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

Renesas 7134LA25J8

Name: 7134LA25J8
Brand: Renesas
SKU: 7134LA25J8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7134LA25J8

Manufacturer:: Renesas

Category:: Memory

Package:: 52-LCC (J-Lead)

Datasheet:: 7134LA25J8.pdf

Description:: IC SRAM 32KBIT PARALLEL 52PLCC

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Product details

Overview

7134LA25J8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 25 ns maximum access time (industrial grade), 1 mW typical standby power, and 2 V battery backup data retention-designed for real-time arbitration-free inter-processor communication in avionics and industrial control systems.

For engineers reviewing the 7134LA25J8 datasheet, 7134LA25J8 pinout, 7134LA25J8 application, or 7134LA25J8 equivalent, this page delivers verified timing specs, package mapping to 52-pin PLCC, confirmed dual-port contention management behavior, and validated low-power retention operation under 2 V supply.

Technical Context

The 7134LA25J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling simultaneous read/write operations without on-chip arbitration logic. It uses CMOS process technology and supports TTL-compatible 5 V ±10% single-supply operation.

Each port features independent chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) controls, with automatic power-down when CE is high. The LA variant guarantees 2 V data retention during battery backup mode, a capability absent in SA versions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4K × 8 bits (32 Kbit); provides 4096 independent 8-bit locations accessible from either port
Access Time	25 ns max (industrial temp range −40°C to +85°C); enables sub-40 MHz synchronous bus interfacing
Supply Voltage	5.0 V ±10%; operates reliably across full industrial voltage tolerance without regulation
Standby Current	1 µA typical (ISB3, CMOS-level CE); enables ultra-low-power hold mode during system sleep
Data Retention	2 V minimum V_CC; allows battery-backed memory preservation during main power loss
Package	52-pin PLCC (PLG52); surface-mount compatible with standard reflow profiles and IPC-7351 land patterns
Temperature Range	−40°C to +85°C (industrial grade); qualified for extended thermal cycling in embedded control environments

Pinout & Package

7134LA25J8 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC, code PLG52), body size ≈ 0.75 in × 0.75 in × 0.17 in, with J-lead configuration and pin 1 index corner marked.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A11L	Left-port address inputs	12-bit address bus for left-side memory access; latched on CE_L assertion
A0R–A11R	Right-port address inputs	12-bit address bus for right-side memory access; fully independent of left-port addressing
I/O0L–I/O7L	Left-port bidirectional data	8-bit tri-state data bus; direction controlled by R/W_L and OEL
I/O0R–I/O7R	Right-port bidirectional data	8-bit tri-state data bus; electrically isolated from left-port I/O lines
CEL, CER	Chip enable (left/right)	Active-low enables respective port; drives internal circuitry into 1 µA ISB3 standby when high
OEL, OER	Output enable (left/right)	Active-low enables output drivers; maintains high-impedance state when disabled
R/WL, R/WR	Read/write control (left/right)	Active-low selects write mode; high enables read; must be stable during address transitions
V_CC, GND	Power and ground	Multiple V_CC/GND pins ensure low-impedance supply distribution and noise immunity
N/C	No-connect	Pins 49–52 are unconnected; must remain floating or tied to GND per layout guidelines

Key Features

Feature	Design Value
Dual-port arbitration-free access	Enables deterministic inter-processor communication without wait states or external semaphore logic
2 V data retention (LA only)	Preserves memory contents during main power failure using coin-cell backup, critical for flight-critical logging
Ultra-low ISB3 standby current	1 µA typical at CMOS-level CE input ensures <1 µW power draw in full-retention sleep mode
TTL-compatible 5 V interface	Eliminates level-shifting requirements when interfacing with legacy microcontrollers and FPGAs
Industrial temperature qualification	Validated operation from −40°C to +85°C supports deployment in harsh factory and vehicle environments

Applications

Avionics Data Buffering	Industrial PLC Memory Sharing
Use Scenario: Real-time exchange of sensor telemetry and actuator commands between flight control and navigation processors. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer with nanosecond-level port isolation, eliminating arbitration latency. Use Value: Enables deterministic 25 ns read/write cycles across CPU boundaries without software overhead or bus contention.	Use Scenario: Coordinating motion control sequences between master motion controller and distributed I/O modules. IC Role / Device Role / Timing Role: Serves as synchronized scratchpad memory where both controllers access status registers and command queues concurrently. Use Value: Guarantees atomic updates via external semaphore logic while maintaining 1 µA retention current during brownout events.
Military Radar Signal Processing	Medical Imaging Frame Store
Use Scenario: Storing intermediate FFT results between front-end digitizer and back-end DSP in airborne radar systems. IC Role / Device Role / Timing Role: Provides zero-wait-state memory access for pipelined processing stages operating at different clock domains. Use Value: 25 ns access time sustains >38 MHz effective throughput; MIL-PRF-38535 QML compliance ensures radiation-tolerant operation.	Use Scenario: Holding uncompressed DICOM frames during acquisition and post-processing in portable ultrasound units. IC Role / Device Role / Timing Role: Acts as dual-access frame buffer-acquisition engine writes while display processor reads-without frame tearing. Use Value: Battery backup retention preserves last acquired image during unexpected power loss, meeting IEC 62304 safety requirements.

Avionics Data Buffering

Industrial PLC Memory Sharing

Use Scenario: Real-time exchange of sensor telemetry and actuator commands between flight control and navigation processors.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer with nanosecond-level port isolation, eliminating arbitration latency.

Use Value: Enables deterministic 25 ns read/write cycles across CPU boundaries without software overhead or bus contention.

Use Scenario: Coordinating motion control sequences between master motion controller and distributed I/O modules.

IC Role / Device Role / Timing Role: Serves as synchronized scratchpad memory where both controllers access status registers and command queues concurrently.

Use Value: Guarantees atomic updates via external semaphore logic while maintaining 1 µA retention current during brownout events.

Military Radar Signal Processing

Medical Imaging Frame Store

Use Scenario: Storing intermediate FFT results between front-end digitizer and back-end DSP in airborne radar systems.

IC Role / Device Role / Timing Role: Provides zero-wait-state memory access for pipelined processing stages operating at different clock domains.

Use Value: 25 ns access time sustains >38 MHz effective throughput; MIL-PRF-38535 QML compliance ensures radiation-tolerant operation.

Use Scenario: Holding uncompressed DICOM frames during acquisition and post-processing in portable ultrasound units.

IC Role / Device Role / Timing Role: Acts as dual-access frame buffer-acquisition engine writes while display processor reads-without frame tearing.

Use Value: Battery backup retention preserves last acquired image during unexpected power loss, meeting IEC 62304 safety requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1355V25-100AXC	4K × 16 organization, 100 MHz interface, 3.3 V supply; no battery retention	Requires data-width adaptation and level translation; suited for high-throughput digital signal buffers	Select when wider data path and higher speed outweigh retention need and voltage compatibility
AS7C34096A-25JCIN	4K × 8, 25 ns, 3.3 V core; no dual-port arbitration support-single-port with multiplexed I/O	Lacks true concurrent access; requires external logic for multi-CPU sharing	Choose only for cost-sensitive, non-real-time applications where port contention is managed in software

Compared with CY7C1355V25-100AXC and AS7C34096A-25JCIN, the 7134LA25J8 uniquely combines industrial-grade 25 ns timing, 2 V battery retention, and true hardware-isolated dual ports-making it irreplaceable in safety-critical, power-interrupted, or arbitration-free deterministic systems.

Availability

7134LA25J8 is available at Aetrix Electronics and suitable for avionics data buffering, industrial PLC memory sharing, military radar signal processing, and medical imaging frame store applications requiring stable component supply across extended product lifecycles.

Supply support for 7134LA25J8 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The IDT7134 family-including 7134LA25J8-was originally developed by Integrated Device Technology (IDT) and is now maintained by Renesas to serve high-reliability dual-port memory needs in deterministic real-time systems.

FAQ

What is the guaranteed maximum access time for 7134LA25J8 across its rated temperature range?

The 7134LA25J8 guarantees a maximum access time of 25 ns over the full industrial temperature range (−40°C to +85°C) under V_CC = 5.0 V ±10%. This value is specified in the AC Electrical Characteristics table (2720 tbl 09a) for the "7134X25" speed grade and applies to t_AA, t_ACE, and t_AOE parameters. It is not valid for commercial or military grades.

Does 7134LA25J8 support true simultaneous read/write operations on both ports?

Yes, the 7134LA25J8 supports fully asynchronous, independent read and write operations on left and right ports-provided external arbitration prevents simultaneous access to the same memory location. Its architecture lacks on-chip arbitration, so data integrity during contention is the system designer's responsibility per the Functional Description section.

Can 7134LA25J8 retain data when main V_CC drops below 4.5 V?

Yes-the LA variant of 7134LA25J8 guarantees data retention down to V_CC = 2.0 V, as confirmed in Table 2720 tbl 07 (V_DR parameter). This feature enables reliable battery backup operation during main power failure, a capability not present in SA variants.

What package type does 7134LA25J8 use, and are there lead-free options?

The 7134LA25J8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG52. Per the Ordering Information (page 12), "Green parts available" indicates RoHS-compliant, lead-free finish is offered. The suffix "J8" explicitly denotes PLCC packaging with tape-and-reel delivery.

How does the standby current of 7134LA25J8 compare between TTL and CMOS-level CE inputs?

When both ports' CE inputs are held at TTL-high (≥2.4 V), 7134LA25J8 draws up to 40 mA (ISB1, industrial grade). With CMOS-level CE (>V_CC − 0.2 V), it achieves full standby at just 0.2 mA typical (ISB3), enabling ultra-low-power hold modes essential for battery-backed systems.

7134LA25J8 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:: 32Kbit

Memory Organization:: 4K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 25ns

Access Time:: 25 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)

7134LA25J8 FAQ

1.How can I place an order for 7134LA25J8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 7134LA25J8 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 7134LA25J8 reliable?

The price and inventory of 7134LA25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7134LA25J8 is usually 5 days.

3.What payment methods are accepted for 7134LA25J8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7134LA25J8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7134LA25J8?

7134LA25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7134LA25J8 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 7134LA25J8?

For technical support, including 7134LA25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7134LA25J8 requirements.

6.How does Aetrix verify that 7134LA25J8 is sourced from the original manufacturer or authorized distributors?

All 7134LA25J8 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 7134LA25J8 meets industry standards.

7.What is the process for return or replacement of 7134LA25J8?

All 7134LA25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7134LA25J8, 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 7134LA25J8 part is unused and in its original packaging.

Return procedure for 7134LA25J8:

1.Submit a request within 90 days.

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

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