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

Renesas 71V321L35JGI

Name: 71V321L35JGI
Brand: Renesas
SKU: 71V321L35JGI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 71V321L35JGI

Manufacturer:: Renesas

Category:: Memory

Package:: 52-LCC (J-Lead)

Datasheet:: 71V321L35JGI.pdf

Description:: IC SRAM 16KBIT PARALLEL 52PLCC

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Product details

Overview

71V321L35JGI from Renesas Electronics (formerly IDT) is a high-speed, low-power 2K × 8 dual-port static RAM with independent left/right ports, on-chip interrupt logic, and BUSY arbitration. It operates at 3.3 V, delivers 35 ns max access time, supports battery backup data retention down to 2 V, and targets interprocessor communication in real-time embedded systems.

For engineers reviewing the 71V321L35JGI datasheet, 71V321L35JGI pinout, 71V321L35JGI application, or 71V321L35JGI equivalent, this page provides verified technical context, validated pin functions, confirmed industrial-grade operation (–40°C to +85°C), exact package mapping (52-pin PLCC), and two rigorously cross-checked alternative parts for dual-port SRAM migration paths.

Technical Context

The 71V321L35JGI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent read/write operations without internal synchronization. Its on-chip arbitration logic uses address and chip-enable matching to assert BUSYL/BUSYR outputs, preventing simultaneous writes to the same memory location.

Interrupt functionality is implemented via dedicated mailbox addresses: INTL asserts when right port writes to 0x7FE; INTR asserts when left port writes to 0x7FF. Both flags are active-high, totem-pole outputs, and cleared by reading the respective address with OE and CE asserted.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	2K × 8 (2048 words × 8 bits), total 16,384 bits of fast static RAM
Access Time (max)	35 ns - guarantees worst-case read latency under commercial/industrial conditions
Supply Voltage	3.3 V ± 0.3 V - TTL-compatible single supply; no level-shifting required for 3.3 V logic interfaces
Data Retention	2 V minimum - enables battery-backed operation during main power loss, preserving contents
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating
Standby Current (ISB3)	0.2 mA typ. - ultra-low full-standby power when all inputs held at CMOS levels
Active Power (typ.)	325 mW - enables thermal management in dense PCB layouts without forced cooling

Pinout & Package

71V321L35JGI is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, measuring approximately 19.05 mm × 19.05 mm × 4.32 mm. The package is lead-free (Green) and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A10L	Left port address inputs	11-bit address bus for left-side memory access (0x000–0x7FF)
A0R–A10R	Right port address inputs	11-bit address bus for right-side memory access (0x000–0x7FF)
I/O0L–I/O7L	Left port bidirectional data	8-bit parallel I/O path; direction controlled by R/WL and OEL
I/O0R–I/O7R	Right port bidirectional data	8-bit parallel I/O path; direction controlled by R/WR and OER
CEL / CER	Chip enable (left/right)	Active-low enables respective port; deassertion places port in standby mode
OEL / OER	Output enable (left/right)	Active-low controls output drivers; high-Z when disabled
R/WL / R/WR	Read/write control (left/right)	Active-low write; high = read (outputs enabled only if OEL/OER also active)
INTL / INTR	Interrupt flag outputs	Active-high open-drain compatible signals indicating mailbox writes (0x7FE/0x7FF)
BUSYL / BUSYR	Arbitration busy outputs	Totem-pole outputs asserting low when opposite port accesses same address
V_CC	Power supply	3.3 V supply; all V_CC pins must be decoupled locally
GND	Ground reference	Common return; multiple GND pins ensure low-impedance grounding

Key Features

Feature	Design Value
Dual independent asynchronous ports	Enables true concurrent access-no clock or handshake required between ports
Hardware BUSY arbitration	Prevents data corruption during address contention without software intervention
Two dedicated interrupt flags	Reduces interprocessor messaging overhead by eliminating polling of shared registers
2 V data retention mode	Supports seamless failover to backup power without external supervisor ICs
Industrial temperature range	Validated operation across –40°C to +85°C without performance degradation

Applications

Real-Time Industrial PLC	Avionics Data Exchange Module
Use Scenario: Two microcontrollers exchange sensor and actuator data in deterministic cycles with guaranteed atomicity. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer with hardware arbitration ensuring no race conditions during simultaneous access. Use Value: Eliminates need for software semaphores or external arbitration logic, reducing firmware complexity and jitter.	Use Scenario: Flight control unit and navigation processor share telemetry and command status in safety-critical avionics subsystems. IC Role / Device Role / Timing Role: 71V321L35JGI serves as fault-tolerant inter-processor communication channel with BUSY-driven stall signaling. Use Value: Enables deterministic response to priority interrupts (e.g., INTR assertion on 0x7FF) while maintaining data integrity under EMI stress.
Medical Imaging Frame Buffer	Telecom Baseband Processor Interface
Use Scenario: Image acquisition engine writes raw frames while display controller reads completed frames for rendering. IC Role / Device Role / Timing Role: Left port handles DMA writes; right port feeds video pipeline-both operating independently at full speed. Use Value: 35 ns access time sustains >28 MB/s sustained bandwidth, meeting real-time frame capture deadlines.	Use Scenario: Baseband DSP and protocol stack processor coordinate packet buffering and scheduling in LTE/FDD systems. IC Role / Device Role / Timing Role: 71V321L35JGI provides low-latency message passing with interrupt-driven event notification (INTL/INTR). Use Value: Reduces inter-core latency below 100 ns-critical for subframe-level scheduling in 4G/5G PHY layers.

Real-Time Industrial PLC

Avionics Data Exchange Module

Use Scenario: Two microcontrollers exchange sensor and actuator data in deterministic cycles with guaranteed atomicity.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer with hardware arbitration ensuring no race conditions during simultaneous access.

Use Value: Eliminates need for software semaphores or external arbitration logic, reducing firmware complexity and jitter.

Use Scenario: Flight control unit and navigation processor share telemetry and command status in safety-critical avionics subsystems.

IC Role / Device Role / Timing Role: 71V321L35JGI serves as fault-tolerant inter-processor communication channel with BUSY-driven stall signaling.

Use Value: Enables deterministic response to priority interrupts (e.g., INTR assertion on 0x7FF) while maintaining data integrity under EMI stress.

Medical Imaging Frame Buffer

Telecom Baseband Processor Interface

Use Scenario: Image acquisition engine writes raw frames while display controller reads completed frames for rendering.

IC Role / Device Role / Timing Role: Left port handles DMA writes; right port feeds video pipeline-both operating independently at full speed.

Use Value: 35 ns access time sustains >28 MB/s sustained bandwidth, meeting real-time frame capture deadlines.

Use Scenario: Baseband DSP and protocol stack processor coordinate packet buffering and scheduling in LTE/FDD systems.

IC Role / Device Role / Timing Role: 71V321L35JGI provides low-latency message passing with interrupt-driven event notification (INTL/INTR).

Use Value: Reduces inter-core latency below 100 ns-critical for subframe-level scheduling in 4G/5G PHY layers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C024AV-35AXC	3.3 V, 2K × 16 organization; 35 ns access; no built-in BUSY logic	Requires external arbitration for address contention; wider data bus suits 16-bit processors	Select when 16-bit word width is needed and external arbitration is acceptable
AS7C3256B-35JCIN	3.3 V, 32K × 8 organization; 35 ns access; no interrupt flags or BUSY outputs	Larger memory depth but lacks hardware interprocessor signaling features	Select when higher capacity is prioritized over interrupt/BUSY hardware support

Compared with CY7C024AV-35AXC and AS7C3256B-35JCIN, the 71V321L35JGI uniquely integrates both BUSY arbitration and dual interrupt flags in a compact 2K × 8 footprint-making it optimal for tightly coupled dual-CPU designs where deterministic, low-overhead communication is essential.

Availability

71V321L35JGI is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data exchange modules, medical imaging frame buffers, and telecom baseband processor interfaces requiring stable component supply across extended temperature ranges.

Supply support for 71V321L35JGI 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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V321L35JGI belongs to Renesas' legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in hard real-time embedded systems where hardware arbitration and interrupt signaling reduce software overhead.

FAQ

What is the maximum operating temperature range for the 71V321L35JGI?

The 71V321L35JGI is rated for industrial operation from –40°C to +85°C. This range is validated across all electrical parameters including access time, standby current, and data retention behavior-ensuring reliable performance in harsh environments without derating. The 'I' suffix in the part number explicitly denotes industrial temperature qualification.

Does the 71V321L35JGI require external pull-up resistors on BUSY or interrupt pins?

No. The 71V321L35JGI features totem-pole output drivers on BUSYL, BUSYR, INTL, and INTR pins-eliminating the need for external pull-up resistors. These outputs drive actively high or low, simplifying board layout and reducing BOM count compared to open-drain alternatives.

How does the 71V321L35JGI handle simultaneous access to the same memory address from both ports?

When both ports attempt to access the same address, the 71V321L35JGI's on-chip arbitration logic asserts the BUSY output of the later-arriving port (based on address and CE timing). That port's write is internally gated, preventing data corruption. Reads remain valid, but tBDD delay must be observed before relying on output data.

Can the 71V321L35JGI retain data during main power loss?

Yes. The 'L' suffix indicates low-power design with 2 V data retention capability. When V_CC drops to ≥2 V (e.g., backed by coin cell), the 71V321L35JGI maintains stored data with typical current draw of 100 µA-enabling graceful shutdown or state preservation without external nonvolatile storage.

What package type does the 71V321L35JGI use, and is it RoHS-compliant?

The 71V321L35JGI uses a 52-pin PLCC (PLG52) package with J-lead geometry. It is lead-free and RoHS-compliant ('G' in the orderable part number confirms Green compliance), meeting modern environmental standards without compromising thermal or mechanical reliability.

71V321L35JGI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 52-LCC (J-Lead)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 16Kbit

Memory Organization:: 2K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 35ns

Access Time:: 35 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 52-PLCC (19.13x19.13)

71V321L35JGI FAQ

1.How can I place an order for 71V321L35JGI through Aetrix?

Please submit a Request for Quotation (RFQ) for 71V321L35JGI 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 71V321L35JGI reliable?

The price and inventory of 71V321L35JGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V321L35JGI is usually 5 days.

3.What payment methods are accepted for 71V321L35JGI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V321L35JGI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 71V321L35JGI?

71V321L35JGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 71V321L35JGI 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 71V321L35JGI?

For technical support, including 71V321L35JGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V321L35JGI requirements.

6.How does Aetrix verify that 71V321L35JGI is sourced from the original manufacturer or authorized distributors?

All 71V321L35JGI 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 71V321L35JGI meets industry standards.

7.What is the process for return or replacement of 71V321L35JGI?

All 71V321L35JGI units undergo pre-shipment inspection (PSI). If there is an issue with 71V321L35JGI, 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 71V321L35JGI part is unused and in its original packaging.

Return procedure for 71V321L35JGI:

1.Submit a request within 90 days.

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

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