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Renesas 70V24L35PF
- Part No.:
- 70V24L35PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24L35PF.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,701
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Product details
Overview
70V24L35PF from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 35 ns read cycle time, 3.3 V single-supply operation, and industrial temperature range (–40°C to +85°C). It integrates on-chip semaphore logic and BUSY/INT flags for inter-processor communication in real-time embedded systems.
For engineers reviewing the 70V24L35PF datasheet, 70V24L35PF pinout, 70V24L35PF application, or 70V24L35PF equivalent, this device is selected for deterministic low-latency memory sharing between two independent bus masters-especially where hardware arbitration, byte-select control, and ultra-low standby power (660 µW typ.) are required.
Technical Context
The 70V24L35PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port. Its on-chip arbitration logic resolves simultaneous access contention via BUSY flag signaling and supports MASTER/SLAVE cascading for wider data bus expansion (e.g., 32-bit).
It features dedicated semaphore registers (8 flags, addressed by A0–A2), full LVTTL-compatible I/O, and automatic power-down via CE-controlled standby mode. The device uses CMOS process technology and operates within strict 3.3 V ±0.3 V supply tolerance across industrial temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (64 Kbit), true dual-port SRAM |
| Read Cycle Time | 35 ns max - defines minimum clock period for synchronous read interfaces |
| Supply Voltage | 3.3 V ±0.3 V - compatible with modern 3.3 V logic families without level shifting |
| Standby Current | 660 µW typ. at 3.3 V - enables ultra-low-power hold mode in battery-backed systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Package | 84-pin PLCC (PLG84) - through-hole mountable, suitable for ruggedized PCBs and legacy designs |
| I/O Compatibility | LVTTL - ensures direct interface with FPGA I/O banks and microcontroller peripherals |
Pinout & Package
84-pin Plastic Leaded Chip Carrier (PLG84) package, body size ≈ 1.15 in × 1.15 in × 0.17 in, with internal lead frame and gull-wing leads. 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) | Independent port activation; deassertion places port into low-power standby |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low signal determining direction of data transfer per port |
| OEL / OER | Output Enable (Left/Right) | Controls tri-state output drivers; allows shared bus operation |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity access to 16-bit data bus; critical for multiplexed bus compatibility |
| SEML / SEMR | Semaphore Enable | Activates 8-flag hardware semaphore block for inter-processor synchronization |
| BUSYL / BUSYR | Busy Flag (Input/Output) | Configurable as input (Slave) or output (Master); signals port contention during concurrent access |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output indicating semaphore or write completion events |
| A0L–A11L, A0R–A11R | Address Inputs | 12-bit addressing per port (4K depth); A12 is No Connect per datasheet note |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (Lower Byte) | 8-bit bidirectional data path per port; supports simultaneous read/write to same location |
| I/O8L–I/O15L, I/O8R–I/O15R | Data I/O (Upper Byte) | Second 8-bit data path per port; used with UBL/UBR for full 16-bit transfers |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous independent reads/writes from both ports without arbitration delay or external logic |
| Hardware Semaphore Logic | Eight dedicated flags accessible via A0–A2; eliminates need for software mutexes in multi-CPU systems |
| MASTER/SLAVE Cascading Support | Allows stacking multiple devices to build 32-bit+ memory systems with synchronized BUSY flag propagation |
| Ultra-Low Standby Power | 660 µW typical consumption enables long-term retention in power-constrained applications |
| Industrial Temperature Range | Validated operation from –40°C to +85°C ensures reliability in harsh environments like factory automation |
Applications
| Real-Time Industrial PLC | Dual-Core DSP Communication Buffer |
|---|---|
Use Scenario: Two independent CPU cores exchange sensor data and control commands in a programmable logic controller with deterministic timing. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration prevents race conditions during concurrent access to I/O register maps. Use Value: Eliminates software polling overhead and guarantees sub-35 ns memory access latency between cores. |
Use Scenario: A dual-DSP system processes audio streams in parallel while synchronizing FFT results and filter coefficients. IC Role / Device Role / Timing Role: Inter-processor mailbox using semaphore flags to coordinate DMA transfers and interrupt handshaking. Use Value: Reduces inter-core latency to ≤5 ns (SEM flag update) and avoids bus contention stalls during burst transfers. |
| Avionics Data Concentrator | Medical Imaging Frame Buffer |
Use Scenario: ARINC 429 receiver and MIL-STD-1553B bus controller share telemetry data in airborne flight management units. IC Role / Device Role / Timing Role: Deterministic dual-port SRAM acting as time-critical message queue with BUSY-driven flow control. Use Value: Ensures zero-data-loss packet forwarding under worst-case 35 ns read/write cycles and –40°C cold-start conditions. |
Use Scenario: MRI subsystem buffers raw image frames between acquisition FPGA and reconstruction processor. IC Role / Device Role / Timing Role: High-reliability frame store with independent read/write ports enabling pipelined acquisition and processing. Use Value: Sustains continuous 16-bit pixel streaming at >20 MB/s with no wait states or external arbitration logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-133AXC | 4K × 16, 133 MHz (≈7.5 ns cycle), 3.3 V, 100-pin TQFP | Higher speed but larger footprint; no native BUSY arbitration-requires external logic for contention resolution | Select when throughput >100 MB/s is required and PCB space permits TQFP; not drop-in due to pinout and arbitration differences |
| IDT70V25L25PF | 8K × 18, 25 ns, 3.3 V, 100-pin TQFP; includes upper/lower byte enable and identical semaphore/BUSY logic | Higher density and faster access, but incompatible 100-pin TQFP package and different address depth | Choose for new designs needing >64 Kbit capacity and tighter timing; requires layout revision and firmware address mapping update |
Compared with CY7C1362BV33-133AXC and IDT70V25L25PF, the 70V24L35PF offers optimal balance of industrial temperature support, ultra-low standby power, and proven BUSY-based arbitration in compact 84-pin PLCC-making it ideal for cost-sensitive, space-constrained, and reliability-critical legacy or upgrade programs.
Availability
70V24L35PF is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data concentrators, and medical imaging frame buffers requiring stable component supply, long lifecycle support, and guaranteed industrial-temperature qualification.
Supply support for 70V24L35PF 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 sensor solutions for communications, computing, and industrial markets.
The IDT70V24 family was designed specifically for deterministic inter-processor communication in embedded systems requiring hardware-managed dual-port memory with minimal external logic and robust industrial-grade operation.
FAQ
What is the maximum operating frequency supported by the 70V24L35PF?
The 70V24L35PF does not operate at a fixed clock frequency but supports asynchronous operation with a maximum read cycle time of 35 ns. This corresponds to an effective maximum throughput of approximately 28.6 MHz for consecutive read operations. Its timing is defined by access parameters (tAA, tACE, tAOE), not a system clock, making it suitable for glueless interfacing with microcontrollers and FPGAs that generate discrete control strobes.
Does the 70V24L35PF support simultaneous read and write operations on the same memory location?
Yes, the 70V24L35PF implements true dual-port SRAM cells that allow simultaneous reads from both ports to the same address. However, simultaneous write operations to the same location are resolved via hardware arbitration: the BUSY flag asserts to indicate contention, and only one port completes the write-ensuring data integrity without external intervention.
How is the semaphore function implemented in the 70V24L35PF?
The 70V24L35PF contains eight dedicated hardware semaphore flags accessed via address bits A0–A2. When SEM is asserted and CE/UB/LB are configured per datasheet Truth Table II, I/O0 writes to or reads from the selected flag. All 16 I/O lines reflect the flag value on read, enabling fast, atomic synchronization between processors without software overhead.
What is the role of the M/S pin in the 70V24L35PF?
The M/S (Master/Slave Select) pin configures the 70V24L35PF's BUSY pin behavior: when pulled high (VIH), BUSY functions as an output indicating local port contention; when pulled low (VIL), BUSY acts as an input accepting BUSY signals from a cascaded Master device. This enables hierarchical arbitration in multi-device memory expansions without external logic.
Is the 70V24L35PF RoHS-compliant and halogen-free?
Yes, the 70V24L35PF is a green part compliant with RoHS Directive 2011/65/EU and halogen-free per JEDEC JS709A. This is confirmed in the official IDT ordering information section of the datasheet (DSC-5624/10, October 2019), and the device carries appropriate marking per manufacturer specifications.
70V24L35PF 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:
- 64Kbit
- Memory Organization:
- 4K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 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)
70V24L35PF FAQ
1.How can I place an order for 70V24L35PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24L35PF 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 70V24L35PF reliable?
The price and inventory of 70V24L35PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L35PF is usually 5 days.
3.What payment methods are accepted for 70V24L35PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L35PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24L35PF?
70V24L35PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24L35PF 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 70V24L35PF?
For technical support, including 70V24L35PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L35PF requirements.
6.How does Aetrix verify that 70V24L35PF is sourced from the original manufacturer or authorized distributors?
All 70V24L35PF 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 70V24L35PF meets industry standards.
7.What is the process for return or replacement of 70V24L35PF?
All 70V24L35PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L35PF, 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 70V24L35PF part is unused and in its original packaging.
Return procedure for 70V24L35PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24L35PF 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
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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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