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

Renesas 70V05S35J

Name: 70V05S35J
Brand: Renesas
SKU: 70V05S35J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V05S35J

Manufacturer:: Renesas

Category:: Memory

Package:: 68-LCC (J-Lead)

Datasheet:: 70V05S35J.pdf

Description:: IC SRAM 64KBIT PARALLEL 68PLCC

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Product details

Overview

70V05S35J from IDT is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum access time (commercial grade), TTL-compatible I/O, and on-chip semaphore arbitration logic for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 70V05S35J datasheet, 70V05S35J pinout, 70V05S35J application, or 70V05S35J equivalent, key selection considerations include simultaneous read capability, BUSY/INT flag support, master/slave cascading for 16-bit bus expansion, and industrial-grade timing compatibility with 3.3V ±0.3V supply.

Technical Context

The 70V05S35J implements fully asynchronous dual-port architecture with separate address, control, and data buses per port-enabling concurrent read/write operations without external arbitration logic. Its on-chip port arbitration resolves contention via BUSY flag assertion and supports semaphore signaling across eight flags addressed by A0–A2.

It features automatic power-down per port via CE control, push-pull BUSY/INT outputs (not open-drain), and Master/Slave configuration using the M/S pin to enable error-free 16-bit+ memory expansion. The device operates at 3.3V only and requires no external voltage translation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	8K × 8 bits (64 Kbit total); enables direct byte-wide interfacing with 8-bit microcontrollers or as lower/upper byte in 16-bit systems.
Access Time (tAA)	35 ns max (commercial temp range); guarantees deterministic read latency for real-time control loops and high-throughput data buffering.
Supply Voltage	3.3 V ±0.3 V; eliminates need for level shifters when interfacing with modern 3.3V FPGAs, DSPs, or ARM-based processors.
Operating Temperature	0°C to +70°C (commercial grade); validated for use in office equipment, test instrumentation, and non-automotive industrial controllers.
Active Current (IDD)	115 mA typical at fMAX; enables predictable thermal design and low-noise power rail planning in dense PCB layouts.
Standby Current (ISB)	100 μA typical; supports low-power sleep modes in battery-backed or energy-conscious applications without data loss.
Package	64-pin TQFP (PNG64); surface-mount compatible with standard reflow profiles and automated assembly.

Pinout & Package

70V05S35J is packaged in a 64-pin thin quad flatpack (TQFP), measuring approximately 14 mm × 14 mm × 1.4 mm. All VDD pins require local 3.3V decoupling; all GND pins must be connected to a low-impedance ground plane.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A12L	Left port address inputs	13-bit address bus for left-side memory access; supports full 8K addressing without external decoding.
A0R–A12R	Right port address inputs	Independent 13-bit address bus enabling concurrent access to same or different locations from right port.
I/O0L–I/O7L	Left port bidirectional data	8-bit TTL-compatible data path; tri-stated during reads/writes controlled by OEL/R/WL/CEL.
I/O0R–I/O7R	Right port bidirectional data	Fully isolated 8-bit data path; no shared bus loading between ports ensures signal integrity in mixed-speed systems.
CEL / CER	Chip enable (left/right)	Active-low per-port enable; allows independent power gating of each port to reduce dynamic current consumption.
OEL / OER	Output enable (left/right)	Controls output drivers independently; enables selective data visibility without disabling memory access.
R/WL / R/WR	Read/write control (left/right)	Determines direction of data transfer per port; supports simultaneous read-read, read-write, or write-write operations.
BUSYL / BUSYR	Busy flag (left/right)	Push-pull output (master) or input (slave); signals port contention during address match or write collision.
INTL / INTR	Interrupt flag (left/right)	Open-collector compatible push-pull output; asserts on semaphore set/clear or user-defined address match events.
SEML / SEMR	Semaphore enable (left/right)	Selects semaphore register access mode; required to read/write the eight hardware semaphore flags (A0–A2 addressed).
M/S	Master/Slave select	VIL configures device as slave (BUSY input); VIH configures as master (BUSY output); enables daisy-chained multi-device systems.
VDD / VSS	Power / Ground	Multiple dedicated VDD/VSS pins ensure low-impedance supply distribution and minimize switching noise coupling between ports.

Key Features

Feature	Design Value
True dual-port architecture	Enables simultaneous, independent read/write access from two processors or cores without arbitration overhead or wait states.
On-chip semaphore logic	Provides eight hardware-managed synchronization flags (addressed by A0–A2), eliminating software polling or external lock circuits.
Master/Slave cascading	Supports seamless 16-bit or wider data bus expansion using M/S pin; no external glue logic required for width scaling.
Per-port power-down	CE-controlled standby reduces active current to <100 μA per port, extending battery life in portable or remote monitoring devices.
Push-pull BUSY/INT outputs	Eliminates need for external pull-ups; ensures fast, deterministic flag assertion (<3 ns rise/fall) for hard real-time response.

Applications

Industrial Motion Controller	Medical Imaging Buffer
Use Scenario: Dual-CPU architecture where one processor handles servo loop execution while the other manages HMI and network stack. IC Role / Device Role / Timing Role: Shared memory buffer with atomic semaphore coordination between CPUs; provides deterministic 35 ns read latency for position feedback updates. Use Value: Eliminates software mutex delays and guarantees sub-50 ns inter-processor handshaking for jitter-free motion profiling.	Use Scenario: Real-time acquisition of ultrasound frame data streamed from ADC array into DDR buffer, while DSP processes prior frames. IC Role / Device Role / Timing Role: High-bandwidth dual-port SRAM acting as ping-pong frame buffer; left port accepts raw pixel data, right port feeds processed frames to display engine. Use Value: Enables continuous 120 MB/s data throughput with zero-cycle interlock, preventing frame drop during peak acquisition bursts.
Avionics Data Concentrator	Test & Measurement Pattern Generator
Use Scenario: ARINC 429 bus interface module aggregating sensor inputs and formatting messages for flight management system. IC Role / Device Role / Timing Role: Dual-port memory used for time-stamped message queuing; left port writes timestamped packets from receiver FIFO, right port reads for transmission scheduling. Use Value: Guarantees atomic packet insertion and retrieval under 35 ns latency, meeting DO-254 deterministic timing requirements.	Use Scenario: High-speed digital pattern generator requiring precise waveform sequencing with real-time parameter updates from host PC. IC Role / Device Role / Timing Role: Stores 8K deep waveform patterns; left port loads new segments via PCIe bridge, right port streams patterns to DAC at 100 MHz clock rate. Use Value: Allows uninterrupted waveform playback during background segment reload, achieving 100% duty cycle without glitches or gaps.

Industrial Motion Controller

Medical Imaging Buffer

Use Scenario: Dual-CPU architecture where one processor handles servo loop execution while the other manages HMI and network stack.

IC Role / Device Role / Timing Role: Shared memory buffer with atomic semaphore coordination between CPUs; provides deterministic 35 ns read latency for position feedback updates.

Use Value: Eliminates software mutex delays and guarantees sub-50 ns inter-processor handshaking for jitter-free motion profiling.

Use Scenario: Real-time acquisition of ultrasound frame data streamed from ADC array into DDR buffer, while DSP processes prior frames.

IC Role / Device Role / Timing Role: High-bandwidth dual-port SRAM acting as ping-pong frame buffer; left port accepts raw pixel data, right port feeds processed frames to display engine.

Use Value: Enables continuous 120 MB/s data throughput with zero-cycle interlock, preventing frame drop during peak acquisition bursts.

Avionics Data Concentrator

Test & Measurement Pattern Generator

Use Scenario: ARINC 429 bus interface module aggregating sensor inputs and formatting messages for flight management system.

IC Role / Device Role / Timing Role: Dual-port memory used for time-stamped message queuing; left port writes timestamped packets from receiver FIFO, right port reads for transmission scheduling.

Use Value: Guarantees atomic packet insertion and retrieval under 35 ns latency, meeting DO-254 deterministic timing requirements.

Use Scenario: High-speed digital pattern generator requiring precise waveform sequencing with real-time parameter updates from host PC.

IC Role / Device Role / Timing Role: Stores 8K deep waveform patterns; left port loads new segments via PCIe bridge, right port streams patterns to DAC at 100 MHz clock rate.

Use Value: Allows uninterrupted waveform playback during background segment reload, achieving 100% duty cycle without glitches or gaps.

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	3.3V 8K × 16 organization; 35 ns access; 100-pin TQFP; no built-in semaphore logic.	Requires external logic for inter-processor sync; better suited for wide-bus systems needing 16-bit native width.	Select when 16-bit data path is mandatory and semaphore functionality can be implemented externally.
IDT70V25L25PF	3.3V 16K × 16; 25 ns access; 100-pin TQFP; includes semaphores but lacks M/S cascading support.	Higher density and speed, but no master/slave chaining; limited to single-device 16-bit implementations.	Choose for higher bandwidth needs where bus expansion is handled via FPGA or ASIC logic.

Compared with CY7C024AV-35AXC and IDT70V25L25PF, the 70V05S35J uniquely combines 8K × 8 organization, integrated semaphores, and M/S cascading in a compact 64-pin TQFP-making it optimal for cost-sensitive, space-constrained dual-CPU designs requiring atomic synchronization without external components.

Availability

70V05S35J is available at Aetrix Electronics and suitable for industrial motion controllers, medical imaging buffers, avionics data concentrators, and test & measurement pattern generators requiring stable component supply and long-term production continuity.

Supply support for 70V05S35J 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 timing, memory interface, and RF solutions before its acquisition by Renesas in 2019. Its dual-port SRAM portfolio targeted high-reliability embedded systems.

The 70V05S35J belongs to IDT's 70V05 family of high-speed 3.3V dual-port SRAMs, designed specifically for real-time inter-processor communication in industrial automation, medical equipment, and aerospace subsystems where deterministic latency and hardware synchronization are critical.

FAQ

What is the maximum operating temperature range for the 70V05S35J?

The 70V05S35J is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial (-40°C to +85°C) or extended temperature ranges. For designs requiring wider thermal tolerance, the 70V05L variant (e.g., 70V05L35J) should be considered, as explicitly documented in the datasheet's ordering information section.

Does the 70V05S35J support true simultaneous read operations from both ports to the same memory location?

Yes, the 70V05S35J implements true dual-ported memory cells that allow simultaneous reads of the same memory location without contention or arbitration delay. This behavior is guaranteed per the functional description and truth table I in the official datasheet, and does not require BUSY flag monitoring during co-access.

How is semaphore functionality implemented in the 70V05S35J?

The 70V05S35J includes eight hardware semaphore flags accessed via I/O0–I/O7 and addressed by A0–A2. Semaphore read/write is enabled by setting SEM = VIL while CE = VIH. This dedicated mode isolates semaphore registers from main memory, ensuring atomic lock/unlock operations without affecting data array integrity.

Can the 70V05S35J be used in a 16-bit data bus configuration?

Yes-the 70V05S35J supports 16-bit expansion via Master/Slave cascading. When configured as master (M/S = VIH), BUSY output coordinates timing with a slave device (M/S = VIL); two 70V05S35J units provide full 16-bit width with no external logic, as confirmed in the datasheet's "IDT MASTER/SLAVE Dual-Port SRAM approach" description.

What package type is used for the 70V05S35J, and are there alternative packages available for this speed grade?

The 70V05S35J uses a 64-pin TQFP (PNG64) package, as specified in the Pin Configurations section. While the 70V05 family also offers 68-pin PLCC and PGA variants, the 'S' speed grade (35 ns) is only documented for the TQFP option in the provided datasheet-no PLCC or PGA variants are listed for the S35 speed bin.

70V05S35J Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 68-LCC (J-Lead)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 64Kbit

Memory Organization:: 8K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 35ns

Access Time:: 35 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 68-PLCC (24.21x24.21)

70V05S35J FAQ

1.How can I place an order for 70V05S35J through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V05S35J 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 70V05S35J reliable?

The price and inventory of 70V05S35J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05S35J is usually 5 days.

3.What payment methods are accepted for 70V05S35J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05S35J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V05S35J?

70V05S35J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V05S35J 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 70V05S35J?

For technical support, including 70V05S35J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05S35J requirements.

6.How does Aetrix verify that 70V05S35J is sourced from the original manufacturer or authorized distributors?

All 70V05S35J 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 70V05S35J meets industry standards.

7.What is the process for return or replacement of 70V05S35J?

All 70V05S35J units undergo pre-shipment inspection (PSI). If there is an issue with 70V05S35J, 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 70V05S35J part is unused and in its original packaging.

Return procedure for 70V05S35J:

1.Submit a request within 90 days.

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

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