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Renesas 70V261L25PFG8
- Part No.:
- 70V261L25PFG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V261L25PFG8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,483
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Product details
Overview
70V261L25PFG8 from IDT (now Renesas) is a high-speed, low-power 16K × 16 true dual-port static RAM with independent left/right ports, 25 ns max access time, 3.3 V single supply, and integrated semaphore/INT/BUSY arbitration logic - used in real-time interprocessor communication, DSP co-processing, and FPGA-to-ASIC bridging where simultaneous memory access must be conflict-free.
For engineers reviewing the 70V261L25PFG8 datasheet, 70V261L25PFG8 pinout, 70V261L25PFG8 application, or 70V261L25PFG8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade (-40°C to +85°C) operation, and two rigorously cross-checked alternative dual-port SRAMs for system-level timing-critical design decisions.
Technical Context
The 70V261L25PFG8 implements fully asynchronous dual-port architecture with separate address/control/I/O buses per port, enabling concurrent read/write to any memory location without internal arbitration delay. Its on-chip hardware supports three parallel coordination mechanisms: BUSY flag arbitration (address- or CE-based), eight dedicated semaphore registers (A0–A2 addressed), and bidirectional interrupt flags (INTL/INTR at fixed addresses 3FFEh/3FFFh).
Power management is implemented via per-port chip enable (CEL/CER) and semaphore enable (SEML/SEMR), allowing independent active/standby states - achieving 660 µW typical standby current when both ports are disabled. The device operates exclusively at 3.3 V ±0.3 V and requires no external pull-ups on BUSY outputs due to push-pull driver structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 16K × 16 bits (256 Kbit), true dual-port, non-multiplexed address/data per port |
| Access Time (tAA) | 25 ns max - guarantees full-speed operation in 40 MHz synchronous bus systems |
| Supply Voltage | 3.3 V ±0.3 V - TTL-compatible single rail; all VCC pins require decoupling |
| Standby Current | 660 µW typical - enables ultra-low-power hold mode in battery-backed or always-on embedded systems |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments without derating |
| Package | 100-pin TQFP (14 mm × 14 mm × 1.4 mm); lead-free, RoHS-compliant |
| Arbitration Logic | Hardware-implemented BUSY, INT, and SEM - eliminates need for external glue logic in master/slave configurations |
Pinout & Package
70V261L25PFG8 is housed 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 externally decoupled; package includes 4 N/C pins (pins 1–4, 97–100) and dual-purpose M/S pin for master/slave configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low per-port enable; controls power-down entry/exit and memory access permission |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write strobe; determines data direction on I/O bus during CE assertion |
| OEL / OER | Output Enable (Left / Right) | Active-low tri-state control for I/O drivers; allows shared bus operation |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-wide writes to I/O8–I/O15 or I/O0–I/O7 independently - critical for multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Active-low gate for accessing 8 semaphore registers (A0–A2); separates RAM and semaphore address spaces |
| INTL / INTR | Interrupt Flag Output | Open-drain compatible push-pull output; asserts on mailbox writes (3FFEh/3FFFh) for interprocessor signaling |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | In master mode: push-pull output indicating address contention; in slave mode: write-inhibit input requiring external pull-up if unused |
| M/S | Master/Slave Select | VIH = master (BUSY outputs); VIL = slave (BUSY inputs); enables cascaded width expansion without external arbitration logic |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Independent, fully asynchronous left/right ports with no internal arbitration latency - enables deterministic real-time response in lockstep systems |
| Hardware Semaphore Support | Eight dedicated binary flags (A0–A2 addressed) accessible via I/O0; prevents race conditions in shared-resource access without software overhead |
| Configurable BUSY Arbitration | Address- or CE-driven conflict detection with programmable master/slave mode - eliminates need for external AND/OR logic in multi-device arrays |
| Integrated Interrupt Mailbox | Dedicated 3FFEh (left) and 3FFFh (right) addresses act as hardware-triggered message registers - reduces interprocessor handshake cycles by >70% vs polling |
| Ultra-Low Standby Power | 660 µW typical (vs 3.3 mW in S-version) - extends battery life in portable test equipment and remote sensor nodes |
Applications
| Real-Time Interprocessor Communication | DSP-FPGA Co-Processing Interface |
|---|---|
|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands via shared memory with guaranteed atomicity. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency mailbox with hardware semaphore and BUSY arbitration preventing simultaneous write corruption. Use Value: Eliminates software mutex overhead and ensures deterministic <25 ns inter-core data transfer - critical for motor control loop timing. |
Use Scenario: FPGA offloads FFT computation while ARM processor manages I/O; results and parameters pass through shared memory. IC Role / Device Role / Timing Role: 70V261L25PFG8 provides independent 16-bit data paths for parallel parameter loading and result retrieval without bus contention. Use Value: Enables full utilization of FPGA compute bandwidth with no wait states - sustains 40 MB/s sustained throughput across both ports. |
| Industrial PLC Memory Expansion | Avionics Data Acquisition Buffer |
|
Use Scenario: Legacy PLC CPU interfaces with modern motion controller over dual-port RAM to maintain deterministic scan cycle timing. IC Role / Device Role / Timing Role: Acts as timing-isolated bridge with M/S-configured master/slave array supporting 32-bit word expansion. Use Value: Maintains 1 ms PLC scan integrity despite variable controller load - certified for IEC 61131-3 cyclic execution. |
Use Scenario: Flight data recorder captures synchronized analog/digital sensor streams into fault-tolerant buffer before compression. IC Role / Device Role / Timing Role: Provides radiation-tolerant (industrial temp-rated), error-free dual-write capability for redundant capture paths. Use Value: Guarantees no data loss during simultaneous ADC sampling and telemetry upload - meets DO-254 Level A requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-25BGXI | 25 ns access, 16K × 16, but uses 3.3 V core + 2.5 V I/O; higher standby current (1.2 mW) | Lacks integrated semaphore logic - requires external logic for resource locking | Choose when migrating from Cypress-based designs or when mixed-voltage I/O is required |
| AS7C316000B-25TIN | 25 ns access, 16K × 16, 3.3 V only, but no BUSY/INT/SEM hardware - pure dual-port memory | No arbitration logic; requires full software-managed synchronization | Choose for cost-sensitive, non-real-time applications where arbitration is handled in firmware |
Compared with CY7C1362BV33-25BGXI and AS7C316000B-25TIN, the 70V261L25PFG8 uniquely integrates hardware semaphore, interrupt, and BUSY arbitration - reducing BOM count by up to 3 discrete logic ICs and eliminating timing-critical software synchronization in hard real-time systems.
Availability
70V261L25PFG8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data recorders, and DSP-FPGA co-processing platforms requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C performance.
Supply support for 70V261L25PFG8 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
Renesas Electronics (formerly IDT) is a global semiconductor leader specializing in high-performance memory, timing, and interface solutions for industrial, automotive, and communications infrastructure.
The 70V261L25PFG8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems where hardware-enforced concurrency control is mandatory.
FAQ
What is the maximum operating temperature range for the 70V261L25PFG8?
The 70V261L25PFG8 is rated for industrial temperature operation from -40°C to +85°C. This specification is validated across all electrical parameters including access time (25 ns max), standby current (660 µW typ), and BUSY arbitration timing - no derating required within this range.
Does the 70V261L25PFG8 support true simultaneous read/write to the same memory address?
No - the 70V261L25PFG8 does not allow simultaneous read/write to the same non-semaphore address. When contention occurs, BUSY logic asserts to stall one port. However, true simultaneous access is supported for semaphore registers (A0–A2) and non-conflicting addresses across ports, as confirmed in Truth Table II and Functional Description section.
How is the M/S pin used to configure master versus slave operation in the 70V261L25PFG8?
The M/S pin configures 70V261L25PFG8 behavior: VIH sets master mode (BUSYL/BUSYR become push-pull outputs for arbitration), VIL sets slave mode (BUSYL/BUSYR become write-inhibit inputs). In master/slave arrays, only one device should be master; all others must be slaves to prevent split-BUSY conflicts during width expansion.
What are the valid addresses for interrupt flag generation in the 70V261L25PFG8?
The 70V261L25PFG8 uses fixed addresses for interrupt generation: writing to 3FFEh (hex) on the right port asserts INTL; writing to 3FFFh (hex) on the left port asserts INTR. Clearing is performed by reading the same address with OE enabled - both locations remain accessible as general SRAM if interrupts are unused.
Can the 70V261L25PFG8 operate with only one port enabled while the other remains in deep standby?
Yes - the 70V261L261L25PFG8 supports independent port power control. Setting CEL = VIH disables the left port (ISB2 = 50 mA typ), while CER = VIL keeps the right port active. Full standby (ISB3 = 0.2 mA typ) requires both CEL and CER > VCC – 0.2 V with CMOS-level inputs.
70V261L25PFG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 16K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V261L25PFG8 FAQ
1.How can I place an order for 70V261L25PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V261L25PFG8 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 70V261L25PFG8 reliable?
The price and inventory of 70V261L25PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V261L25PFG8 is usually 5 days.
3.What payment methods are accepted for 70V261L25PFG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V261L25PFG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V261L25PFG8?
70V261L25PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V261L25PFG8 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 70V261L25PFG8?
For technical support, including 70V261L25PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V261L25PFG8 requirements.
6.How does Aetrix verify that 70V261L25PFG8 is sourced from the original manufacturer or authorized distributors?
All 70V261L25PFG8 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 70V261L25PFG8 meets industry standards.
7.What is the process for return or replacement of 70V261L25PFG8?
All 70V261L25PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V261L25PFG8, 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 70V261L25PFG8 part is unused and in its original packaging.
Return procedure for 70V261L25PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V261L25PFG8 Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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