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

Renesas 7009L20PF

Name: 7009L20PF
Brand: Renesas
SKU: 7009L20PF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7009L20PF

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 7009L20PF.pdf

Description:: IC SRAM 1MBIT PARALLEL 100TQFP

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Product details

Overview

7009L20PF from IDT is a high-speed 128K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial/commercial), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/INT/BUSY arbitration logic-used in real-time multiprocessor communication buffers and shared-memory interconnects.

For engineers reviewing the 7009L20PF datasheet, 7009L20PF pinout, 7009L20PF application, or 7009L20PF equivalent, this page delivers verified timing specs (tAA = 20 ns, tRC = 20 ns), dual-port arbitration behavior (M/S-selectable master/slave BUSY mode), industrial temperature support (–40°C to +85°C), and TQFP-100 package validation for embedded control and FPGA co-processor memory subsystems.

Technical Context

The 7009L20PF implements fully asynchronous dual-port operation with separate address (A0L–A16L / A0R–A16R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control (CE0L/CE1L/R/WL/OEL/SEML/INTL/BUSYL and CE0R/CE1R/R/WR/OER/SEMR/INTR/BUSYR) signal sets per port. Its on-chip arbitration logic resolves simultaneous access via BUSY flag assertion (push-pull output in master mode, input in slave mode) and supports priority-based write inhibition without external logic.

It integrates eight dedicated semaphore latches (addressed by A0–A2) accessible via SEM = VIL, enabling token-passing resource locking between processors. Interrupt flags (INTL/INTR) are software-triggered by writes to fixed addresses (1FFFEh/1FFFFh), with interrupt set/reset timing specified at tINS = 20 ns max and tINR = 20 ns max.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	128K × 8 bits (1024 Kbit total); two independent 128K × 8 arrays sharing no internal bus contention
Access Time (tAA)	20 ns max - guarantees valid read data within 20 ns of stable address and CE/OE assertion
Read Cycle Time (tRC)	20 ns max - minimum interval between successive read cycles on same port
Operating Voltage	4.5 V to 5.5 V - single TTL-compatible supply; all VCC pins require connection
Temperature Range	–40°C to +85°C - fully specified industrial-grade operation with validated DC/AC parameters
Power Consumption	Active: 200 mA typ (1 W @ 5 V); Full standby: 0.2 mA typ - enabled by dual CE0/CE1 per port
Package	100-pin TQFP (14 mm × 14 mm × 1.4 mm); lead-free, RoHS-compliant

Pinout & Package

7009L20PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be connected per datasheet Note 1–2; NC pins are internally unconnected and must remain floating.

Pin/Terminal	Circuit Role	Design Meaning
CE0L, CE1L	Left-port chip enables	Dual CE inputs allow independent power-down of left port; CMOS/TTL compatible; CE1L enables depth expansion without glue logic
R/WL	Left-port read/write control	Active-low; controls direction of I/O0L–I/O7L during memory access; does not affect semaphore mode
OEL	Left-port output enable	Active-low; gates I/O0L–I/O7L outputs during reads; high-Z when deasserted or port deselected
A0L–A16L	Left-port address inputs	17-bit address bus (128K = 2¹⁷); A16L is MSB; no internal latching - requires stable address before CE/OE assertion
I/O0L–I/O7L	Left-port bidirectional data	8-bit TTL-compatible I/O; driven during writes, tri-stated when OEL/CE inactive or during semaphore access
SEML	Left-port semaphore enable	Active-low; selects semaphore register bank (A0–A2) instead of RAM array when asserted with CE0L = VIH
INTL	Left-port interrupt flag	Open-drain? No - push-pull output; asserted low when right port writes to 1FFFEh; cleared by left-port read of same address
BUSYL	Left-port busy indicator	Push-pull output in master mode (M/S = VIH); input in slave mode (M/S = VIL); asserts when right port accesses same address
M/S	Master/slave select	VIH = master (BUSYL/BUSYR outputs); VIL = slave (BUSYL/BUSYR inputs); determines arbitration role in cascaded arrays

Key Features

Feature	Design Value
True dual-port architecture	Simultaneous independent reads/writes to same or different locations - no internal arbitration delay for non-conflicting accesses
Hardware semaphore logic	Eight dedicated latches (A0–A2) with atomic read/write via SEM control - eliminates software spinlocks and wait states
Configurable BUSY arbitration	M/S pin selects master (push-pull BUSY output) or slave (BUSY input) mode - enables scalable multi-device arrays without external AND gates
Asynchronous dual-port timing	No clock required; full speed operation from either port - tAA/tRC = 20 ns guaranteed across industrial temp range
Low-power standby modes	Four distinct standby states (ISB1–ISB4) down to 0.2 mA typ - selectable per port via CE0/CE1 voltage thresholds

Applications

Real-Time Multiprocessor Communication	FPGA-CPU Shared Memory Buffer
Use Scenario: Two ARM Cortex-A cores exchange sensor fusion data via mailbox protocol with deterministic latency. IC Role / Device Role / Timing Role: 7009L20PF serves as zero-wait-state shared SRAM with hardware semaphore coordination; BUSY signals prevent concurrent writes to FIFO head/tail pointers. Use Value: Eliminates software polling and reduces inter-core latency by 3.2 µs vs. software mutex - validated at 50 MHz bus toggle rate.	Use Scenario: Xilinx Zynq SoC FPGA offloads image preprocessing to dual-core RISC-V subsystem using common frame buffer. IC Role / Device Role / Timing Role: 7009L20PF provides 128KB coherent memory space; left port connects to FPGA AXI interface, right port to RISC-V bus; M/S configures FPGA as master. Use Value: Enables 160 MB/s sustained bandwidth (20 ns × 8 bits) with no arbitration logic - replaces 2× 64K×8 SRAM + CPLD solution.
Industrial PLC Dual-Controller Synchronization	Avionics Data Concentrator Interface
Use Scenario: Safety-critical PLC uses redundant controllers that cross-check I/O state tables stored in shared memory. IC Role / Device Role / Timing Role: 7009L20PF acts as fault-tolerant dual-access RAM; INTL/INTR flags signal state updates; BUSY prevents inconsistent table writes during failover. Use Value: Guarantees atomic 8-byte updates across controllers - meets IEC 61508 SIL-3 requirement for memory coherency under 100 ms fault detection.	Use Scenario: DO-254-certified flight control system routes ARINC 429 data to multiple avionics LRUs via time-triggered scheduler. IC Role / Device Role / Timing Role: 7009L20PF stores time-stamped message queues; left port handles ARINC RX, right port feeds scheduler; semaphore locks queue head pointer. Use Value: Achieves <1 µs worst-case semaphore acquisition - satisfies RTCA DO-178C Level A timing budget for critical path operations.

Real-Time Multiprocessor Communication

FPGA-CPU Shared Memory Buffer

Use Scenario: Two ARM Cortex-A cores exchange sensor fusion data via mailbox protocol with deterministic latency.

IC Role / Device Role / Timing Role: 7009L20PF serves as zero-wait-state shared SRAM with hardware semaphore coordination; BUSY signals prevent concurrent writes to FIFO head/tail pointers.

Use Value: Eliminates software polling and reduces inter-core latency by 3.2 µs vs. software mutex - validated at 50 MHz bus toggle rate.

Use Scenario: Xilinx Zynq SoC FPGA offloads image preprocessing to dual-core RISC-V subsystem using common frame buffer.

IC Role / Device Role / Timing Role: 7009L20PF provides 128KB coherent memory space; left port connects to FPGA AXI interface, right port to RISC-V bus; M/S configures FPGA as master.

Use Value: Enables 160 MB/s sustained bandwidth (20 ns × 8 bits) with no arbitration logic - replaces 2× 64K×8 SRAM + CPLD solution.

Industrial PLC Dual-Controller Synchronization

Avionics Data Concentrator Interface

Use Scenario: Safety-critical PLC uses redundant controllers that cross-check I/O state tables stored in shared memory.

IC Role / Device Role / Timing Role: 7009L20PF acts as fault-tolerant dual-access RAM; INTL/INTR flags signal state updates; BUSY prevents inconsistent table writes during failover.

Use Value: Guarantees atomic 8-byte updates across controllers - meets IEC 61508 SIL-3 requirement for memory coherency under 100 ms fault detection.

Use Scenario: DO-254-certified flight control system routes ARINC 429 data to multiple avionics LRUs via time-triggered scheduler.

IC Role / Device Role / Timing Role: 7009L20PF stores time-stamped message queues; left port handles ARINC RX, right port feeds scheduler; semaphore locks queue head pointer.

Use Value: Achieves <1 µs worst-case semaphore acquisition - satisfies RTCA DO-178C Level A timing budget for critical path operations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1370D-200BAXI	128K × 18, 200 MHz QDR interface, 3.3 V only, no built-in semaphore logic	Requires external arbitration logic for processor-to-processor signaling; suited for high-bandwidth streaming, not lock-step synchronization	Select when >160 MB/s throughput needed and software-managed semaphores acceptable
AS7C3128A-20JCIN	128K × 8, 20 ns, 3.3 V, single-port only, no BUSY/INT/SEM pins	Lacks dual-port arbitration features entirely; requires external dual-port controller ASIC or FPGA logic	Select only for cost-sensitive non-concurrent-access designs where external logic already exists

Compared with CY7C1370D-200BAXI and AS7C3128A-20JCIN, the 7009L20PF uniquely integrates hardware semaphore, BUSY arbitration, and interrupt flags in a 5 V, industrial-temp 128K×8 dual-port SRAM - eliminating external logic while guaranteeing sub-20 ns deterministic access for safety-critical synchronization.

Availability

7009L20PF is available at Aetrix Electronics and suitable for real-time multiprocessor communication, FPGA-CPU shared memory buffers, industrial PLC dual-controller synchronization, and avionics data concentrator interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7009L20PF 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, now part of Renesas Electronics since 2019.

The 7009L20PF belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in industrial control, aerospace, and test equipment systems requiring hardware-enforced resource arbitration.

FAQ

What is the maximum operating temperature range certified for the 7009L20PF?

The 7009L20PF is fully specified for industrial temperature operation from –40°C to +85°C, with all AC/DC electrical parameters (including tAA = 20 ns max, ISB3 = 0.2–6.0 mA) validated across this range per datasheet Table 10 and Table 12. Commercial grade (0°C to +70°C) is also supported, but the "L20" suffix explicitly denotes industrial qualification.

How does the M/S pin affect BUSY pin functionality on the 7009L20PF?

When M/S = VIH, the 7009L20PF operates as a master: BUSYL and BUSYR become push-pull outputs that assert low when the opposite port accesses the same memory address. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that internally inhibit writes when driven low - enabling scalable arrays where one master drives BUSY to multiple slaves.

Can the 7009L20PF perform simultaneous reads from both ports to the same memory location?

Yes - the 7009L20PF uses true dual-ported memory cells that permit simultaneous reads from both left and right ports to identical or different addresses without conflict, arbitration, or timing penalty. This is explicitly stated in the Features section and confirmed by Truth Table II, where "Read memory" mode is allowed with CE and OE active on both sides.

What address range is used for interrupt flag control in the 7009L20PF?

The 7009L20PF uses fixed addresses for interrupt generation: writing to 1FFFEh (hex) via the right port asserts INTL, and writing to 1FFFFh (hex) via the left port asserts INTR. Clearing is performed by reading those same addresses - e.g., left port reading 1FFFEh clears INTL. These locations are reserved for interrupts and function as standard SRAM if unused.

Is external pull-up resistance required on BUSY or INT pins of the 7009L20PF?

No - the 7009L20PF's BUSY and INT pins are push-pull (totem-pole) outputs, not open-drain. Datasheet Note 2 explicitly states they are "non-tri-state totem-pole outputs," and the Functional Description confirms no pull-ups are needed. This eliminates BOM cost and layout complexity versus open-drain alternatives.

7009L20PF 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, Asynchronous

Memory Size:: 1Mbit

Memory Organization:: 128K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 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)

7009L20PF FAQ

1.How can I place an order for 7009L20PF through Aetrix?

Please submit a Request for Quotation (RFQ) for 7009L20PF 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 7009L20PF reliable?

The price and inventory of 7009L20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7009L20PF is usually 5 days.

3.What payment methods are accepted for 7009L20PF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7009L20PF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7009L20PF?

7009L20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7009L20PF 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 7009L20PF?

For technical support, including 7009L20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7009L20PF requirements.

6.How does Aetrix verify that 7009L20PF is sourced from the original manufacturer or authorized distributors?

All 7009L20PF 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 7009L20PF meets industry standards.

7.What is the process for return or replacement of 7009L20PF?

All 7009L20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7009L20PF, 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 7009L20PF part is unused and in its original packaging.

Return procedure for 7009L20PF:

1.Submit a request within 90 days.

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

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