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Renesas 7027L55PF/S2909
- Part No.:
- 7027L55PF/S2909
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7027L55PF/S2909.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,284
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Product details
Overview
IDT7027L55PF/S2909 from IDT (now Renesas) 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, 55 ns maximum access time, 1 mW typical standby power, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It serves as a stand-alone or master/slave-configured memory in real-time embedded systems requiring deterministic inter-processor communication.
For engineers reviewing the IDT7027L55PF/S2909 datasheet, IDT7027L55PF/S2909 pinout, IDT7027L55PF/S2909 application, or IDT7027L55PF/S2909 equivalent, key selection criteria include bus-matching byte controls (UBL/LBL), on-chip semaphore arbitration, BUSY flag timing for port contention resolution, and TQFP-100 packaging compatibility with legacy 7027-family layouts.
Technical Context
The IDT7027L55PF/S2909 implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port conflicts via address-match or chip-enable-triggered BUSY assertion, supporting both master (BUSY output) and slave (BUSY input) configurations through the M/S pin.
It integrates full hardware semaphore signaling across eight flags addressed by A0–A2, with dedicated SEM pins and non-tri-state totem-pole INT/BUSY outputs. The device supports depth expansion via dual CE enables and data bus widening to 32+ bits using master/slave cascading with BUSY/INT handshaking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 16-bit (512 Kbit), two independent ports with separate address/control/I/O |
| Access Time (max) | 55 ns - guarantees worst-case read latency under commercial conditions; valid for both ports simultaneously |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no auxiliary supplies required |
| Standby Power (typ) | 1 mW - achieved when both CE0/CE1 = VIH; enables ultra-low-power idle states in battery-backed systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Package | 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm × 1.4 mm body - surface-mount compatible with standard reflow profiles |
| I/O Interface | TTL-level compatible - direct interfacing with 5 V microcontrollers, FPGAs, and ASICs without level shifters |
Pinout & Package
Package: 100-pin TQFP (Pb-free, RoHS-compliant), body size 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be connected per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L / A0R–A14R | Left/Right Address Inputs | Independent 15-bit address buses for concurrent access to same or different memory locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Left/Right Data I/O | Bidirectional 16-bit data paths; upper/lower byte control via UBL/LBL enables 8-bit bus matching |
| R/WL / R/WR | Left/Right Write Enable | Active-low write strobes; enable simultaneous writes only when arbitration permits (no BUSY conflict) |
| OEL / OER | Left/Right Output Enable | Control output drivers independently; allows one port to read while other writes (if addresses differ) |
| CE0L, CE1L / CE0R, CE1R | Left/Right Chip Enables | Dual CE per port enables depth expansion without external logic; CE1 used with CE0 for power-down sequencing |
| SEML / SEMR | Semaphore Enable | Activates 8-flag semaphore register bank; accessed when CE = VIH and SEM = VIL per truth table |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enable byte-wise writes to 16-bit bus; critical for mixed-width processor interfacing (e.g., 8-bit peripherals) |
| INTL / INTR | Interrupt Flags | Open-collector-equivalent push-pull outputs; assert on mailbox writes (7FFE/7FFF) for inter-processor signaling |
| BUSYL / BUSYR | Busy Flags | Push-pull outputs (Master) or inputs (Slave); resolve contention via address match or CE timing per M/S state |
| M/S | Master/Slave Select | Configures BUSY behavior: VIH = BUSY output (Master), VIL = BUSY input (Slave) for daisy-chained systems |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables deterministic, lock-free inter-processor communication without software overhead or external arbitration logic |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2 reduce CPU polling and eliminate race conditions in shared-resource access |
| Master/Slave Cascading Support | Allows 32-bit+ data bus expansion using BUSY/INT handshake; eliminates need for discrete glue logic in wide-memory systems |
| Byte-Controlled I/O | Separate UBL/LBL enables partial-word writes - essential for legacy 8-bit peripherals coexisting with 16-bit processors |
| Low-Power Standby Mode | 1 mW typical standby current per port extends battery life in portable industrial controllers and remote sensors |
Applications
| Real-Time Industrial PLC | Dual-Core DSP Communication |
|---|---|
Use Scenario: Two independent PLC scan cycles (input sampling and output update) execute concurrently on separate CPUs sharing I/O status tables. IC Role / Device Role / Timing Role: IDT7027L55PF/S2909 acts as deterministic shared memory with hardware arbitration, ensuring atomic updates to process variables without software locks. Use Value: Eliminates scan-cycle jitter caused by software mutexes; 55 ns access enables sub-millisecond I/O response in safety-critical motion control. | Use Scenario: A dual-core DSP system uses one core for signal acquisition and another for real-time FFT processing, exchanging time-stamped buffers. IC Role / Device Role / Timing Role: IDT7027L55PF/S2909 provides zero-latency, conflict-free memory access between cores via BUSY-flag handshaking and semaphore-controlled buffer pointers. Use Value: Sustains 20 MB/s sustained throughput across both ports; 1 mW standby power reduces thermal load in compact DSP modules. |
| Avionics Flight Control Unit | Medical Imaging Data Buffer |
Use Scenario: Redundant flight computers exchange sensor fusion results and actuator commands via shared memory with fault-detection cross-checking. IC Role / Device Role / Timing Role: IDT7027L55PF/S2909 serves as ARINC-653-compliant partitioned memory with hardware-enforced access isolation via CE0/CE1 gating. Use Value: –40°C to +85°C rating ensures reliability at altitude; 55 ns access meets DO-254 deterministic timing budgets for servo loop closure. | Use Scenario: MRI scanner front-end digitizes RF signals at 100 MSPS and streams to host PC; intermediate buffering prevents data loss during PCIe transfer gaps. IC Role / Device Role / Timing Role: IDT7027L55PF/S2909 operates as ping-pong buffer with left port capturing ADC data and right port streaming to DMA controller. Use Value: True dual-port architecture avoids FIFO overflow during host bus arbitration delays; TQFP-100 footprint matches legacy medical board layouts. |
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 CY7C028V-55AXC | 55 ns access, 32K × 16, but requires 3.3 V supply and has no native M/S cascade mode | Lacks integrated BUSY arbitration; external logic needed for master/slave chaining | Select when migrating to 3.3 V systems and external arbitration is acceptable |
| Renesas 70V27L55PF | Same pinout and function, but manufactured post-IDT acquisition; identical AC/DC specs and timing | No functional difference; qualifies as drop-in replacement with updated traceability | Preferred for new designs requiring long-term supply assurance and Renesas support |
Compared with CY7C028V-55AXC, IDT7027L55PF/S2909 delivers native 5 V operation and hardware BUSY arbitration, reducing BOM count; versus 70V27L55PF, it shares identical performance but reflects original IDT branding and documentation lineage.
Availability
IDT7027L55PF/S2909 is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics flight control units, and medical imaging data buffers requiring stable component supply across extended product lifecycles.
Supply support for IDT7027L55PF/S2909 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, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
IDT7027L55PF/S2909 belongs to the 7027 family of dual-port SRAMs designed specifically for deterministic inter-processor communication in hard real-time systems where software arbitration introduces unacceptable latency or jitter.
FAQ
What is the maximum operating temperature range for IDT7027L55PF/S2909?
IDT7027L55PF/S2909 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time, standby current, and BUSY arbitration timing. The device maintains full functionality without derating within this range, making it suitable for deployment in harsh environments such as factory automation controllers and outdoor telecom equipment.
Does IDT7027L55PF/S2909 support true simultaneous read/write to the same memory location?
Yes, IDT7027L55PF/S2909 features true dual-ported memory cells that allow simultaneous access to the same address by both ports. When contention occurs, on-chip arbitration asserts BUSY on the later-arriving port, preventing data corruption. This capability is confirmed in the functional block diagram and Truth Table V, and is fundamental to its use in lock-free inter-processor communication.
How does the M/S pin affect BUSY pin behavior in IDT7027L55PF/S2909?
The M/S pin configures BUSY pin directionality: when M/S = VIH, BUSYL and BUSYR operate as push-pull outputs (Master mode); when M/S = VIL, they become inputs (Slave mode). In Slave mode, an external BUSY signal inhibits writes, enabling daisy-chained arbitration. This behavior is explicitly defined in Note 1 of the Pin Configurations section and verified in Truth Table V.
What is the standby power consumption of IDT7027L55PF/S2909?
IDT7027L55PF/S2909 consumes 1 mW typical standby power (ISB3, both ports fully deselected with CMOS-level inputs). This value is measured at VCC = 5.0 V and TA = +25°C per Table 10a, and remains valid across the full industrial temperature range. The low standby current supports energy-sensitive applications like battery-backed data loggers and portable test equipment.
Can IDT7027L55PF/S2909 be used in a 32-bit data bus configuration?
Yes, IDT7027L55PF/S2909 supports 32-bit bus expansion via master/slave cascading. When configured with M/S = VIH (Master) and M/S = VIL (Slave), the BUSY and INT signals coordinate handshaking between devices. The datasheet confirms this capability in the "IDT MASTER/SLAVE Dual-Port RAM approach" description on page 2 and Figure 1's functional block diagram.
7027L55PF/S2909 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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7027L55PF/S2909 FAQ
1.How can I place an order for 7027L55PF/S2909 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7027L55PF/S2909 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 7027L55PF/S2909 reliable?
The price and inventory of 7027L55PF/S2909 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7027L55PF/S2909 is usually 5 days.
3.What payment methods are accepted for 7027L55PF/S2909?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7027L55PF/S2909 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7027L55PF/S2909?
7027L55PF/S2909 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7027L55PF/S2909 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 7027L55PF/S2909?
For technical support, including 7027L55PF/S2909 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7027L55PF/S2909 requirements.
6.How does Aetrix verify that 7027L55PF/S2909 is sourced from the original manufacturer or authorized distributors?
All 7027L55PF/S2909 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 7027L55PF/S2909 meets industry standards.
7.What is the process for return or replacement of 7027L55PF/S2909?
All 7027L55PF/S2909 units undergo pre-shipment inspection (PSI). If there is an issue with 7027L55PF/S2909, 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 7027L55PF/S2909 part is unused and in its original packaging.
Return procedure for 7027L55PF/S2909:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7027L55PF/S2909 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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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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