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

Renesas 71V30L35TFI

Name: 71V30L35TFI
Brand: Renesas
SKU: 71V30L35TFI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 71V30L35TFI

Manufacturer:: Renesas

Category:: Memory

Package:: 64-LQFP

Datasheet:: 71V30L35TFI.pdf

Description:: IC SRAM 8KBIT PARALLEL 64TQFP

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Product details

Overview

71V30L35TFI from Renesas Electronics (formerly IDT) is a high-speed, low-power 1K × 8 dual-port static RAM with independent left/right ports, on-chip arbitration logic, interrupt flags, and battery-backed data retention down to 2V. It operates at 3.3V ±0.3V, supports industrial temperature range (−40°C to +85°C), and delivers 35ns max access time for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 71V30L35TFI datasheet, 71V30L35TFI pinout, 71V30L35TFI application, or 71V30L35TFI equivalent, this device serves as a deterministic, asynchronous memory bridge between two independent bus domains-enabling lock-free mailbox messaging, real-time DSP co-processing, and fault-tolerant controller redundancy without external arbitration logic.

Technical Context

The 71V30L35TFI implements fully asynchronous dual-port operation: each port (left/right) has dedicated address, data, and control lines (CEL/CER, OEL/OER, R/WL/R/WR), allowing concurrent read/write access to any memory location. Its hardware BUSY logic detects address contention and blocks writes on the losing port via non-tristatable push-pull BUSYL/BUSYR outputs.

Interrupt functionality uses fixed mailbox addresses (3FE_H for INTL, 3FF_H for INTR); asserting INTL occurs when the right port writes to 3FE_H, and clearing requires the left port to read/write that same address with CER=OER=VIL. The device supports full standby current as low as 1.0 mA (ISB3) and retains data at V_CC = 2.0 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	1K × 8 (8,192 bits), fully random-access SRAM array
Access Time (max)	35 ns - guarantees deterministic latency for real-time inter-processor handshaking
Supply Voltage	3.3 V ± 0.3 V - TTL-compatible single supply, no level-shifting required
Data Retention Voltage	2.0 V - enables battery backup during main power loss without external circuitry
Operating Temperature	−40°C to +85°C - qualified for industrial control, motor drives, and railway electronics
Full Standby Current	1.0 mA (ISB3) - ultra-low quiescent draw when both ports disabled via CMOS-level CE
Package	64-pin STQFP (PPG64), 10 mm × 10 mm × 1.4 mm - surface-mount compatible with standard reflow profiles

Pinout & Package

71V30L35TFI is housed in a 64-pin STQFP (PPG64) package with exposed thermal pad. Pin 1 is located at bottom-left corner (marked by dot), and pins are numbered counter-clockwise. All V_CC and GND pins must be connected per datasheet layout guidelines to ensure signal integrity and thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A9L	Left port address inputs	10-bit address bus for left-side memory access (0–1023)
A0R–A9R	Right port address inputs	10-bit address bus for right-side memory access (0–1023)
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; controls automatic power-down mode
OEL / OER	Output enable (left/right)	Active-low enables output drivers; high-Z when deasserted
R/WL / R/WR	Read/write control (left/right)	High = read, low = write; determines I/O direction per port
BUSYL / BUSYR	Busy flag outputs	Non-tristatable push-pull; low indicates address contention blocking write
INTL / INTR	Interrupt flag outputs	Push-pull outputs asserted when opposite port writes to mailbox addresses 3FE_H/3FF_H
V_CC	Power supply	3.3 V ± 0.3 V; all V_CC pins must be decoupled locally
GND	Ground	All GND pins must be connected to common ground plane

Key Features

Feature	Design Value
Hardware port arbitration	On-chip logic resolves simultaneous access to same address using BUSY outputs-eliminates need for external priority encoder or software polling
Dual-mailbox interrupt system	Fixed-location flags (3FE_H/3FF_H) enable zero-latency inter-processor signaling without shared register overhead or polling loops
Battery-backed data retention	Operates down to 2.0 V with ≤1000 µA retention current-supports seamless failover in power-critical PLCs and safety controllers
Ultra-low standby power	1.0 mA full standby (ISB3) at 3.3 V-reduces system-level power budget in always-on industrial gateways
Industrial-grade reliability	Qualified across −40°C to +85°C with 150°C max junction temperature-meets EN 50155 for rolling stock electronics

Applications

Motor Control Co-Processor Interface	Redundant Safety Controller Memory Bridge
Use Scenario: A primary MCU handles motion profiling while a secondary DSP performs real-time current loop calculations; both require synchronized access to shared trajectory buffers. IC Role / Device Role / Timing Role: 71V30L35TFI acts as deterministic, lock-free memory conduit-each processor accesses its own port asynchronously with guaranteed 35ns read/write latency. Use Value: Eliminates software mutex overhead and prevents deadlocks; BUSY logic ensures atomic updates to shared control words without CPU intervention.	Use Scenario: Dual-channel SIL3-rated safety PLC uses two independent CPUs monitoring identical I/O states; memory must reflect identical snapshots with sub-microsecond consistency. IC Role / Device Role / Timing Role: 71V30L35TFI provides mirrored, byte-addressable SRAM accessible by both CPUs-BUSY arbitration enforces write ordering during state transitions. Use Value: Enables hardware-enforced memory coherency without watchdog timers or CRC polling; supports IEC 61508 diagnostic coverage requirements.
DSP-FPGA Data Exchange Buffer	Real-Time Ethernet Node Shared Memory
Use Scenario: FPGA implements packet parsing and timestamping; DSP runs protocol stack and application logic-both require low-latency exchange of frame metadata and payload headers. IC Role / Device Role / Timing Role: 71V30L35TFI serves as zero-wait-state buffer between FPGA's parallel interface and DSP's EMIF-interrupts signal header readiness without polling. Use Value: Reduces FPGA logic resource usage (no FIFO controller needed); INTL/INTR flags cut inter-domain latency to <25 ns (tINS).	Use Scenario: Industrial Ethernet node (e.g., PROFINET IRT) requires deterministic exchange of cyclic process data between application layer and real-time MAC firmware running on separate cores. IC Role / Device Role / Timing Role: 71V30L35TFI functions as time-triggered shared memory-mailbox interrupts synchronize data commits to match cycle boundaries. Use Value: Achieves sub-1 µs jitter in data handoff; eliminates TCP/IP stack buffering delays and supports hard real-time cycle times ≤31.25 µs.

Motor Control Co-Processor Interface

Redundant Safety Controller Memory Bridge

Use Scenario: A primary MCU handles motion profiling while a secondary DSP performs real-time current loop calculations; both require synchronized access to shared trajectory buffers.

IC Role / Device Role / Timing Role: 71V30L35TFI acts as deterministic, lock-free memory conduit-each processor accesses its own port asynchronously with guaranteed 35ns read/write latency.

Use Value: Eliminates software mutex overhead and prevents deadlocks; BUSY logic ensures atomic updates to shared control words without CPU intervention.

Use Scenario: Dual-channel SIL3-rated safety PLC uses two independent CPUs monitoring identical I/O states; memory must reflect identical snapshots with sub-microsecond consistency.

IC Role / Device Role / Timing Role: 71V30L35TFI provides mirrored, byte-addressable SRAM accessible by both CPUs-BUSY arbitration enforces write ordering during state transitions.

Use Value: Enables hardware-enforced memory coherency without watchdog timers or CRC polling; supports IEC 61508 diagnostic coverage requirements.

DSP-FPGA Data Exchange Buffer

Real-Time Ethernet Node Shared Memory

Use Scenario: FPGA implements packet parsing and timestamping; DSP runs protocol stack and application logic-both require low-latency exchange of frame metadata and payload headers.

IC Role / Device Role / Timing Role: 71V30L35TFI serves as zero-wait-state buffer between FPGA's parallel interface and DSP's EMIF-interrupts signal header readiness without polling.

Use Value: Reduces FPGA logic resource usage (no FIFO controller needed); INTL/INTR flags cut inter-domain latency to <25 ns (tINS).

Use Scenario: Industrial Ethernet node (e.g., PROFINET IRT) requires deterministic exchange of cyclic process data between application layer and real-time MAC firmware running on separate cores.

IC Role / Device Role / Timing Role: 71V30L35TFI functions as time-triggered shared memory-mailbox interrupts synchronize data commits to match cycle boundaries.

Use Value: Achieves sub-1 µs jitter in data handoff; eliminates TCP/IP stack buffering delays and supports hard real-time cycle times ≤31.25 µs.

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, 1K × 16, 35 ns, 100-pin TQFP - wider data bus but larger footprint and higher active current (120 mA vs. 75 mA)	Requires PCB redesign for 16-bit data paths; less suitable for space-constrained 8-bit microcontroller interfaces	Select only if 16-bit parallel bandwidth is mandatory and board area permits 100-pin layout
AS7C31025B-35TIN	3.3 V, 1K × 8, 35 ns, 32-pin SOIC - smaller package but no BUSY/interrupt logic; purely asynchronous dual-port	Lacks hardware arbitration and mailbox interrupts-requires software-managed semaphores and polling	Choose when cost and size outweigh determinism needs; not recommended for safety-critical or real-time systems

Compared with CY7C024AV-35AXC and AS7C31025B-35TIN, the 71V30L35TFI uniquely integrates hardware arbitration and interrupt signaling in an 8-bit, 64-pin industrial package-delivering lower system-level latency, reduced firmware complexity, and inherent fault containment for mission-critical embedded designs.

Availability

71V30L35TFI is available at Aetrix Electronics and suitable for industrial motor drives, redundant safety controllers, DSP-FPGA co-processing platforms, and real-time Ethernet nodes requiring stable component supply across extended product lifecycles.

Supply support for 71V30L35TFI 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 embedded solutions for automotive, industrial, infrastructure, and IoT applications-with deep expertise in memory, microcontrollers, and analog mixed-signal ICs.

The 71V30L35TFI belongs to Renesas' legacy dual-port SRAM portfolio (originally developed by IDT), engineered specifically for deterministic inter-processor communication in harsh-environment control systems where hardware-enforced memory coherency is non-negotiable.

FAQ

What is the maximum operating temperature range for the 71V30L35TFI?

The 71V30L35TFI is rated for industrial temperature operation from −40°C to +85°C. This specification is validated across all electrical parameters including access time (35 ns max), standby current (ISB3 ≤ 1.0 mA), and data retention (V_DR = 2.0 V). It meets JEDEC JESD22-A104 reliability standards for extended thermal cycling.

Does the 71V30L35TFI support true dual-port simultaneous read/write operations?

Yes-the 71V30L35TFI supports fully asynchronous, independent read and write operations on left and right ports simultaneously. Each port has dedicated address, data, and control lines (A0L–A9L/I/O0L–I/O7L/CEL/OEL/R/WL and A0R–A9R/I/O0R–I/O7R/CER/OER/R/WR), enabling concurrent access to any memory location without internal bus contention.

How does the BUSY arbitration logic function in the 71V30L35TFI?

The 71V30L35TFI asserts BUSYL or BUSYR (non-tristatable push-pull) when both ports attempt access to the same address. The winning port proceeds; the losing port's write is gated internally. BUSY timing is deterministic: tBDD ≤ 30 ns (max) ensures rapid resolution. BUSY outputs can be OR'd externally to generate a system-level stall signal.

What are the mailbox addresses used for interrupt generation in the 71V30L35TFI?

The 71V30L35TFI uses fixed SRAM locations for interrupt signaling: writing to address 3FE_H (hex) with the right port asserts INTL, and writing to 3FF_H with the left port asserts INTR. Clearing requires the respective port to access the same address with CER=OER=VIL (for INTL) or CEL=OEL=VIL (for INTR), per Truth Table II in the datasheet.

Is battery backup supported on the 71V30L35TFI, and what are the retention specifications?

Yes-the 'L' suffix denotes low-power capability with battery backup. The 71V30L35TFI retains valid data at V_CC = 2.0 V (min) with typical retention current of 200 µA. Data retention time is indefinite under these conditions, and tCDR (chip deselect to retention mode) is 0 ns-ensuring immediate entry into low-power state upon CE assertion.

71V30L35TFI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 64-LQFP

Packaging:: Tray

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:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP (10x10)

71V30L35TFI FAQ

1.How can I place an order for 71V30L35TFI through Aetrix?

Please submit a Request for Quotation (RFQ) for 71V30L35TFI 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 71V30L35TFI reliable?

The price and inventory of 71V30L35TFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V30L35TFI is usually 5 days.

3.What payment methods are accepted for 71V30L35TFI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V30L35TFI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 71V30L35TFI?

71V30L35TFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 71V30L35TFI 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 71V30L35TFI?

For technical support, including 71V30L35TFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V30L35TFI requirements.

6.How does Aetrix verify that 71V30L35TFI is sourced from the original manufacturer or authorized distributors?

All 71V30L35TFI 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 71V30L35TFI meets industry standards.

7.What is the process for return or replacement of 71V30L35TFI?

All 71V30L35TFI units undergo pre-shipment inspection (PSI). If there is an issue with 71V30L35TFI, 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 71V30L35TFI part is unused and in its original packaging.

Return procedure for 71V30L35TFI:

1.Submit a request within 90 days.

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

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