My Inquiry
My Account
Renesas 70V24S25PFI8
- Part No.:
- 70V24S25PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24S25PFI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,513
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
70V24S25PFI8 from Integrated Device Technology is a high-speed 3.3V 4K x 16 true dual-port static RAM with independent left/right ports, 25 ns max access time (industrial grade), 400 mW typical active power, and 660 µW standby power. It supports simultaneous asynchronous reads/writes, on-chip semaphore arbitration, and master/slave cascading for wider bus expansion in real-time embedded control systems.
For engineers reviewing the 70V24S25PFI8 datasheet, 70V24S25PFI8 pinout, 70V24S25PFI8 application, or 70V24S25PFI8 equivalent, this page delivers verified electrical specs, industrial-temperature PLCC-84 package details, dual-port timing behavior, and validated alternatives for memory coherency-critical designs.
Technical Context
The 70V24S25PFI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling concurrent read/write to any memory location without external arbitration logic. Its on-chip semaphore logic uses A0–A2 addressing to manage eight shared flags across ports.
It features LVTTL-compatible 3.3 V ±0.3 V single-supply operation, TTL-level input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and push-pull BUSY/INT outputs. The device supports byte-selectable writes via UBL/LBL and automatic power-down when CE is deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (64 Kbit), true dual-port SRAM |
| Access Time (max) | 25 ns - guarantees deterministic latency for real-time interrupt handlers and DSP data buffers |
| Supply Voltage | 3.3 V ±0.3 V - compatible with modern low-voltage logic families without level-shifting |
| Active Power (typ) | 400 mW - enables thermal management in dense industrial PCB layouts |
| Standby Power (typ) | 660 µW - supports ultra-low-power sleep modes in battery-backed systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation and transportation control environments |
| I/O Interface | LVTTL-compatible - ensures direct interfacing with FPGA I/O banks and microcontroller GPIOs |
Pinout & Package
70V24S25PFI8 is housed in an 84-pin PLCC (PLG84) package measuring 1.15 in × 1.15 in × 0.17 in, with lead-free (green) construction and industrial-grade thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Independent port activation; deassertion places that port in low-power standby |
| R/WL / R/WR | Read/Write Control (Left/Right) | Asynchronous direction control; no clock required for memory transactions |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O pins independently-critical for bus sharing and contention avoidance |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity writes to I/O0–I/O7 (lower) or I/O8–I/O15 (upper) bytes |
| SEML / SEMR | Semaphore Enable | Activates 3-bit addressable (A0–A2) semaphore flag access for inter-processor synchronization |
| BUSYL / BUSYR | Busy Flag (Input/Output) | Master port outputs BUSY; slave port inputs BUSY-enables hardware handshaking in cascaded configurations |
| INTL / INTR | Interrupt Flag | Push-pull output signals semaphore or write completion events without external pull-ups |
| A0L–A11L, A0R–A11R | Address Inputs | 12-bit addressing per port supports full 4K depth; A12 is NC per datasheet Note 1 |
| I/O0L–I/O15L, I/O0R–I/O15R | Data I/O (bidirectional) | 16-bit parallel interface per port; no external transceivers needed for full-width transfers |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent access from two processors or cores without arbitration overhead or wait states |
| On-Chip Semaphore Logic | Eight hardware-managed flags accessible via A0–A2 reduce software locking complexity and eliminate race conditions |
| Master/Slave Cascading Support | M/S pin configures BUSY as output (master) or input (slave), enabling error-free 32-bit+ memory expansion without glue logic |
| Byte-Controlled Write Enable | UBL/LBL pins allow partial-word writes-preserving data integrity during mixed-size memory updates |
| Low-Power Standby Mode | 660 µW typical ISB3 current permits extended operation in energy-constrained industrial gateways |
Applications
| Industrial PLC Data Exchange | DSP + FPGA Co-Processing Buffer |
|---|---|
Use Scenario: Two independent controllers (e.g., motion controller and HMI processor) share real-time I/O status and setpoint data. IC Role / Device Role / Timing Role: Dual-port SRAM acts as a zero-latency shared memory buffer with hardware semaphore coordination. Use Value: Eliminates polling delays and software mutex overhead; 25 ns access ensures sub-microsecond inter-processor communication. | Use Scenario: An FPGA handles sensor preprocessing while a DSP performs FFT-based analysis on streaming data. IC Role / Device Role / Timing Role: Provides synchronous, non-blocking data handoff between FPGA write port and DSP read port. Use Value: Enables continuous data flow without pipeline stalls; byte-select writes allow FPGA to update only changed coefficients. |
| Redundant Controller Failover Memory | Avionics Display System Frame Buffer |
Use Scenario: Primary and backup flight control computers maintain identical state snapshots for seamless switchover. IC Role / Device Role / Timing Role: Acts as mirrored memory with atomic semaphore-controlled write locks during state sync. Use Value: Guarantees memory coherency across failover events; 660 µW standby supports long-term retention on backup power. | Use Scenario: Graphics processor writes rendered frames while display controller reads for scan-out, both at different rates. IC Role / Device Role / Timing Role: Serves as dual-clock domain frame buffer with independent read/write timing. Use Value: Prevents tearing or flicker by decoupling rendering and display timing; push-pull BUSY signals enable precise frame sync. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-25ZXC | 4K × 16, 25 ns, 3.3 V, TQFP-100; no M/S or BUSY cascade support | Lacks master/slave configuration and hardware BUSY signaling for multi-device expansion | Preferred where single-device integration suffices and board space allows larger TQFP footprint |
| AS7C34098B-25TIN | 4K × 16, 25 ns, 3.3 V, TSOPII-44; no semaphore or dual-interrupt capability | Missing on-chip semaphore logic and separate INT/BUSY flags-requires external sync logic | Selected for cost-sensitive, non-coherent dual-access use cases with simplified control requirements |
Compared with CY7C1362BV33-25ZXC and AS7C34098B-25TIN, the 70V24S25PFI8 uniquely delivers integrated master/slave cascading, hardware semaphore arbitration, and industrial-temperature PLCC packaging-making it the only option for robust, expandable dual-processor memory subsystems in constrained mechanical envelopes.
Availability
70V24S25PFI8 is available at Aetrix Electronics and suitable for industrial PLC data exchange, DSP+FPGA co-processing buffers, redundant controller failover memory, and avionics display system frame buffers requiring stable component supply across extended product lifecycles.
Supply support for 70V24S25PFI8 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 and computing markets.
The IDT70V24 family was designed specifically for real-time embedded systems requiring deterministic, low-latency, hardware-synchronized memory sharing between heterogeneous processors-targeting industrial automation, test equipment, and aerospace control units.
FAQ
What is the maximum operating temperature range for the 70V24S25PFI8?
The 70V24S25PFI8 is rated for industrial temperature operation from −40°C to +85°C, as confirmed in the Absolute Maximum Ratings table (page 6) and Operating Conditions table (page 6) of the official IDT datasheet DSC-5624/10. This specification applies to all speed grades within the 70V24S series, including the 25 ns variant.
Does the 70V24S25PFI8 support true simultaneous read/write operations on both ports?
Yes, the 70V24S25PFI8 implements true dual-port architecture allowing independent, fully asynchronous read or write access to any memory location from either port at the same time. This is explicitly stated in the Features section ("True Dual-Ported memory cells which allow simultaneous reads of the same memory location") and enabled by separate address, control, and I/O pins per port.
What package type and pin count does the 70V24S25PFI8 use?
The 70V24S25PFI8 uses an 84-pin PLCC (PLG84) package, as documented in the Pin Configurations section (page 4) of the IDT datasheet DSC-5624/10. The note "A12 is a NC for IDT70V24" and the top-view diagram confirm the 84-pin PLCC footprint, distinct from the 100-pin TQFP used by IDT70V35/34 variants.
How does the semaphore functionality work on the 70V24S25PFI8?
The 70V24S25PFI8 provides eight hardware semaphore flags accessed via A0–A2 address lines when SEM is asserted low. As detailed in Truth Table II (page 5), writing to I/O0 updates the selected flag, and reading returns the flag value across all I/O pins (I/O0–I/O15). This enables lock-free inter-processor synchronization without software polling.
Is the 70V24S25PFI8 pin-compatible with other members of the IDT70V24 family?
Yes-the 70V24S25PFI8 shares identical pinout and package (PLG84) with all IDT70V24 variants, including 70V24L15 and 70V24X25. Pin compatibility is confirmed by the unified "IDT70V24" pin diagram on page 4 and Note 1 stating "A12 is a NC for IDT70V24", applying uniformly across the family regardless of speed or power suffix.
70V24S25PFI8 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:
- 25ns
- Access Time:
- 25 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)
70V24S25PFI8 FAQ
1.How can I place an order for 70V24S25PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24S25PFI8 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 70V24S25PFI8 reliable?
The price and inventory of 70V24S25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24S25PFI8 is usually 5 days.
3.What payment methods are accepted for 70V24S25PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24S25PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24S25PFI8?
70V24S25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24S25PFI8 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 70V24S25PFI8?
For technical support, including 70V24S25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24S25PFI8 requirements.
6.How does Aetrix verify that 70V24S25PFI8 is sourced from the original manufacturer or authorized distributors?
All 70V24S25PFI8 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 70V24S25PFI8 meets industry standards.
7.What is the process for return or replacement of 70V24S25PFI8?
All 70V24S25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24S25PFI8, 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 70V24S25PFI8 part is unused and in its original packaging.
Return procedure for 70V24S25PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24S25PFI8 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
