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

Renesas 70V08L20PF

Name: 70V08L20PF
Brand: Renesas
SKU: 70V08L20PF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V08L20PF

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 70V08L20PF.pdf

Description:: IC SRAM 512KBIT PARALLEL 100TQFP

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Product details

Overview

70V08L20PF from IDT (Integrated Device Technology) is a high-speed, 3.3V, 64K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial grade), on-chip semaphore and interrupt logic, and full asynchronous operation - used in real-time interprocessor communication, DSP co-processing, and FPGA-based data buffering systems.

For engineers reviewing the 70V08L20PF datasheet, 70V08L20PF pinout, 70V08L20PF application, or 70V08L20PF equivalent, key selection criteria include simultaneous port arbitration timing (tBDD ≤ 35 ns), BUSY flag behavior under M/S = VIH/VIL configuration, dual CE support for depth expansion, and TQFP-100 thermal/power profile in industrial temperature range (–40°C to +85°C).

Technical Context

The 70V08L20PF implements fully independent left and right memory ports with separate address buses (A0L–A15L / A0R–A15R), control signals (CE0L/CE1L, R/WL, OEL / CE0R/CE1R, R/WR, OER), and bidirectional I/O banks (I/O0L–I/O7L / I/O0R–I/O7R). Each port supports TTL-compatible 3.3V signaling and operates asynchronously without shared clocks.

On-chip arbitration uses push-pull BUSY flags (BUSYL/BUSYR) and master/slave select (M/S) to resolve contention during simultaneous access to identical addresses; semaphore logic (SEML/SEMR) enables eight hardware-managed mutual-exclusion flags via A0–A2 addressing, while INTL/INTR flags provide mailbox-style inter-port notification at fixed addresses FFFE_H and FFFF_H.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	64K × 8 bits (512 Kbit total); supports independent read/write per port to any location
Access Time (tAA)	20 ns max (industrial grade); guarantees valid data within 20 ns after address stabilization
Supply Voltage	3.3 V ± 0.3 V; LVTTL-compatible I/O; all VDD pins require decoupling to 3.3 V rail
Operating Temperature	–40°C to +85°C; qualified for industrial environments with full DC/AC spec compliance
Power Consumption	Active: 550 mW typ. (both ports active); Full standby: 1 mW typ. (ISB3 mode, CMOS-level inputs)
Package	100-pin Thin Quad Flatpack (TQFP); 14 mm × 14 mm × 1.4 mm body; RoHS-compliant green variant available
Arbitration Latency	tBDD ≤ 35 ns (BUSY disable to valid read data); ensures deterministic resolution of port-to-port write contention

Pinout & Package

70V08L20PF is housed in a 100-pin TQFP (PNG100) package with 0.5 mm pitch, requiring strict adherence to VDD/GND pin distribution: 12 VDD and 16 VSS pins distributed across all four sides for low-noise power delivery. Pin 1 is located at top-left corner (marking dot adjacent).

Pin/Terminal	Circuit Role	Design Meaning
A0L–A15L	Left port address inputs	16-bit address bus for left-side memory access; must be stable before CE0L/CE1L assertion
A0R–A15R	Right port address inputs	16-bit address bus for right-side memory access; fully independent of left port timing
I/O0L–I/O7L	Left port bidirectional data	8-bit data path; direction controlled by R/WL and OEL; high-impedance when OEL = VIH or CE0L/CE1L = VIH
I/O0R–I/O7R	Right port bidirectional data	8-bit data path; direction controlled by R/WR and OER; isolated from left port I/O drivers
CE0L, CE1L	Left port chip enables	Dual CE allows depth expansion without external logic; either CE0L or CE1L = VIL enables left port
CE0R, CE1R	Right port chip enables	Dual CE enables seamless 16-bit+ bus expansion using MASTER/SLAVE cascading
R/WL, R/WR	Read/write control	Active-low; controls data direction and internal write latch timing; must be stable during tAS/tWP windows
OEL, OER	Output enable	Active-low; gates output drivers; required LOW for read cycles; HIGH places I/O in high-Z state
SEML, SEMR	Semaphore enable	Active-low; selects semaphore register bank (A0–A2) instead of main memory array when asserted
INTL, INTR	Interrupt flags	Push-pull outputs; INTL asserts on right-port write to FFFE_H; INTR asserts on left-port write to FFFF_H
BUSYL, BUSYR	Busy flags	Push-pull outputs (M/S = VIH) or inputs (M/S = VIL); indicate port contention; not tri-state
M/S	Master/Slave select	VIH configures device as master (BUSY outputs); VIL configures as slave (BUSY inputs); determines arbitration role

Key Features

Feature	Design Value
True dual-port architecture	Simultaneous, independent read/write access to same memory location without external arbitration logic
Hardware semaphore engine	Eight dedicated flags accessible via A0–A2; enables deterministic resource locking between processors or cores
Configurable BUSY arbitration	Master/Slave mode (M/S pin) defines whether BUSY signals drive outputs or accept inputs - critical for multi-device systems
Dual CE per port	Eliminates need for external decode logic in depth-expanded configurations (e.g., 128K×8 using two devices)
Low-power standby modes	ISB3 = 1 mW typ. (full CMOS standby); ISB1 = 39 mA typ. (TTL-level standby); supports dynamic power gating
Industrial-grade timing	20 ns access (70V08L20PF) guaranteed over –40°C to +85°C; includes tBDD ≤ 35 ns for port-to-port synchronization

Applications

Real-Time Interprocessor Communication	DSP/FPGA Co-Processing Buffer
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands via shared memory without software polling or OS intervention. IC Role / Device Role / Timing Role: 70V08L20PF acts as a zero-latency, hardware-synchronized mailbox with BUSY-driven arbitration and semaphore-controlled access. Use Value: Eliminates race conditions and reduces inter-core latency to ≤35 ns (tBDD), enabling deterministic response in motor control loops.	Use Scenario: An FPGA streams ADC samples into memory while a DSP reads and processes blocks in parallel, requiring burst-aligned, non-blocking access. IC Role / Device Role / Timing Role: 70V08L20PF serves as a dual-clock domain bridge - FPGA writes on one port, DSP reads on the other, both at full 20 ns speed. Use Value: Sustains 50 MB/s aggregate bandwidth (2 × 8-bit @ 20 ns cycle) with no FIFO overhead or clock domain crossing logic.
Redundant Control System Memory	Legacy Bus Interface Bridge
Use Scenario: Primary and backup controllers maintain mirrored state in shared SRAM; BUSY and INT flags coordinate failover and health monitoring. IC Role / Device Role / Timing Role: 70V08L20PF provides atomic read-modify-write capability via semaphore flags and interrupt-triggered state updates. Use Value: Enables sub-microsecond failover detection (tINR ≤ 20 ns) and prevents inconsistent state writes during switchover.	Use Scenario: A legacy 8-bit microcontroller interfaces with a modern 32-bit host processor through a shared memory buffer, bridging protocol and timing mismatches. IC Role / Device Role / Timing Role: 70V08L20PF absorbs timing skew between disparate buses using fully asynchronous ports and independent CE/R/W timing. Use Value: Removes need for glue logic or custom ASICs; supports mixed-voltage (3.3V) operation with TTL-compatible thresholds.

Real-Time Interprocessor Communication

DSP/FPGA Co-Processing Buffer

Use Scenario: Two microcontrollers exchange sensor fusion data and control commands via shared memory without software polling or OS intervention.

IC Role / Device Role / Timing Role: 70V08L20PF acts as a zero-latency, hardware-synchronized mailbox with BUSY-driven arbitration and semaphore-controlled access.

Use Value: Eliminates race conditions and reduces inter-core latency to ≤35 ns (tBDD), enabling deterministic response in motor control loops.

Use Scenario: An FPGA streams ADC samples into memory while a DSP reads and processes blocks in parallel, requiring burst-aligned, non-blocking access.

IC Role / Device Role / Timing Role: 70V08L20PF serves as a dual-clock domain bridge - FPGA writes on one port, DSP reads on the other, both at full 20 ns speed.

Use Value: Sustains 50 MB/s aggregate bandwidth (2 × 8-bit @ 20 ns cycle) with no FIFO overhead or clock domain crossing logic.

Redundant Control System Memory

Legacy Bus Interface Bridge

Use Scenario: Primary and backup controllers maintain mirrored state in shared SRAM; BUSY and INT flags coordinate failover and health monitoring.

IC Role / Device Role / Timing Role: 70V08L20PF provides atomic read-modify-write capability via semaphore flags and interrupt-triggered state updates.

Use Value: Enables sub-microsecond failover detection (tINR ≤ 20 ns) and prevents inconsistent state writes during switchover.

Use Scenario: A legacy 8-bit microcontroller interfaces with a modern 32-bit host processor through a shared memory buffer, bridging protocol and timing mismatches.

IC Role / Device Role / Timing Role: 70V08L20PF absorbs timing skew between disparate buses using fully asynchronous ports and independent CE/R/W timing.

Use Value: Removes need for glue logic or custom ASICs; supports mixed-voltage (3.3V) operation with TTL-compatible thresholds.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C028V-20AXC	20 ns access, 64K × 16 organization, 3.3 V supply, but requires external arbitration logic for BUSY/semaphore functions	Larger word width simplifies 16-bit bus designs but lacks integrated semaphore and interrupt flags	Select when wider data path is prioritized over hardware synchronization features
AS7C364B-20JCIN	20 ns access, 64K × 8, 3.3 V, but single-port only; no BUSY, SEM, or INT signals; no dual-port arbitration logic	Requires external dual-port controller (e.g., FPGA logic) to emulate contention handling and mailbox behavior	Select only if system already implements arbitration in firmware or programmable logic

Compared with CY7C028V-20AXC and AS7C364B-20JCIN, the 70V08L20PF uniquely integrates port arbitration, semaphore, and interrupt logic on-die - reducing BOM count, PCB area, and firmware complexity in tightly coupled multi-processor systems.

Availability

70V08L20PF is available at Aetrix Electronics and suitable for real-time interprocessor communication, DSP co-processing buffers, and redundant control system memory requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for 70V08L20PF 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, specializes in high-performance timing, memory, and interface ICs for communications, computing, and industrial applications.

The 70V08L20PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor data exchange in mission-critical embedded systems where hardware-enforced synchronization is mandatory.

FAQ

What is the maximum operating temperature range certified for the 70V08L20PF?

The 70V08L20PF is fully specified and tested over the industrial temperature range of –40°C to +85°C. All AC and DC electrical parameters - including 20 ns access time, BUSY arbitration timing (tBDD ≤ 35 ns), and standby current (ISB3 = 1 mW typ.) - are guaranteed across this range. Commercial-grade variants (e.g., 70V08S15) operate from 0°C to +70°C but are not qualified for industrial use.

How does the M/S pin affect BUSY signal behavior in the 70V08L20PF?

In the 70V08L20PF, the M/S pin configures arbitration mode: when M/S = VIH, BUSYL and BUSYR function as push-pull outputs indicating port contention; when M/S = VIL, they become inputs that inhibit writes on the respective port. This dual-role design allows flexible master/slave topology - e.g., one 70V08L20PF as master coordinating multiple slave devices - without external logic.

Can the 70V08L20PF support depth expansion beyond 64K × 8 without external decoding logic?

Yes. The 70V08L20PF supports seamless depth expansion using its dual chip-enable inputs per port (CE0L/CE1L and CE0R/CE1R). For example, two 70V08L20PF devices can be cascaded into a 128K × 8 configuration by connecting address lines A16–A17 to external CE decode logic - eliminating the need for additional gates or CPLDs in standard memory expansion architectures.

What are the exact memory addresses used for interrupt flag generation in the 70V08L20PF?

The 70V08L20PF uses fixed addresses FFFE_H (65534 decimal) and FFFF_H (65535 decimal) for interrupt generation: a write to FFFE_H by the right port asserts INTL, and a write to FFFF_H by the left port asserts INTR. Clearing is asymmetric - INTL is cleared by reading FFFE_H with CEL/OEL = VIL, while INTR is cleared by reading FFFF_H with CER/OER = VIL.

Is the 70V08L20PF pin-compatible with earlier IDT dual-port SRAMs like the 70V08L15PF?

No. While both 70V08L20PF and 70V08L15PF share the same 100-pin TQFP package and pinout, they differ in speed grade and industrial qualification: the 70V08L15PF is commercial-only (0°C to +70°C) with 15 ns access, whereas the 70V08L20PF is industrial-qualified (–40°C to +85°C) with 20 ns access. Electrical compatibility exists, but thermal and timing validation is required for drop-in replacement.

70V08L20PF 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:: 512Kbit

Memory Organization:: 64K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 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)

70V08L20PF FAQ

1.How can I place an order for 70V08L20PF through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V08L20PF 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 70V08L20PF reliable?

The price and inventory of 70V08L20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V08L20PF is usually 5 days.

3.What payment methods are accepted for 70V08L20PF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V08L20PF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V08L20PF?

70V08L20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V08L20PF 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 70V08L20PF?

For technical support, including 70V08L20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V08L20PF requirements.

6.How does Aetrix verify that 70V08L20PF is sourced from the original manufacturer or authorized distributors?

All 70V08L20PF 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 70V08L20PF meets industry standards.

7.What is the process for return or replacement of 70V08L20PF?

All 70V08L20PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V08L20PF, 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 70V08L20PF part is unused and in its original packaging.

Return procedure for 70V08L20PF:

1.Submit a request within 90 days.

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

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