2 MB/s sustained bandwidth per port (8-bit × 18.2 MHz). Use Value: 1K × 8 capacity matches common 1024-pixel line sensors; no external FIFO required reduces BOM count and layout area.

Motor Control System

Industrial PLC I/O Module

Use Scenario: Real-time coordination between motion controller (left port) and safety monitor (right port) sharing position and fault status buffers.

IC Role / Device Role / Timing Role: MASTER dual-port SRAM acts as synchronized data bridge with deterministic BUSY arbitration ensuring atomic updates to shared encoder counts.

Use Value: Eliminates software polling or semaphore overhead-tBDD ≤ 55 ns guarantees worst-case interlock resolution within one 18 MHz clock cycle.

Use Scenario: Isolating field I/O scan logic (right port) from HMI update engine (left port) in modular programmable logic controllers.

IC Role / Device Role / Timing Role: Dual-port memory serves as non-blocking register file-enabling concurrent scan cycle execution and configuration writes without bus contention.

Use Value: Achieves <10 µs inter-port latency (tINS ≤ 45 ns) for alarm propagation, meeting SIL-2 response time requirements.

Avionics Data Concentrator

Medical Imaging Frame Buffer

Use Scenario: Aggregating sensor telemetry (left port) and feeding processed packets to ARINC-429 interface (right port) in airborne health monitoring units.

IC Role / Device Role / Timing Role: MASTER SRAM provides deterministic arbitration under EMI stress-open-drain BUSY outputs tolerate >200 mV ground bounce without false triggering.

Use Value: FP48 ceramic package ensures MIL-STD-810G compliance; –40°C to +85°C rating supports operation in unpressurized avionics bays.

Use Scenario: Buffering raw X-ray detector frames (right port) while reconstruction engine reads prior frames (left port) in real-time CT subsystems.

IC Role / Device Role / Timing Role: Asynchronous dual-port enables pipelined acquisition-full 55 ns access allows 18.2 MB/s sustained bandwidth per port (8-bit × 18.2 MHz).

Use Value: 1K × 8 capacity matches common 1024-pixel line sensors; no external FIFO required reduces BOM count and layout area.

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, 5V, but lacks on-chip arbitration logic and BUSY/INT signals-requires external logic for MASTER/SLAVE coordination.	Not suitable for arbitration-critical systems; limited to single-processor dual-port use or designs with FPGA-based arbitration.	Select only if arbitration is handled externally and footprint compatibility with 48-pin SOJ is acceptable.
IDT7140SA55J8/LT	Same speed and package, but SLAVE-only: BUSY pins are inputs (not outputs), no arbitration logic, and no INT flag generation capability.	Must be paired with 7130SA55J8/LT as MASTER; cannot operate standalone in arbitration roles.	Use exclusively as companion SLAVE in 16-bit+ memory expansions-never as drop-in replacement for MASTER functionality.

Compared with CY7C131-55JC and IDT7140SA55J8/LT, the 7130SA55J8/LT uniquely integrates arbitration and interrupt logic in a single MASTER device, reducing component count and eliminating timing uncertainty from external arbitration circuits-critical for deterministic real-time systems.

Availability

7130SA55J8/LT is available at Aetrix Electronics and suitable for motor control systems, industrial PLC I/O modules, avionics data concentrators, and medical imaging frame buffers requiring stable component supply across extended product lifecycles.

Supply support for 7130SA55J8/LT 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, RF, and sensor signal conditioning ICs, now part of Renesas Electronics.

The IDT7130/7140 family was designed specifically for deterministic dual-processor memory sharing in industrial automation, aerospace, and medical equipment-emphasizing on-chip arbitration, low-latency interrupts, and ruggedized packaging.

FAQ

What is the maximum operating temperature range for the 7130SA55J8/LT?

The 7130SA55J8/LT is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time (55 ns max), standby current (ISB1 = 20 mA typ.), and BUSY arbitration timing (tBAA ≤ 55 ns). The FP48 ceramic flatpack package contributes to thermal stability in convection-cooled enclosures.

Does the 7130SA55J8/LT support battery backup data retention?

No, the 7130SA55J8/LT does not support battery backup data retention. That feature is exclusive to LA-suffixed variants (e.g., 7130LA55J8/LT), which specify VDR = 2.0 V minimum and ICCDR ≤ 4000 µA at 2V. The "SA" suffix denotes standard active power profile, with no characterization or guarantee for sub-4.5V operation or data retention.

How are BUSY signals used in the 7130SA55J8/LT?

In the 7130SA55J8/LT, BUSYL and BUSYR are open-drain outputs that assert low during port contention-e.g., when both ports attempt writes to the same address. They require external 4.7 kΩ pull-up resistors to VCC. These signals directly inhibit writes on the contending port and can drive external interrupt controllers or status LEDs without additional buffering.

Can the 7130SA55J8/LT operate with mixed voltage interfaces?

No, the 7130SA55J8/LT requires a single 5.0 V ±10% supply (4.5–5.5 V) and is TTL-compatible only. Input thresholds are VIH ≥ 2.2 V and VIL ≤ 0.8 V; it does not support 3.3 V or mixed-voltage I/O. Interfacing with 3.3 V processors requires level translation on all control, address, and data lines.

What package type is used for the 7130SA55J8/LT?

The 7130SA55J8/LT uses a 48-pin ceramic flatpack (FP48) package, with dimensions approximately 0.75 in × 0.75 in × 0.11 in. This hermetically sealed, side-brazed package meets MIL-PRF-38535 QML requirements and is specified for industrial temperature operation, offering superior moisture resistance and thermal cycling reliability versus plastic DIP or LCC alternatives.

7130SA55J8/LT 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)

7130SA55J8/LT FAQ

1.How can I place an order for 7130SA55J8/LT through Aetrix?

Please submit a Request for Quotation (RFQ) for 7130SA55J8/LT 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 7130SA55J8/LT reliable?

The price and inventory of 7130SA55J8/LT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130SA55J8/LT is usually 5 days.

3.What payment methods are accepted for 7130SA55J8/LT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130SA55J8/LT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7130SA55J8/LT?

7130SA55J8/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7130SA55J8/LT 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 7130SA55J8/LT?

For technical support, including 7130SA55J8/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130SA55J8/LT requirements.

6.How does Aetrix verify that 7130SA55J8/LT is sourced from the original manufacturer or authorized distributors?

All 7130SA55J8/LT 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 7130SA55J8/LT meets industry standards.

7.What is the process for return or replacement of 7130SA55J8/LT?

All 7130SA55J8/LT units undergo pre-shipment inspection (PSI). If there is an issue with 7130SA55J8/LT, 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 7130SA55J8/LT part is unused and in its original packaging.

Return procedure for 7130SA55J8/LT:

1.Submit a request within 90 days.

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

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