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Renesas 70V658S12BF8
- Part No.:
- 70V658S12BF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-LFBGA
- Datasheet:
-
70V658S12BF8.pdf
- Description:
- IC SRAM 2MBIT PARALLEL 208CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
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Product details
Overview
70V658S12BF8 from IDT is a high-speed 64K × 36 asynchronous dual-port static RAM with true independent left/right ports, 12 ns maximum access time (commercial/industrial), 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 real-time control systems requiring deterministic arbitration.
For engineers reviewing the 70V658S12BF8 datasheet, 70V658S12BF8 pinout, 70V658S12BF8 application, or 70V658S12BF8 equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-port arbitration behavior, industrial temperature support (–40°C to +85°C), and precise JTAG-compliant test interface details - all specific to the 70V658S12BF8 208-ball BGA variant.
Technical Context
The 70V658S12BF8 implements fully asynchronous dual-port operation with separate address, control, and bidirectional I/O buses for left (L) and right (R) ports. Each port features independent chip enables (CE0/CE1), byte enables (BE0–BE3), read/write (R/W), output enable (OE), and semaphore/interrupt/busy signaling.
On-chip arbitration logic supports master/slave configuration via M/S pin, with BUSY flag generation on master (M/S = VIH) and BUSY input on slave (M/S = VIL). Semaphore flags are accessed via dedicated A0–A2 addressing and controlled by SEM pin, enabling inter-processor synchronization without external logic.
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) | 12 ns max - guarantees deterministic latency for real-time data exchange between independent processors |
| Core Supply (VDD) | 3.3 V ± 150 mV - fixed core voltage; decoupling required on all VDD pins |
| I/O Voltage Support | Selectable 3.3 V or 2.5 V per port via OPTL/OPTR - enables mixed-voltage system interfacing |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded applications without derating |
| JTAG Compliance | IEEE 1149.1 - supports boundary-scan testing and in-system debug of connected logic |
| Package | 208-ball fine-pitch BGA (BF208), 15 mm × 15 mm × 1.4 mm, 0.8 mm ball pitch |
Pinout & Package
70V658S12BF8 is housed in a 208-ball fine-pitch BGA (package code BF208), with 15 mm × 15 mm body, 0.8 mm ball pitch, and standard ball layout per IDT drawing 4869 drw 02b. Power and ground balls are distributed across the array for low-inductance supply delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L | Left port address inputs | A16L is NC per datasheet note - 16-bit addressing yields 64K depth for left port |
| A0R–A15R | Right port address inputs | A16R is NC - identical 64K addressing capability on right port |
| I/O0L–I/O35L | Left port bidirectional data bus | 36-bit wide; BE0L–BE3L enable 9-bit byte writes independently |
| I/O0R–I/O35R | Right port bidirectional data bus | 36-bit wide; BE0R–BE3R provide per-byte write control on right port |
| CE0L, CE1L, CE0R, CE1R | Chip enable pairs per port | Dual CE per port allows depth expansion without external logic; CE0=VIL & CE1=VIH enables port |
| R/WL, R/WR | Read/write direction control | Active-low write assertion; supports asynchronous read/write overlap when ports access different locations |
| OEL, OER | Output enable per port | Controls tri-state of I/O drivers; OE=VIL enables outputs during read cycles |
| BE0L–BE3L, BE0R–BE3R | Byte enable inputs | Each controls one 9-bit byte (I/O0–8, 9–17, 18–26, 27–35); enables partial-word writes |
| SEML, SEMR | Semaphore enable inputs | Enable access to 8 semaphore flags via I/O0–I/O35 using A0–A2; critical for inter-processor sync |
| BUSYL, BUSYR | Busy flag signals | BUSY is output on master (M/S=VIH), input on slave (M/S=VIL); asserts during port contention |
| INTL, INTR | Interrupt flags | Open-drain totem-pole outputs; indicate semaphore or arbitration events to host processors |
| M/S | Master/slave select | Configures device role: VIH = master (BUSY output), VIL = slave (BUSY input) |
| OPTL, OPTR | I/O voltage select | VIL selects 2.5 V I/O; VIH selects 3.3 V I/O - sets VDDQL/VDDQR supply requirements |
| VDD, VDDQL, VDDQR | Power supplies | VDD = 3.3 V core; VDDQL/VDDQR must match OPTL/OPTR setting (3.3 V or 2.5 V) |
| VSS | Ground | All VSS balls must be connected to system ground plane; 42 dedicated ground balls in BF208 package |
| TCK, TMS, TDI, TDO, TRST | JTAG test interface | Fully compliant IEEE 1149.1; supports boundary-scan and internal logic test at up to 10 MHz |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables concurrent, asynchronous read/write to identical memory addresses - eliminates software locks in multi-CPU systems |
| Hardware semaphore logic | Eight dedicated flags accessible via A0–A2 and SEM pin - provides atomic resource locking without CPU intervention |
| Independent per-port I/O voltage | OPTL/OPTR pins allow left port at 3.3 V and right port at 2.5 V - bridges legacy and low-voltage subsystems |
| Master/slave arbitration mode | M/S pin configures BUSY as output (master) or input (slave) - enables scalable multi-device memory expansion |
| Low-power standby modes | ISB3 = 3–6 mA (full CMOS standby); ISB1 = 75–115 mA (TTL-level standby) - reduces idle power in always-on systems |
| JTAG boundary-scan support | Full IEEE 1149.1 compliance with TAP controller - enables PCB-level interconnect test and debug visibility |
Applications
| Industrial Motion Control | Telecom Line Card Buffering |
|---|---|
Use Scenario: Two DSPs coordinate motor trajectory planning and real-time servo loop execution, sharing position/velocity data with microsecond determinism. IC Role / Device Role / Timing Role: 70V658S12BF8 serves as shared memory buffer with hardware semaphore arbitration - ensures atomic updates to motion profiles without race conditions. Use Value: Eliminates software mutex overhead; 12 ns access time and BUSY flag coordination guarantee sub-100 ns worst-case inter-processor handoff latency. |
Use Scenario: High-density telecom line card buffers packet headers and control metadata between network processor and traffic manager ASICs. IC Role / Device Role / Timing Role: 70V658S12BF8 operates as dual-port FIFO with independent 36-bit buses - absorbs bursty ingress/egress traffic without stalling either side. Use Value: Per-port 2.5 V/3.3 V I/O support matches mixed-voltage ASIC interfaces; 64K × 36 capacity accommodates 2K-packet header tables with room for metadata expansion. |
| Avionics Data Concentrator | Medical Imaging Pipeline Buffer |
Use Scenario: ARINC 429 data concentrator aggregates sensor inputs from multiple avionics bays into a central flight management unit. IC Role / Device Role / Timing Role: 70V658S12BF8 acts as time-stamped message queue - left port accepts framed sensor data, right port feeds FMS with prioritized packets. Use Value: Industrial temperature rating (–40°C to +85°C) meets DO-160E Section 22 Category D; BUSY flag prevents overwrites during FMS read cycles. |
Use Scenario: MRI scanner pipeline buffers raw k-space data between ADC array and FPGA-based reconstruction engine operating at different clock domains. IC Role / Device Role / Timing Role: 70V658S12BF8 provides asynchronous bridge - left port captures 36-bit parallel samples at 100+ MSPS, right port streams to reconstruction logic. Use Value: 12 ns tAA enables sustained >80 MB/s throughput per port; JTAG support simplifies in-field validation of data integrity paths. |
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 | 64K × 36, 12 ns, 3.3 V only (no 2.5 V I/O option), 256-ball BGA (larger footprint) | Lacks per-port I/O voltage selection; requires board redesign if 2.5 V interface needed | Choose when system uses uniform 3.3 V I/O and board space permits larger BGA |
| IDT70V659S12BF8 | 128K × 36 (double density), same 12 ns speed, identical pinout and feature set | Provides higher memory depth for applications needing >64K × 36 - no change to timing or interface logic | Choose when additional memory capacity is required without altering PCB layout or firmware |
Compared with CY7C1362BV33-12BGXI, the 70V658S12BF8 offers flexible I/O voltage per port and smaller 208-ball BGA; compared with IDT70V659S12BF8, it delivers identical performance in a cost-optimized 64K configuration - ideal for capacity-constrained designs where 128K is unnecessary.
Availability
70V658S12BF8 is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, avionics data concentration, and medical imaging pipeline applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 70V658S12BF8 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 IDT70V658S family was designed for deterministic, low-latency inter-processor communication in industrial, aerospace, and telecom infrastructure - emphasizing hardware arbitration, mixed-voltage interoperability, and JTAG-debuggable reliability.
FAQ
What is the memory depth and width of the 70V658S12BF8?
The 70V658S12BF8 provides 64K × 36 organization (2.25 Mbit total). Address lines A0–A15 are functional; A16L and A16R are no-connect (NC) pins per datasheet note 1. This yields exactly 65,536 words of 36-bit data, with no internal banking or interleaving.
Does the 70V658S12BF8 support both 3.3 V and 2.5 V I/O interfaces simultaneously?
Yes - the 70V658S12BF8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH and OPTR = VIL configures the left port for 3.3 V I/O (requiring VDDQL = 3.3 V) and the right port for 2.5 V I/O (requiring VDDQR = 2.5 V), enabling direct interfacing with mixed-voltage ASICs.
How does the BUSY signal function in master vs. slave configuration on the 70V658S12BF8?
When M/S = VIH, the 70V658S12BF8 operates as master: BUSYL and BUSYR are active-high totem-pole outputs that assert during port contention. When M/S = VIL, it operates as slave: BUSYL and BUSYR become inputs used to stall writes on the local port when the master asserts BUSY - no external pull-ups required.
What is the purpose of the SEM pin on the 70V658S12BF8, and how are semaphore flags accessed?
The SEM pin enables access to eight hardware semaphore flags stored in dedicated registers. With CE = VIH and SEM = VIL, writing to I/O0 places data into the selected flag (addressed by A0–A2); reading any I/O pin returns the full 8-bit flag value. This provides lock-free inter-processor synchronization without software overhead.
Is the 70V658S12BF8 compatible with JTAG boundary-scan testing?
Yes - the 70V658S12BF8 fully complies with IEEE 1149.1. Its TDI, TDO, TCK, TMS, and TRST pins implement a standard 4-wire JTAG interface supporting instruction register scan, data register scan, and boundary-scan testing at up to 10 MHz, verified in production test.
70V658S12BF8 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:
- 12ns
- Access Time:
- 12 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)
70V658S12BF8 FAQ
1.How can I place an order for 70V658S12BF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V658S12BF8 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 70V658S12BF8 reliable?
The price and inventory of 70V658S12BF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V658S12BF8 is usually 5 days.
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70V658S12BF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V658S12BF8 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 70V658S12BF8?
For technical support, including 70V658S12BF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V658S12BF8 requirements.
6.How does Aetrix verify that 70V658S12BF8 is sourced from the original manufacturer or authorized distributors?
All 70V658S12BF8 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 70V658S12BF8 meets industry standards.
7.What is the process for return or replacement of 70V658S12BF8?
All 70V658S12BF8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V658S12BF8, 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 70V658S12BF8 part is unused and in its original packaging.
Return procedure for 70V658S12BF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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