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

Renesas 70V659S12BFI

Name: 70V659S12BFI
Brand: Renesas
SKU: 70V659S12BFI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V659S12BFI

Manufacturer:: Renesas

Category:: Memory

Package:: 208-LFBGA

Datasheet:: 70V659S12BFI.pdf

Description:: IC SRAM 4.5MBIT PAR 208CABGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

70V659S12BFI from IDT is a high-speed 128K × 36 asynchronous dual-port static RAM with true independent left/right ports, 12 ns max access time (commercial grade), LVTTL-compatible 3.3 V core supply, and selectable 3.3 V/2.5 V I/O voltage per port via OPT pins. It enables simultaneous read/write to the same memory location in telecom switching fabric and real-time DSP co-processing systems.

For engineers reviewing the 70V659S12BFI datasheet, 70V659S12BFI pinout, 70V659S12BFI application, or 70V659S12BFI equivalent, this page delivers verified electrical specs, dual-port arbitration behavior, JTAG-compliant test interface support, and industrial-grade thermal performance across 208-pin PQFP, 208-ball BGA, and 256-ball BGA packages.

Technical Context

This device implements fully asynchronous dual-port operation with on-chip semaphore logic, master/slave arbitration, and independent byte-enable controls (BE0–BE3 per port) for 9-bit-wide data segments. Each port supports separate chip enables (CE0/CE1), read/write (R/W), output enable (OE), and busy/interrupt flags.

The architecture includes dedicated address decoders per port, automatic power-down when both CE lines are inactive, and IEEE 1149.1-compliant JTAG boundary-scan support (TMS/TCK/TDI/TDO/TRST). BUSY signaling operates as output in Master mode (M/S = VIH) and input in Slave mode (M/S = VIL), with non-tri-state totem-pole drive.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	128K × 36 bits (4.608 Mbit); supports depth expansion using dual CE and cascading with IDT70V658/657
Access Time (tAA)	12 ns max (commercial temperature range); guarantees deterministic latency for real-time packet buffering
Supply Voltages	VDD = 3.3 V ± 150 mV (core); VDDQ = 3.3 V ± 150 mV or 2.5 V ± 100 mV per port, selected independently by OPTL/OPTR
I/O Interface	LVTTL-compatible; supports mixed-voltage system integration (e.g., 3.3 V control + 2.5 V data bus)
Operating Temperature	–40°C to +85°C (industrial grade); validated for embedded telecom and industrial control environments
JTAG Support	Fully compliant with IEEE 1149.1; includes TMS, TCK, TDI, TDO, TRST for production test and debug
Power Consumption	ISB3 = 6 mA max (full standby, CMOS inputs); IDD = 490 mA max (both ports active, 12 ns version)

Pinout & Package

70V659S12BFI is packaged in a 208-pin Plastic Quad Flatpack (PQFP), body size ≈ 28 mm × 28 mm × 3.5 mm. All VDD pins require connection to 3.3 V; VDDQL/VDDQR must match OPTL/OPTR settings (3.3 V if OPT = VDD, 2.5 V if OPT = VSS); all VSS pins connect to ground.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A16L / A0R–A16R	Address Inputs (Left/Right)	17-bit address per port; A16L/A16R are no-connect for IDT70V658/657 variants but functional for 70V659
I/O0L–I/O35L / I/O0R–I/O35R	Bidirectional Data Bus (36-bit per port)	Independent 36-bit I/O paths; byte-enabled via BE0–BE3 (9-bit granularity) for multiplexed bus compatibility
CE0L/CE1L, CE0R/CE1R	Chip Enable Inputs	Dual CE per port enables depth expansion without external logic; CE0=VIL & CE1=VIH required for active access
R/WL/R/WR, OEL/OER	Read/Write & Output Enable	Asynchronous control: R/W determines direction; OE gates output drivers; both required for valid read cycles
BE0L–BE3L, BE0R–BE3R	Byte Enable Inputs	Selects 9-bit subwords (I/O0–8, 9–17, 18–26, 27–35) for partial writes-critical for protocol-aligned packet updates
SEML/SEMR, INTL/INTR, BUSYL/BUSYR	Semaphore, Interrupt, Busy Flags	Hardware semaphore arbitration between ports; BUSY is totem-pole (non-tri-state); INT/SEM indicate flag status changes
M/S	Master/Slave Select	M/S = VIH → BUSY output (Master); M/S = VIL → BUSY input (Slave); enables multi-device synchronization without glue logic
OPTL/OPTR, VDDQL/VDDQR	I/O Voltage Selection	OPT = VDD → 3.3 V I/O; OPT = VSS → 2.5 V I/O; VDDQ must match OPT setting-enables mixed-voltage board design
TMS/TCK/TDI/TDO/TRST	JTAG Test Interface	Fully IEEE 1149.1-compliant; supports boundary-scan testing and in-system programming verification

Key Features

Feature	Design Value
True Dual-Port Memory Cells	Enables concurrent read/write to identical addresses-eliminates arbitration wait states in real-time inter-processor communication
On-Chip Semaphore Logic	Eight hardware semaphore flags (addressed by A0–A2) shared across both ports; resolves contention without software overhead
Independent Per-Port I/O Voltage	OPTL/OPTR allow left port at 3.3 V and right port at 2.5 V-supports legacy + modern interface mixing on single PCB
Automatic Power-Down	Both CE lines inactive → ISB3 ≤ 6 mA (CMOS inputs); reduces idle power in burst-mode telecom applications
Master/Slave Cascading	Single M/S pin configures device as Master (BUSY output) or Slave (BUSY input); enables error-free 72+ bit wide memory expansion
JTAG Boundary-Scan Support	IEEE 1149.1 compliance enables automated PCB test coverage and signal integrity validation during manufacturing

Applications

Telecom Switching Fabric	DSP Co-Processing Buffer
Use Scenario: High-throughput packet switching where ingress and egress processors access shared header tables simultaneously. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared memory buffer; left port serves ingress ASIC, right port serves egress ASIC. Use Value: 12 ns tAA and true concurrent access eliminate pipeline stalls, enabling line-rate 10G Ethernet forwarding.	Use Scenario: Real-time audio/video processing where DSP and host processor exchange frame buffers without CPU intervention. IC Role / Device Role / Timing Role: Memory bridge with independent timing domains; DSP writes processed frames to right port while host reads via left port. Use Value: Hardware semaphore flags coordinate buffer ownership, preventing race conditions without polling or interrupts.
Industrial Motion Controller	Avionics Data Acquisition
Use Scenario: Closed-loop servo control requiring deterministic write of position commands and read of encoder feedback within one cycle. IC Role / Device Role / Timing Role: Deterministic dual-port RAM synchronizes FPGA-based motion sequencer (left port) and ARM-based safety monitor (right port). Use Value: BUSY flag assertion on address collision ensures safe fallback to last-known-good state-meets IEC 61508 SIL-3 timing constraints.	Use Scenario: Multi-sensor fusion in flight control units where ADCs stream data to one port while flight computer reads processed telemetry from the other. IC Role / Device Role / Timing Role: Radiation-tolerant memory interface; left port accepts 2.5 V LVDS-converted sensor streams, right port supplies 3.3 V to ARM Cortex-M7. Use Value: Independent VDDQ selection per port allows direct interfacing to mixed-voltage sensor subsystems without level shifters.

Telecom Switching Fabric

DSP Co-Processing Buffer

Use Scenario: High-throughput packet switching where ingress and egress processors access shared header tables simultaneously.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared memory buffer; left port serves ingress ASIC, right port serves egress ASIC.

Use Value: 12 ns tAA and true concurrent access eliminate pipeline stalls, enabling line-rate 10G Ethernet forwarding.

Use Scenario: Real-time audio/video processing where DSP and host processor exchange frame buffers without CPU intervention.

IC Role / Device Role / Timing Role: Memory bridge with independent timing domains; DSP writes processed frames to right port while host reads via left port.

Use Value: Hardware semaphore flags coordinate buffer ownership, preventing race conditions without polling or interrupts.

Industrial Motion Controller

Avionics Data Acquisition

Use Scenario: Closed-loop servo control requiring deterministic write of position commands and read of encoder feedback within one cycle.

IC Role / Device Role / Timing Role: Deterministic dual-port RAM synchronizes FPGA-based motion sequencer (left port) and ARM-based safety monitor (right port).

Use Value: BUSY flag assertion on address collision ensures safe fallback to last-known-good state-meets IEC 61508 SIL-3 timing constraints.

Use Scenario: Multi-sensor fusion in flight control units where ADCs stream data to one port while flight computer reads processed telemetry from the other.

IC Role / Device Role / Timing Role: Radiation-tolerant memory interface; left port accepts 2.5 V LVDS-converted sensor streams, right port supplies 3.3 V to ARM Cortex-M7.

Use Value: Independent VDDQ selection per port allows direct interfacing to mixed-voltage sensor subsystems without level shifters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-12BGXI	128K × 36, 12 ns, 3.3 V only (no 2.5 V I/O option); no JTAG; different pinout (256-ball BGA only)	Lacks per-port voltage flexibility and IEEE 1149.1 test support; requires PCB redesign for migration	Choose when JTAG and mixed-voltage I/O are unnecessary and BGA-only footprint is acceptable.
IDT70V658S12BFI	64K × 36 (half density); A16 address line is NC; otherwise identical timing, voltage, and feature set	Used where memory depth is constrained by cost or layout; shares same package and pinout as 70V659S12BFI	Direct drop-in replacement if 64K × 36 capacity suffices; no layout change required.

Compared with CY7C1362BV33-12BGXI and IDT70V658S12BFI, the 70V659S12BFI uniquely delivers per-port I/O voltage selection, integrated JTAG, and full 128K × 36 density in pin-compatible 208-pin PQFP-enabling upgrade paths without board re-spin.

Availability

70V659S12BFI is available at Aetrix Electronics and suitable for telecom switching fabric, industrial motion controllers, and avionics data acquisition systems requiring stable component supply across extended product lifecycles.

Supply support for 70V659S12BFI 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 for communications, computing, and industrial markets.

The IDT70V659 family targets high-reliability dual-port memory applications demanding deterministic latency, hardware arbitration, and mixed-voltage interoperability in telecom infrastructure and real-time control systems.

FAQ

What is the maximum operating temperature range supported by the 70V659S12BFI?

The 70V659S12BFI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time (tAA ≤ 12 ns), standby current (ISB3 ≤ 6 mA), and BUSY timing (tBDD ≤ 12 ns), making it suitable for under-hood automotive modules and factory-floor PLCs.

Does the 70V659S12BFI support JTAG boundary-scan testing?

Yes, the 70V659S12BFI includes full IEEE 1149.1-compliant JTAG support with dedicated TMS, TCK, TDI, TDO, and TRST pins. This enables production-level boundary-scan testing of solder joints and interconnects without requiring functional test vectors-critical for high-reliability aerospace and medical PCBs.

How does the M/S pin affect BUSY signal behavior in the 70V659S12BFI?

In the 70V659S12BFI, the M/S pin configures BUSY as an output when M/S = VIH (Master mode), asserting it during port-to-port address contention. When M/S = VIL (Slave mode), BUSY becomes an input used to stall writes until the Master releases the resource-enabling hierarchical arbitration in multi-device memory arrays.

Can the left and right ports of the 70V659S12BFI operate at different I/O voltages?

Yes. The 70V659S12BFI supports independent I/O voltage selection per port: OPTL sets left-port VDDQL (3.3 V or 2.5 V), and OPTR sets right-port VDDQR (3.3 V or 2.5 V). Both ports may run at the same voltage or differ-enabling direct interface to heterogeneous logic families without external level shifters.

What is the function of the BE0–BE3 pins on each port of the 70V659S12BFI?

The BE0–BE3 pins on each port of the 70V659S12BFI enable 9-bit byte-select functionality: BE0 controls I/O0–8, BE1 controls I/O9–17, BE2 controls I/O18–26, and BE3 controls I/O27–35. This allows partial-word writes (e.g., updating only timestamp bytes in a packet header) without read-modify-write cycles-reducing bus traffic and latency.

70V659S12BFI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 208-LFBGA

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 4.5Mbit

Memory Organization:: 128K x 36

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 12ns

Access Time:: 12 ns

Voltage - Supply:: 3.15V ~ 3.45V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 208-CABGA (15x15)

70V659S12BFI FAQ

1.How can I place an order for 70V659S12BFI through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V659S12BFI 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 70V659S12BFI reliable?

The price and inventory of 70V659S12BFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V659S12BFI is usually 5 days.

3.What payment methods are accepted for 70V659S12BFI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V659S12BFI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V659S12BFI?

70V659S12BFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V659S12BFI 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 70V659S12BFI?

For technical support, including 70V659S12BFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V659S12BFI requirements.

6.How does Aetrix verify that 70V659S12BFI is sourced from the original manufacturer or authorized distributors?

All 70V659S12BFI 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 70V659S12BFI meets industry standards.

7.What is the process for return or replacement of 70V659S12BFI?

All 70V659S12BFI units undergo pre-shipment inspection (PSI). If there is an issue with 70V659S12BFI, 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 70V659S12BFI part is unused and in its original packaging.

Return procedure for 70V659S12BFI:

1.Submit a request within 90 days.

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

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