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

Renesas 7027S20PFI8

Name: 7027S20PFI8
Brand: Renesas
SKU: 7027S20PFI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7027S20PFI8

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 7027S20PFI8.pdf

Description:: IC SRAM 512KBIT PARALLEL 100TQFP

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Product details

Overview

7027S20PFI8 from IDT (Integrated Device Technology) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address, 20 ns maximum access time (industrial grade), TTL-compatible 5 V ±10% supply, and on-chip port arbitration logic. It serves as a stand-alone 512 Kbit dual-port SRAM or master/slave pair in 32-bit+ bus systems for real-time interprocessor communication.

For engineers reviewing the 7027S20PFI8 datasheet, 7027S20PFI8 pinout, 7027S20PFI8 application, or 7027S20PFI8 equivalent, key selection criteria include BUSY/INT flag timing, semaphore signaling support, byte-selectable I/O control, and industrial temperature operation (–40°C to +85°C) in TQFP packaging.

Technical Context

The 7027S20PFI8 implements fully asynchronous dual-port architecture with independent left/right address, control, and 16-bit bidirectional I/O buses. Its on-chip arbitration logic resolves contention via address-match or chip-enable-based BUSY assertion, with M/S pin configuring master (BUSY output) or slave (BUSY input) behavior.

It supports semaphore flag management across eight dedicated locations (A0–A2), accessed via CE = VIH/SEM = VIL, and interrupt signaling using fixed mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR), both implemented in standard SRAM array space without dedicated registers.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 16 (512 Kbit), fully random-access dual-port SRAM
Access Time (max)	20 ns - guarantees worst-case read latency under industrial conditions (–40°C to +85°C)
Supply Voltage	5.0 V ±10% - single TTL-compatible rail, no auxiliary supplies required
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating
Power (Active, typ)	750 mW - enables high-throughput operation without forced cooling in dense layouts
Power (Standby, typ)	5 mW - low quiescent draw during port disable (CE0/CE1 = VIH)
Package	100-pin TQFP (14 mm × 14 mm × 1.4 mm) - surface-mount, RoHS-compliant, green option available

Pinout & Package

7027S20PFI8 is packaged 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; package includes dedicated power/ground pairs for noise isolation.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A14L / A0R–A14R	Address inputs (left/right)	Two independent 15-bit address buses enable concurrent access to any location
I/O0L–I/O15L / I/O0R–I/O15R	Bidirectional data (left/right)	Separate 16-bit I/O paths eliminate bus contention; UBL/LBL allow byte-level writes
CE0L, CE1L / CE0R, CE1R	Chip enables (left/right)	Dual CE per port enables independent power-down and depth expansion without external logic
R/WL, R/WR	Read/write control (left/right)	Asynchronous write strobes; no clock required - simplifies timing-critical designs
OEL, OER	Output enables (left/right)	Independent tri-state control per port supports mixed read/write concurrency
SEML, SEMR	Semaphore enable (left/right)	Activates semaphore register access (A0–A2) when CE = VIH, enabling inter-processor coordination
BUSYL, BUSYR	Busy flags (left/right)	Push-pull outputs (master) or inputs (slave); resolve address/contention conflicts without software polling
INTL, INTR	Interrupt flags (left/right)	Open-collector compatible outputs signal mailbox writes (7FFE_H/7FFF_H) for event-driven synchronization
M/S	Master/Slave select	Configures BUSY as output (VIH) or input (VIL); determines arbitration role in cascaded systems
VCC, GND	Power/ground	Multiple distributed VCC/GND pins reduce IR drop and improve signal integrity at high speed

Key Features

Feature	Design Value
True dual-port memory cells	Enables simultaneous, independent read/write to identical addresses - eliminates arbitration wait states in real-time systems
On-chip hardware semaphore logic	Eight dedicated flags (A0–A2) managed via standard I/O pins - no firmware overhead for resource locking
Master/Slave cascade capability	Single M/S pin configures device as master (BUSY output) or slave (BUSY input) - enables seamless 32-bit+ bus expansion
Separate upper/lower byte control	UBL/LBL pins permit 8-bit writes without disturbing adjacent bytes - critical for mixed-width peripheral interfacing
Full asynchronous operation	No clock required; timing defined solely by tRC, tAA, tWC - simplifies integration with diverse host controllers

Applications

Real-Time Interprocessor Communication	Digital Signal Processing Buffering
Use Scenario: Two microcontrollers exchange sensor data and control commands in a motor control system with deterministic latency. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared mailbox with BUSY-flag arbitration ensuring conflict-free writes and INT-driven notification. Use Value: Eliminates software polling and reduces inter-core latency to ≤20 ns, meeting hard real-time deadlines.	Use Scenario: DSP and ARM processor share audio sample buffers in a voice recognition module. IC Role / Device Role / Timing Role: 7027S20PFI8 provides zero-wait-state, byte-selectable access to 512 Kbit of shared memory for ping-pong buffering. Use Value: Enables full-duplex streaming at 48 kHz/16-bit without DMA stalls or CPU intervention.
Industrial PLC Memory Expansion	Avionics Data Acquisition Interface
Use Scenario: Programmable logic controller adds deterministic I/O mapping memory between FPGA and ARM core. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) dual-port RAM serves as configuration and status exchange buffer with semaphore-controlled access. Use Value: Guarantees reliable operation in uncontrolled cabinet environments while supporting hot-swap-safe firmware updates.	Use Scenario: Flight data recorder interfaces multiple sensor ADCs and a safety-critical microcontroller. IC Role / Device Role / Timing Role: 7027S20PFI8 operates as fault-tolerant shared memory with BUSY arbitration preventing corrupted writes during transient events. Use Value: Meets DO-254 timing constraints with 20 ns access and failsafe semaphore signaling for certified systems.

Real-Time Interprocessor Communication

Digital Signal Processing Buffering

Use Scenario: Two microcontrollers exchange sensor data and control commands in a motor control system with deterministic latency.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared mailbox with BUSY-flag arbitration ensuring conflict-free writes and INT-driven notification.

Use Value: Eliminates software polling and reduces inter-core latency to ≤20 ns, meeting hard real-time deadlines.

Use Scenario: DSP and ARM processor share audio sample buffers in a voice recognition module.

IC Role / Device Role / Timing Role: 7027S20PFI8 provides zero-wait-state, byte-selectable access to 512 Kbit of shared memory for ping-pong buffering.

Use Value: Enables full-duplex streaming at 48 kHz/16-bit without DMA stalls or CPU intervention.

Industrial PLC Memory Expansion

Avionics Data Acquisition Interface

Use Scenario: Programmable logic controller adds deterministic I/O mapping memory between FPGA and ARM core.

IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) dual-port RAM serves as configuration and status exchange buffer with semaphore-controlled access.

Use Value: Guarantees reliable operation in uncontrolled cabinet environments while supporting hot-swap-safe firmware updates.

Use Scenario: Flight data recorder interfaces multiple sensor ADCs and a safety-critical microcontroller.

IC Role / Device Role / Timing Role: 7027S20PFI8 operates as fault-tolerant shared memory with BUSY arbitration preventing corrupted writes during transient events.

Use Value: Meets DO-254 timing constraints with 20 ns access and failsafe semaphore signaling for certified systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C028V-20AXC	20 ns access, 32K × 16, but uses 3.3 V supply and has different BUSY polarity (active-low vs. active-high push-pull)	Requires level-shifting for 5 V systems; interrupt timing differs (tINR = 35 ns vs. 20 ns)	Select only if migrating to 3.3 V architecture and redesigning support circuitry.
IDT70V27L20PF	Same pinout and function, but L-version (1 mW standby) and commercial temp range (0°C to +70°C)	Lacks industrial temperature qualification; not suitable for extended ambient or automotive under-hood use	Acceptable for cost-sensitive commercial designs where thermal margin is sufficient.

Compared with CY7C028V-20AXC and IDT70V27L20PF, the 7027S20PFI8 uniquely delivers industrial temperature operation, 5 V compatibility, and push-pull BUSY/INT outputs in a drop-in TQFP package - making it optimal for legacy 5 V embedded systems requiring guaranteed reliability.

Availability

7027S20PFI8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing buffering, and industrial PLC memory expansion requiring stable component supply across long production lifecycles.

Supply support for 7027S20PFI8 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The IDT7027 family was designed specifically for deterministic, low-latency interprocessor communication in industrial, aerospace, and telecom infrastructure - emphasizing hardware arbitration, semaphore support, and industrial temperature resilience.

FAQ

What is the operating temperature range specified for the 7027S20PFI8?

The 7027S20PFI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "Recommended DC Operating Conditions" table (Table 6) and applies across all electrical parameters including access time (20 ns max), power consumption, and BUSY/INT timing. The device maintains full functionality without derating across this range.

Does the 7027S20PFI8 support true simultaneous access to the same memory location from both ports?

Yes, the 7027S20PFI8 features true dual-ported memory cells that allow simultaneous read/write access to the same address. When contention occurs, on-chip arbitration asserts BUSY to block the later-arriving write, preserving data integrity. This behavior is documented in the Functional Block Diagram and Truth Table V (Address Bus Arbitration).

How is semaphore functionality implemented in the 7027S20PFI8?

The 7027S20PFI8 implements eight hardware semaphore flags addressed by A0–A2. Access requires CE = VIH and SEM = VIL (per Truth Table III). Writing I/O0 sets the flag; reading returns the value across all 16 I/O lines. No external logic or firmware is needed - the semaphore state is stored directly in dedicated SRAM locations.

What is the role of the M/S pin on the 7027S20PFI8?

The M/S pin configures the 7027S20PFI8 as master (M/S = VIH) or slave (M/S = VIL). In master mode, BUSYL/BUSYR are push-pull outputs signaling contention; in slave mode, they become inputs that inhibit writes when asserted. This enables automatic depth expansion in multi-device systems without external arbitration logic.

Can the 7027S20PFI8 be used in a 3.3 V system?

No, the 7027S20PFI8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V) and is TTL-compatible. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive levels (VOH = 2.4 V min, VOL = 0.4 V max) are specified only for 5 V operation. Using it with 3.3 V violates Absolute Maximum Ratings and invalidates all AC/DC specifications.

7027S20PFI8 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, Asynchronous

Memory Size:: 512Kbit

Memory Organization:: 32K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 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)

7027S20PFI8 FAQ

1.How can I place an order for 7027S20PFI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 7027S20PFI8 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 7027S20PFI8 reliable?

The price and inventory of 7027S20PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7027S20PFI8 is usually 5 days.

3.What payment methods are accepted for 7027S20PFI8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7027S20PFI8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7027S20PFI8?

7027S20PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7027S20PFI8 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 7027S20PFI8?

For technical support, including 7027S20PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7027S20PFI8 requirements.

6.How does Aetrix verify that 7027S20PFI8 is sourced from the original manufacturer or authorized distributors?

All 7027S20PFI8 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 7027S20PFI8 meets industry standards.

7.What is the process for return or replacement of 7027S20PFI8?

All 7027S20PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7027S20PFI8, 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 7027S20PFI8 part is unused and in its original packaging.

Return procedure for 7027S20PFI8:

1.Submit a request within 90 days.

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

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