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Renesas 70V24S35PFI8
- Part No.:
- 70V24S35PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24S35PFI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,823
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Product details
Overview
70V24S35PFI8 from Integrated Device Technology is a high-speed 4K x 16 true dual-port static RAM with independent left/right ports, 35 ns read cycle time, 3.3 V single supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore arbitration, and byte-selectable I/O for multiplexed bus compatibility in real-time inter-processor communication systems.
For engineers reviewing the 70V24S35PFI8 datasheet, 70V24S35PFI8 pinout, 70V24S35PFI8 application, or 70V24S35PFI8 equivalent, key selection criteria include guaranteed 35 ns access timing under industrial conditions, 84-pin PLCC package with A12 as no-connect, low-power standby current of 13 mA (typ.), and full hardware semaphore support for multi-CPU synchronization.
Technical Context
The 70V24S35PFI8 implements fully asynchronous dual-port operation with separate address, control, and data buses per port, enabling concurrent read/write to any memory location without external arbitration logic. Its on-chip arbitration resolves port contention via BUSY flag signaling and supports MASTER/SLAVE cascading for wider data paths.
It integrates dedicated semaphore logic accessible via A0–A2 addressing and controlled by SEM, CE, UB/LB signals - allowing eight shared flags to coordinate resource access between independent processors or subsystems without software overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K x 16-bit (64 Kbit), true dual-port SRAM |
| Access Time (tAA) | 35 ns max - guarantees deterministic latency for real-time inter-processor handshaking |
| Supply Voltage | 3.3 V ± 0.3 V - compatible with LVTTL logic families and modern low-voltage system rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded control and communications equipment |
| Standby Current (ISB1) | 13 mA typ. - enables low-power idle states in battery-backed or energy-sensitive systems |
| Package | 84-pin PLCC (PLG84) - through-hole mountable, 1.15" × 1.15", A12 pin is no-connect |
| I/O Configuration | Separate upper/lower byte controls (UBR/LBR, UBL/LBL) - supports 8-bit data bus multiplexing |
Pinout & Package
84-pin PLCC (PLG84) package, body size ≈ 1.15 in × 1.15 in × 0.17 in; all VDD pins require connection to 3.3 V supply, all VSS pins to ground; A12L and A12R are no-connect pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation - enables selective power-down of unused port to reduce dynamic current |
| R/WL / R/WR | Read/Write Control (Left/Right) | Asynchronous direction control - no clock required; determines data flow per port independently |
| OEL / OER | Output Enable (Left/Right) | Tri-state control per port - allows shared bus usage without external bus transceivers |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity access - essential for byte-aligned transfers in mixed-width systems |
| SEML / SEMR | Semaphore Enable | Activates hardware semaphore register bank - eliminates need for software mutex polling |
| BUSYL / BUSYR | Busy Flag (Input/Output) | Port arbitration signal - M/S = VIH configures as Master (BUSY output); M/S = VIL as Slave (BUSY input) |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output - signals semaphore state change or write completion to host processor |
| A0L–A11L, A0R–A11R | Address Inputs | 12-bit addressing per port - supports full 4K depth; A12L/A12R are NC per datasheet note |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (Lower Byte) | 8-bit bidirectional data path - used with LBL/LBR for lower-byte operations |
| I/O8L–I/O15L, I/O8R–I/O15R | Data I/O (Upper Byte) | 8-bit bidirectional data path - used with UBL/UBR for upper-byte operations |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent reads/writes to same address - eliminates arbitration wait states in tightly coupled dual-CPU systems |
| Hardware Semaphore Logic | Eight dedicated flags addressable via A0–A2 - provides atomic test-and-set without CPU intervention or memory-mapped I/O overhead |
| Master/Slave Cascading Support | Configurable BUSY signaling via M/S pin - enables error-free expansion to 32-bit+ data buses using multiple devices |
| Low-Power Standby Mode | 13 mA typical ISB1 current - reduces system power during inter-processor idle periods without losing memory contents |
| LVTTL-Compatible Interface | 3.3 V single supply with VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures interoperability with standard 3.3 V logic without level shifters |
Applications
| Industrial PLC Communication Module | Dual-Core DSP Shared Memory Subsystem |
|---|---|
Use Scenario: Two independent microcontrollers exchange sensor data and control commands via shared memory in a programmable logic controller. IC Role / Device Role / Timing Role: Acts as non-blocking, low-latency inter-processor communication buffer with hardware semaphore coordination. Use Value: Eliminates software polling delays; 35 ns access ensures sub-100 ns message handoff between CPUs in deterministic control loops. | Use Scenario: A dual-DSP system shares filter coefficients and intermediate results in real-time audio processing pipelines. IC Role / Device Role / Timing Role: Provides synchronized, conflict-free access to shared coefficient tables using on-chip semaphore flags. Use Value: Prevents race conditions during coefficient updates; byte-select capability enables efficient 16-bit word transfers aligned to DSP data paths. |
| Avionics Data Concentrator Unit | Medical Imaging Real-Time Buffer |
Use Scenario: Flight management and navigation processors share telemetry and status registers in safety-critical avionics hardware. IC Role / Device Role / Timing Role: Serves as fault-tolerant, radiation-hardened-adjacent shared memory with BUSY-driven arbitration. Use Value: Industrial temp rating (–40°C to +85°C) and 84-pin PLCC package support ruggedized, conduction-cooled board designs. | Use Scenario: MRI or CT scanner front-end FPGA streams raw image frames into shared memory for parallel processing by ARM-based control CPU. IC Role / Device Role / Timing Role: Buffers high-throughput pixel data with simultaneous read (CPU) and write (FPGA) access. Use Value: Asynchronous dual-port operation avoids pipeline stalls; 4K × 16 organization matches common 16-bit pixel depth and frame line buffering needs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-35AXC | 4K × 16, 35 ns, 3.3 V, 100-pin TQFP - lacks PLCC package and A12 NC configuration | Requires PCB redesign due to different footprint and pinout; no native 84-pin PLCC variant | Select only if TQFP mounting and higher pin count are acceptable; verify BUSY/SEM signal mapping |
| IDT70V24L15PF | Same 4K × 16 organization but 15 ns access, lower-power L-version (660 µW standby), industrial temp | Higher performance and lower standby current, but incompatible timing margins for 35 ns–designed systems | Use when upgrading latency-critical systems; not drop-in - requires timing validation and power rail review |
Compared with CY7C024AV-35AXC and IDT70V24L15PF, the 70V24S35PFI8 uniquely combines 84-pin PLCC packaging, guaranteed 35 ns industrial-grade timing, and explicit A12 no-connect behavior - making it optimal for legacy-replacement and space-constrained through-hole designs requiring proven reliability.
Availability
70V24S35PFI8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, dual-core DSP subsystems, avionics data concentrators, and medical imaging real-time buffers requiring stable component supply across extended product lifecycles.
Supply support for 70V24S35PFI8 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 silicon solutions for communications, computing, and industrial markets.
The IDT70V24 family delivers high-speed, low-latency dual-port SRAMs optimized for real-time inter-processor communication, where deterministic access, hardware arbitration, and industrial temperature resilience are critical design requirements.
FAQ
What is the maximum access time specification for the 70V24S35PFI8?
The 70V24S35PFI8 has a maximum address access time (tAA) of 35 ns under industrial temperature conditions (–40°C to +85°C) and 3.3 V supply. This value is guaranteed across the full operating range and applies to both left and right ports independently, ensuring deterministic latency for real-time inter-processor communication.
Does the 70V24S35PFI8 support hardware semaphore functionality?
Yes, the 70V24S35PFI8 includes full on-chip hardware semaphore logic supporting eight independent flags. These are accessed via A0–A2 addressing and controlled by SEM, CE, UB, and LB signals - enabling atomic test-and-set operations without CPU intervention or external logic, as confirmed in the functional block diagram and Truth Table II of the datasheet.
What is the package type and pin count of the 70V24S35PFI8?
The 70V24S35PFI8 uses an 84-pin PLCC (PLG84) package with dimensions approximately 1.15 in × 1.15 in × 0.17 in. Per datasheet Note 1, A12L and A12R are no-connect pins, and all VDD and VSS pins must be properly decoupled to 3.3 V and ground respectively for stable operation.
Can the 70V24S35PFI8 operate in MASTER/SLAVE configurations?
Yes, the 70V24S35PFI8 supports MASTER/SLAVE cascading via the M/S pin: when M/S = VIH, BUSY is an output flag indicating port contention; when M/S = VIL, BUSY serves as an input for slave arbitration. This enables reliable expansion to 32-bit or wider data buses using multiple devices without external glue logic.
What are the standby current characteristics of the 70V24S35PFI8?
The 70V24S35PFI8 exhibits a typical standby current (ISB1) of 13 mA when both ports are disabled under TTL-level inputs and f = fMAX, as specified in Table 09b. In full CMOS standby (ISB3), current drops to 1.0 mA typ., enabling significant power savings during idle intervals while retaining memory contents.
70V24S35PFI8 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:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V24S35PFI8 FAQ
1.How can I place an order for 70V24S35PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24S35PFI8 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 70V24S35PFI8 reliable?
The price and inventory of 70V24S35PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24S35PFI8 is usually 5 days.
3.What payment methods are accepted for 70V24S35PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24S35PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24S35PFI8?
70V24S35PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24S35PFI8 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 70V24S35PFI8?
For technical support, including 70V24S35PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24S35PFI8 requirements.
6.How does Aetrix verify that 70V24S35PFI8 is sourced from the original manufacturer or authorized distributors?
All 70V24S35PFI8 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 70V24S35PFI8 meets industry standards.
7.What is the process for return or replacement of 70V24S35PFI8?
All 70V24S35PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24S35PFI8, 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 70V24S35PFI8 part is unused and in its original packaging.
Return procedure for 70V24S35PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24S35PFI8 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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