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

Renesas 70V657S10DRG

Name: 70V657S10DRG
Brand: Renesas
SKU: 70V657S10DRG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V657S10DRG

Manufacturer:: Renesas

Category:: Memory

Package:: 208-BFQFP

Datasheet:: 70V657S10DRG.pdf

Description:: IC SRAM 1.125MBIT PAR 208PQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

70V657S10DRG 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. It supports simultaneous read/write to the same memory location and operates from a single 3.3 V core supply with selectable 3.3 V/2.5 V I/O voltage per port-used in real-time DSP co-processing, FPGA bridging, and high-throughput packet buffering.

For engineers reviewing the 70V657S10DRG datasheet, 70V657S10DRG pinout, 70V657S10DRG application, or 70V657S10DRG equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for system-level memory arbitration and bandwidth-critical dual-access designs.

Technical Context

The 70V657S10DRG implements true dual-port SRAM architecture with separate address, control, and bidirectional data buses for left (L) and right (R) ports-enabling fully asynchronous, concurrent access without external arbitration logic. Its on-chip semaphore logic supports eight shared flags via A0–A2 addressing, and BUSY flag signaling enables master/slave coordination during memory contention.

It features independent byte-enable controls (BE0–BE3 per port) for 9-bit granularity, JTAG IEEE 1149.1 compliance for boundary-scan testing, and automatic power-down when either CE0 or CE1 is deasserted. Address pins A15L/A16L and A15R/A16R are no-connects-confirming its 32K × 36 (1.152 Mbit) density, not 64K or 128K variants.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 36 bits (1.152 Mbit); A15/A16 pins NC confirms 32K depth, not 64K/128K
Access Time (tAA)	10 ns max (commercial grade); enables ≤100 MHz sustained dual-port throughput
Core Supply	3.3 V ±150 mV (VDD); fixed core voltage independent of I/O selection
I/O Voltage Support	Selectable 3.3 V or 2.5 V per port via OPTL/OPTR; allows mixed-voltage system interfacing
Operating Temperature	0°C to +70°C (commercial grade); specified for stable timing under DC bias only
Package	208-pin PQFP (DRG208); 28 mm × 28 mm body, 0.5 mm lead pitch
JTAG Compliance	IEEE 1149.1–compliant TAP controller with TDI/TDO/TCK/TMS/TRST pins

Pinout & Package

70V657S10DRG is packaged in a 208-pin Plastic Quad Flatpack (PQFP), designated DRG208. The package has 28 mm × 28 mm footprint, 3.5 mm height, and gull-wing leads compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A14L A0R–A14R	Address Inputs (Left/Right)	15-bit address bus per port; A15/A16 are NC per datasheet Note 1 & 2
I/O0L–I/O35L I/O0R–I/O35R	Bidirectional Data (36-bit)	Two independent 36-bit I/O buses; each supports byte-wise read/write via BE0–BE3
CE0L/CE1L CE0R/CE1R	Chip Enables	Dual CE per port enables depth expansion without external logic; CE0=VIL & CE1=VIH required for access
R/WL/R/WR OEL/OER	Read/Write & Output Enable	Asynchronous control: R/W determines direction; OE enables output drivers (not needed for write)
BE0L–BE3L BE0R–BE3R	Byte Enables (9-bit groups)	Four independent enables per port for selective 9-bit writes (e.g., BE0L=L writes I/O0L–I/O8L only)
SEML/SEMR INTL/INTR BUSYL/BUSYR	Semaphore, Interrupt, Busy Flags	Active-high totem-pole outputs; BUSY is output when M/S=VIH (Master), input when M/S=VIL (Slave)
M/S	Master/Slave Select	Configures device role: VIH = Master (BUSY output), VIL = Slave (BUSY input); critical for cascaded systems
OPTL/OPTR VDDQL/VDDQR	I/O Voltage Select & Supply	OPT=VDD → 3.3 V I/O; OPT=VSS → 2.5 V I/O; VDDQX must match selected level

Key Features

Feature	Design Value
True Dual-Port Architecture	Simultaneous independent read/write to identical addresses-eliminates external arbitration logic in real-time systems
On-Chip Semaphore Logic	Eight hardware semaphore flags accessible via A0–A2; enables deterministic resource sharing between processors/FPGAs
Configurable I/O Voltage	Per-port 3.3 V/2.5 V selection via OPT pins-supports mixed-voltage SoC interfaces without level shifters
Master/Slave Cascading	Single M/S pin configures BUSY as input/output; enables error-free 72+ bit wide memory expansion using multiple devices
JTAG Boundary-Scan Support	Fully compliant IEEE 1149.1 interface (TMS/TCK/TDI/TDO/TRST) for production test and debug visibility

Applications

Real-Time DSP Co-Processing	FPGA-to-Processor Bridging
Use Scenario: Two tightly coupled processors-one running control firmware, the other executing signal processing algorithms-share sensor data buffers with zero-latency handoff. IC Role / Device Role / Timing Role: 70V657S10DRG serves as a low-latency, contention-managed shared memory; BUSY and semaphore flags coordinate access without software overhead. Use Value: Eliminates polling or interrupt-based synchronization; 10 ns access ensures sub-microsecond inter-processor communication latency.	Use Scenario: An FPGA implements packet classification logic while an ARM processor handles TCP/IP stack; both require concurrent, deterministic access to frame metadata tables. IC Role / Device Role / Timing Role: 70V657S10DRG acts as a dual-access buffer with independent 36-bit buses-one connected to FPGA fabric, the other to processor AXI interface. Use Value: Prevents pipeline stalls during burst transfers; byte enables allow partial writes matching FPGA's 9-bit-wide datapath granularity.
High-Speed Network Packet Buffering	Industrial Motion Controller Memory
Use Scenario: Line-rate Ethernet switch ASIC buffers ingress/egress packets in parallel; one port ingests frames from MAC, the other feeds egress scheduler. IC Role / Device Role / Timing Role: 70V657S10DRG provides asynchronous, non-blocking memory with hardware BUSY arbitration to prevent overwrites during backpressure. Use Value: Sustains full wire-speed operation at 1 Gbps; 32K × 36 capacity holds ~1.4 MB of packet headers/metadata with zero software intervention.	Use Scenario: CNC machine controller synchronizes servo position updates (from motion IC) and HMI display refresh (from GUI processor) using shared trajectory data. IC Role / Device Role / Timing Role: 70V657S10DRG functions as deterministic shared RAM with semaphore-controlled access to motion profile segments. Use Value: Guarantees atomic updates to multi-axis interpolation tables; eliminates race conditions that cause positional jitter or servo fault triggers.

Real-Time DSP Co-Processing

FPGA-to-Processor Bridging

Use Scenario: Two tightly coupled processors-one running control firmware, the other executing signal processing algorithms-share sensor data buffers with zero-latency handoff.

IC Role / Device Role / Timing Role: 70V657S10DRG serves as a low-latency, contention-managed shared memory; BUSY and semaphore flags coordinate access without software overhead.

Use Value: Eliminates polling or interrupt-based synchronization; 10 ns access ensures sub-microsecond inter-processor communication latency.

Use Scenario: An FPGA implements packet classification logic while an ARM processor handles TCP/IP stack; both require concurrent, deterministic access to frame metadata tables.

IC Role / Device Role / Timing Role: 70V657S10DRG acts as a dual-access buffer with independent 36-bit buses-one connected to FPGA fabric, the other to processor AXI interface.

Use Value: Prevents pipeline stalls during burst transfers; byte enables allow partial writes matching FPGA's 9-bit-wide datapath granularity.

High-Speed Network Packet Buffering

Industrial Motion Controller Memory

Use Scenario: Line-rate Ethernet switch ASIC buffers ingress/egress packets in parallel; one port ingests frames from MAC, the other feeds egress scheduler.

IC Role / Device Role / Timing Role: 70V657S10DRG provides asynchronous, non-blocking memory with hardware BUSY arbitration to prevent overwrites during backpressure.

Use Value: Sustains full wire-speed operation at 1 Gbps; 32K × 36 capacity holds ~1.4 MB of packet headers/metadata with zero software intervention.

Use Scenario: CNC machine controller synchronizes servo position updates (from motion IC) and HMI display refresh (from GUI processor) using shared trajectory data.

IC Role / Device Role / Timing Role: 70V657S10DRG functions as deterministic shared RAM with semaphore-controlled access to motion profile segments.

Use Value: Guarantees atomic updates to multi-axis interpolation tables; eliminates race conditions that cause positional jitter or servo fault triggers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-10ZXC	32K × 36, 10 ns, 3.3 V core/I/O; no OPT-selectable I/O voltage; no JTAG; 256-ball BGA only	Lacks per-port I/O voltage flexibility and JTAG test support; requires PCB redesign for BGA layout	Choose if JTAG and mixed-voltage I/O are unnecessary and BGA packaging is preferred for density
IDT70V25S10PF	16K × 18, 10 ns, 3.3 V; single 18-bit port width; no semaphore logic; 100-pin TQFP	Half the data width and no hardware arbitration; suitable only for simpler point-to-point buffering	Choose only for cost-sensitive, lower-bandwidth applications where dual 36-bit width and semaphore are unused

Compared with CY7C1362BV33-10ZXC and IDT70V25S10PF, the 70V657S10DRG uniquely delivers per-port I/O voltage selection, integrated JTAG, and hardware semaphore-making it irreplaceable in mixed-voltage, test-critical, or multi-master deterministic systems.

Availability

70V657S10DRG is available at Aetrix Electronics and suitable for real-time DSP co-processing, FPGA-to-processor bridging, and high-speed network packet buffering requiring stable component supply across commercial temperature range.

Supply support for 70V657S10DRG 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The 70V657S10DRG belongs to IDT's high-speed asynchronous dual-port SRAM product line, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors, FPGAs, and ASICs in communications and industrial control.

FAQ

What is the exact memory density and organization of the 70V657S10DRG?

The 70V657S10DRG is a 32K × 36-bit asynchronous dual-port SRAM, totaling 1.152 Mbit. This is confirmed by datasheet Notes 1 and 2 stating A15L/A16L and A15R/A16R are no-connects-distinguishing it from the 64K (IDT70V658) and 128K (IDT70V659) variants in the same family. Its address space spans A0–A14 on both ports.

Does the 70V657S10DRG support JTAG boundary-scan, and which pins are used?

Yes, the 70V657S10DRG supports IEEE 1149.1 JTAG boundary-scan. Pins TDI (pin 1), TDO (pin 2), TCK (pin 3), TMS (pin 4), and TRST (pin 5) are dedicated to the JTAG interface and appear in the 208-pin PQFP pinout diagram. These enable production test and debug without requiring external test fixtures.

How does the BUSY flag operate in master vs. slave configuration on the 70V657S10DRG?

On the 70V657S10DRG, the BUSY flag behavior is controlled by the M/S pin: when M/S = VIH, BUSYL/BUSYR are totem-pole outputs indicating port contention; when M/S = VIL, they become inputs for daisy-chained slave devices. This is explicitly defined in datasheet Note 2 and Truth Table II, enabling flexible master/slave cascading.

Can both ports of the 70V657S10DRG operate at different I/O voltages simultaneously?

Yes-the 70V657S10DRG supports independent I/O voltage selection per port. OPTL sets left-port I/O voltage (3.3 V if tied to VDD, 2.5 V if tied to VSS); OPTR does the same for the right port. Datasheet Table 1 and Pin Names section confirm this per-port independence, allowing mixed-voltage interfacing without external level shifters.

What is the maximum operating frequency supported by the 70V657S10DRG's 10 ns access time?

The 10 ns access time (tAA) of the 70V657S10DRG corresponds to a maximum guaranteed read cycle rate of 100 MHz under commercial conditions (0°C to +70°C). This is derived directly from tRC = 10 ns in Table 12, and applies when CE, OE, and address are stable-enabling sustained dual-port throughput without wait states.

70V657S10DRG Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 208-BFQFP

Packaging:: Tray

Product Status:: Active

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)

70V657S10DRG FAQ

1.How can I place an order for 70V657S10DRG through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V657S10DRG 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 70V657S10DRG reliable?

The price and inventory of 70V657S10DRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V657S10DRG is usually 5 days.

3.What payment methods are accepted for 70V657S10DRG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V657S10DRG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V657S10DRG?

70V657S10DRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V657S10DRG 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 70V657S10DRG?

For technical support, including 70V657S10DRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V657S10DRG requirements.

6.How does Aetrix verify that 70V657S10DRG is sourced from the original manufacturer or authorized distributors?

All 70V657S10DRG 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 70V657S10DRG meets industry standards.

7.What is the process for return or replacement of 70V657S10DRG?

All 70V657S10DRG units undergo pre-shipment inspection (PSI). If there is an issue with 70V657S10DRG, 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 70V657S10DRG part is unused and in its original packaging.

Return procedure for 70V657S10DRG:

1.Submit a request within 90 days.

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

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