Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 709079L12PF8

Name: 709079L12PF8
Brand: Renesas
SKU: 709079L12PF8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 709079L12PF8

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 709079L12PF8.pdf

Description:: IC SRAM 256KBIT PARALLEL 100TQFP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,371

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

709079L12PF8 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, 12 ns pipelined clock-to-data access (max), 20 ns pipelined cycle time, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply - used in real-time DSP co-processing and high-speed inter-processor communication buffers.

For engineers reviewing the 709079L12PF8 datasheet, 709079L12PF8 pinout, 709079L12PF8 application, or 709079L12PF8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade timing behavior, and peer-validated alternative parts for synchronous dual-port SRAM selection in deterministic embedded systems.

Technical Context

The 709079L12PF8 implements fully synchronous operation on both ports with registered address, data, and control inputs-requiring only 4 ns setup and 1 ns hold relative to CLK. Its dual-chip-enable architecture (CE0/CE1 per port) enables depth expansion without external logic, while independent ADS strobes per port allow asynchronous address latching alongside synchronous clocking.

It supports two output modes: flow-through (with 25 ns cycle time) and pipelined (with 20 ns cycle time), selected via FT/PIPE pin. The integrated address counter-enabled by CNTEN and reset by CNTRST-operates independently per port and advances on rising CLK when ADS = VIH, enabling burst sequential access without external address generation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 8-bit (256 Kbit), fixed configuration for IDT709079 family - no A15 pin used (NC), simplifying PCB layout vs. 64K variant.
Pipelined Cycle Time	20 ns (max), enabling 50 MHz sustained operation - directly determines minimum clock period for burst read/write sequences.
Active Power (Typ)	950 mW at 5 V - consistent across S/L variants; low-power L version reduces standby current to 1 mW (typ), critical for always-on subsystems.
Operating Temperature	–40°C to +85°C - qualified for industrial environments; not commercial-only like 9 ns/15 ns variants.
Package	100-pin Thin Quad Flatpack (TQFP, PN100), 14 mm × 14 mm × 1.4 mm body - standard footprint compatible with automated SMT assembly.
Input Timing Margin	4 ns setup / 1 ns hold on all synchronous inputs (address, data, CE0/CE1, R/W, ADS, CNTEN, CNTRST) - relaxes board-level timing closure requirements.
Output Enable Latency	tOE = 12 ns (max) - defines worst-case delay from OE assertion to valid data, essential for asynchronous bus arbitration.

Pinout & Package

709079L12PF8 is housed in a 100-pin TQFP (PN100) package with exposed thermal pad (not electrically connected). All VCC pins must be decoupled locally; all GND pins require low-inductance grounding. Pin 1 is marked by a black dot; pin numbering follows counter-clockwise rotation from top-left corner.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A14L	Left-port address inputs	15-bit address bus for left port; A15L is NC per datasheet Note 1 - confirms 32K (2¹⁵) addressing, not 64K.
A0R–A14R	Right-port address inputs	15-bit address bus for right port; A15R is NC - ensures identical 32K addressing on both ports.
I/O0L–I/O7L	Left-port bidirectional data bus	8-bit data path; high-impedance when OEL = VIH or CE0L/CE1L disable port - enables shared bus topology.
I/O0R–I/O7R	Right-port bidirectional data bus	8-bit data path; independent of left port - allows concurrent read/write between processors or cores.
CLKL / CLKR	Left/right port clock inputs	Rising-edge-triggered; all registers (address, data, control) sample on CLK rise - eliminates metastability in synchronous designs.
CE0L/CE1L, CE0R/CE1R	Dual chip enables per port	CE0X = VIL AND CE1X = VIH enables port X; either CE0X = VIH OR CE1X = VIL disables - enables power-down and depth expansion.
R/WL / R/WR	Left/right port read/write control	Active-HIGH write enable; synchronous with CLK - defines data direction for current cycle after setup/hold timing met.
OEL / OER	Left/right port output enable	Asynchronous; overrides R/W state - allows immediate tri-state for bus sharing without waiting for clock edge.
ADSL / ADSR	Left/right port address strobe	Asynchronous latch control; loads address on rising CLK when ADS = VIH - enables external address generation or counter mode.
CNTRSTL / CNTRSTR	Left/right port counter reset	Asynchronous active-HIGH reset - forces internal address counter to 0, required before burst sequences or error recovery.
CNTENL / CNTENR	Left/right port counter enable	Synchronous active-LOW enable - advances internal address counter on rising CLK when ADS = VIH, enabling auto-increment bursts.
FT/PIPEL / FT/PIPER	Left/right port output mode select	DC-controlled; VIH = pipelined (1-cycle latency), VIL = flow-through (0-cycle latency) - configures timing model per port independently.
VCC / GND	Power and ground	Multiple VCC/GND pairs distributed across package - mandatory for noise suppression and signal integrity at 50 MHz operation.

Key Features

Feature	Design Value
True dual-port memory cells	Enables simultaneous, conflict-free read/write to identical addresses - eliminates arbitration logic in tightly coupled dual-CPU systems.
Self-timed internal write pulse	Decouples write completion from clock edge timing - guarantees reliable writes even with marginal clock duty cycle or jitter.
Independent per-port address counters	Allows left and right ports to run autonomous burst sequences (e.g., DMA engine + CPU) without shared address bus or software coordination.
Dual chip enables (CE0/CE1)	Permits seamless depth expansion of multiple 709079L12PF8 devices using only address MSBs - no glue logic required for >32K capacity.
Asynchronous output enable (OE)	Supports legacy asynchronous buses (e.g., ISA, VME) while maintaining full synchronous internal operation - simplifies migration paths.

Applications

Real-Time Digital Signal Processing	High-Speed Inter-Processor Communication
Use Scenario: Two DSPs share a common buffer for audio frame exchange with deterministic latency. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory; left port serves DSP-A, right port serves DSP-B, with pipelined mode enabling 50 MHz throughput. Use Value: Eliminates software semaphore overhead and hardware arbitration logic, reducing inter-DSP latency to ≤20 ns per word transfer.	Use Scenario: ARM Cortex-A9 MPCore and FPGA fabric exchange sensor fusion data in automotive ADAS domain controller. IC Role / Device Role / Timing Role: 709079L12PF8 provides synchronized, non-blocking memory access between heterogeneous processors operating at different clock domains. Use Value: Enables lock-free data passing with guaranteed atomicity per 8-bit byte, meeting ASIL-B timing constraints for <5 µs cross-core response.
Burst-Mode DMA Buffering	Industrial PLC I/O Data Exchange
Use Scenario: Microcontroller-based motion controller uses DMA to stream position setpoints into servo drive while reading encoder feedback. IC Role / Device Role / Timing Role: Left port accepts DMA writes from MCU; right port feeds real-time reads to servo ASIC - address counters auto-increment during bursts. Use Value: Sustains 40 MB/s continuous data rate (8-byte × 50 MHz) without CPU intervention, freeing MCU for PID computation.	Use Scenario: Modular PLC backplane requires deterministic cyclic data exchange between CPU module and I/O modules over parallel bus. IC Role / Device Role / Timing Role: 709079L12PF8 serves as cyclic buffer between CPU's scan cycle and I/O module's update cycle - each port operates at its native timing. Use Value: Guarantees <100 ns inter-module data handoff jitter, satisfying IEC 61131-3 cycle time stability requirements for safety-critical motion control.

Real-Time Digital Signal Processing

High-Speed Inter-Processor Communication

Use Scenario: Two DSPs share a common buffer for audio frame exchange with deterministic latency.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory; left port serves DSP-A, right port serves DSP-B, with pipelined mode enabling 50 MHz throughput.

Use Value: Eliminates software semaphore overhead and hardware arbitration logic, reducing inter-DSP latency to ≤20 ns per word transfer.

Use Scenario: ARM Cortex-A9 MPCore and FPGA fabric exchange sensor fusion data in automotive ADAS domain controller.

IC Role / Device Role / Timing Role: 709079L12PF8 provides synchronized, non-blocking memory access between heterogeneous processors operating at different clock domains.

Use Value: Enables lock-free data passing with guaranteed atomicity per 8-bit byte, meeting ASIL-B timing constraints for <5 µs cross-core response.

Burst-Mode DMA Buffering

Industrial PLC I/O Data Exchange

Use Scenario: Microcontroller-based motion controller uses DMA to stream position setpoints into servo drive while reading encoder feedback.

IC Role / Device Role / Timing Role: Left port accepts DMA writes from MCU; right port feeds real-time reads to servo ASIC - address counters auto-increment during bursts.

Use Value: Sustains 40 MB/s continuous data rate (8-byte × 50 MHz) without CPU intervention, freeing MCU for PID computation.

Use Scenario: Modular PLC backplane requires deterministic cyclic data exchange between CPU module and I/O modules over parallel bus.

IC Role / Device Role / Timing Role: 709079L12PF8 serves as cyclic buffer between CPU's scan cycle and I/O module's update cycle - each port operates at its native timing.

Use Value: Guarantees <100 ns inter-module data handoff jitter, satisfying IEC 61131-3 cycle time stability requirements for safety-critical motion control.

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 organization, 15 ns pipelined cycle, 3.3 V supply - wider data bus, lower voltage, no 5 V tolerance.	Requires level-shifting for 5 V systems; suited for new 3.3 V designs where bandwidth >64 MB/s is needed.	Select if migrating to 3.3 V ecosystem and requiring 16-bit data path; not drop-in for 709079L12PF8 due to voltage and bus width mismatch.
IDT70V9279L12PF	Voltage-compatible 3.3 V variant of same architecture, 12 ns pipelined timing, identical 32K × 8 organization and pinout - but 3.3 V only.	Direct replacement only in 3.3 V designs; incompatible with 5 V buses without translation.	Choose for 3.3 V systems needing identical functionality and timing; verify VCC tolerance and I/O voltage levels match host interface.

Compared with CY7C028V-15AXC and IDT70V9279L12PF, the 709079L12PF8 uniquely supports 5 V TTL interfaces and industrial temperature range within the same 12 ns timing grade - making it the sole option for legacy 5 V deterministic control systems requiring guaranteed –40°C to +85°C operation.

Availability

709079L12PF8 is available at Aetrix Electronics and suitable for real-time DSP buffering, inter-processor communication, and industrial PLC I/O data exchange requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature qualification.

Supply support for 709079L12PF8 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 power solutions for communications, computing, and industrial markets.

The IDT709079 series was designed specifically for deterministic, low-latency memory sharing between synchronous processors - targeting applications where arbitration overhead, voltage translation, or temperature derating cannot be tolerated.

FAQ

What is the maximum operating frequency of the 709079L12PF8 in pipelined mode?

The 709079L12PF8 supports a maximum clock frequency of 50 MHz in pipelined output mode, derived from its 20 ns maximum pipelined cycle time (tCYC2). This timing is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5 V ±10% supply, making it suitable for deterministic real-time systems where clock margin is critical. The 709079L12PF8 achieves this without requiring external PLLs or clock multipliers.

Does the 709079L12PF8 support independent output modes on left and right ports?

Yes, the 709079L12PF8 supports independent output mode selection per port via dedicated FT/PIPEL and FT/PIPER pins. Setting FT/PIPEL = VIH configures the left port for pipelined operation (1-cycle latency), while FT/PIPER = VIL configures the right port for flow-through operation (0-cycle latency). This flexibility allows mixed-mode system architectures - for example, a CPU port using pipelined mode for throughput and a DMA port using flow-through for minimal latency - all within a single 709079L12PF8 device.

How does the address counter function in the 709079L12PF8, and what signals control it?

The 709079L12PF8 implements independent 15-bit address counters for left and right ports, controlled by CNTENL/CNTENR (synchronous enable) and CNTRSTL/CNTRSTR (asynchronous reset). When ADS = VIH and CNTEN = VIL, the counter advances on each rising CLK edge, generating sequential addresses without external logic. This feature is confirmed in Truth Table II and timing diagrams (e.g., Figure 15), and is fully functional in both flow-through and pipelined modes of the 709079L12PF8.

Is the 709079L12PF8 pin-compatible with the 709089L12PF8?

No, the 709079L12PF8 is not pin-compatible with the 709089L12PF8. While both use the same 100-pin TQFP package and share most signal names, the 709079L12PF8 has A15L and A15R designated as No Connect (NC) per datasheet Note 1, whereas the 709089L12PF8 uses A15 pins for 64K addressing. This difference affects address bus routing and requires distinct PCB layouts - the 709079L12PF8 is a 32K × 8 device, and the 709089L12PF8 is a 64K × 8 device.

What power-saving features does the 709079L12PF8 provide in standby mode?

The 709079L12PF8 offers multi-level standby power management: full standby (ISB3) draws just 0.2 mA (typ) when both ports are disabled with CMOS-level inputs; partial standby (ISB4) draws 120 mA (typ) when one port is active and the other is disabled. These values are specified in Table 9 of the datasheet for the L-version. The 709079L12PF8 achieves ultra-low 1 mW (typ) standby power - significantly lower than the S-version's 5 mW - making it ideal for battery-backed or energy-constrained industrial nodes.

709079L12PF8 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:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

709079L12PF8 FAQ

1.How can I place an order for 709079L12PF8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 709079L12PF8 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 709079L12PF8 reliable?

The price and inventory of 709079L12PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 709079L12PF8 is usually 5 days.

3.What payment methods are accepted for 709079L12PF8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 709079L12PF8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 709079L12PF8?

709079L12PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 709079L12PF8 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 709079L12PF8?

For technical support, including 709079L12PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 709079L12PF8 requirements.

6.How does Aetrix verify that 709079L12PF8 is sourced from the original manufacturer or authorized distributors?

All 709079L12PF8 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 709079L12PF8 meets industry standards.

7.What is the process for return or replacement of 709079L12PF8?

All 709079L12PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 709079L12PF8, 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 709079L12PF8 part is unused and in its original packaging.

Return procedure for 709079L12PF8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…