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Renesas 70V24L20PFI8
- Part No.:
- 70V24L20PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24L20PFI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
70V24L20PFI8 from Integrated Device Technology (IDT) is a high-speed, low-power 4K × 16 dual-port static RAM with independent left/right asynchronous ports, 20 ns access time (industrial grade), 3.3 V single-supply operation, and full on-chip semaphore arbitration logic - used in real-time inter-processor communication systems requiring concurrent read/write access to shared memory.
For engineers reviewing the 70V24L20PFI8 datasheet, 70V24L20PFI8 pinout, 70V24L20PFI8 application, or 70V24L20PFI8 equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), 84-pin PLCC package compatibility, true dual-port bus contention resolution via BUSY/INT flags, and LVTTL-compatible I/O with separate upper/lower byte enables for multiplexed bus integration.
Technical Context
The 70V24L20PFI8 implements fully asynchronous dual-port architecture with independent address, control, and data buses per port, enabling simultaneous non-blocking reads from the same memory location. It integrates hardware semaphore logic (8 flags, addressed by A0–A2) and automatic port arbitration to prevent write collisions without external logic.
It supports MASTER/SLAVE cascading for wider data paths (e.g., 32-bit systems), where M/S pin configures BUSY as output (Master) or input (Slave). All control signals - CE, R/W, OE, UB/LB, SEM - are TTL-compatible and operate at 3.3 V ±0.3 V, with dedicated VDD/VSS pins distributed across the 84-pin PLCC footprint for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent left/right access |
| Access Time | 20 ns max (industrial temperature range −40°C to +85°C) |
| Supply Voltage | 3.3 V ±0.3 V - single LVTTL-compatible rail; no dual-voltage support |
| Power Consumption | Active: 380 mW typ.; Standby: 660 μW typ. - enables low-idle power in always-on systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded and telecom infrastructure |
| Package | 84-pin PLCC (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in |
| Bus Interface | Separate upper-byte (UBR/UBL) and lower-byte (LBR/LBL) controls - supports 8-bit multiplexed data bus interfacing |
Pinout & Package
84-pin Plastic Leaded Chip Carrier (PLG84) package with gull-wing leads; requires all VDD pins connected to 3.3 V supply and all VSS pins tied to ground. Pin 1 marked by corner notch; top view shown in datasheet Figure 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Asynchronous port enable - deassertion places respective port in standby (ISB2/ISB4 mode) |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low signal determining direction of data transfer on associated port |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O drivers when high; required for bus sharing with other devices |
| UBL / UBR | Upper Byte Select (Left / Right) | Enables I/O8–I/O15 during read/write - supports 8-bit data bus multiplexing |
| LBL / LBR | Lower Byte Select (Left / Right) | Enables I/O0–I/O7 during read/write - pairs with UBL/UBR for full 16-bit access |
| SEML / SEMR | Semaphore Enable (Left / Right) | Activates 8-flag hardware semaphore block (addressed by A0–A2) for inter-processor sync |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Open-drain push-pull output indicating port contention - used in MASTER/SLAVE arbitration |
| INTL / INTR | Interrupt Flag (Left / Right) | Non-tri-stated push-pull flag signaling semaphore event or write completion |
| A0L–A11L / A0R–A11R | Address Inputs (Left / Right) | 12-bit address bus per port - supports 4K depth (A12 is No Connect per datasheet Note 1) |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data bus per port - electrically isolated between ports |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads/writes from both ports without cycle penalty or external arbitration logic |
| Hardware Semaphore Logic | On-chip 8-flag semaphore block (A0–A2 addressable) eliminates need for discrete locking circuitry |
| MASTER/SLAVE Cascading Support | M/S pin configures BUSY as output (Master) or input (Slave), enabling error-free 32-bit+ memory expansion |
| Low-Power Standby Mode | 660 μW typical standby current (ISB3) allows battery-backed or energy-sensitive applications |
| Industrial Temperature Range | Guaranteed operation from −40°C to +85°C - suitable for base stations, motor drives, and industrial PLCs |
Applications
| Telecom Line Card Buffering | Real-Time Motion Controller Shared Memory |
|---|---|
|
Use Scenario: Dual-processor line card where DSP handles packet processing and ARM manages protocol stack, requiring zero-latency shared buffer access. IC Role / Device Role / Timing Role: 70V24L20PFI8 serves as contention-free shared SRAM with hardware semaphore coordination between processors. Use Value: Eliminates software mutex overhead and guarantees deterministic 20 ns read/write latency under worst-case thermal conditions. |
Use Scenario: CNC machine controller with FPGA motion engine and microcontroller HMI, sharing position/trajectory data in real time. IC Role / Device Role / Timing Role: 70V24L20PFI8 provides synchronized dual-port access to trajectory buffers, with BUSY flag preventing write collisions. Use Value: Enables sub-microsecond inter-processor handshaking without CPU polling or interrupt latency penalties. |
| Avionics Data Acquisition Module | Industrial Ethernet Gateway Buffer |
|
Use Scenario: DO-254-compliant flight data recorder capturing sensor streams from multiple ADCs into centralized memory. IC Role / Device Role / Timing Role: 70V24L20PFI8 acts as fault-tolerant dual-port buffer, with one port receiving ADC data and the other serving host processor queries. Use Value: Industrial temp rating and 660 μW standby ensure reliable operation in unheated avionics bays with constrained power budgets. |
Use Scenario: PROFINET gateway bridging fieldbus sensors to Ethernet backbone, requiring deterministic buffering of cyclic I/O data. IC Role / Device Role / Timing Role: 70V24L20PFI8 stores process image data, with left port updated by fieldbus controller and right port read by Ethernet MAC. Use Value: Separate UB/LB enables 8-bit microcontroller interface on one side and 16-bit Ethernet controller on the other - no glue logic needed. |
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 × 16, 20 ns, 3.3 V, but uses 100-pin TQFP; no PLCC option; higher active current (450 mW typ.) | Requires PCB redesign for 100-pin footprint; better suited for new designs with space for TQFP | Select if board layout accommodates TQFP and higher power budget is acceptable |
| IDT70V25L20PF | 8K × 18, 20 ns, 3.3 V, 100-pin TQFP; larger density and wider bus; not pin-compatible with 70V24L20PFI8 | Supports 36-bit cascaded systems; incompatible PLCC-to-TQFP package transition | Choose when memory depth > 64 Kbit or 18-bit data path is required - not a drop-in replacement |
Compared with CY7C024AV-20AXC and IDT70V25L20PF, the 70V24L20PFI8 uniquely delivers industrial-grade 20 ns performance in an 84-pin PLCC package with ultra-low 660 μW standby - critical for legacy-replacement and space-constrained embedded systems where footprint and power are non-negotiable.
Availability
70V24L20PFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and industrial Ethernet gateway applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature compliance.
Supply support for 70V24L20PFI8 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 power management ICs for communications, computing, and industrial markets.
The IDT70V24 family was designed specifically for real-time embedded systems requiring deterministic dual-processor memory sharing - emphasizing low-latency arbitration, industrial reliability, and minimal external logic dependency.
FAQ
What is the maximum operating temperature range certified for the 70V24L20PFI8?
The 70V24L20PFI8 is rated for industrial temperature operation from −40°C to +85°C, as confirmed in the Absolute Maximum Ratings table (Table 4) and Operating Conditions (Table 5) of the official IDT datasheet DSC-5624/10. This rating applies across all specified AC and DC parameters including 20 ns access time and standby current.
Does the 70V24L20PFI8 support true simultaneous read operations from both ports to the same memory address?
Yes, the 70V24L20PFI8 implements true dual-ported SRAM cells that allow concurrent reads from identical addresses on the left and right ports without contention or timing penalty - a core feature explicitly stated in the "Features" section of the datasheet and enabled by its independent port arbitration logic.
Is A12 connected or unused on the 70V24L20PFI8?
A12 is a No Connect (NC) pin on the 70V24L20PFI8, as documented in Note 1 of the Pin Configurations section (page 4) and reiterated in the Pin Names table (page 5) of the IDT datasheet DSC-5624/10. It must be left unconnected and not tied to any voltage or signal.
What is the standby current specification for the 70V24L20PFI8 under full CMOS-level disable conditions?
Under full standby conditions (both ports disabled with CE > VDD − 0.2 V, all inputs at rail, f = 0), the 70V24L20PFI8 draws 0.2 µA typical and 5 µA maximum ISB3 current - verified in Table 9b (DC Electrical Characteristics for 70V25/24) of the IDT datasheet DSC-5624/10.
Can the 70V24L20PFI8 be used in MASTER/SLAVE configurations, and how is BUSY behavior controlled?
Yes, the 70V24L20PFI8 supports MASTER/SLAVE cascading via the M/S pin: when M/S = VIH, BUSY is an output flag indicating local port contention; when M/S = VIL, BUSY becomes an input for slave synchronization - as defined in the Functional Block Diagram and Truth Table I of the IDT datasheet DSC-5624/10.
70V24L20PFI8 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:
- 20ns
- Access Time:
- 20 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)
70V24L20PFI8 FAQ
1.How can I place an order for 70V24L20PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24L20PFI8 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 70V24L20PFI8 reliable?
The price and inventory of 70V24L20PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L20PFI8 is usually 5 days.
3.What payment methods are accepted for 70V24L20PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L20PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24L20PFI8?
70V24L20PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24L20PFI8 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 70V24L20PFI8?
For technical support, including 70V24L20PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L20PFI8 requirements.
6.How does Aetrix verify that 70V24L20PFI8 is sourced from the original manufacturer or authorized distributors?
All 70V24L20PFI8 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 70V24L20PFI8 meets industry standards.
7.What is the process for return or replacement of 70V24L20PFI8?
All 70V24L20PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L20PFI8, 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 70V24L20PFI8 part is unused and in its original packaging.
Return procedure for 70V24L20PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24L20PFI8 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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