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Renesas 70V24S20PF
- Part No.:
- 70V24S20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24S20PF.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,052
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Product details
Overview
70V24S20PF from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 20 ns maximum access time (commercial/industrial), 3.3 V ±0.3 V single supply, and 84-pin PLCC package. It enables simultaneous read/write access to shared memory in real-time inter-processor communication systems such as telecom line cards and industrial PLCs.
For engineers reviewing the 70V24S20PF datasheet, 70V24S20PF pinout, 70V24S20PF application, or 70V24S20PF equivalent, key selection criteria include dual-port arbitration logic, on-chip semaphore support, BUSY/INT flag signaling, byte-select control for multiplexed bus compatibility, and industrial temperature range (-40°C to +85°C) operation.
Technical Context
The 70V24S20PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent, collision-free access without external arbitration logic. Its on-chip hardware semaphore logic supports eight shared flags addressed via A0–A2, with dedicated SEM, INT, and BUSY signals for inter-port coordination.
It uses CMOS high-performance technology and features automatic power-down via CE control, delivering 400 mW typical active power and 660 µW typical standby power. The device supports MASTER/SLAVE cascading for 32-bit+ data width expansion using M/S pin configuration and BUSY flag handshaking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K x 16 bits (64 Kbit total, true dual-port) |
| Access Time (max) | 20 ns - guarantees sub-50 MHz synchronous interface timing margin in industrial temp range |
| Supply Voltage | 3.3 V ±0.3 V - LVTTL-compatible; eliminates need for level shifters in 3.3 V systems |
| Operating Temperature | -40°C to +85°C - qualified for industrial embedded control and telecom infrastructure |
| Active Power (typ) | 400 mW - enables thermal management in dense PCB layouts without forced cooling |
| Standby Power (typ) | 660 µW - supports low-power sleep modes in battery-backed or energy-sensitive applications |
| I/O Interface | Separate upper/lower byte controls (UBR/LBR, UBL/LBL) - enables 8-bit microcontroller bus interfacing without glue logic |
Pinout & Package
70V24S20PF is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 1.15 in × 1.15 in footprint and 0.17 in height. Pin 1 is marked by corner notch; all VDD pins require local 3.3 V decoupling, and all VSS pins must be connected to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; A12L is NC |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; A12R is NC |
| I/O0L–I/O7L | Left port lower-byte data I/O | 8-bit bidirectional data path; controlled by LBL and CEL |
| I/O8L–I/O15L | Left port upper-byte data I/O | 8-bit bidirectional data path; controlled by UBL and CEL |
| I/O0R–I/O7R | Right port lower-byte data I/O | 8-bit bidirectional data path; controlled by LBR and CER |
| I/O8R–I/O15R | Right port upper-byte data I/O | 8-bit bidirectional data path; controlled by UBR and CER |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; independent control enables selective port power-down |
| OEL / OER | Output enable (left/right) | Active-low enables output drivers; allows tri-state sharing of data bus |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read - supports standard microprocessor timing |
| UBL / UBR | Upper byte select (left/right) | Enables upper 8 bits (I/O8–I/O15); used with LBL/LBR for byte granularity |
| LBL / LBR | Lower byte select (left/right) | Enables lower 8 bits (I/O0–I/O7); enables 8-bit peripheral interfacing |
| SEML / SEMR | Semaphore enable (left/right) | Activates on-chip semaphore register access (A0–A2 addressable) |
| INTL / INTR | Interrupt flag (left/right) | Open-drain push-pull output signals inter-port event completion |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull output indicates port contention during simultaneous same-address access |
| M/S | Master/Slave select | VIL = Slave (BUSY input); VIH = Master (BUSY output) - enables daisy-chained arbitration |
| VDD | Power supply | 3.3 V ±0.3 V; multiple pins require distributed decoupling |
| VSS | Ground | Signal and power ground; multiple pins require low-inductance return paths |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads/writes to identical addresses without data corruption or arbitration delay |
| On-chip port arbitration logic | Eliminates need for external priority encoders or FPGA-based arbiters in multi-CPU designs |
| Full hardware semaphore support | Eight dedicated flags accessible via A0–A2; enables lock-free synchronization between heterogeneous processors |
| Separate upper/lower byte control | Permits 8-bit microcontrollers to access 16-bit memory without external multiplexing or wait-state insertion |
| MASTER/SLAVE cascading capability | Supports 32-bit+ data width expansion using BUSY handshaking - no additional discrete logic required |
Applications
| Telecom Line Card Buffering | Industrial PLC Inter-Processor Communication |
|---|---|
Use Scenario: Dual-CPU architecture in carrier-grade TDM switching modules where DSP and ARM cores share real-time packet metadata. IC Role / Device Role / Timing Role: Shared memory buffer with deterministic 20 ns access ensures sub-microsecond inter-core message latency. Use Value: Eliminates software-based mailbox polling; BUSY/INT flags reduce CPU overhead by >40% vs. spinlock implementations. | Use Scenario: Redundant controller pair in programmable logic controllers performing synchronized motion control loops. IC Role / Device Role / Timing Role: Synchronization hub using hardware semaphores to coordinate I/O update cycles across CPUs. Use Value: Prevents race conditions during shared register writes; guarantees atomic flag updates within 5 ns window (tSPS). |
| Avionics Data Concentrator | Medical Imaging Real-Time FIFO |
Use Scenario: ARINC 664 (AFDX) end-system aggregating sensor data from multiple LRUs into a central flight computer. IC Role / Device Role / Timing Role: Dual-port SRAM acts as time-deterministic bridge between deterministic Ethernet MAC and safety-critical processor. Use Value: 20 ns access + -40°C to +85°C rating meets DO-254 Class C timing and environmental requirements. | Use Scenario: Ultrasound beamformer subsystem requiring ping-pong buffering between ADC sampling and DSP processing pipelines. IC Role / Device Role / Timing Role: Asynchronous FIFO replacement enabling independent clock domains (50 MHz ADC, 100 MHz DSP). Use Value: Eliminates metastability risk; full hardware semaphore support enables zero-overhead buffer pointer exchange. |
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-20AXC | 4K x 16, 20 ns, 3.3 V, 84-pin PLCC - identical speed/package but Cypress implementation lacks integrated BUSY arbitration logic | Requires external logic for port contention detection; not drop-in for BUSY-driven handshake protocols | Select only if existing design already implements external arbitration or uses polling-based synchronization |
| IDT70V25S20PF | 4K x 16, 20 ns, 3.3 V, 100-pin TQFP - same family, higher pin count, includes A12 address line and expanded I/O drive strength | Not pin-compatible; requires PCB redesign; suited for 32-bit bus expansion via MASTER/SLAVE mode | Choose when system demands wider data path or needs A12 for future memory mapping scalability |
Compared with CY7C024AV-20AXC, the 70V24S20PF provides built-in BUSY arbitration and semaphore logic - reducing BOM count and improving determinism. Versus IDT70V25S20PF, it offers identical functionality in a smaller 84-pin PLCC footprint, simplifying layout in space-constrained industrial modules.
Availability
70V24S20PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, avionics data concentrators, and medical imaging systems requiring stable component supply across extended product lifecycles.
Supply support for 70V24S20PF 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 IDT70V24 product line delivers high-speed, low-power dual-port SRAMs optimized for real-time inter-processor communication in industrial, telecom, and aerospace applications where deterministic latency and hardware-enforced synchronization are critical.
FAQ
What is the maximum operating temperature range supported by the 70V24S20PF?
The 70V24S20PF is rated for industrial temperature operation from -40°C to +85°C. This specification is validated per the manufacturer's DC and AC electrical characteristics tables under the "70V25/24X20" speed grade column, confirming full functionality including 20 ns access time and 660 µW standby current across the entire range.
Does the 70V24S20PF support true simultaneous read operations on both ports to the same memory location?
Yes, the 70V24S20PF implements true dual-port SRAM cells that allow simultaneous reads from both left and right ports to the same address without contention or data corruption. This behavior is explicitly stated in the Features section and confirmed by the functional block diagram showing independent I/O control paths per port.
How does the BUSY flag operate in MASTER/SLAVE configurations with the 70V24S20PF?
In MASTER/SLAVE mode, the 70V24S20PF uses the M/S pin to configure BUSY behavior: when M/S = VIH, BUSY is an output indicating local port contention; when M/S = VIL, BUSY is an input accepting the master's BUSY signal. This enables daisy-chained arbitration without external logic, as documented in Note 2 of the Pin Configurations section.
What is the function of the SEM pin on the 70V24S20PF, and how is it used?
The SEM pin (Semaphore Enable) activates on-chip hardware semaphore registers. When SEM = VIL and CE = VIH (or UB & LB = VIH), the device enters semaphore mode - allowing eight flags to be written via I/O0 and read across all I/O lines (I/O0–I/O15), with addressing via A0–A2. This is detailed in Truth Table II and the Semaphore Read/Write Control description.
Is the 70V24S20PF pin-compatible with other members of the IDT70V24/25 family, such as the 70V25S20PF?
No, the 70V24S20PF is not pin-compatible with the 70V25S20PF. The 70V24S20PF uses an 84-pin PLCC package with A0–A11 addressing and NC on A12, while the 70V25S20PF uses a 100-pin TQFP package with full A0–A12 addressing and different pin assignments for I/O and control signals, as shown in Figures 5 and 6 of the datasheet.
70V24S20PF 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:
- 20ns
- Access Time:
- 20 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)
70V24S20PF FAQ
1.How can I place an order for 70V24S20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24S20PF 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 70V24S20PF reliable?
The price and inventory of 70V24S20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24S20PF is usually 5 days.
3.What payment methods are accepted for 70V24S20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24S20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24S20PF?
70V24S20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24S20PF 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 70V24S20PF?
For technical support, including 70V24S20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24S20PF requirements.
6.How does Aetrix verify that 70V24S20PF is sourced from the original manufacturer or authorized distributors?
All 70V24S20PF 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 70V24S20PF meets industry standards.
7.What is the process for return or replacement of 70V24S20PF?
All 70V24S20PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V24S20PF, 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 70V24S20PF part is unused and in its original packaging.
Return procedure for 70V24S20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24S20PF Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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