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Renesas 7027L55PFI8
- Part No.:
- 7027L55PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7027L55PFI8.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
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Product details
Overview
7027L55PFI8 from IDT is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 55 ns max access time (commercial grade), 1 mW typical standby power, and full on-chip semaphore and BUSY arbitration logic. It serves as a master/slave-configurable memory buffer in real-time embedded systems requiring deterministic inter-processor communication.
For engineers reviewing the 7027L55PFI8 datasheet, 7027L55PFI8 pinout, 7027L55PFI8 application, or 7027L55PFI8 equivalent, key selection considerations include its 100-pin TQFP package, industrial temperature range (–40°C to +85°C), dual 16-bit independent I/O ports, M/S-selectable master/slave mode, and hardware semaphore support for lock-free synchronization.
Technical Context
The 7027L55PFI8 implements fully asynchronous dual-port operation with separate address, control, and data buses per port-enabling concurrent read/write cycles without external arbitration logic. Its on-chip arbitration uses address-match detection and CE timing to assert BUSY flags, while semaphore registers (A0–A2 addressed) provide eight hardware-mapped mutual exclusion flags accessible via dedicated SEM pins.
It supports depth expansion via dual chip enables (CE0/CE1) and data bus widening to 32+ bits using Master/Slave cascading: M/S = VIH configures BUSY as output (master), M/S = VIL configures BUSY as input (slave). All I/Os are TTL-compatible with single 5V ±10% supply and push-pull BUSY/INT outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 16 (512 Kbit), two independent 16-bit ports |
| Access Time (max) | 55 ns - guarantees worst-case read latency under commercial conditions |
| Supply Voltage | 5.0 V ±10% - operates directly from standard TTL logic rails |
| Standby Current (typ) | 1 mW - enables ultra-low-power idle states in battery-backed or energy-sensitive systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade reliability |
| Package | 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm body |
| Arbitration Logic | On-chip hardware BUSY and semaphore signaling - eliminates need for external glue logic |
Pinout & Package
7027L55PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. All VCC and GND pins must be connected per datasheet layout guidelines.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L / A0R–A14R | Address Inputs (Left/Right) | 15-bit independent address buses per port; enable full 32K addressing without multiplexing |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data (Left/Right) | 16-bit parallel data paths; UBL/LBL and UBR/LBR allow byte-level write masking |
| 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 | Active-low write enable per port; supports asynchronous read/write interleaving |
| OEL, OER | Output Enable | Controls tristate of I/O drivers; allows shared bus usage with other devices |
| SEML, SEMR | Semaphore Enable | Activates hardware semaphore register access (A0–A2) when CE = VIH and SEM = VIL |
| BUSYL, BUSYR | Busy Flag (I/O) | Push-pull outputs (master) or inputs (slave); signal port contention during address match or write overlap |
| M/S | Master/Slave Select | Configures device role: VIH = BUSY output (master), VIL = BUSY input (slave) for cascaded arbitration |
| INTL, INTR | Interrupt Flags | Open-collector compatible (per datasheet note 2), asserted when opposite port writes to mailbox addresses 7FFE/7FFF |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Ported Memory Cells | Enables simultaneous read/write to identical memory locations across ports-critical for real-time inter-processor messaging without software locks |
| Hardware Semaphore Support | Eight dedicated, addressable (A0–A2) semaphore flags accessed via SEM pins-eliminates need for polling or software mutexes |
| Automatic Power-Down | Per-port standby via CE0/CE1 control reduces active current to 1 mW typ-ideal for low-duty-cycle embedded controllers |
| Master/Slave Cascading | M/S pin configures BUSY direction, enabling seamless 32-bit+ data bus expansion with no external logic or timing skew |
| Full On-Chip Arbitration | Address-match and CE-timing-based BUSY assertion prevents data corruption during concurrent access-no external arbitration IC required |
Applications
| Industrial Motion Controller | Avionics Data Concentrator |
|---|---|
Use Scenario: Two independent DSPs exchange position setpoints and feedback data in real time within a servo loop. IC Role / Device Role / Timing Role: Dual-port SRAM acts as a zero-latency shared memory buffer with hardware semaphore coordination between motion and safety processors. Use Value: 55 ns access ensures sub-100 µs round-trip message latency; on-chip BUSY arbitration prevents race conditions during simultaneous updates to shared control registers. |
Use Scenario: Multiple LRUs (Line Replaceable Units) write sensor telemetry to a central flight management system via time-triggered bus cycles. IC Role / Device Role / Timing Role: 7027L55PFI8 serves as a deterministic mailbox memory where each LRU has dedicated port access and semaphore-controlled write priority. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability in avionics bays; 1 mW standby power minimizes heat load in sealed enclosures. |
| Medical Imaging Subsystem | Programmable Logic Controller (PLC) |
Use Scenario: FPGA-accelerated image reconstruction engine reads raw detector data while host CPU writes configuration parameters. IC Role / Device Role / Timing Role: Dual-port RAM provides non-blocking, asynchronous access path between high-speed imaging pipeline and supervisory processor. Use Value: True dual-port architecture avoids FIFO bottlenecks; 100-pin TQFP fits compact PCB layouts common in medical modules. |
Use Scenario: PLC main CPU and I/O scan engine require synchronized access to process variable tables without interrupt latency penalties. IC Role / Device Role / Timing Role: 7027L55PFI8 functions as a shared memory hub with INTL/INTR flags signaling data readiness between scan cycle and control execution phases. Use Value: Hardware interrupt mailbox (7FFE/7FFF) replaces software polling, reducing CPU overhead by >90% in cyclic scan architectures. |
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-55AXC | 55 ns access, 32K × 16, but requires external arbitration logic; no integrated semaphore or M/S cascade support | Lacks hardware semaphore and master/slave BUSY signaling-requires additional logic for multi-processor sync | Choose only if existing design already implements external arbitration and does not require mailbox or semaphore features |
| IDT70V27L25PFI | 25 ns access, same 32K × 16 organization, but rated for commercial temp only (0°C to +70°C) | Higher speed but unsuitable for industrial environments requiring –40°C operation | Select when system ambient stays within commercial range and sub-25 ns latency is mandatory for timing-critical pipelines |
Compared with CY7C028V-55AXC and IDT70V27L25PFI, the 7027L55PFI8 uniquely delivers industrial temperature operation, integrated semaphore, and M/S-configurable arbitration in a single 100-pin TQFP-reducing BOM count and PCB area versus discrete solutions.
Availability
7027L55PFI8 is available at Aetrix Electronics and suitable for industrial motion control, avionics data concentrators, and medical imaging subsystems requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.
Supply support for 7027L55PFI8 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 for communications, computing, and industrial markets.
The IDT7027 family was designed specifically for deterministic inter-processor communication in real-time embedded systems-delivering hardware-synchronized dual-port memory with minimal external components.
FAQ
What is the operating temperature range for the 7027L55PFI8?
The 7027L55PFI8 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) of the official IDT datasheet DSC3199/12, and applies to all speed grades of the IDT7027L series including the 55 ns variant.
Does the 7027L55PFI8 support true simultaneous read/write to the same memory location?
Yes, the 7027L55PFI8 implements true dual-ported memory cells that permit simultaneous access-including concurrent read and write-to the exact same address location across left and right ports. This capability is explicitly stated in the "Features" section and verified in the functional block diagram and arbitration description of the IDT7027 datasheet.
How does the M/S pin affect BUSY signal behavior on the 7027L55PFI8?
When M/S = VIH, the 7027L55PFI8 operates as a master: BUSYL and BUSYR are push-pull outputs asserting contention status. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This behavior is defined in Note 1 of the Functional Block Diagram and Truth Table I.
What is the standby power consumption of the 7027L55PFI8?
The 7027L55PFI8 consumes 1 mW typical standby power (ISB3, both ports fully deselected with CMOS-level inputs), as specified in Table 10a of the IDT datasheet. This value is distinct from the higher ISB1/ISB2 currents seen under TTL-level standby conditions.
Can the 7027L55PFI8 be used without external arbitration logic?
Yes-the 7027L55PFI8 includes full on-chip arbitration logic with automatic BUSY flag generation based on address matching and CE timing. The datasheet confirms this eliminates the need for external arbitration ICs in master/slave or peer-to-peer dual-processor configurations.
7027L55PFI8 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:
- 55ns
- Access Time:
- 55 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)
7027L55PFI8 FAQ
1.How can I place an order for 7027L55PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7027L55PFI8 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 7027L55PFI8 reliable?
The price and inventory of 7027L55PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7027L55PFI8 is usually 5 days.
3.What payment methods are accepted for 7027L55PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7027L55PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7027L55PFI8?
7027L55PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7027L55PFI8 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 7027L55PFI8?
For technical support, including 7027L55PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7027L55PFI8 requirements.
6.How does Aetrix verify that 7027L55PFI8 is sourced from the original manufacturer or authorized distributors?
All 7027L55PFI8 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 7027L55PFI8 meets industry standards.
7.What is the process for return or replacement of 7027L55PFI8?
All 7027L55PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7027L55PFI8, 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 7027L55PFI8 part is unused and in its original packaging.
Return procedure for 7027L55PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7027L55PFI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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