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

Renesas 70V3579S4BC

Name: 70V3579S4BC
Brand: Renesas
SKU: 70V3579S4BC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V3579S4BC

Manufacturer:: Renesas

Category:: Memory

Package:: 256-LBGA

Datasheet:: 70V3579S4BC.pdf

Description:: IC SRAM 1.125MBIT PAR 256CABGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

70V3579S4BC from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 7.5 ns cycle time (133 MHz), true dual-port architecture enabling simultaneous read/write access to the same memory location, and independent 3.3 V or 2.5 V I/O voltage selection per port - used in high-bandwidth packet buffering and real-time DSP co-processor interfaces.

For engineers reviewing the 70V3579S4BC datasheet, 70V3579S4BC pinout, 70V3579S4BC application, or 70V3579S4BC equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation, dual-chip-enable depth expansion support, and confirmed PQFP-208 package mapping - critical for FPGA-to-ASIC bridging, telecom line card design, and deterministic latency memory subsystems.

Technical Context

The 70V3579S4BC implements full synchronous operation on both ports using edge-triggered registers for address, data, and control inputs, achieving 1.8 ns setup and 0.7 ns hold times at 133 MHz. Its self-timed write architecture eliminates external wait-state logic while maintaining 4.2 ns clock-to-data-out in pipelined mode.

It supports independent voltage configuration per port via OPTL/OPTR pins, allowing one port at 3.3 V and the other at 2.5 V - enabling seamless interfacing between legacy LVTTL and modern low-voltage logic domains without level shifters. The integrated address counter with ADS/CNTEN/CNTRST controls enables burst sequential access without external sequencing logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 36 bits - provides 1.152 Mbit of true dual-access storage for parallel data paths in networking and video processing.
Cycle Time (Pipelined)	7.5 ns - enables 133 MHz sustained operation with 9.6 Gbps aggregate bandwidth across both ports.
Access Time (tCD2)	4.2 ns max - guarantees sub-5 ns data valid window after clock edge, critical for tight-timing FPGA glue logic.
Supply Voltages	VDD = 3.3 V ± 150 mV (core); VDDQ = 3.3 V or 2.5 V per port - allows mixed-voltage system integration without external translators.
Operating Temperature	-40°C to +85°C - qualified for industrial embedded applications including base station equipment and motor control drives.
Power Consumption	ISB3 = 6–15 mA (full standby, CMOS inputs) - enables low-power idle states in always-on communication modules.
Package	208-pin Plastic Quad Flatpack (PQFP), 28 mm × 28 mm - compatible with standard surface-mount assembly and thermal management in dense PCB layouts.

Pinout & Package

208-pin PQFP package (DRG208), body size 28 mm × 28 mm × 3.5 mm, 0.65 mm lead pitch. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic levels (3.3 V if VIH, 2.5 V if VIL).

Pin/Terminal	Circuit Role	Design Meaning
CLKL / CLKR	Port-specific synchronous clock input	Edge-triggered register clock for all inputs/outputs on respective port; enables deterministic timing at 133 MHz.
A0L–A14L / A0R–A14R	15-bit address bus (left/right)	Directly selects one of 32K locations; ADSL/ADSR strobe allows address latching independent of counter mode.
I/O0L–I/O35L / I/O0R–I/O35R	36-bit bidirectional data bus (left/right)	Supports byte-wise access via BE0–BE3; each 9-bit byte can be written/read independently during single cycle.
CE0L/CE1L / CE0R/CE1R	Dual chip enable per port	Enables depth expansion: CE0 active + CE1 inactive selects device; both inactive places port in ultra-low-power standby.
OPTL / OPTR	I/O voltage option control	Configures VDDQL/VDDQR supply voltage (3.3 V or 2.5 V) - sets interface voltage level for corresponding port's I/Os and controls.
CNTRSTL / CNTRSTR	Address counter reset	Asynchronously resets internal address counter to 0; enables repeat burst access from start address without host intervention.

Key Features

Feature	Design Value
True dual-port memory cells	Enables concurrent read and write to identical address locations - essential for producer-consumer FIFOs and shared memory inter-processor communication.
Pipelined output mode	Delays output by one clock cycle to relax timing closure; reduces external logic burden in high-speed systems with tight skew budgets.
Separate byte enables (BE0–BE3)	Allows 9-bit granularity writes across 36-bit bus - supports partial updates without read-modify-write cycles, improving efficiency in protocol stack buffers.
Dual chip enables (CE0/CE1)	Permits seamless depth expansion up to 64K×36 or wider configurations using multiple devices - no external decoding logic required.
Self-timed write	Internally manages write pulse width and timing - eliminates need for external write-strobe generation or delay matching in FPGA-based controllers.
Independent I/O voltage selection	Each port configurable for 3.3 V or 2.5 V signaling - enables direct connection to heterogeneous logic families (e.g., 3.3 V FPGA core + 2.5 V ASIC interface).

Applications

Telecom Packet Buffering	FPGA-to-ASIC Bridging
Use Scenario: Storing incoming/outgoing Ethernet frames in a line card where ingress and egress paths operate concurrently. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared buffer between MAC-layer FPGA and PHY-layer ASIC, with left port handling RX and right port handling TX. Use Value: Simultaneous access eliminates arbitration overhead; 7.5 ns cycle time sustains 10 Gbps line-rate throughput with deterministic jitter < 1 ns.	Use Scenario: Interfacing a Xilinx Kintex FPGA (3.3 V I/O) to a TI C66x DSP (2.5 V I/O) in a radar signal processor. IC Role / Device Role / Timing Role: 70V3579S4BC serves as voltage-transparent memory bridge, with left port at 3.3 V and right port at 2.5 V. Use Value: Eliminates discrete level shifters; 4.2 ns tCD2 ensures sub-cycle data transfer alignment between asynchronous clock domains.
Real-Time DSP Co-Processing	Industrial Motion Control
Use Scenario: Sharing coefficient tables and intermediate results between two synchronized DSP cores executing parallel filter banks. IC Role / Device Role / Timing Role: Acts as low-latency shared memory with pipelined reads, supporting lock-step execution without cache coherency protocols. Use Value: 133 MHz operation enables >100 million MAC operations/sec; counter mode simplifies burst coefficient loading without address bus overhead.	Use Scenario: Storing position setpoints and encoder feedback in a servo drive where motion controller and PWM generator run on separate clocks. IC Role / Device Role / Timing Role: Provides deterministic, jitter-free data exchange between safety-critical motion CPU and real-time PWM engine. Use Value: Industrial temperature rating (-40°C to +85°C) and ISB3 < 15 mA ensure reliability in enclosed motor cabinets; dual CE enables safe power-gating during fault conditions.

Telecom Packet Buffering

FPGA-to-ASIC Bridging

Use Scenario: Storing incoming/outgoing Ethernet frames in a line card where ingress and egress paths operate concurrently.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared buffer between MAC-layer FPGA and PHY-layer ASIC, with left port handling RX and right port handling TX.

Use Value: Simultaneous access eliminates arbitration overhead; 7.5 ns cycle time sustains 10 Gbps line-rate throughput with deterministic jitter < 1 ns.

Use Scenario: Interfacing a Xilinx Kintex FPGA (3.3 V I/O) to a TI C66x DSP (2.5 V I/O) in a radar signal processor.

IC Role / Device Role / Timing Role: 70V3579S4BC serves as voltage-transparent memory bridge, with left port at 3.3 V and right port at 2.5 V.

Use Value: Eliminates discrete level shifters; 4.2 ns tCD2 ensures sub-cycle data transfer alignment between asynchronous clock domains.

Real-Time DSP Co-Processing

Industrial Motion Control

Use Scenario: Sharing coefficient tables and intermediate results between two synchronized DSP cores executing parallel filter banks.

IC Role / Device Role / Timing Role: Acts as low-latency shared memory with pipelined reads, supporting lock-step execution without cache coherency protocols.

Use Value: 133 MHz operation enables >100 million MAC operations/sec; counter mode simplifies burst coefficient loading without address bus overhead.

Use Scenario: Storing position setpoints and encoder feedback in a servo drive where motion controller and PWM generator run on separate clocks.

IC Role / Device Role / Timing Role: Provides deterministic, jitter-free data exchange between safety-critical motion CPU and real-time PWM engine.

Use Value: Industrial temperature rating (-40°C to +85°C) and ISB3 < 15 mA ensure reliability in enclosed motor cabinets; dual CE enables safe power-gating during fault conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-100AXC	32K × 36, 100 MHz max, 10 ns cycle time, only 3.3 V I/O, no OPT pin voltage selection	Lacks per-port voltage flexibility; requires external level translation when interfacing mixed-voltage subsystems	Select when system uses uniform 3.3 V logic and lower bandwidth (≤100 MHz) suffices; lower cost but less design flexibility.
AS7C33256PFS-10BIN	32K × 36, 10 ns cycle time, asynchronous dual-port (no pipelining), 3.3 V only, no address counter	No pipelined output or internal counter - increases FPGA logic utilization for burst control and timing margining	Choose for legacy designs requiring pin-compatible drop-in replacement where pipelining and counter features are unused.

Compared with CY7C1362BV33-100AXC and AS7C33256PFS-10BIN, the 70V3579S4BC uniquely delivers 133 MHz pipelined operation with per-port 2.5 V/3.3 V configurability and integrated address counter - reducing BOM count and FPGA resource usage in high-throughput, mixed-voltage embedded systems.

Availability

70V3579S4BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and FPGA-based signal processing applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.

Supply support for 70V3579S4BC 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The 70V3579S4BC belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic-latency, high-bandwidth memory sharing between heterogeneous processors, FPGAs, and ASICs in real-time systems.

FAQ

What is the maximum operating frequency of the 70V3579S4BC?

The 70V3579S4BC supports a maximum operating frequency of 133 MHz, achieved through its 7.5 ns clock cycle time in pipelined mode. This specification applies under commercial temperature conditions (0°C to +70°C) with VDD = 3.3 V ± 150 mV and proper termination. The 70V3579S4BC datasheet confirms this timing is guaranteed across all 208-pin PQFP units shipped under the S4 speed grade.

Does the 70V3579S4BC support independent voltage operation on each port?

Yes, the 70V3579S4BC supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V operation, while setting OPTR to VIL (0 V) configures the right port for 2.5 V operation - enabling direct interfacing with mixed-voltage systems without external level shifters. This capability is explicitly documented in the 70V3579S4BC datasheet section "Recommended Operating Conditions".

What package type is used for the 70V3579S4BC?

The 70V3579S4BC is packaged in a 208-pin Plastic Quad Flatpack (PQFP), designated DRG208, with dimensions of 28 mm × 28 mm × 3.5 mm and 0.65 mm lead pitch. This package is confirmed in the official IDT datasheet Figure "Pin Configuration - 208-Pin PQFP", and matches the ordering suffix 'BC' in the 70V3579S4BC part number.

How does the address counter function in the 70V3579S4BC?

The 70V3579S4BC includes an internal 15-bit address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising CLK edge, the counter advances automatically - eliminating need for external address increment logic. ADS = VIH disables external address latching, allowing continuous counter-driven sequential access. This behavior is fully specified in Truth Table II and Timing Waveform "Pipelined Read with Address Counter Advance" in the 70V3579S4BC datasheet.

Is the 70V3579S4BC rated for industrial temperature operation?

Yes, the 70V3579S4BC is qualified for industrial temperature operation from -40°C to +85°C. This rating is explicitly stated in the "Recommended Operating Temperature and Supply Voltage" table (Table 4) of the 70V3579S4BC datasheet, and applies to the S4 speed grade in the 208-pin PQFP package. Electrical characteristics including tCD2 ≤ 5 ns and ISB2 ≤ 260 mA are guaranteed across this full range.

70V3579S4BC Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 256-LBGA

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Synchronous

Memory Size:: 1.125Mbit

Memory Organization:: 32K x 36

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 4.2 ns

Voltage - Supply:: 3.15V ~ 3.45V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 256-CABGA (17x17)

70V3579S4BC FAQ

1.How can I place an order for 70V3579S4BC through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V3579S4BC 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 70V3579S4BC reliable?

The price and inventory of 70V3579S4BC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V3579S4BC is usually 5 days.

3.What payment methods are accepted for 70V3579S4BC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V3579S4BC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V3579S4BC?

70V3579S4BC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V3579S4BC 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 70V3579S4BC?

For technical support, including 70V3579S4BC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V3579S4BC requirements.

6.How does Aetrix verify that 70V3579S4BC is sourced from the original manufacturer or authorized distributors?

All 70V3579S4BC 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 70V3579S4BC meets industry standards.

7.What is the process for return or replacement of 70V3579S4BC?

All 70V3579S4BC units undergo pre-shipment inspection (PSI). If there is an issue with 70V3579S4BC, 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 70V3579S4BC part is unused and in its original packaging.

Return procedure for 70V3579S4BC:

1.Submit a request within 90 days.

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

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