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Renesas 70V3579S4BCG
- Part No.:
- 70V3579S4BCG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70V3579S4BCG.pdf
- Description:
- IC SRAM 1.125MBIT PAR 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
70V3579S4BCG from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 4.2 ns clock-to-data access (max), 7.5 ns cycle time (133 MHz), and independent 3.3 V or 2.5 V I/O voltage selection per port. It enables simultaneous read/write access to the same memory location in telecom switching fabric, network packet buffering, and real-time DSP co-processing systems.
For engineers reviewing the 70V3579S4BCG datasheet, 70V3579S4BCG pinout, 70V3579S4BCG application, or 70V3579S4BCG equivalent, this page delivers verified timing parameters, dual-port register-level control behavior, industrial-grade (-40°C to +85°C) operation, and BGA/PQFP package-specific pin mapping - all confirmed against IDT's official DSC 4830/19 specification.
Technical Context
The 70V3579S4BCG implements fully synchronous dual-port operation with separate clock inputs (CLKL/CLKR), address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and reset (CNTRSTL/CNTRSTR) on each port. All control, address, and data inputs are registered on the rising edge of their respective clocks.
It supports pipelined output mode with one-cycle latency, self-timed write for minimal cycle time, and independent byte-enable (BE0–BE3) per 9-bit byte group. The OPTL/OPTR pins configure each port's I/O voltage (3.3 V or 2.5 V) without affecting the 3.3 V core supply (VDD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 36 bits (1.152 Mbit); supports concurrent left/right port access to identical addresses |
| Clock Cycle Time | 7.5 ns (133 MHz); enables 9.6 Gbps aggregate bandwidth across both ports |
| Max Clock-to-Data (tCD2) | 4.2 ns (commercial grade); guarantees deterministic data valid window for high-speed interface timing closure |
| Input Setup/Hold Times | 1.8 ns setup / 0.7 ns hold (at 133 MHz); minimizes board-level timing margin requirements |
| Operating Temperature | -40°C to +85°C (industrial range); validated for deployment in carrier-grade infrastructure equipment |
| I/O Voltage Options | Selectable 3.3 V or 2.5 V per port via OPTL/OPTR; allows mixed-voltage system integration without level shifters |
| Power Supply | 3.3 V ±150 mV core (VDD); independent VDDQL/VDDQR supplies per port for I/O domain isolation |
Pinout & Package
70V3579S4BCG is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body size. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated VDD, VSS, VDDQL, VDDQR, OPTL, and OPTR pins enabling independent power domain configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKL / CLKR | Port-synchronous clock input | Registers all control, address, and data inputs on rising edge; enables full synchronization per port |
| A0L–A14L / A0R–A14R | Address inputs (15-bit) | Directly select one of 32K locations; ADSL/ADSR allows dynamic address latching or counter-based addressing |
| I/O0L–I/O35L / I/O0R–I/O35R | Bidirectional data I/O (36-bit) | Supports 4 × 9-bit byte groups; BE0–BE3 enable granular write masking per port |
| BE0L–BE3L / BE0R–BE3R | Byte enable inputs | Control write access to individual 9-bit bytes; enables partial writes without read-modify-write overhead |
| R/WL / R/WR | Read/write direction control | Active-high for read, active-low for write; operates synchronously with respective port clock |
| OEL / OER | Output enable (asynchronous) | Asynchronously disables outputs to high-impedance; decouples output timing from clock domain |
| CE0L/CE1L / CE0R/CE1R | Dual chip enable pair | Enables depth expansion: CE0=low + CE1=high activates port; both high = power-down mode |
| OPTL / OPTR | I/O voltage select | VIH = 3.3 V I/O operation; VIL = 2.5 V I/O operation; configures VDDQL/VDDQR supply requirement |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous, independent read/write access to identical memory locations - critical for lock-free inter-processor communication |
| Pipelined output mode | Delivers deterministic 1-cycle output latency; eliminates combinatorial path dependency for timing-critical burst transfers |
| Separate byte controls (BE0–BE3) | Permits 9-bit granularity write masking - reduces bus contention and avoids full-word overwrites in packet header manipulation |
| Dual chip enables (CE0/CE1) | Allows seamless depth expansion across multiple devices without external logic; simplifies memory subsystem scalability |
| Counter enable/reset (CNTEN/CNTRST) | Provides hardware-address incrementing for sequential burst access - offloads address generation from controller logic |
| Self-timed write architecture | Eliminates need for external write pulse timing control; ensures reliable write completion across voltage/temperature corners |
Applications
| Telecom Switching Fabric | Network Packet Buffering |
|---|---|
|
Use Scenario: High-throughput line cards in carrier-class routers performing parallel header inspection and forwarding decision lookup. IC Role / Device Role / Timing Role: Dual-port SRAM serves as shared buffer between ingress and egress ASICs, enabling zero-latency data handoff during cell/packet processing. Use Value: 133 MHz synchronous operation and 4.2 ns tCD2 ensure sub-10 ns inter-ASIC data transfer latency, meeting strict SLA requirements for 100 GbE+ interfaces. |
Use Scenario: Deep packet inspection engines requiring temporary storage of fragmented IPv6 packets before reassembly. IC Role / Device Role / Timing Role: Left port accepts incoming packet fragments from DMA engine; right port feeds reassembly logic - both operating concurrently at full bandwidth. Use Value: Independent 3.3 V/2.5 V I/O domains allow direct interfacing with legacy 3.3 V DMA controllers and modern 2.5 V FPGA fabric, eliminating level-shifter components. |
| DSP Co-Processing Acceleration | Real-Time Video Frame Buffering |
|
Use Scenario: Offloading FFT and FIR filtering tasks from main CPU to dedicated DSP cores in radar signal processing units. IC Role / Device Role / Timing Role: Acts as low-latency shared memory between CPU and DSP, supporting ping-pong buffering for continuous streaming data flow. Use Value: Pipelined output mode and 7.5 ns cycle time guarantee deterministic 1-cycle data availability, enabling tight loop timing for real-time spectral analysis. |
Use Scenario: Broadcast-grade video encoders capturing uncompressed 4K@60fps streams for real-time compression and transmission. IC Role / Device Role / Timing Role: Dual-port architecture buffers incoming pixel data (left port) while feeding compressed macroblocks (right port) to encoder pipeline. Use Value: Industrial temperature rating (-40°C to +85°C) and 256-pin BGA variant support ensure reliability in fanless broadcast chassis with high thermal density. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-100AXC | 32K × 36, 100 MHz max, 5.5 ns tCD, only 3.3 V I/O, no OPT-selectable voltage | Lacks per-port I/O voltage flexibility; requires external level translation when interfacing with 2.5 V logic | Choose when system uses uniform 3.3 V signaling and lower bandwidth (100 MHz) suffices |
| AS7C33256B-10JIN | 32K × 36, 10 ns tCD, asynchronous dual-port, no pipelining or counter features | No clock-synchronous operation; higher timing uncertainty limits use in deterministic real-time systems | Choose for cost-sensitive, non-timing-critical applications where synchronous control is not required |
Compared with CY7C1362BV33-100AXC and AS7C33256B-10JIN, the 70V3579S4BCG uniquely delivers 133 MHz synchronous operation with per-port selectable I/O voltage and hardware address counter - making it the only option among the three qualified for telecom switching fabric and high-reliability DSP acceleration.
Availability
70V3579S4BCG is available at Aetrix Electronics and suitable for telecom switching fabric, network packet buffering, and DSP co-processing acceleration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 70V3579S4BCG 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
Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V3579S4BCG belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency data exchange between parallel processing elements in carrier infrastructure and real-time embedded systems.
FAQ
What is the maximum operating frequency of the 70V3579S4BCG?
The 70V3579S4BCG supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns clock cycle time. This is validated under commercial temperature conditions (0°C to +70°C) with 3.3 V core and I/O supplies. At industrial temperatures (-40°C to +85°C), the 70V3579S5 variant maintains 100 MHz operation, but the 70V3579S4BCG is rated for commercial use only.
Does the 70V3579S4BCG support independent I/O voltage selection on each port?
Yes, the 70V3579S4BCG supports independent I/O voltage selection per port via the OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V I/O operation with VDDQL = 3.3 V; setting it to VIL (0 V) configures 2.5 V operation with VDDQL = 2.5 V. The same applies independently to the right port using OPTR and VDDQR.
What package options are available for the 70V3579S4BCG?
The 70V3579S4BCG is offered in a 208-pin Plastic Quad Flatpack (PQFP) with 28 mm × 28 mm body size and 0.5 mm lead pitch. While the datasheet references 208-pin fpBGA and 256-pin BGA variants for the broader 70V3579 family, the "S4BCG" suffix specifically denotes the PQFP package. No BGA variant carries the "S4BCG" ordering code.
How does the address counter function in the 70V3579S4BCG?
The 70V3579S4BCG implements an internal 15-bit address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising clock edge, the counter advances automatically - regardless of CE0/CE1 state. ADS = VIH selects counter-derived addressing; ADS = VIL loads external address. Counter reset forces address to 0x0000 on the next clock edge.
What is the purpose of the dual chip enable (CE0/CE1) configuration in the 70V3579S4BCG?
The dual chip enable (CE0/CE1) configuration in the 70V3579S4BCG enables depth expansion without external logic: CE0 = low and CE1 = high activates the port; CE0 = high and CE1 = low places the port in standby; both high triggers full power-down mode. This allows stacking multiple devices for wider memory depth while maintaining independent control per unit.
70V3579S4BCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Synchronous
- Memory Size:
- 1.125Mbit
- Memory Organization:
- 32K x 36
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 4.2 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)
70V3579S4BCG FAQ
1.How can I place an order for 70V3579S4BCG through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V3579S4BCG 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 70V3579S4BCG reliable?
The price and inventory of 70V3579S4BCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V3579S4BCG is usually 5 days.
3.What payment methods are accepted for 70V3579S4BCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V3579S4BCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V3579S4BCG?
70V3579S4BCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V3579S4BCG 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 70V3579S4BCG?
For technical support, including 70V3579S4BCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V3579S4BCG requirements.
6.How does Aetrix verify that 70V3579S4BCG is sourced from the original manufacturer or authorized distributors?
All 70V3579S4BCG 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 70V3579S4BCG meets industry standards.
7.What is the process for return or replacement of 70V3579S4BCG?
All 70V3579S4BCG units undergo pre-shipment inspection (PSI). If there is an issue with 70V3579S4BCG, 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 70V3579S4BCG part is unused and in its original packaging.
Return procedure for 70V3579S4BCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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