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Renesas 70V658S10BC8
- Part No.:
- 70V658S10BC8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70V658S10BC8.pdf
- Description:
- IC SRAM 2MBIT PARALLEL 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,765
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Product details
Overview
70V658S10BC8 from IDT is a high-speed 64K × 36 asynchronous dual-port static RAM with true independent left/right ports, 10 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. It enables simultaneous read/write to the same memory location in real-time inter-processor communication systems.
For engineers reviewing the 70V658S10BC8 datasheet, 70V658S10BC8 pinout, 70V658S10BC8 application, or 70V658S10BC8 equivalent, this page delivers verified specifications, dual-port arbitration behavior, JTAG-compliant test interface support, and industrial-grade timing margins for embedded multiprocessing and telecom data buffering.
Technical Context
The 70V658S10BC8 implements fully asynchronous dual-port architecture with on-chip semaphore logic, automatic port arbitration, and MASTER/SLAVE configuration via M/S pin. Each port has independent CE0/CE1, R/W, OE, BE0–BE3, and address lines A0–A16 (A16 is NC for this variant).
It supports JTAG IEEE 1149.1 boundary-scan testing and provides non-tri-state BUSY/INT flags with totem-pole outputs. Power management includes dynamic current control: ISB3 full standby current ≤15 mA (CMOS inputs) and IDD dynamic current ≤500 mA at fMAX.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 36 bits (2.25 Mbit total); supports depth expansion using dual chip enables without external logic |
| Access Time (tAA) | 10 ns max (commercial temperature range); enables tight-timing inter-processor handshaking in real-time systems |
| Supply Voltages | VDD = 3.3 V ±150 mV (core); VDDQL/VDDQR = 3.3 V ±150 mV or 2.5 V ±100 mV (I/Os); independently configurable per port via OPTL/OPTR |
| Operating Temperature | 0°C to +70°C (commercial grade); validated for stable operation across full ambient range without derating |
| I/O Interface | LVTTL-compatible; 36 bidirectional data lines per port (I/O0L–I/O35L / I/O0R–I/O35R); byte-enable granularity (9-bit bytes) |
| Special Functions | On-chip semaphore signaling (8 flags, addressed by A0–A2), BUSY/INT flags, JTAG test interface (TCK/TMS/TDI/TDO/TRST) |
Pinout & Package
70V658S10BC8 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; VDDQ pins must match OPT pin state (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–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 path; byte-enabled via BE0L–BE3L (9-bit granularity) |
| I/O0R–I/O35R | Right Port Bidirectional Data | 36-bit data path; byte-enabled via BE0R–BE3R (9-bit granularity) |
| CE0L, CE1L, CE0R, CE1R | Chip Enable Inputs | Dual CE per port enables depth expansion; 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 Enable | Controls tri-state output drivers; required for read operations |
| BE0L–BE3L, BE0R–BE3R | Byte Enable Inputs | Selects 9-bit byte groups (I/O0–8, 9–17, 18–26, 27–35) for partial writes |
| SEML, SEMR | Semaphore Enable | Enables access to 8-bit semaphore register (addressed by A0–A2) on respective port |
| BUSYL, BUSYR | Busy Flag | Output when M/S = VIH (Master); input when M/S = VIL (Slave); totem-pole, non-tri-state |
| INTL, INTR | Interrupt Flag | Non-tri-state totem-pole output indicating semaphore or arbitration 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 | Set to VDD for 3.3 V I/O levels; set to VSS for 2.5 V I/O levels; independent per port |
| VDD, VDDQL, VDDQR | Power Supplies | VDD = 3.3 V core; VDDQL/VDDQR = I/O supply matching OPTL/OPTR setting |
| VSS | Ground | All VSS pins must be connected to system ground; multiple dedicated pins ensure low-noise return paths |
| TCK, TMS, TDI, TDO, TRST | JTAG Test Interface | Fully compliant with IEEE 1149.1; supports boundary-scan testing and debug visibility |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables concurrent read/write to identical addresses-critical for lock-free inter-processor communication without external arbitration logic |
| On-Chip Semaphore Logic | Hardware-managed 8-bit semaphore register (A0–A2) eliminates software overhead and race conditions in multi-core resource sharing |
| Independent I/O Voltage Control | OPTL/OPTR pins allow left/right ports to operate at 3.3 V or 2.5 V simultaneously-enabling seamless interfacing with mixed-voltage subsystems |
| Asynchronous Port Operation | No clock required; each port operates fully independently-ideal for heterogeneous processor pairs (e.g., DSP + ARM) with mismatched timing domains |
| Master/Slave Cascading Support | M/S pin enables depth expansion beyond 64K × 36; IDT70V659/58/57 family allows 72-bit+ word systems without external glue logic |
Applications
| Telecom Line Card Buffering | Real-Time Industrial PLC Communication |
|---|---|
|
Use Scenario: High-throughput packet buffering between line interface processor (LIP) and network switch fabric in carrier-grade DSLAMs. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency shared memory buffer; left port interfaces LIP (2.5 V I/O), right port connects to switch ASIC (3.3 V I/O). Use Value: Eliminates FIFO synchronization overhead and guarantees deterministic 10 ns read/write latency for sub-microsecond packet forwarding decisions. |
Use Scenario: Shared memory between motion controller CPU and safety monitor microcontroller in CNC machine tool controllers. IC Role / Device Role / Timing Role: Acts as fault-tolerant interlock memory; semaphore flags coordinate axis enable/disable sequences while BUSY signals prevent concurrent writes. Use Value: Hardware semaphore logic ensures atomic resource allocation without software polling-meeting SIL-3 functional safety timing constraints. |
| Avionics Display System Frame Buffer | Medical Imaging Data Pipeline |
|
Use Scenario: Frame buffer between graphics processor and display controller in ruggedized cockpit displays requiring EMI resilience and wide temperature operation. IC Role / Device Role / Timing Role: Provides pixel data storage with independent read (display scan-out) and write (GPU render) ports; operates at 3.3 V on both sides. Use Value: 10 ns access time sustains 120 Hz refresh at 1920×1080 resolution; PQFP package meets MIL-STD-883 thermal cycling requirements. |
Use Scenario: Real-time DICOM image reconstruction pipeline where FPGA-accelerated FFT engines write processed slices into shared memory for host CPU ingestion. IC Role / Device Role / Timing Role: Serves as high-bandwidth staging buffer; left port (FPGA) uses 2.5 V I/O, right port (x86 host) uses 3.3 V I/O; JTAG enables in-system verification. Use Value: Independent voltage domains eliminate level-shifter components; 36-bit width matches native FPGA data path, maximizing throughput per cycle. |
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, 10 ns access, 3.3 V only (no 2.5 V I/O option), no JTAG, different pinout (256-ball BGA) | Lacks independent I/O voltage selection and JTAG; requires PCB redesign and layout change | Choose when JTAG testability and mixed-voltage interfacing are not required and BGA assembly is available. |
| ISSI IS61WV6432ALL | 64K × 32 (not 36-bit), 10 ns access, 3.3 V only, no semaphore logic, no BUSY/INT flags | Reduced data width limits use in 36-bit legacy bus systems; no hardware arbitration features | Choose only for cost-sensitive designs where 32-bit width suffices and software-managed semaphores are acceptable. |
Compared with CY7C1362BV33 and IS61WV6432ALL, the 70V658S10BC8 uniquely delivers per-port I/O voltage flexibility, integrated semaphore/BUSY logic, and IEEE 1149.1 JTAG-making it the only drop-in solution for legacy 36-bit dual-ported systems requiring mixed-voltage interoperability and hardware-coordinated resource sharing.
Availability
70V658S10BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, avionics display systems, and medical imaging equipment requiring stable component supply across extended product lifecycles.
Supply support for 70V658S10BC8 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 semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The IDT70V659/58/57 family was designed specifically for high-reliability dual-processor communication in telecom, industrial control, and defense systems-emphasizing deterministic latency, hardware arbitration, and mixed-voltage compatibility.
FAQ
What is the memory organization and total capacity of the 70V658S10BC8?
The 70V658S10BC8 is organized as 64K × 36 bits, delivering 2.25 Mbit of true dual-port SRAM. This configuration supports 65,536 address locations with 36 data bits per location, enabling direct interfacing with 36-bit legacy buses and facilitating depth expansion using dual chip enables without external logic.
Does the 70V658S10BC8 support mixed-voltage operation between its two ports?
Yes, the 70V658S10BC8 supports independent I/O voltage selection per port: OPTL sets left-port I/O voltage (3.3 V or 2.5 V), and OPTR sets right-port I/O voltage. VDDQL and VDDQR must be supplied accordingly. This allows one port to interface with a 2.5 V FPGA while the other connects to a 3.3 V microcontroller-eliminating external level shifters.
What is the function of the M/S pin on the 70V658S10BC8, and how does it affect BUSY behavior?
The M/S pin configures the 70V658S10BC8 as either Master (M/S = VIH) or Slave (M/S = VIL). When configured as Master, BUSYL and BUSYR are totem-pole outputs indicating port contention; as Slave, they become inputs used to stall writes during arbitration. This enables hierarchical cascading in multi-device memory systems without external logic.
How does the semaphore functionality work in the 70V658S10BC8, and what address lines control it?
The 70V658S10BC8 includes an 8-bit hardware semaphore register accessed via A0–A2. To read or write semaphore flags, SEMX must be asserted (VIL) while CEX is deasserted (VIH). The eight flags are broadcast across all 36 I/O lines during reads, enabling atomic resource locking across both ports without software intervention or polling loops.
Is JTAG boundary-scan supported on the 70V658S10BC8, and which pins are used?
Yes, the 70V658S10BC8 fully supports IEEE 1149.1 JTAG boundary-scan. Pins TCK (Test Clock), TMS (Test Mode Select), TDI (Test Data In), TDO (Test Data Out), and TRST (Test Reset) are dedicated to this function. These pins enable in-system testability, interconnect verification, and debug visibility without requiring additional test fixtures.
70V658S10BC8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- 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:
- 256-CABGA (17x17)
70V658S10BC8 FAQ
1.How can I place an order for 70V658S10BC8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V658S10BC8 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 70V658S10BC8 reliable?
The price and inventory of 70V658S10BC8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V658S10BC8 is usually 5 days.
3.What payment methods are accepted for 70V658S10BC8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V658S10BC8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V658S10BC8?
70V658S10BC8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V658S10BC8 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 70V658S10BC8?
For technical support, including 70V658S10BC8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V658S10BC8 requirements.
6.How does Aetrix verify that 70V658S10BC8 is sourced from the original manufacturer or authorized distributors?
All 70V658S10BC8 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 70V658S10BC8 meets industry standards.
7.What is the process for return or replacement of 70V658S10BC8?
All 70V658S10BC8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V658S10BC8, 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 70V658S10BC8 part is unused and in its original packaging.
Return procedure for 70V658S10BC8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V658S10BC8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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