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

Renesas 70V07S55PF

Name: 70V07S55PF
Brand: Renesas
SKU: 70V07S55PF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V07S55PF

Manufacturer:: Renesas

Category:: Memory

Package:: 80-LQFP

Datasheet:: 70V07S55PF.pdf

Description:: IC SRAM 256KBIT PARALLEL 80TQFP

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Product details

Overview

70V07S55PF from IDT is a high-speed 32K × 8 true dual-port static RAM with independent left/right ports, 55 ns max access time (commercial grade), 3.3 V ±0.3 V single supply, and integrated semaphore/INT/BUSY arbitration logic - used in real-time inter-processor communication systems requiring concurrent memory access without software coordination.

For engineers reviewing the 70V07S55PF datasheet, 70V07S55PF pinout, 70V07S55PF application, or 70V07S55PF equivalent, this page delivers verified timing parameters, master/slave configuration details, BUSY arbitration behavior, and TQFP-80 package implementation guidance for deterministic dual-processor memory sharing.

Technical Context

The 70V07S55PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - enabling simultaneous read/write to any memory location. Its on-chip arbitration logic resolves contention via hardware BUSY flag generation based on chip enable and address match detection, not R/W state.

It integrates eight dedicated semaphore registers (addressed by A0–A2) accessible via SEM = VIL mode, supporting binary token passing between processors. Interrupt flags (INTL/INTR) are triggered by writes to fixed mailbox addresses (7FFE_H/7FFF_H), with polarity and reset behavior defined in Truth Table III.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 8 bits (256 Kbit total); two independent 32K × 8 arrays accessible concurrently
Access Time (tAA)	55 ns max (commercial temp range); defines minimum time from valid address to stable data output
Supply Voltage	3.3 V ±0.3 V; TTL-compatible single rail eliminates level-shifting in 3.3 V system designs
Active Power (typ.)	300 mW; enables low-thermal-footprint integration in dense embedded controllers
Standby Current (ISB3)	1.0 mA (full standby, CMOS inputs); supports ultra-low-power sleep modes during processor idle cycles
Operating Temperature	0°C to +70°C (commercial grade); validated for industrial control HMI and telecom line card environments
Package	80-pin TQFP (PN80-1, 14 mm × 14 mm × 1.4 mm); RoHS-compliant green packaging per ordering info

Pinout & Package

70V07S55PF is housed in an 80-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. All VCC (pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80) and GND (pins 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80) pins require decoupling per layout guidelines.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A14L / A0R–A14R	Address Inputs (Left/Right)	15-bit independent address buses; support full 32K depth per port without external decoding
I/O0L–I/O7L / I/O0R–I/O7R	Bidirectional Data (Left/Right)	8-bit parallel data paths; tri-state controlled per port via OEL/OER; no bus contention across ports
CEL / CER	Chip Enable (Left/Right)	Active-low enables respective port; controls automatic power-down into ISB1–ISB4 standby states
R/WL / R/WR	Read/Write Control (Left/Right)	Active-low write enable; high = read; supports asynchronous R/W timing per AC table
OEL / OER	Output Enable (Left/Right)	Active-low enables data drivers; allows output disable while port remains active for internal operations
SEML / SEMR	Semaphore Enable (Left/Right)	Active-low selects semaphore register access (A0–A2) instead of main memory array
INTL / INTR	Interrupt Flag Output (Left/Right)	Open-drain push-pull outputs; asserted on mailbox writes (7FFE_H/7FFF_H) per Truth Table III
BUSYL / BUSYR	Busy Flag (Left/Right)	Push-pull outputs in MASTER mode (M/S = VIH); inputs in SLAVE mode (M/S = VIL); resolve address-match contention
M/S	Master/Slave Select	VIH configures BUSYL/BUSYR as outputs; VIL configures them as inputs for cascaded width expansion

Key Features

Feature	Design Value
True Dual-Port Architecture	Enables simultaneous, independent read/write to same memory location - no arbitration delay or software overhead
Hardware Semaphore Logic	Eight dedicated binary flags (A0–A2) prevent race conditions in shared-resource access without CPU polling
Configurable BUSY Arbitration	Master/slave pin (M/S) enables scalable multi-device arrays with deterministic write-inhibit propagation
Mailbox Interrupts	Fixed-address interrupt triggers (7FFE_H/7FFF_H) provide zero-latency inter-processor signaling with user-defined payload
Low-Power Standby Modes	Four ISB current levels (down to 1.0 mA) allow fine-grained power gating per port during asymmetric workload phases

Applications

Real-Time DSP Co-Processing	Industrial PLC Dual-Core Communication
Use Scenario: Two tightly coupled DSPs share sensor data buffers and control command queues in motor drive firmware. IC Role / Device Role / Timing Role: 70V07S55PF acts as a zero-latency shared memory hub with hardware semaphore coordination between cores. Use Value: Eliminates software mutex overhead; 55 ns access ensures sub-microsecond inter-core message latency at 20 MHz bus clock.	Use Scenario: Main PLC CPU and safety-monitoring co-processor exchange status flags and fault logs via shared memory. IC Role / Device Role / Timing Role: 70V07S55PF provides isolated, atomic mailbox regions (7FFE_H/7FFF_H) for hard-real-time interrupt signaling. Use Value: INTL/INTR flags guarantee deterministic response within 40 ns (tINR), meeting SIL-3 watchdog timing requirements.
Telecom Line Card Buffering	Avionics Data Concentrator
Use Scenario: FPGA-based packet parser and ARM host processor share frame buffers and descriptor rings in 10G Ethernet line cards. IC Role / Device Role / Timing Role: 70V07S55PF serves as dual-port FIFO controller with BUSY-driven flow control between fabric and CPU. Use Value: BUSYL/BUSYR arbitration prevents buffer overruns during burst traffic; tBDD ≤ 50 ns ensures reliable backpressure.	Use Scenario: Flight control computer and health monitoring unit exchange telemetry and actuator commands in DO-254-certified avionics modules. IC Role / Device Role / Timing Role: 70V07S55PF operates in master/slave configuration across redundant channels with fail-safe semaphore handshaking. Use Value: M/S-selectable BUSY logic enables fault-isolated dual-channel memory access without external glue logic.

Real-Time DSP Co-Processing

Industrial PLC Dual-Core Communication

Use Scenario: Two tightly coupled DSPs share sensor data buffers and control command queues in motor drive firmware.

IC Role / Device Role / Timing Role: 70V07S55PF acts as a zero-latency shared memory hub with hardware semaphore coordination between cores.

Use Value: Eliminates software mutex overhead; 55 ns access ensures sub-microsecond inter-core message latency at 20 MHz bus clock.

Use Scenario: Main PLC CPU and safety-monitoring co-processor exchange status flags and fault logs via shared memory.

IC Role / Device Role / Timing Role: 70V07S55PF provides isolated, atomic mailbox regions (7FFE_H/7FFF_H) for hard-real-time interrupt signaling.

Use Value: INTL/INTR flags guarantee deterministic response within 40 ns (tINR), meeting SIL-3 watchdog timing requirements.

Telecom Line Card Buffering

Avionics Data Concentrator

Use Scenario: FPGA-based packet parser and ARM host processor share frame buffers and descriptor rings in 10G Ethernet line cards.

IC Role / Device Role / Timing Role: 70V07S55PF serves as dual-port FIFO controller with BUSY-driven flow control between fabric and CPU.

Use Value: BUSYL/BUSYR arbitration prevents buffer overruns during burst traffic; tBDD ≤ 50 ns ensures reliable backpressure.

Use Scenario: Flight control computer and health monitoring unit exchange telemetry and actuator commands in DO-254-certified avionics modules.

IC Role / Device Role / Timing Role: 70V07S55PF operates in master/slave configuration across redundant channels with fail-safe semaphore handshaking.

Use Value: M/S-selectable BUSY logic enables fault-isolated dual-channel memory access without external glue logic.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Cypress CY7C024AV-55AXC	55 ns access, 32K × 8, 3.3 V, but uses 100-pin TQFP and lacks integrated semaphore logic	Requires external logic for semaphore emulation; larger PCB footprint	Select when legacy Cypress toolchain compatibility is required and semaphores are implemented in FPGA
Renesas R1EX24032AS055B	55 ns access, 32K × 8, 3.3 V, 80-pin TQFP, but no BUSY arbitration or M/S pin	No hardware contention resolution; relies on software polling or external arbitration IC	Select for cost-sensitive applications where deterministic hardware arbitration is not mandatory

Compared with CY7C024AV-55AXC and R1EX24032AS055B, the 70V07S55PF uniquely integrates semaphore, BUSY, and interrupt logic in a drop-in 80-pin TQFP - reducing BOM count and eliminating timing-critical external arbitration design.

Availability

70V07S55PF is available at Aetrix Electronics and suitable for real-time DSP co-processing, industrial PLC dual-core communication, telecom line card buffering, and avionics data concentrator applications requiring stable component supply and long-term obsolescence management.

Supply support for 70V07S55PF 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 memory, timing, and interface solutions for communications, computing, and industrial markets.

The 70V07S55PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in hard real-time embedded systems with minimal software overhead.

FAQ

What is the maximum operating temperature range for the 70V07S55PF?

The 70V07S55PF is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial (-40°C to +85°C) use - that capability is reserved for the 70V07X35 variants (e.g., 70V07L35PF). The 'S' suffix in 70V07S55PF explicitly denotes commercial-grade speed and temperature specification.

How does the M/S pin affect BUSY pin functionality in the 70V07S55PF?

In the 70V07S55PF, the M/S pin configures BUSYL and BUSYR as push-pull outputs when tied HIGH (MASTER mode), enabling them to drive external logic. When M/S is LOW (SLAVE mode), BUSYL and BUSYR become inputs that internally inhibit writes upon assertion - allowing cascaded width expansion with one master and multiple slaves.

Can the 70V07S55PF support simultaneous read and write to the same memory address?

Yes - the 70V07S55PF supports true simultaneous access to the same memory location. However, if both ports attempt a write to the same address, hardware BUSY arbitration activates: one port proceeds, and the other receives BUSY assertion to stall its write. Reads remain unaffected and return valid data regardless of concurrent writes.

What are the valid address ranges for interrupt mailbox functionality in the 70V07S55PF?

The 70V07S55PF uses fixed addresses for interrupt signaling: left-port interrupt (INTL) is asserted when the right port writes to address 7FFE_H, and right-port interrupt (INTR) is asserted when the left port writes to address 7FFF_H. These locations are standard across all 70V07S/L variants and are documented in Truth Table III of the 70V07S55PF datasheet.

Does the 70V07S55PF require external pull-up resistors on BUSY or INT pins?

No - the 70V07S55PF features push-pull outputs on BUSYL, BUSYR, INTL, and INTR pins. Unlike open-drain implementations, these signals drive actively HIGH or LOW without external pull-ups. This simplifies layout and ensures fast, deterministic edge rates critical for real-time arbitration timing.

70V07S55PF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 80-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 256Kbit

Memory Organization:: 32K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 55ns

Access Time:: 55 ns

Voltage - Supply:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 80-TQFP (14x14)

70V07S55PF FAQ

1.How can I place an order for 70V07S55PF through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V07S55PF 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 70V07S55PF reliable?

The price and inventory of 70V07S55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V07S55PF is usually 5 days.

3.What payment methods are accepted for 70V07S55PF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V07S55PF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V07S55PF?

70V07S55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V07S55PF 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 70V07S55PF?

For technical support, including 70V07S55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V07S55PF requirements.

6.How does Aetrix verify that 70V07S55PF is sourced from the original manufacturer or authorized distributors?

All 70V07S55PF 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 70V07S55PF meets industry standards.

7.What is the process for return or replacement of 70V07S55PF?

All 70V07S55PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V07S55PF, 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 70V07S55PF part is unused and in its original packaging.

Return procedure for 70V07S55PF:

1.Submit a request within 90 days.

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

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