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Renesas 7008L25PFI8
- Part No.:
- 7008L25PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7008L25PFI8.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT7008L25PFI8 from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-port static RAM with independent left/right ports, 25 ns maximum access time, TTL-compatible 5V ±10% supply, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the IDT7008L25PFI8 datasheet, IDT7008L25PFI8 pinout, IDT7008L25PFI8 application, or IDT7008L25PFI8 equivalent, key selection criteria include BUSY/INT flag timing (tBDD ≤ 25 ns), low standby power (ISB3 = 0.2 mA typ.), M/S-configurable master/slave cascading, and 100-pin TQFP packaging with verified pin mapping for PCB layout.
Technical Context
The IDT7008L25PFI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - enabling simultaneous read/write to the same memory location without contention. Its on-chip arbitration logic uses push-pull BUSY outputs (not tri-state) and supports both address-match and CE-controlled BUSY assertion modes.
It integrates eight hardware semaphores addressed via A0–A2, accessed only when CE = VIH and SEM = VIL, with write-to-I/O0/read-from-all-I/Os protocol. The M/S pin configures BUSYL/BUSYR as output (VIH = Master) or input (VIL = Slave), directly enabling depth expansion in 16-bit+ systems without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 (512 Kbit), true dual-port SRAM with independent left/right access paths |
| Access Time (max) | 25 ns - guarantees valid data at I/O within 25 ns after address/CE/OE setup, critical for real-time inter-processor handshaking |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; all VCC pins must be connected; no mixed-voltage operation |
| Standby Current (ISB3) | 0.2 mA (typ.) - full standby mode with CMOS-level inputs; enables ultra-low-power sleep in battery-backed systems |
| Operating Temperature | –40°C to +85°C - industrial-grade rating confirmed for continuous operation across extended thermal environments |
| Package | 100-pin TQFP (PNG100) - 14 mm × 14 mm body, lead-free, RoHS-compliant, verified pinout per IDT doc 3198 drw 03 |
| BUSY Timing (tBDD) | 25 ns (max) - disable-to-valid-data delay ensures deterministic resolution of port-to-port write contention |
Pinout & Package
Package: 100-pin Thin Quad Flatpack (TQFP), body size ≈ 14 mm × 14 mm × 1.4 mm, lead-free, RoHS-compliant (IDT package code PNG100).
| 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/R/WL assertion |
| A0R–A15R | Right port address inputs | 16-bit address bus for right-side memory access; independent timing from left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OEL = VIH or CE0L/CE1L = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; isolated from left port; supports simultaneous read/write to same location |
| CE0L, CE1L | Left port chip enables | TTL/CMOS-compatible enables; CE0L = VIL + CE1L = VIH selects left port; dual enables allow depth expansion |
| CE0R, CE1R | Right port chip enables | Identical logic to left side; enables independent power-down per port (ISB1–ISB4 modes) |
| R/WL, R/WR | Read/write controls | Active-low write enable; R/WL = VIL initiates left-port write; no internal latching - fully asynchronous |
| OEL, OER | Output enables | Control I/O drivers only; do not affect internal memory access - outputs go Hi-Z when deasserted |
| SEML, SEMR | Semaphore enables | Enable semaphore register access (A0–A2) when CE = VIH; required for inter-processor token passing |
| INTL, INTR | Interrupt flags | Push-pull outputs; INTL asserted when right port writes FFFEh; INTR asserted when left port writes FFFFh |
| BUSYL, BUSYR | Arbitration flags | Push-pull outputs (Master) or inputs (Slave); BUSY = LOW blocks write on opposite port during contention |
| M/S | Master/Slave select | M/S = VIH → BUSYL/BUSYR are outputs; M/S = VIL → BUSYL/BUSYR are inputs; enables daisy-chain configuration |
| VCC, GND | Power & ground | Multiple VCC/GND pins required - all must be connected per datasheet Note 1 & 4; decoupling essential for 25 ns timing |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent read/write access to identical memory locations - eliminates software polling or external arbitration logic |
| Hardware semaphore support | Eight dedicated flags (A0–A2) accessible via I/O0 write / all-I/O read - provides atomic resource locking between processors without CPU intervention |
| Configurable BUSY arbitration | M/S pin selects Master (BUSY output) or Slave (BUSY input) mode - allows seamless cascading of multiple IDT7008 devices for >16-bit data buses |
| Ultra-low standby power | 0.2 mA typical ISB3 current with CMOS inputs - reduces system power by >95% vs active mode (200 mA), ideal for always-on embedded controllers |
| Industrial temperature range | –40°C to +85°C operation validated across voltage (4.5–5.5 V) and timing margins - suitable for automotive ECUs and industrial PLCs |
| 100-pin TQFP package | Surface-mount footprint with 0.5 mm pitch; compatible with standard reflow profiles; eliminates PGA/PLCC socket dependencies and improves board reliability |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processor (DSP) Co-Processing |
|---|---|
Use Scenario: Two microcontrollers exchange sensor data and control commands via shared memory with guaranteed atomicity. IC Role / Device Role / Timing Role: IDT7008L25PFI8 serves as a contention-free mailbox using semaphore flags and BUSY arbitration to prevent race conditions during concurrent access. Use Value: Eliminates need for software mutexes or external arbitration logic; 25 ns access enables sub-µs message latency between cores. |
Use Scenario: A main MCU offloads FFT computation to a dedicated DSP, sharing input buffers and result arrays. IC Role / Device Role / Timing Role: IDT7008L25PFI8 acts as a zero-wait-state dual-access buffer - DSP reads input while MCU writes next frame, and vice versa. Use Value: Sustains 40 MB/s effective throughput (2 × 8-bit @ 25 ns) without DMA stalls or pipeline bubbles. |
| Redundant Control System Memory | Industrial Motion Controller Buffer |
Use Scenario: Primary and backup PLCs maintain synchronized state via mirrored memory regions with automatic failover detection. IC Role / Device Role / Timing Role: IDT7008L25PFI8 provides physically isolated read/write ports - one for primary, one for backup - with interrupt-driven status updates. Use Value: INTL/INTR flags signal state changes in <40 ns (tINS), enabling sub-millisecond fault response without polling overhead. |
Use Scenario: Servo drive firmware buffers position setpoints and feedback data between FPGA motion engine and ARM application processor. IC Role / Device Role / Timing Role: IDT7008L25PFI8 functions as a deterministic, low-latency FIFO - FPGA writes at 10 MHz, ARM reads at 1 kHz, with no bus contention. Use Value: Hardware BUSY signaling prevents write collisions during ARM-initiated buffer reads, ensuring jitter-free motion profiling. |
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-25AXC | 5V, 64K × 16, 25 ns, 100-pin TQFP - wider data bus but no native semaphore logic; requires external arbitration for multi-processor use | Best for 16-bit-only systems needing higher bandwidth; unsuitable where semaphore-based resource locking is required | Select when data width >8 bits is mandatory and software arbitration is acceptable |
| AS7C364096B-25TIN | 3.3V, 64K × 8, 25 ns, 100-pin TQFP - lower voltage, no BUSY/INT/SEM pins; asynchronous dual-port only, no hardware arbitration | Applicable in 3.3V domains with simpler inter-processor protocols; lacks IDT7008L25PFI8's industrial temp and robust contention handling | Choose for cost-sensitive 3.3V designs where full hardware arbitration is unnecessary |
Compared with CY7C028V-25AXC and AS7C364096B-25TIN, the IDT7008L25PFI8 uniquely delivers integrated semaphore registers, push-pull BUSY/INT flags, and M/S-configurable master/slave operation - making it the only option among the three that eliminates external logic for deterministic real-time inter-processor synchronization in 5V industrial systems.
Availability
IDT7008L25PFI8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal co-processing, and redundant control system memory requiring stable component supply, long-term lifecycle support, and verified industrial-temperature performance.
Supply support for IDT7008L25PFI8 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
Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered high-performance dual-port SRAM architectures for embedded real-time systems.
The IDT7008L25PFI8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial automation, telecom infrastructure, and avionics - where hardware arbitration and sub-µs latency are non-negotiable.
FAQ
What is the operating temperature range for the IDT7008L25PFI8?
The IDT7008L25PFI8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all electrical specifications including access time (25 ns max), standby current (0.2 mA typ.), and BUSY arbitration timing (tBDD ≤ 25 ns). It is not qualified for commercial-only grades (0°C to +70°C) or extended ranges beyond +85°C.
Does the IDT7008L25PFI8 support true simultaneous read/write to the same memory address?
Yes, the IDT7008L25PFI8 implements true dual-port SRAM cells that allow concurrent read and write operations to the identical memory location - one port reading while the other writes - without data corruption or bus contention. This capability is intrinsic to its cell architecture and does not require external logic or timing coordination.
How is semaphore functionality implemented in the IDT7008L25PFI8?
The IDT7008L25PFI8 integrates eight hardware semaphore flags addressed by A0–A2. To access them, CE must be VIH and SEM must be VIL. Writing "0" or "1" to I/O0 sets the flag; reading returns the value on all I/O lines (I/O0–I/O7). This provides atomic, lock-free resource sharing between processors without CPU intervention or software overhead.
What is the function of the M/S pin on the IDT7008L25PFI8?
The M/S pin configures the IDT7008L25PFI8 as either Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL and BUSYR are push-pull outputs used to block writes on the opposite port during contention. In Slave mode, they become inputs - allowing cascaded devices to resolve arbitration hierarchically without external logic.
Can the IDT7008L25PFI8 operate with a 3.3V supply?
No, the IDT7008L25PFI8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V) and is not compatible with 3.3V logic levels. Its inputs are TTL-compatible (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and all VCC pins must be connected to 5V. Using 3.3V will result in undefined operation, failed arbitration, and potential damage due to input threshold violations.
7008L25PFI8 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:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 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)
7008L25PFI8 FAQ
1.How can I place an order for 7008L25PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7008L25PFI8 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 7008L25PFI8 reliable?
The price and inventory of 7008L25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7008L25PFI8 is usually 5 days.
3.What payment methods are accepted for 7008L25PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7008L25PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7008L25PFI8?
7008L25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7008L25PFI8 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 7008L25PFI8?
For technical support, including 7008L25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7008L25PFI8 requirements.
6.How does Aetrix verify that 7008L25PFI8 is sourced from the original manufacturer or authorized distributors?
All 7008L25PFI8 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 7008L25PFI8 meets industry standards.
7.What is the process for return or replacement of 7008L25PFI8?
All 7008L25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7008L25PFI8, 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 7008L25PFI8 part is unused and in its original packaging.
Return procedure for 7008L25PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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