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Renesas 709079L9PFI
- Part No.:
- 709079L9PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
709079L9PFI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,657
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Product details
Overview
709079L9PFI from Integrated Device Technology is a 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 15 ns clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply - deployed in high-throughput packet buffering and real-time DSP co-processing systems.
For engineers reviewing the 709079L9PFI datasheet, 709079L9PFI pinout, 709079L9PFI application, or 709079L9PFI equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable support for depth expansion without external logic, counter enable/reset functionality for burst address generation, and low standby power (1 mW typ.) in L-grade operation.
Technical Context
The 709079L9PFI implements fully synchronous operation on both ports with 4 ns setup and 1 ns hold times on all control, address, and data inputs, using edge-triggered registers for CLKR/CLKL. Its self-timed write architecture enables fast cycle time independent of clock low time, supporting 66.7 MHz operation in pipelined mode.
It features independent address strobe (ADSR/ADSL) and counter control (CNTENR/CNTRSTR, CNTENL/CNTRSTL) per port, allowing external address loading or internal counter-driven sequential access. A15 is NC per datasheet Note 1, confirming its identity as the 32K × 8 variant (IDT709079), not the 64K × 8 IDT709089.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32K × 8-bit (256 Kbit); matches IDT709079 designation and A15X = NC pin configuration. |
| Clock-to-Data (Pipelined) | 9 ns max; enables 66.7 MHz sustained throughput with one-cycle latency for deterministic timing in pipeline-critical systems. |
| Cycle Time (Pipelined) | 15 ns max; defines minimum clock period for continuous read/write bursts without dead cycles. |
| Standby Power (L-grade) | 1 mW typical; achieved via dual CE0/CE1-controlled power-down, critical for low-power industrial embedded operation. |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments with full AC/DC specs guaranteed across range. |
| Supply Voltage | 5.0 V ±10%; TTL-compatible interface eliminates level-shifting in legacy 5 V bus systems. |
| Package | 100-pin TQFP (PN100); 14 mm × 14 mm body per datasheet Note 4, RoHS-compliant green option available. |
Pinout & Package
709079L9PFI is housed in a 100-pin Thin Quad Flatpack (TQFP, PN100) with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. Pin 1 is marked by a black dot; all VCC and GND pins must be connected per datasheet Notes 2–3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKL / CLKR | Left/Right Port Clock Input | Rising-edge-triggered; clocks all input registers (address, data, control) and initiates synchronous operations per port. |
| CE0L/CE1L, CE0R/CE1R | Dual Chip Enables (per port) | Independent port disable: CE0 = LOW + CE1 = HIGH enables; CE0 = HIGH or CE1 = LOW powers down port circuitry. |
| R/WL / R/WR | Read/Write Control (per port) | Active-HIGH write enable; determines data direction on I/OxL/I/OxR buses during enabled cycles. |
| OEL / OER | Output Enable (asynchronous, per port) | Asynchronous control of I/O bus drivers; overrides clock timing to place outputs in high-Z state immediately. |
| FT/PIPEL / FT/PIPER | Output Mode Select (per port) | VIL = Flow-Through (0-cycle latency), VIH = Pipelined (1-cycle latency); configures internal output register staging. |
| A0L–A14L / A0R–A14R | Address Inputs (per port) | 15-bit address bus; A15 is NC per datasheet Note 1, confirming 32K (2¹⁵) addressing capability. |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional Data Bus (per port) | 8-bit parallel interface; supports concurrent read/write between ports with true dual-port cell architecture. |
| CNTENL/CNTRSTL, CNTENR/CNTRSTR | Counter Control (per port) | Enable or reset internal address counter; allows burst-mode sequential access without external address generation. |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous, conflict-free read/write access to identical addresses from left and right ports - essential for inter-processor communication buffers. |
| Pipelined Output Mode | Reduces effective read latency to 1 cycle with 9 ns tCD2, enabling deterministic timing in high-speed DSP and network forwarding pipelines. |
| Dual Chip Enables per Port | Allows seamless depth expansion of multiple 709079L9PFI devices without external decode logic - simplifies memory bank scaling in FPGA-based systems. |
| Integrated Address Counter | Eliminates need for external address sequencers in burst applications; CNTEN/CNTRST pins provide direct hardware control over sequential access patterns. |
| Low-Power Standby (1 mW) | Supports energy-sensitive industrial designs; achieved via CE-controlled shutdown of port-specific logic blocks while retaining memory state. |
Applications
| Telecom Packet Buffering | DSP Co-Processor Interface |
|---|---|
|
Use Scenario: Storing incoming/outgoing Ethernet or TDM packets in base station line cards where ingress and egress paths operate independently. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory between MAC controller (left port) and traffic manager ASIC (right port). Use Value: Simultaneous access eliminates arbitration delays; 15 ns cycle time sustains >66 Mbps line-rate buffering without backpressure. |
Use Scenario: Real-time audio/video processing where a host CPU writes coefficients while a dedicated DSP reads and executes filter kernels. IC Role / Device Role / Timing Role: Serves as low-latency coefficient/data exchange buffer with pipelined reads ensuring deterministic DSP instruction fetch timing. Use Value: 9 ns pipelined tCD2 guarantees coefficient availability at DSP clock edge, preventing pipeline stalls in FIR/IIR execution. |
| Industrial PLC I/O Mapping | Avionics Sensor Fusion Hub |
|
Use Scenario: Mapping sensor inputs and actuator outputs in modular programmable logic controllers requiring deterministic scan-cycle updates. IC Role / Device Role / Timing Role: Left port interfaces to real-time I/O controller (writing status), right port serves HMI or diagnostics processor (reading snapshot). Use Value: Industrial temp rating (–40°C to +85°C) and 1 mW standby ensure reliability in uncontrolled cabinet environments with infrequent access. |
Use Scenario: Aggregating inertial, GPS, and barometric data streams in flight control computers where redundancy and timing integrity are critical. IC Role / Device Role / Timing Role: Provides fault-isolated memory partitioning: left port for primary sensor chain, right port for backup chain with cross-check logic. Use Value: True dual-port architecture prevents read/write contention during concurrent sensor sampling and health monitoring cycles. |
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 | 32K × 16-bit, 15 ns, 3.3 V core; no integrated address counter; different pinout (100-pin TQFP but incompatible signal mapping). | Requires external address sequencing logic; suited for wider data paths but not drop-in replacement for 8-bit systems. | Select only if 16-bit bus width and 3.3 V operation are required; redesign needed for CE/R/W/OE signal routing and counter function emulation. |
| IDT70V9079L15PF | Same 32K × 8-bit spec, but -70V (lower voltage) variant: 3.3 V supply, 15 ns, industrial temp; pin-compatible but different VCC/GND pin assignments. | Targets mixed-voltage systems with 3.3 V logic; not interoperable with 5 V buses without level translation. | Choose for new 3.3 V designs seeking lower active power; verify VCC/GND pin locations against 709079L9PFI layout before reuse. |
Compared with CY7C028V-15AXC and IDT70V9079L15PF, the 709079L9PFI uniquely combines 5 V TTL compatibility, integrated address counter, and 1 mW standby in a single industrial-grade package - making it optimal for legacy 5 V control systems requiring minimal BOM changes and deterministic burst access.
Availability
709079L9PFI is available at Aetrix Electronics and suitable for telecom packet buffering, industrial PLC I/O mapping, and avionics sensor fusion hubs requiring stable component supply across extended product lifecycles.
Supply support for 709079L9PFI 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, is a fabless semiconductor company specializing in timing, memory interface, and RF solutions for communications and industrial markets.
The IDT7090xx family was designed specifically for high-reliability, synchronous dual-access memory applications in telecom infrastructure, test equipment, and real-time control systems - emphasizing deterministic timing, low power, and industrial environmental robustness.
FAQ
What is the memory organization of the 709079L9PFI?
The 709079L9PFI is a 32K × 8-bit synchronous dual-port static RAM, providing 262,144 bits of storage. Its A15 pin is No Connect (NC), confirming the 15-bit address space (2¹⁵ = 32,768 words). This matches the IDT709079 designation in the datasheet and distinguishes it from the 64K × 8 IDT709089 variant.
Does the 709079L9PFI support both pipelined and flow-through output modes?
Yes, the 709079L9PFI supports both modes via the FT/PIPEL and FT/PIPER pins. When driven LOW, it operates in flow-through mode (tCD1 = 30 ns max); when HIGH, it uses pipelined mode (tCD2 = 9 ns max). Each port can be configured independently, enabling mixed-mode system architectures.
How does the address counter function on the 709079L9PFI?
The 709079L9PFI includes independent address counters on both ports, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). With CNTEN = LOW at CLK rise, the counter advances automatically; CNTRST = LOW resets it to address 0. This eliminates external address generation in burst applications.
What is the standby power consumption of the 709079L9PFI?
The 709079L9PFI "L" grade delivers 1 mW typical standby power (ISB3) when both ports are fully disabled (CE0 and CE1 set to CMOS high-impedance levels). This ultra-low quiescent draw is achieved through internal power-gating and is specified across the full industrial temperature range (–40°C to +85°C).
Is the 709079L9PFI pin-compatible with other IDT7090xx devices?
No - the 709079L9PFI is not pin-compatible with IDT709089 variants due to A15 being NC (vs. functional in 64K versions), nor with 3.3 V derivatives like IDT70V9079L15PF due to differing VCC/GND pin allocations. Always verify pin functions against the specific device's datasheet diagram before board reuse.
709079L9PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- 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:
- 9 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
709079L9PFI FAQ
1.How can I place an order for 709079L9PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 709079L9PFI 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 709079L9PFI reliable?
The price and inventory of 709079L9PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 709079L9PFI is usually 5 days.
3.What payment methods are accepted for 709079L9PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 709079L9PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 709079L9PFI?
709079L9PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 709079L9PFI 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 709079L9PFI?
For technical support, including 709079L9PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 709079L9PFI requirements.
6.How does Aetrix verify that 709079L9PFI is sourced from the original manufacturer or authorized distributors?
All 709079L9PFI 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 709079L9PFI meets industry standards.
7.What is the process for return or replacement of 709079L9PFI?
All 709079L9PFI units undergo pre-shipment inspection (PSI). If there is an issue with 709079L9PFI, 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 709079L9PFI part is unused and in its original packaging.
Return procedure for 709079L9PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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