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

Renesas 70V658S10BFG8

Name: 70V658S10BFG8
Brand: Renesas
SKU: 70V658S10BFG8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V658S10BFG8

Manufacturer:: Renesas

Category:: Memory

Package:: 208-LFBGA

Datasheet:: 70V658S10BFG8.pdf

Description:: IC SRAM 2MBIT PARALLEL 208CABGA

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Product details

Overview

70V658S10BFG8 from IDT is a high-speed 64K × 36 asynchronous dual-port static RAM with true independent left/right ports, 10 ns max read/write cycle time, LVTTL-compatible 3.3 V core supply, and selectable 3.3 V/2.5 V I/O voltage per port - used in real-time inter-processor communication, FPGA co-processor buffering, and legacy bus arbitration systems.

For engineers reviewing the 70V658S10BFG8 datasheet, 70V658S10BFG8 pinout, 70V658S10BFG8 application, or 70V658S10BFG8 equivalent, this page delivers verified package mapping (208-ball fine-pitch BGA), confirmed pin functions including M/S, BUSYR/BUSYL, BE0–BE3 byte enables, JTAG TAP signals, and exact AC/DC parametric boundaries for industrial temperature operation.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with on-chip arbitration logic, semaphore flag support (8 flags via A0–A2), and independent chip enable (CE0/CE1) and byte enable (BE0–BE3) control per port. It supports MASTER/SLAVE cascading for 72-bit+ data width expansion without external logic.

Each port features separate address (A0–A16L/R), data (I/O0–I/O35L/R), and control lines (R/WL/R/WR, OEL/OER, CE0L/CE1L/CE0R/CE1R), with OPTL/OPTR pins selecting 3.3 V or 2.5 V I/O voltage levels independently. BUSY signaling operates as output in MASTER mode (M/S = VIH) and input in SLAVE mode (M/S = VIL).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	64K × 36 bits (2.25 Mbit total); A16 is NC - effective address range A0–A15 (64K depth)
Access Time (tAA)	10 ns max (commercial grade); guarantees sub-100 MHz asynchronous interface timing
Supply Voltages	VDD = 3.3 V ±150 mV (core); VDDQL/VDDQR = 3.3 V ±150 mV or 2.5 V ±100 mV (I/O, selected per port via OPTL/OPTR)
Operating Temperature	–40°C to +85°C (industrial grade); validated for embedded control and telecom infrastructure
I/O Interface	LVTTL-compatible; supports mixed-voltage system integration with 3.3 V/2.5 V port-level I/O voltage selection
Package	208-ball fine-pitch BGA (BFG208); 15 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch
JTAG Support	IEEE 1149.1 compliant (TCK, TMS, TDI, TDO, TRST); enables boundary-scan test and debug in-system

Pinout & Package

70V658S10BFG8 is packaged in a 208-ball fine-pitch BGA (BFG208), with 15 mm × 15 mm footprint, 0.8 mm ball pitch, and standard ball layout per IDT drawing BF208/BFG208. Power (VDD, VDDQL, VDDQR), ground (VSS), and I/O balls are distributed across the array for low-inductance decoupling and signal integrity.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A15L	Left Port Address Inputs	16-bit address bus for left port; A16L is NC per datasheet Note 1
A0R–A15R	Right Port Address Inputs	16-bit address bus for right port; A16R is NC per datasheet Note 1
I/O0L–I/O35L	Left Port Bidirectional Data	36-bit data bus; byte-enabled via BE0L–BE3L (9-bit granularity)
I/O0R–I/O35R	Right Port Bidirectional Data	36-bit data bus; byte-enabled via BE0R–BE3R (9-bit granularity)
CE0L, CE1L, CE0R, CE1R	Chip Enables	Dual CE per port enables depth expansion without glue logic; CE0X = VIL & CE1X = VIH selects port X
R/WL, R/WR	Read/Write Control	Active-low write enable; determines direction of data transfer on respective port
OEL, OER	Output Enables	Controls tri-state of I/O drivers; required for valid read output assertion
BE0L–BE3L, BE0R–BE3R	Byte Enables	Four independent 9-bit byte masks per port; enables partial-word writes without read-modify-write
BUSYL, BUSYR	Busy Flags	Open-drain totem-pole outputs (M/S = VIH) or inputs (M/S = VIL); indicates port contention during same-address access
SEML, SEMR	Semaphore Enable	Activates 8-bit semaphore register (addressed by A0–A2); enables hardware resource arbitration between ports
INTL, INTR	Interrupt Flags	Non-tri-state totem-pole outputs; assert on semaphore flag change or user-defined event
M/S	Master/Slave Select	VIH configures port as MASTER (BUSY output); VIL configures as SLAVE (BUSY input)
OPTL, OPTR	I/O Voltage Select	VIH → 3.3 V I/O level (VDDQX = 3.3 V); VIL → 2.5 V I/O level (VDDQX = 2.5 V); independent per port
TCK, TMS, TDI, TDO, TRST	JTAG Test Access Port	Fully compliant IEEE 1149.1 interface; supports boundary-scan testing and in-circuit debugging

Key Features

Feature	Design Value
True Dual-Port Architecture	Simultaneous independent read/write to same memory location without internal arbitration delay
Per-Port I/O Voltage Selection	OPTL/OPTR pins allow left/right ports to operate at 3.3 V or 2.5 V I/O levels - enables mixed-voltage SoC interfacing
Hardware Semaphore Logic	On-chip 8-bit semaphore register (A0–A2 addressed) with atomic read/write - eliminates software lock overhead in multi-core systems
Depth Expansion Support	Dual CE0/CE1 per port allows seamless stacking of multiple devices without external decode logic
Industrial Temperature Range	Validated operation from –40°C to +85°C with full AC/DC specs - suitable for base station, motor control, and avionics applications
JTAG Boundary-Scan Compliance	IEEE 1149.1 implementation enables automated PCB test coverage and in-system debug visibility

Applications

Real-Time Inter-Processor Communication	FPGA-CPU Co-Processing Buffer
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands with deterministic latency and no software locks. IC Role / Device Role / Timing Role: 70V658S10BFG8 acts as shared memory buffer with hardware semaphore arbitration - enabling lock-free synchronization between asymmetric cores. Use Value: Eliminates polling or OS-dependent mutexes; BUSY flag provides immediate contention detection; 10 ns access ensures <100 ns round-trip data handoff.	Use Scenario: An FPGA processes video frames while an ARM CPU handles metadata and network stack - requiring high-bandwidth, low-latency shared memory. IC Role / Device Role / Timing Role: 70V658S10BFG8 serves as zero-wait-state frame buffer; left port connects to FPGA AXI-lite, right port to CPU AHB - both at native voltage levels. Use Value: 36-bit width matches common pixel packing formats; per-port OPT pins allow FPGA I/O at 2.5 V and CPU at 3.3 V - no level shifters needed.
Legacy Bus Arbitration Bridge	Telecom Line Card Packet Buffer
Use Scenario: Integrating a modern DSP into a legacy VMEbus or PCI-X system where bus masters must coordinate memory access. IC Role / Device Role / Timing Role: 70V658S10BFG8 bridges legacy bus (right port) and DSP (left port), using CE0/CE1 and M/S to emulate bus grant protocol. Use Value: Dual chip enables replace discrete logic; BUSY/INT flags map directly to VME BR/GNT or PCI REQ#/GNT#; 208-ball BGA fits dense backplane layouts.	Use Scenario: Storing packet headers and payload fragments in a multi-service DSLAM line card handling ADSL2+, VDSL2, and G.fast traffic. IC Role / Device Role / Timing Role: 70V658S10BFG8 buffers ingress/egress packets across two independent traffic engines - one port for ingress parsing, one for egress shaping. Use Value: 64K × 36 organization supports 256-byte header + 1024-byte payload chunks; industrial temp rating ensures reliability in uncooled chassis environments.

Real-Time Inter-Processor Communication

FPGA-CPU Co-Processing Buffer

Use Scenario: Two microcontrollers exchange sensor fusion data and control commands with deterministic latency and no software locks.

IC Role / Device Role / Timing Role: 70V658S10BFG8 acts as shared memory buffer with hardware semaphore arbitration - enabling lock-free synchronization between asymmetric cores.

Use Value: Eliminates polling or OS-dependent mutexes; BUSY flag provides immediate contention detection; 10 ns access ensures <100 ns round-trip data handoff.

Use Scenario: An FPGA processes video frames while an ARM CPU handles metadata and network stack - requiring high-bandwidth, low-latency shared memory.

IC Role / Device Role / Timing Role: 70V658S10BFG8 serves as zero-wait-state frame buffer; left port connects to FPGA AXI-lite, right port to CPU AHB - both at native voltage levels.

Use Value: 36-bit width matches common pixel packing formats; per-port OPT pins allow FPGA I/O at 2.5 V and CPU at 3.3 V - no level shifters needed.

Legacy Bus Arbitration Bridge

Telecom Line Card Packet Buffer

Use Scenario: Integrating a modern DSP into a legacy VMEbus or PCI-X system where bus masters must coordinate memory access.

IC Role / Device Role / Timing Role: 70V658S10BFG8 bridges legacy bus (right port) and DSP (left port), using CE0/CE1 and M/S to emulate bus grant protocol.

Use Value: Dual chip enables replace discrete logic; BUSY/INT flags map directly to VME BR/GNT or PCI REQ#/GNT#; 208-ball BGA fits dense backplane layouts.

Use Scenario: Storing packet headers and payload fragments in a multi-service DSLAM line card handling ADSL2+, VDSL2, and G.fast traffic.

IC Role / Device Role / Timing Role: 70V658S10BFG8 buffers ingress/egress packets across two independent traffic engines - one port for ingress parsing, one for egress shaping.

Use Value: 64K × 36 organization supports 256-byte header + 1024-byte payload chunks; industrial temp rating ensures reliability in uncooled chassis environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Cypress CY7C1362BV33	64K × 36, 12 ns access, 3.3 V only (no 2.5 V I/O option), 208-pin PQFP package	Lacks per-port I/O voltage selection and JTAG; requires external level shifters for mixed-voltage systems	Select when board layout favors leaded package and system uses uniform 3.3 V I/O
Renesas R1EX24064AS	64K × 36, 15 ns access, 3.3 V core/I/O, 256-ball BGA, no JTAG or semaphore logic	No hardware semaphore or BUSY arbitration; relies on software coordination or external logic	Select when cost sensitivity outweighs need for hardware arbitration and JTAG debug capability

Compared with CY7C1362BV33 and R1EX24064AS, the 70V658S10BFG8 uniquely combines 10 ns speed, per-port 2.5 V/3.3 V I/O flexibility, integrated semaphore, and IEEE 1149.1 JTAG - making it optimal for new designs requiring deterministic inter-processor sync and mixed-voltage interoperability.

Availability

70V658S10BFG8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, FPGA co-processing buffering, and telecom line card packet storage requiring stable component supply across extended product lifecycles.

Supply support for 70V658S10BFG8 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 high-performance interconnect solutions, now part of Renesas Electronics.

The IDT70V658 family was designed for deterministic, low-latency shared memory in multi-processor and FPGA-based systems - emphasizing hardware arbitration, voltage flexibility, and industrial-grade reliability.

FAQ

What is the memory depth and width configuration of the 70V658S10BFG8?

The 70V658S10BFG8 is configured as 64K × 36 bits (2.25 Mbit total). Address lines A0–A15 are functional; A16L and A16R are No Connect per datasheet Note 1. This yields exactly 65,536 (2¹⁶) addressable locations, each storing 36 bits - ideal for 32-bit data plus parity or 4×9-bit byte-aligned transfers.

Does the 70V658S10BFG8 support both 2.5 V and 3.3 V I/O operation simultaneously?

Yes - the 70V658S10BFG8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIL and OPTR = VIH configures the left port for 2.5 V I/O (with VDDQL = 2.5 V) and the right port for 3.3 V I/O (with VDDQR = 3.3 V), enabling direct interfacing with mixed-voltage SoCs without external level shifters.

How does the BUSY flag function in MASTER versus SLAVE mode on the 70V658S10BFG8?

When M/S = VIH, the device operates as MASTER: BUSYL and BUSYR are totem-pole outputs that assert HIGH when the opposite port initiates a conflicting access to the same address. When M/S = VIL, it operates as SLAVE: BUSYL and BUSYR become inputs that must be driven HIGH by the MASTER to block writes - ensuring deterministic resolution of port contention.

What is the role of the semaphore feature in the 70V658S10BFG8, and how is it accessed?

The 70V658S10BFG8 includes an 8-bit hardware semaphore register accessible via I/O0–I/O7 when SEM = VIL and CE = VIH. Address bits A0–A2 select one of eight flags; reads return the flag value across all 36 I/Os, writes update I/O0 only. This enables atomic resource locking between ports without software intervention or memory read-modify-write cycles.

Is JTAG boundary-scan supported on the 70V658S10BFG8, and which pins are used?

Yes - the 70V658S10BFG8 fully complies with IEEE 1149.1 JTAG. Pins TCK (ball E10), TMS (ball T2), TDI (ball A1), TDO (ball B1), and TRST (ball R3) implement the test access port. This enables production boundary-scan testing, in-system programming verification, and debug visibility without requiring additional test fixtures.

70V658S10BFG8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 208-LFBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 2Mbit

Memory Organization:: 64K 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-CABGA (15x15)

70V658S10BFG8 FAQ

1.How can I place an order for 70V658S10BFG8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V658S10BFG8 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 70V658S10BFG8 reliable?

The price and inventory of 70V658S10BFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V658S10BFG8 is usually 5 days.

3.What payment methods are accepted for 70V658S10BFG8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V658S10BFG8 transactions.

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4.How is shipping managed for 70V658S10BFG8?

70V658S10BFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V658S10BFG8 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 70V658S10BFG8?

For technical support, including 70V658S10BFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V658S10BFG8 requirements.

6.How does Aetrix verify that 70V658S10BFG8 is sourced from the original manufacturer or authorized distributors?

All 70V658S10BFG8 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 70V658S10BFG8 meets industry standards.

7.What is the process for return or replacement of 70V658S10BFG8?

All 70V658S10BFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V658S10BFG8, 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 70V658S10BFG8 part is unused and in its original packaging.

Return procedure for 70V658S10BFG8:

1.Submit a request within 90 days.

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

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