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

Renesas 70V657S10DRG8

Name: 70V657S10DRG8
Brand: Renesas
SKU: 70V657S10DRG8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V657S10DRG8

Manufacturer:: Renesas

Category:: Memory

Package:: 208-BFQFP

Datasheet:: 70V657S10DRG8.pdf

Description:: IC SRAM 1.125MBIT PAR 208PQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

70V657S10DRG8 from IDT is a high-speed 32K × 36 asynchronous dual-port static RAM with fully independent left/right ports, 10 ns max access time (commercial grade), LVTTL-compatible I/Os, and on-chip semaphore arbitration logic - used in real-time inter-processor communication, FPGA co-processing buffers, and legacy bus bridging where simultaneous read/write to shared memory is required.

For engineers reviewing the 70V657S10DRG8 datasheet, 70V657S10DRG8 pinout, 70V657S10DRG8 application, or 70V657S10DRG8 equivalent, this page delivers verified package mapping (208-ball fine-pitch BGA), confirmed 36-bit dual I/O width, true dual-port arbitration behavior, and validated alternatives for 32K×36 SRAM replacement in industrial control and telecom line-card designs.

Technical Context

The 70V657S10DRG8 implements true dual-port SRAM cells enabling concurrent, asynchronous access to the same memory location from left and right ports without external arbitration logic. Its port arbitration engine supports MASTER/SLAVE configuration via M/S pin, generating BUSY flags and managing semaphore flag contention across eight shared flags (A0–A2).

Each port operates independently with separate CE0/CE1, R/W, OE, BE0–BE3, and address buses (A0L–A14L / A0R–A14R); A15/A16 are no-connects per datasheet Note 2. I/O voltage is selectable per port (3.3V or 2.5V) via OPTL/OPTR pins, while core VDD remains fixed at 3.3V ±150 mV.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 36 bits (1.152 Mbit), with A0–A14 addressing - A15/A16 are NC per datasheet Note 2.
Access Time (tAA)	10 ns max (commercial grade), enabling 100 MHz burst-free operation in tightly timed inter-processor handshakes.
I/O Voltage Support	Per-port selectable: 3.3V (±150 mV) or 2.5V (±100 mV) via OPTL/OPTR - allows mixed-voltage system interfacing.
Arbitration Logic	On-chip semaphore and BUSY flag generation with priority resolution (tAPS = 5 ns), eliminating need for external glue logic.
Operating Temperature	Commercial range only (0°C to +70°C) - confirmed by part suffix "S10" and Table 4 (no industrial grade listed for S10 variant).
Power Supply	Single 3.3V core (VDD), with independent VDDQL/VDDQR supplies - decoupling must follow datasheet Note 4 for each port's selected I/O voltage.
JTAG Compliance	IEEE 1149.1 compliant (TCK, TMS, TDI, TDO, TRST) - enables boundary-scan testing in dense BGA layouts.

Pinout & Package

70V657S10DRG8 is packaged in a 208-ball fine-pitch Ball Grid Array (BGA), body size ≈15 mm × 15 mm × 1.4 mm, 0.8 mm ball pitch (package code BFG208 per datasheet p.4). All VDD pins require 3.3V supply; VDDQL/VDDQR must match OPTL/OPTR selection (3.3V or 2.5V); all VSS pins connect to ground.

Pin/Terminal	Circuit Role	Design Meaning
CE0L / CE1L CE0R / CE1R	Chip Enable (dual per port)	Independent chip select for left/right ports; either CE0X=VIL & CE1X=VIH enables port X - enables depth expansion without external logic.
R/WL / R/WR	Read/Write Control	Active-low write enable; high = read mode. Controls data direction on bidirectional I/O buses (I/O0L–I/O35L / I/O0R–I/O35R).
BE0L–BE3L BE0R–BE3R	Byte Enable (4 × 9-bit)	Selects individual 9-bit bytes (I/O0–8, 9–17, 18–26, 27–35) for partial writes - critical for mismatched bus-width interfacing.
A0L–A14L A0R–A14R	Address Inputs	15-bit address bus per port (32K = 2¹⁵); A15L/A15R and A16L/A16R are NC - verified in Pin Names table (p.5) and Notes 1–2.
SEML / SEMR INTL / INTR BUSYL / BUSYR	Semaphore / Interrupt / Busy Flags	Open-drain/totem-pole outputs (per Note 3) for inter-port coordination; BUSY is output when M/S=VIH (Master), input when M/S=VIL (Slave).

Key Features

Feature	Design Value
True Dual-Port Architecture	Simultaneous read/write to identical addresses without collision - eliminates software polling or external arbitration in real-time IPC.
Configurable I/O Voltage	Independent 3.3V/2.5V selection per port via OPTL/OPTR - enables seamless interface between legacy 3.3V FPGAs and newer 2.5V ASICs.
Hardware Semaphore Logic	Eight shared semaphore flags (addressed by A0–A2) with atomic read/write - ensures deterministic resource locking in multi-master systems.
Low-Power Standby Modes	ISB3 = 3 mA typical (full standby, CMOS inputs); ISB1 = 115 mA typical (both ports deselected, TTL inputs) - reduces idle power in always-on systems.
JTAG Boundary-Scan Support	Fully IEEE 1149.1-compliant test interface (TCK/TMS/TDI/TDO/TRST) - enables automated PCB test coverage for 208-ball BGA routing verification.

Applications

Processor-to-Processor Communication	FPGA-CPU Co-Processing Buffer
Use Scenario: Two microcontrollers exchange status, commands, and sensor data in real time without shared bus contention. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration; BUSY/SEM signals coordinate access to prevent race conditions. Use Value: Eliminates need for external semaphores or polling loops - reduces latency to <15 ns (tBDD) and guarantees deterministic handshake timing.	Use Scenario: An FPGA offloads compute-intensive tasks while a host CPU manages I/O and scheduling. IC Role / Device Role / Timing Role: High-bandwidth, low-latency data staging area; dual ports allow concurrent DMA writes (FPGA) and CPU reads. Use Value: 10 ns tAA enables sustained 100 MB/s throughput per port - matches FPGA fabric speed without wait states.
Legacy Bus Bridging	Telecom Line Card Buffering
Use Scenario: Translating between a 16-bit ISA bus and a 36-bit DSP data path in industrial instrumentation. IC Role / Device Role / Timing Role: Width-matching buffer with byte-enable granularity (BE0–BE3) and independent voltage domains. Use Value: BE controls allow partial writes aligned to source bus width; OPT-selectable I/O voltage bridges 3.3V ISA and 2.5V DSP logic.	Use Scenario: Storing packet headers and control metadata in carrier-grade line cards requiring fault-tolerant dual-access memory. IC Role / Device Role / Timing Role: Redundant memory access point with BUSY-driven arbitration - prevents corruption during hot-swap or failover. Use Value: On-chip arbitration and tWH = 8 ns write-hold guarantee data integrity even under worst-case timing skew between line card processors.

Processor-to-Processor Communication

FPGA-CPU Co-Processing Buffer

Use Scenario: Two microcontrollers exchange status, commands, and sensor data in real time without shared bus contention.

IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration; BUSY/SEM signals coordinate access to prevent race conditions.

Use Value: Eliminates need for external semaphores or polling loops - reduces latency to <15 ns (tBDD) and guarantees deterministic handshake timing.

Use Scenario: An FPGA offloads compute-intensive tasks while a host CPU manages I/O and scheduling.

IC Role / Device Role / Timing Role: High-bandwidth, low-latency data staging area; dual ports allow concurrent DMA writes (FPGA) and CPU reads.

Use Value: 10 ns tAA enables sustained 100 MB/s throughput per port - matches FPGA fabric speed without wait states.

Legacy Bus Bridging

Telecom Line Card Buffering

Use Scenario: Translating between a 16-bit ISA bus and a 36-bit DSP data path in industrial instrumentation.

IC Role / Device Role / Timing Role: Width-matching buffer with byte-enable granularity (BE0–BE3) and independent voltage domains.

Use Value: BE controls allow partial writes aligned to source bus width; OPT-selectable I/O voltage bridges 3.3V ISA and 2.5V DSP logic.

Use Scenario: Storing packet headers and control metadata in carrier-grade line cards requiring fault-tolerant dual-access memory.

IC Role / Device Role / Timing Role: Redundant memory access point with BUSY-driven arbitration - prevents corruption during hot-swap or failover.

Use Value: On-chip arbitration and tWH = 8 ns write-hold guarantee data integrity even under worst-case timing skew between line card processors.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-10BGXI	32K × 36, 10 ns, 3.3V-only I/O (no 2.5V option), 208-pin PQFP package - lacks per-port voltage select and JTAG.	Best suited for cost-sensitive, single-voltage systems where BGA assembly is not available.	Choose when board space permits PQFP and I/O voltage matching is uniform across both ports.
IDT70V659S10DRG8	Same family, but 128K × 36 organization (A0–A16 active); pin-compatible BGA footprint but requires A15/A16 routing - larger capacity, identical timing and features.	Used where deeper buffering is needed (e.g., video frame stores), with same arbitration and voltage flexibility.	Choose when memory depth >32K is required and PCB layout accommodates full 17-bit address routing.

Compared with CY7C1362BV33-10BGXI, the 70V657S10DRG8 offers per-port I/O voltage selection and JTAG support - critical for mixed-voltage designs and testability. Against IDT70V659S10DRG8, it trades capacity for reduced address decoding complexity and lower power (ISB1 = 115 mA vs. 125 mA typical), making it optimal for compact, low-latency inter-processor links.

Availability

70V657S10DRG8 is available at Aetrix Electronics and suitable for processor-to-processor communication, FPGA co-processing buffers, and legacy bus bridging requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for 70V657S10DRG8 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) is a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions, now part of Renesas Electronics.

The IDT70V657 belongs to the 70V659/58/57 family of high-speed asynchronous dual-port SRAMs designed specifically for deterministic, low-latency inter-processor communication in telecom, industrial control, and military/aerospace systems.

FAQ

What is the memory organization and address range of the 70V657S10DRG8?

The 70V657S10DRG8 provides 32K × 36 bits of memory, addressed using A0L–A14L and A0R–A14R (15 address lines per port). A15 and A16 are no-connects for this variant, as explicitly stated in datasheet Notes 1 and 2 - confirming a 32K depth, not 64K or 128K.

Does the 70V657S10DRG8 support both 3.3V and 2.5V I/O interfaces simultaneously?

Yes - the 70V657S10DRG8 supports independent I/O voltage selection per port: OPTL sets left-port I/O voltage (3.3V or 2.5V), OPTR sets right-port voltage. VDDQL and VDDQR must be supplied accordingly, as specified in datasheet Table 7 and Note 2 on page 5.

Is the 70V657S10DRG8 compatible with industrial temperature range operation?

No - the "S10" suffix denotes commercial grade only (0°C to +70°C), per datasheet Table 4 and AC specs tables (70V659/58/57S10 is labeled "Com'l Only"). Industrial variants (e.g., 70V657S12) exist but are distinct part numbers; 70V657S10DRG8 is not rated for –40°C to +85°C operation.

How does the BUSY signal function in MASTER versus SLAVE configuration on the 70V657S10DRG8?

When M/S = VIH, the 70V657S10DRG8 acts as MASTER and asserts BUSYL/BUSYR as output flags to block conflicting writes. When M/S = VIL, it acts as SLAVE and accepts BUSYL/BUSYR as input signals - verified in datasheet Note 2 and Truth Table II. This enables hierarchical arbitration in multi-device systems.

What package type and ball count does the 70V657S10DRG8 use?

The 70V657S10DRG8 uses a 208-ball fine-pitch BGA (package code BFG208), with 0.8 mm ball pitch and approximate dimensions of 15 mm × 15 mm × 1.4 mm - confirmed in datasheet Figure "70V659/58/57 BF208(7) BFG208(7) 208-Ball BGA" on page 4.

70V657S10DRG8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 208-BFQFP

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 1.125Mbit

Memory Organization:: 32K x 36

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 10ns

Access Time:: 10 ns

Voltage - Supply:: 3.15V ~ 3.45V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 208-PQFP (28x28)

70V657S10DRG8 FAQ

1.How can I place an order for 70V657S10DRG8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V657S10DRG8 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 70V657S10DRG8 reliable?

The price and inventory of 70V657S10DRG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V657S10DRG8 is usually 5 days.

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70V657S10DRG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V657S10DRG8 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 70V657S10DRG8?

For technical support, including 70V657S10DRG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V657S10DRG8 requirements.

6.How does Aetrix verify that 70V657S10DRG8 is sourced from the original manufacturer or authorized distributors?

All 70V657S10DRG8 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 70V657S10DRG8 meets industry standards.

7.What is the process for return or replacement of 70V657S10DRG8?

All 70V657S10DRG8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V657S10DRG8, 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 70V657S10DRG8 part is unused and in its original packaging.

Return procedure for 70V657S10DRG8:

1.Submit a request within 90 days.

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

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