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Renesas 70V25L55PF
- Part No.:
- 70V25L55PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V25L55PF.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,352
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Product details
Overview
IDT70V25L55PF from Integrated Device Technology is a high-speed 3.3V 4K x 16 true dual-port static RAM with independent left/right ports, 55 ns read cycle time, 3.3 mW standby power, and full on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to shared memory in real-time inter-processor communication systems.
For engineers reviewing the IDT70V25L55PF datasheet, IDT70V25L55PF pinout, IDT70V25L55PF application, or IDT70V25L55PF equivalent, key selection criteria include dual-port timing compatibility, industrial temperature support (–40°C to +85°C), TQFP-100 package footprint, and integrated BUSY/INT flag signaling for master/slave memory expansion.
Technical Context
The IDT70V25L55PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, supporting concurrent reads/writes to any memory location-including simultaneous reads of the same address. Its on-chip arbitration logic resolves port contention without external logic.
It features dedicated MASTER/SLAVE select (M/S) pin for cascading configurations, BUSY flag signaling (output on Master, input on Slave), and full hardware semaphore support across eight flags addressed via A0–A2. All I/Os are LVTTL-compatible with single 3.3 V ±0.3 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K x 16-bit (64 Kbit), true dual-port SRAM |
| Read Cycle Time | 55 ns max - defines minimum clock period for synchronous interface designs |
| Standby Power | 3.3 mW typ. - enables low-power idle states in battery-backed or energy-sensitive systems |
| Operating Voltage | 3.3 V ±0.3 V - compatible with modern 3.3 V logic families; no level-shifting required |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Package | 100-pin TQFP (14 mm × 14 mm) - surface-mount compatible with standard reflow profiles |
| Arbitration Logic | On-chip port arbitration + semaphore signaling - eliminates need for external glue logic in multi-CPU systems |
Pinout & Package
Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm. Pin 1 marked by corner notch; all VDD pins require local decoupling; all VSS pins must be connected to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls power-down entry and memory access gating |
| R/WL / R/WR | Read/Write Control (Left / Right) | Determines data direction per port; HIGH = read, LOW = write |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O drivers independently per port during read cycles |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity access to 16-bit data bus; supports multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Activates on-chip semaphore flag access (8 flags, addressed by A0–A2) |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Master outputs BUSY when port contention detected; Slave inputs BUSY for synchronization |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or memory event to host processor |
| M/S | Master/Slave Select | VIL configures device as Slave (BUSY input); VIH configures as Master (BUSY output) |
| A0L–A11L, A0R–A11R | Address Inputs | 12-bit addressing per port (4K depth); A12 is No Connect for IDT70V25 |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (Lower Byte) | 8-bit bidirectional data path per port; paired with LBL/LBR for byte-level control |
| I/O8L–I/O15L, I/O8R–I/O15R | Data I/O (Upper Byte) | 8-bit bidirectional data path per port; paired with UBL/UBR for byte-level control |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Independent, fully asynchronous access from both ports - enables zero-wait-state inter-processor communication |
| Integrated Semaphore Logic | Eight hardware semaphore flags with atomic read/write - eliminates software race conditions in multi-core resource sharing |
| Master/Slave Cascading Support | Dedicated M/S pin and BUSY flag handshake - allows expansion to 32-bit+ data width without external arbitration logic |
| Low-Power Standby Mode | 3.3 mW typical standby power - reduces system-level power budget in always-on embedded controllers |
| LVTTL-Compatible I/O | Single 3.3 V supply with VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures interoperability with FPGA, ASIC, and microcontroller I/O banks |
Applications
| Industrial PLC Memory Buffer | Real-Time DSP Co-Processor Interface |
|---|---|
Use Scenario: Shared memory between main PLC CPU and motion control co-processor requiring deterministic latency and collision-free access. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized data exchange buffer with hardware semaphore coordination for task handshaking. Use Value: 55 ns read cycle and on-chip arbitration eliminate software polling delays and guarantee sub-100 ns inter-processor response. | Use Scenario: Real-time audio/video frame buffering between host ARM processor and TI C6000 DSP in broadcast encoder hardware. IC Role / Device Role / Timing Role: High-speed memory bridge enabling concurrent DMA writes (host) and algorithmic reads (DSP) without bus contention. Use Value: Independent left/right I/O and byte-select controls allow simultaneous 16-bit transfers at full throughput without pipeline stalls. |
| Avionics Data Concentrator | Medical Imaging Signal Processor |
Use Scenario: ARINC 429 data aggregation unit requiring fault-tolerant memory access across redundant processing channels. IC Role / Device Role / Timing Role: Dual-port SRAM provides isolated memory access paths for primary and backup flight control processors. Use Value: Industrial temperature range (–40°C to +85°C) and 3.3 mW standby power meet DO-254 environmental and power constraints. | Use Scenario: MRI signal chain where FPGA-acquired raw sensor data must be concurrently processed and transferred to host PC via PCIe. IC Role / Device Role / Timing Role: Memory buffer decouples high-speed ADC capture (FPGA port) from variable-rate host readout (CPU port). Use Value: BUSY flag signaling prevents data corruption during overlapping access; 100-pin TQFP fits dense medical PCB 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 |
|---|---|---|---|
| CY7C1362BV33-55AXI | 55 ns access, 4K x 16, 3.3 V, but uses different BUSY/INT polarity and lacks M/S pin for cascading | No native master/slave configuration; requires external logic for multi-device expansion | Select when existing design uses Cypress timing models and does not require hardware BUSY chaining |
| AS7C34098B-55TIN | 55 ns access, 4K x 16, 3.3 V, but only offers commercial temp range (0°C to +70°C) and no semaphore logic | Not suitable for industrial or avionics use; no hardware resource locking capability | Select for cost-sensitive consumer applications where temperature range and semaphore are non-critical |
Compared with CY7C1362BV33-55AXI and AS7C34098B-55TIN, the IDT70V25L55PF uniquely integrates master/slave BUSY handshake and full semaphore arbitration-reducing BOM count and PCB area in multi-processor systems requiring deterministic resource sharing.
Availability
IDT70V25L55PF is available at Aetrix Electronics and suitable for industrial PLCs, real-time DSP interfaces, avionics data concentrators, and medical imaging signal processors requiring stable component supply across extended lifecycle programs.
Supply support for IDT70V25L55PF 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance data conversion solutions.
The IDT70V25 family delivers high-speed, low-power dual-port SRAMs designed specifically for real-time inter-processor communication, motion control, and embedded systems requiring deterministic memory access and hardware resource arbitration.
FAQ
What is the maximum operating frequency supported by the IDT70V25L55PF?
The IDT70V25L55PF has a 55 ns read cycle time (tRC), which corresponds to a maximum sustained operation frequency of approximately 18.2 MHz in worst-case conditions. This value is derived directly from the datasheet's AC Electrical Characteristics table for the "70V25/24X55" speed grade under commercial temperature conditions. The IDT70V25L55PF does not specify a clock input; its timing is asynchronous and governed by control signal setup/hold windows.
Does the IDT70V25L55PF support industrial temperature operation?
Yes, the IDT70V25L55PF is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the "Maximum Operating Temperature and Supply Voltage" table and explicitly stated in the device description section of the datasheet. This qualification makes it suitable for deployment in factory automation, transportation, and outdoor embedded systems.
How does the BUSY flag function in master vs. slave configuration on the IDT70V25L55PF?
When M/S = VIH, the IDT70V25L55PF operates as Master and drives BUSYL/BUSYR as outputs indicating port contention; when M/S = VIL, it operates as Slave and accepts BUSYL/BUSYR as inputs for synchronization. This behavior is defined in Note 2 of the Pin Names table and verified in the Functional Block Diagram and Truth Table I.
Can the IDT70V25L55PF be used in a 32-bit data bus configuration?
Yes, the IDT70V25L55PF supports 32-bit expansion using master/slave cascading: two devices can be configured-one as Master, one as Slave-with BUSY flag chaining and shared address/control lines. This capability is documented in the Features section ("IDT70V35/34 (IDT70V25/24) easily expands data bus width to 36 bits (32 bits) or more") and validated in the Functional Block Diagram.
What is the purpose of the SEM pin on the IDT70V25L55PF?
The SEM (Semaphore Enable) pin on the IDT70V25L55PF activates hardware semaphore flag access. When SEM = VIL and CE = VIH (or UB & LB = VIH), the device enters semaphore mode, allowing eight atomic flags (addressed by A0–A2) to be read/written via I/O0–I/O15. This is confirmed in Truth Table II and the "Full on-chip hardware support of semaphore signaling" feature bullet.
70V25L55PF 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:
- 128Kbit
- Memory Organization:
- 8K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V25L55PF FAQ
1.How can I place an order for 70V25L55PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V25L55PF 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 70V25L55PF reliable?
The price and inventory of 70V25L55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V25L55PF is usually 5 days.
3.What payment methods are accepted for 70V25L55PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V25L55PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V25L55PF?
70V25L55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V25L55PF 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 70V25L55PF?
For technical support, including 70V25L55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V25L55PF requirements.
6.How does Aetrix verify that 70V25L55PF is sourced from the original manufacturer or authorized distributors?
All 70V25L55PF 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 70V25L55PF meets industry standards.
7.What is the process for return or replacement of 70V25L55PF?
All 70V25L55PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V25L55PF, 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 70V25L55PF part is unused and in its original packaging.
Return procedure for 70V25L55PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V25L55PF Tags
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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
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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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