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Renesas 70V658S15BC
- Part No.:
- 70V658S15BC
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70V658S15BC.pdf
- Description:
- IC SRAM 2MBIT PARALLEL 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,729
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Product details
Overview
70V658S15BC from IDT is a high-speed 64K × 36 asynchronous dual-port static RAM with true independent left/right ports, 15 ns maximum access time, 3.3 V core supply, and selectable 3.3 V/2.5 V I/O voltage per port. It supports simultaneous read/write to the same memory location and is used in real-time inter-processor communication, FPGA co-processor buffering, and telecom packet switching systems.
For engineers reviewing the 70V658S15BC datasheet, 70V658S15BC pinout, 70V658S15BC application, or 70V658S15BC equivalent, this page delivers verified electrical specs, port arbitration behavior, JTAG-compliant test interface support, byte-enable granularity, and industrial-grade thermal performance - all confirmed for the exact 70V658S15BC variant in 208-pin PQFP packaging.
Technical Context
The 70V658S15BC implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses for left (L) and right (R) ports. Each port features independent chip enables (CE0/CE1), read/write (R/W), output enable (OE), and four 9-bit byte enables (BE0–BE3), enabling precise 8-bit-aligned data masking.
On-chip arbitration logic handles port contention via BUSY flag signaling and semaphore registers accessible at A0–A2. The device supports IEEE 1149.1 JTAG boundary-scan testing and allows mixed-voltage operation: VDD = 3.3 V ±150 mV for core logic, while VDDQL/VDDQR are independently configurable to 3.3 V or 2.5 V via OPTL/OPTR pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 36 bits (2.25 Mbit total); A0–A15 active; A16 is NC - enables compact 16-bit address bus routing |
| Access Time (tAA) | 15 ns max (commercial & industrial grades); guarantees deterministic latency for real-time buffer handoff |
| Supply Voltages | VDD = 3.15–3.45 V (core); VDDQL/VDDQR = 3.15–3.45 V or 2.4–2.6 V (I/O); supports mixed-voltage system interfacing |
| I/O Interface | LVTTL-compatible; VIH = 2.0 V min (3.3 V mode), 1.7 V min (2.5 V mode); ensures robust noise margin with legacy or low-voltage peripherals |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for deployment in base station RF modules and motor drive controllers |
| Power Consumption | ISB3 = 6 mA max (full standby, CMOS inputs); enables ultra-low-power sleep modes during inter-processor idle periods |
| JTAG Support | IEEE 1149.1 compliant (TCK ≤ 10 MHz); provides production-testable boundary-scan capability without external debug hardware |
Pinout & Package
70V658S15BC is packaged in a 208-pin Plastic Quad Flatpack (PQFP), body size ≈ 28 mm × 28 mm × 3.5 mm, with standard LVTTL-compatible lead pitch and thermal pad compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L / A0R–A15R | Address Inputs (Left/Right) | 16-bit address bus per port; A16 is No Connect - simplifies PCB layout by eliminating unused trace routing |
| I/O0L–I/O35L / I/O0R–I/O35R | Bidirectional Data I/O (36-bit wide) | Two independent 36-bit data paths; supports concurrent 72-bit-wide memory expansion when cascaded with master/slave configuration |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Inputs | Dual CE per port enables depth expansion without external logic; CE0=VIL & CE1=VIH selects active chip enable state |
| R/WL/R/WR, OEL/OER | Read/Write & Output Enable Controls | Asynchronous control allows independent read/write initiation on each port - no clock synchronization required |
| BE0L–BE3L, BE0R–BE3R | Byte Enable Inputs (9-bit groups) | Enables granular 9-bit write masking - critical for protocol header updates without disturbing adjacent payload bytes |
| BUSYL/BUSYR, SEML/SEMR | Arbitration Flags (Busy/Semaphore) | BUSY signals block conflicting writes; SEM enables eight shared semaphore flags accessed via A0–A2 - essential for lock-free IPC |
| OPTL/OPTR, VDDQL/VDDQR | I/O Voltage Selection | OPT = VDD → 3.3 V I/O; OPT = VSS → 2.5 V I/O; decouples I/O voltage from core - supports heterogeneous bus interfacing |
| TMS/TCK/TDO/TDI/TRST | JTAG Test Interface | Fully compliant IEEE 1149.1 boundary-scan; enables automated PCB test and in-system verification of interconnect integrity |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous read and write to identical addresses - eliminates software polling or handshake delays in producer-consumer architectures |
| 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 3.3 V processors with modern 2.5 V FPGAs or ASICs |
| Hardware Semaphore Logic | Eight dedicated semaphore flags accessible via A0–A2; eliminates need for external mutex ICs or software spinlocks in multi-core systems |
| Master/Slave Cascading | M/S pin configures BUSY as output (master) or input (slave); enables seamless 72-bit+ word expansion using multiple 70V658S15BC devices |
| Low-Power Standby Modes | ISB3 = 6 mA max (CMOS-level full standby); reduces power in idle states without sacrificing wake-up latency or data retention |
| Asynchronous Arbitration | BUSY assertion occurs within 15 ns of address/CE match - ensures deterministic response for hard real-time interrupt servicing |
Applications
| Telecom Packet Buffering | FPGA-CPU Co-Processing Interface |
|---|---|
|
Use Scenario: High-throughput line cards buffering variable-length Ethernet frames between PHY and switch fabric. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency, non-blocking FIFO - left port accepts ingress packets, right port feeds egress scheduler. Use Value: 15 ns tAA and independent BE controls allow per-packet header modification without stalling payload transfer - sustaining 10 Gbps line rate. |
Use Scenario: Real-time image preprocessing pipeline where FPGA performs pixel filtering and CPU handles metadata tagging. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphores coordinates frame ownership between FPGA (writer) and CPU (reader). Use Value: On-chip semaphore logic eliminates software overhead; BUSY-driven arbitration prevents race conditions during concurrent frame access. |
| Industrial Motion Controller | Avionics Data Concentrator |
|
Use Scenario: Multi-axis servo controller synchronizing position commands from host PC and feedback from encoders. IC Role / Device Role / Timing Role: Left port interfaces with host RS-422/USB bridge; right port connects to DSP for real-time PID loop execution. Use Value: Industrial temperature range (–40°C to +85°C) and 6 mA ISB3 ensure reliable operation in uncooled cabinet environments. |
Use Scenario: ARINC 429/664 data concentrator aggregating sensor telemetry across redundant flight control channels. IC Role / Device Role / Timing Role: Dual-port SRAM buffers time-stamped sensor samples; JTAG support enables DO-254-compliant production test traceability. Use Value: IEEE 1149.1 compliance satisfies avionics test requirements; 208-pin PQFP meets board-level reliability standards for vibration-prone installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-15ZXI | 64K × 36, 15 ns, 3.3 V only (no 2.5 V I/O option); no JTAG; 256-ball BGA only | Lacks per-port voltage selection and boundary-scan - unsuitable for mixed-voltage or safety-critical test environments | Choose if BGA footprint and absence of JTAG are acceptable, and system uses uniform 3.3 V I/O |
| IDT70V659S15BC | 128K × 36 (double density); otherwise identical timing, pinout, and feature set | Provides larger buffer capacity for longer burst transfers but requires additional address decoding logic | Choose when >64K × 36 memory depth is required and PCB layout accommodates same 208-pin PQFP footprint |
Compared with CY7C1362BV33-15ZXI, the 70V658S15BC offers flexible I/O voltage selection and JTAG testability; compared with IDT70V659S15BC, it delivers identical performance at half the memory density - reducing cost and power in bandwidth-constrained designs.
Availability
70V658S15BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data concentrators requiring stable component supply across extended product lifecycles.
Supply support for 70V658S15BC 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 high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The IDT70V658 family targets deterministic, low-latency inter-processor communication - designed specifically for systems demanding simultaneous, conflict-free access to shared memory without software arbitration overhead.
FAQ
What is the maximum operating frequency supported by the 70V658S15BC?
The 70V658S15BC does not operate on a clock signal - it is an asynchronous dual-port SRAM. Its performance is defined by access time: 15 ns maximum tAA and tRC. This translates to effective throughput up to ~66.7 MHz random access rate, but actual system speed depends on external controller timing margins and bus loading.
Does the 70V658S15BC support both 3.3 V and 2.5 V I/O on the same device?
Yes. The 70V658S15BC supports independent I/O voltage selection per port: OPTL sets left-port VDDQL to 3.3 V or 2.5 V; OPTR sets right-port VDDQR identically. This allows one port to interface with a 3.3 V microcontroller while the other connects to a 2.5 V FPGA - confirmed in datasheet section "Pin Names" and "Recommended DC Operating Conditions".
Is A16 used as an address pin on the 70V658S15BC?
No. A16 is a No Connect (NC) pin for the 70V658S15BC, as explicitly stated in Note 1 of the Pin Configuration diagrams and the "Pin Names" table. Only A0–A15 are functional address inputs - consistent with its 64K × 36 organization (216 = 65,536 words).
How does the BUSY arbitration mechanism work on the 70V658S15BC?
When configured as Master (M/S = VIH), BUSYL/BUSYR assert within 15 ns of address/CE match to block conflicting writes on the opposite port. As Slave (M/S = VIL), BUSY is an input that must be asserted externally before initiating a write. This hardware-enforced flow control prevents data corruption during simultaneous access - detailed in Truth Table I and AC parameter tBAA/tBDA.
Can the 70V658S15BC be used in industrial temperature environments?
Yes. The 70V658S15BC is qualified for industrial temperature range (–40°C to +85°C), as specified in "Maximum Operating Temperature and Supply Voltage" table and confirmed across DC/AC electrical characteristics tables for the S12 and S15 speed grades. This makes it suitable for deployment in motor drives, base stations, and factory automation equipment.
70V658S15BC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- Packaging:
- Tray
- 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:
- 15ns
- Access Time:
- 15 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)
70V658S15BC FAQ
1.How can I place an order for 70V658S15BC through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V658S15BC 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 70V658S15BC reliable?
The price and inventory of 70V658S15BC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V658S15BC is usually 5 days.
3.What payment methods are accepted for 70V658S15BC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V658S15BC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V658S15BC?
70V658S15BC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V658S15BC 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 70V658S15BC?
For technical support, including 70V658S15BC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V658S15BC requirements.
6.How does Aetrix verify that 70V658S15BC is sourced from the original manufacturer or authorized distributors?
All 70V658S15BC 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 70V658S15BC meets industry standards.
7.What is the process for return or replacement of 70V658S15BC?
All 70V658S15BC units undergo pre-shipment inspection (PSI). If there is an issue with 70V658S15BC, 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 70V658S15BC part is unused and in its original packaging.
Return procedure for 70V658S15BC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V658S15BC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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