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Renesas 70V9079S12PF8
- Part No.:
- 70V9079S12PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V9079S12PF8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
70V9079S12PF8 from IDT (now Renesas) is a high-speed 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports, 12ns max clock-to-data access in pipelined mode, LVTTL-compatible 3.3V ±0.3V operation, and integrated address counter for burst applications - used in real-time DSP co-processing and FPGA-based communication buffers.
For engineers reviewing the 70V9079S12PF8 datasheet, 70V9079S12PF8 pinout, 70V9079S12PF8 application, or 70V9079S12PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-port depth expansion capability via CE0/CE1 control, industrial temperature support (–40°C to +85°C), and low-power standby current of 0.4mA (typ.) in full CMOS-level standby mode.
Technical Context
This device implements fully synchronous dual-port architecture with independent clock inputs (CLKL/CLKR), registered address/data/control inputs, and self-timed write logic decoupled from clock edge timing. It supports two distinct output modes - flow-through (FT/PIPE = VIL) and pipelined (FT/PIPE = VIH) - each with dedicated AC timing parameters including tCD1 (≤25ns) and tCD2 (≤12ns) respectively.
The integrated address counter (enabled via CNTENL/CNTENR) allows automatic address increment on rising clock edges without external sequencing logic, while asynchronous OE and ADS inputs provide flexible bus interfacing. Dual chip enables (CE0X/CE1X per port) enable seamless depth expansion without additional glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), single-word access per port |
| Clock-to-Data Access (Pipelined) | ≤12ns max - enables 83MHz system clock synchronization with 1-cycle latency |
| Supply Voltage | 3.3V ±0.3V - compatible with LVTTL I/O and modern 3.3V logic domains |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and telecom infrastructure |
| Full Standby Current | 0.4mA (typ.) - achieved when both ports disabled with CMOS-level inputs |
| Package | 100-pin TQFP (14mm × 14mm × 1.4mm) - surface-mount compatible with standard reflow profiles |
| Output Mode Control | FT/PIPE pin per port - selects flow-through (0-latency) or pipelined (1-cycle latency) data path |
Pinout & Package
70V9079S12PF8 is housed in a 100-pin Thin Quad Flatpack (TQFP) package with exposed thermal pad (not electrically connected). Pin assignments follow JEDEC MO-140AC standard; A15R and A15L are no-connect (NC) pins per datasheet Note 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKL / CLKR | Port-specific clock input | Rising-edge triggered; clocks all registers (address, data, control) independently per port |
| CE0L/CE1L, CE0R/CE1R | Dual chip enable pair per port | CE0X = VIL & CE1X = VIH enables port; enables depth expansion without external logic |
| R/WL / R/WR | Read/write direction control | Synchronous active-low write enable; determines data flow direction on I/O bus |
| OEL / OER | Asynchronous output enable | Independent per port; controls I/O bus tristate without affecting internal timing |
| ADSL / ADSR | Address strobe | Loads external address into port register on rising clock edge; enables burst addressing |
| CNTRSTL / CNTRSTR | Counter reset | Resets internal address counter to A0 on next clock edge; no dead cycle required |
| CNTENL / CNTENR | Counter enable | Enables automatic address increment on rising clock; supports sequential burst reads/writes |
| FT/PIPEL / FT/PIPER | Output mode select | VIL = flow-through (0-cycle latency); VIH = pipelined (1-cycle latency, faster cycle time) |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables concurrent read and write to identical memory locations - critical for inter-processor communication and FIFO buffering |
| Self-timed write pulse | Decouples write completion from clock edge timing, enabling minimum cycle time regardless of clock skew |
| Dual chip enables per port | Supports depth expansion of multiple devices using only address MSBs - eliminates need for external decode logic |
| Integrated address counter | Reduces host processor overhead in burst transfers by auto-incrementing address on each clock cycle |
| Low-power standby modes | Four distinct standby states (ISB1–ISB4) allow fine-grained power management per port activity level |
Applications
| Telecom Line Card Buffering | FPGA-DSP Co-Processing Interface |
|---|---|
Use Scenario: High-throughput packet buffering between line interface ASIC and traffic management processor in 10Gbps Ethernet line cards. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory between ingress and egress data paths, synchronized to independent 83MHz clocks. Use Value: Enables deterministic latency <12ns for cross-port reads during concurrent writes, eliminating arbitration logic and reducing BOM count. | Use Scenario: Real-time data exchange between Xilinx Kintex FPGA and TI C66x DSP in radar signal processing subsystems. IC Role / Device Role / Timing Role: Serves as ping-pong buffer with pipelined output mode, allowing FPGA to write frame N while DSP reads frame N−1 synchronously. Use Value: 1-cycle pipelined latency ensures continuous data flow at 83MHz, sustaining >600MB/s aggregate bandwidth across both ports. |
| Industrial Motion Controller Memory | Avionics Data Acquisition Buffer |
Use Scenario: Storing interpolated motion profiles and encoder feedback in servo drive controllers operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Provides deterministic-access scratchpad memory for real-time trajectory calculation engine with dual-clock domain isolation. Use Value: Industrial temp grade and 0.4mA full-standby current ensure reliable operation during idle periods without thermal derating. | Use Scenario: Capturing high-speed sensor telemetry (16-bit ADC @ 1MHz) in DO-254-compliant flight data recorders. IC Role / Device Role / Timing Role: Acts as burst-capture buffer using address counter mode, accepting back-to-back samples without CPU intervention. Use Value: Counter enable/reset functionality allows precise frame-aligned capture windows with sub-microsecond trigger response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-15AXC | 15ns max tCD2 (vs. 12ns), 5V-tolerant I/O, no integrated address counter | Requires external counter logic for burst mode; suited for legacy 5V systems | Select if 5V interface compatibility is mandatory and 3ns timing margin is acceptable |
| AS7C33256P-12JIN | 12ns tCD2 but asynchronous interface, no pipelined mode, no dual CE per port | Lacks synchronous dual-port features - requires external arbitration for concurrent access | Choose only for cost-sensitive non-concurrent applications where timing determinism is not required |
Compared with CY7C028V-15AXC and AS7C33256P-12JIN, the 70V9079S12PF8 delivers superior deterministic latency (12ns pipelined), built-in burst addressing, and industrial-grade power efficiency - making it optimal for tightly coupled real-time systems requiring zero-wait-state dual-processor memory sharing.
Availability
70V9079S12PF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and FPGA-DSP co-processing applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 70V9079S12PF8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V9079S12PF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where concurrent access and precise timing control are critical.
FAQ
What is the maximum operating frequency of the 70V9079S12PF8 in pipelined output mode?
The 70V9079S12PF8 supports up to 83MHz operation in pipelined output mode, corresponding to a 12ns clock cycle time (tCYC2). This is validated across the full industrial temperature range (–40°C to +85°C) with 3.3V ±0.3V supply. The device achieves this frequency through registered inputs and self-timed write logic, ensuring setup/hold margins are met without external timing constraints. The 70V9079S12PF8 datasheet specifies tCH2/tCL2 minima of 8ns each to maintain signal integrity at this rate.
Does the 70V9079S12PF8 support true simultaneous read-write access to the same memory location?
Yes, the 70V9079S12PF8 uses true dual-ported memory cells that allow independent, concurrent read and write operations to the exact same address from the left and right ports. This capability is fundamental to its architecture and is explicitly confirmed in the Functional Block Diagram and Features section of the datasheet. No arbitration or conflict resolution logic is required - the 70V9079S12PF8 guarantees atomic access with deterministic timing for both ports.
How does the address counter function in the 70V9079S12PF8, and what signals control it?
The 70V9079S12PF8 integrates a synchronous address counter per port controlled by CNTENX (counter enable) and CNTRSTX (counter reset) inputs. When CNTENX = VIL on the rising edge of CLKX, the internal address increments automatically - even if ADSX = VIH. CNTRSTX = VIL resets the counter to A0 on the next clock edge. The 70V9079S12PF8 datasheet confirms this behavior in Truth Table II and Figure 3750 drw 14–17, with no dead cycles during reset.
What power-saving modes does the 70V9079S12PF8 offer, and how low is standby current?
The 70V9079S12PF8 provides four standby modes: ISB1 (both ports TTL-disabled, 40mA typ.), ISB2 (one port active, 100mA typ.), ISB3 (full CMOS-level standby, 0.4mA typ.), and ISB4 (one port CMOS-standby, 90mA typ.). The lowest power state - ISB3 - draws just 0.4mA typical with both ports fully disabled and all inputs held at valid CMOS levels (VIL < 0.2V or VIH > VDD − 0.2V), as specified in Table 3750 tbl 09b for the 'L' speed grade matching 70V9079S12PF8.
Is the 70V9079S12PF8 pin-compatible with other members of the IDT70V9089/79 family?
Yes, the 70V9079S12PF8 shares identical pinout and package (100-pin TQFP) with all IDT70V9089/79 family variants, including 70V9089S12PF8. Key pin equivalences include NC status for A15R/A15L (per datasheet Note 1), identical placement of dual CE/FT/PIPE/OE/ADS/CNTEN/CNTRST signals, and consistent power/ground distribution. This allows direct substitution within the same speed/temperature grade without PCB modification.
70V9079S12PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Synchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 12 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V9079S12PF8 FAQ
1.How can I place an order for 70V9079S12PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V9079S12PF8 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 70V9079S12PF8 reliable?
The price and inventory of 70V9079S12PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V9079S12PF8 is usually 5 days.
3.What payment methods are accepted for 70V9079S12PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V9079S12PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V9079S12PF8?
70V9079S12PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V9079S12PF8 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 70V9079S12PF8?
For technical support, including 70V9079S12PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V9079S12PF8 requirements.
6.How does Aetrix verify that 70V9079S12PF8 is sourced from the original manufacturer or authorized distributors?
All 70V9079S12PF8 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 70V9079S12PF8 meets industry standards.
7.What is the process for return or replacement of 70V9079S12PF8?
All 70V9079S12PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V9079S12PF8, 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 70V9079S12PF8 part is unused and in its original packaging.
Return procedure for 70V9079S12PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V9079S12PF8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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