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Renesas 7008L20PFI8
- Part No.:
- 7008L20PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7008L20PFI8.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT7008L20PFI8 from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-port static RAM with independent left/right ports, 20 ns max access time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous reads/writes to the same memory location and supports master/slave arbitration for 16-bit+ bus expansion in real-time embedded control systems.
For engineers reviewing the IDT7008L20PFI8 datasheet, IDT7008L20PFI8 pinout, IDT7008L20PFI8 application, or IDT7008L20PFI8 equivalent, key selection considerations include BUSY/INT semaphore arbitration timing, dual CE-controlled power-down modes, port-to-port contention resolution, and TQFP-100 package compatibility with PCB layout for dual-bus interconnects.
Technical Context
The IDT7008L20PFI8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A15L/I/O0L–I/O7L/CE0L/CE1L/R/WL/OEL/SEML/INTL/BUSYL on left; mirrored on right), enabling concurrent read/write operations without internal clocking. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion (push-pull, not tri-state) and supports semaphore signaling across eight flags addressed by A0–A2.
It features two independent chip-enable schemes (CE0/CE1 per port) for selective power-down, with four standby current modes (ISB1–ISB4) ranging from 0.2 mA (full CMOS standby) to 13 mA (one-port TTL standby). The M/S pin configures master (BUSY output) or slave (BUSY input) behavior for cascaded multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit total), true dual-port SRAM cells permitting simultaneous reads of identical addresses |
| Access Time (max) | 20 ns - guarantees valid data within 20 ns after address/CE/OE stabilization for industrial-temp operation |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; all VCC pins must be connected; no mixed-voltage operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments; not rated for automotive or extended temp ranges |
| Standby Current (ISB3) | 0.2 mA (typ.) - ultra-low full-standby mode when both ports use CMOS-level inputs (VIH/VIL thresholds met) |
| Bus Interface | Two independent 8-bit bidirectional I/O ports (I/O0L–I/O7L and I/O0R–I/O7R) with separate R/W, OE, and CE controls |
| Arbitration Logic | Hardware BUSY flag with tAPS = 5 ns setup time; tBDD = 20 ns disable-to-valid-data delay ensures deterministic contention resolution |
Pinout & Package
Package: 100-pin Thin Quad Flatpack (TQFP), body size ≈ 1.12 in × 1.12 in × 0.16 in, lead pitch 0.5 mm, RoHS-compliant green variant available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L | Left port address inputs | 16-bit address bus for left-side memory access; must meet tAS = 0 ns setup relative to CE/R/W |
| A0R–A15R | Right port address inputs | 16-bit address bus for right-side access; independent timing allows asynchronous interleaving with left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; driven low/high during writes, high-Z when OEL = VIH or CE0L/CE1L = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; electrically isolated from left port; no shared bus loading effects |
| CE0L, CE1L | Left port chip enables | TTL/CMOS-compatible enables; CE0L = VIL + CE1L = VIH selects port; both VIH disables port and enters standby |
| CE0R, CE1R | Right port chip enables | Identical logic to left port; enables depth expansion without external gating logic |
| R/WL, R/WR | Read/write direction control | Active-low write enable; HIGH = read, LOW = write; must remain HIGH during address transitions |
| OEL, OER | Output enable | Controls I/O drivers only; does not affect internal memory access or power state |
| SEML, SEMR | Semaphore enable | Active-low; enables access to 8 semaphore flags (addressed by A0–A2); CE = VIH required for semaphore mode |
| INTL, INTR | Interrupt flags | Push-pull outputs; INTL asserted when right port writes FFFEh; INTR asserted when left port writes FFFFh |
| BUSYL, BUSYR | Busy arbitration flags | Push-pull (not open-drain); MASTER mode (M/S = VIH): outputs indicating port contention; SLAVE mode (M/S = VIL): inputs inhibiting writes |
| M/S | Master/Slave select | VIH = MASTER (BUSYL/BUSYR outputs); VIL = SLAVE (BUSYL/BUSYR inputs); determines arbitration role in cascaded systems |
| VCC, GND | Power and ground | Multiple VCC/GND pins require low-inductance PCB routing; all VCC pins must connect to 5V supply; all GND pins to ground plane |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cell architecture | Enables simultaneous read access to identical memory locations from both ports-no arbitration delay or data corruption |
| Hardware semaphore signaling | Eight dedicated flags (A0–A2 addressable) accessible via I/O0 write / I/O0–I/O7 read, eliminating software mutex overhead in RTOS environments |
| Configurable master/slave arbitration | M/S pin selects push-pull BUSY output (master) or BUSY input (slave), enabling scalable multi-RAM systems without external logic |
| Four-tier standby power management | ISB3 = 0.2 mA (full CMOS standby) and ISB1 = 50 mA (both ports TTL standby) allow precise power optimization per system state |
| Industrial-grade reliability | Qualified over –40°C to +85°C with 100% production-tested AC timing (tRC = 20 ns max) and DC parameters (VOH ≥ 2.4 V, VOL ≤ 0.4 V) |
Applications
| Real-Time Motion Control | Dual-CPU Communication Buffer |
|---|---|
Use Scenario: Coordinating servo motor position updates between FPGA motion planner and ARM-based safety monitor in CNC machinery. IC Role / Device Role / Timing Role: Dual-port RAM acts as synchronized mailbox-FPGA writes position commands to right port while ARM reads via left port with <20 ns latency. Use Value: Hardware BUSY arbitration prevents race conditions during simultaneous access; semaphore flags coordinate handshaking without CPU polling. |
Use Scenario: Exchanging sensor fusion data between primary application processor and secondary security co-processor in industrial gateway devices. IC Role / Device Role / Timing Role: Acts as zero-latency shared memory buffer-each CPU accesses independent ports, eliminating bus contention delays. Use Value: 20 ns access time enables sub-microsecond inter-processor messaging; interrupt flags (INTL/INTR) trigger immediate context switches. |
| Redundant Network Switch ASIC Interface | Avionics Data Acquisition Buffer |
Use Scenario: Buffering packet metadata between line-card ASIC and control-plane CPU in carrier-class Ethernet switches with hitless failover. IC Role / Device Role / Timing Role: Left port interfaces ASIC DMA engine; right port serves CPU; M/S configuration enables master-slave failover coordination. Use Value: tBDD = 20 ns ensures deterministic recovery after port conflict; dual CE enables independent power gating during maintenance mode. |
Use Scenario: Capturing synchronized analog sensor streams (accelerometer, gyroscope, pressure) in flight data recorders with dual ADC controllers. IC Role / Device Role / Timing Role: Serves as time-aligned buffer-left port receives ADC0 stream, right port feeds ADC1 stream, both writing to shared memory space. Use Value: Industrial temp rating (–40°C to +85°C) ensures operation in unheated avionics bays; low ISB3 current extends battery backup runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-200BZI | 3.3V core, 200 MHz (5 ns cycle), 128K × 16 organization, QFP-100 package | Requires level-shifting for 5V systems; higher bandwidth but incompatible voltage domain | Select only if migrating to 3.3V architecture and needing wider data bus; not drop-in compatible |
| AS7C362000B-20TIN | 5V, 20 ns, 256K × 8, TQFP-100, no BUSY/semaphore logic | Lacks hardware arbitration-requires external logic or software protocols for multi-port coordination | Choose for cost-sensitive designs where arbitration is handled in firmware; no hardware BUSY support |
Compared with CY7C1362BV33-200BZI and AS7C362000B-20TIN, the IDT7008L20PFI8 uniquely integrates master/slave arbitration, semaphore flags, and push-pull BUSY signaling in a 5V industrial-temp package-enabling deterministic real-time inter-processor communication without external components.
Availability
IDT7008L20PFI8 is available at Aetrix Electronics and suitable for real-time motion control, dual-CPU communication buffers, and redundant network switch ASIC interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for IDT7008L20PFI8 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, RF, and sensor signal conditioning solutions before its acquisition by Renesas Electronics in 2019.
The IDT7008L20PFI8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic real-time embedded systems requiring hardware-coordinated multi-processor memory sharing without software overhead.
FAQ
What is the maximum guaranteed access time for IDT7008L20PFI8 under industrial temperature conditions?
The IDT7008L20PFI8 has a maximum guaranteed access time of 20 ns across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, verified per AC Electrical Characteristics Table 12 in the official datasheet. This applies to tAA, tACE, and tAOE parameters under specified load conditions (347 Ω / 5 pF).
How does the M/S pin affect BUSY signal behavior in IDT7008L20PFI8?
In IDT7008L20PFI8, the M/S pin configures BUSY functionality: when M/S = VIH, BUSYL and BUSYR are push-pull outputs indicating port contention; when M/S = VIL, they become inputs that inhibit writes on the respective port. This enables master/slave cascading without external arbitration logic.
Can IDT7008L20PFI8 support simultaneous read operations from both ports to the same memory address?
Yes, the IDT7008L20PFI8 uses true dual-port SRAM cells that permit simultaneous read operations from both left and right ports to identical memory addresses without conflict, delay, or data corruption-no BUSY assertion or arbitration delay occurs during concurrent reads.
What are the power consumption modes supported by IDT7008L20PFI8, and how are they controlled?
IDT7008L20PFI8 supports four standby modes: ISB1 (both ports TTL standby, 50 mA typ.), ISB2 (one port active, 110 mA typ.), ISB3 (full CMOS standby, 0.2 mA typ.), and ISB4 (one port CMOS standby, 110 mA typ.). All are controlled exclusively by CE0/CE1 logic levels per port-no external control signals required.
How are interrupt flags (INTL/INTR) triggered and cleared in IDT7008L20PFI8?
In IDT7008L20PFI8, INTL is asserted when the right port writes to address FFFEh (with CER = R/WR = VIL); it clears when the left port reads FFFEh (CEL = OEL = VIL). INTR is asserted when the left port writes FFFFh and clears when the right port reads FFFFh-both are push-pull outputs with tINS/tINR ≤ 40 ns.
7008L20PFI8 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:
- 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)
7008L20PFI8 FAQ
1.How can I place an order for 7008L20PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7008L20PFI8 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 7008L20PFI8 reliable?
The price and inventory of 7008L20PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7008L20PFI8 is usually 5 days.
3.What payment methods are accepted for 7008L20PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7008L20PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7008L20PFI8?
7008L20PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7008L20PFI8 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 7008L20PFI8?
For technical support, including 7008L20PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7008L20PFI8 requirements.
6.How does Aetrix verify that 7008L20PFI8 is sourced from the original manufacturer or authorized distributors?
All 7008L20PFI8 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 7008L20PFI8 meets industry standards.
7.What is the process for return or replacement of 7008L20PFI8?
All 7008L20PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7008L20PFI8, 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 7008L20PFI8 part is unused and in its original packaging.
Return procedure for 7008L20PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7008L20PFI8 Tags
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