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Renesas 7140SA25PF
- Part No.:
- 7140SA25PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140SA25PF.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
7140SA25PF from IDT is a 1K × 8 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting fully asynchronous left/right port access with 25ns max read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory systems without external logic.
For engineers reviewing the 7140SA25PF datasheet, 7140SA25PF pinout, 7140SA25PF application, or 7140SA25PF equivalent, key selection criteria include BUSY input behavior (not output), absence of on-chip arbitration logic, compatibility with IDT7130SA25PF as MASTER, and FP48 ceramic flatpack packaging for high-reliability embedded control.
Technical Context
The 7140SA25PF operates as a SLAVE dual-port SRAM with dedicated left (L) and right (R) ports, each featuring independent address (A0–A9), data (I/O0–I/O7), and control lines (CEL/CER, OEL/OER, R/WL/R/WR). BUSYL and BUSYR are inputs-unlike the MASTER IDT7130-which internally inhibit writes when asserted low.
Port-to-port communication uses INTL/INTR flags and address-matched BUSY arbitration; write contention resolution relies on tAPS (5ns arbitration priority setup) and tBDD timing (25ns BUSY disable to valid data), with no on-chip arbitration logic-requiring external coordination via the MASTER device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 = 1024 words × 8 bits; supports byte-wide independent access per port. |
| Access Time | 25ns (max) read cycle time; determines minimum clock period in synchronous interfaces. |
| Supply Voltage | 5.0V ±10% (4.5–5.5V); single-rail TTL compatibility eliminates level-shifting needs. |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded control and motor drives. |
| Standby Current | 25mA (ISB1, TTL-level CE high); enables low-power sleep modes in battery-backed systems. |
| Package | 48-pin ceramic flatpack (FP48); hermetic sealing ensures reliability in harsh environments. |
| Bus Interface | Fully asynchronous dual-port; no clock required-simplifies timing-critical real-time firmware design. |
Pinout & Package
48-pin ceramic flatpack (FP48), body size ≈ 0.75 in × 0.75 in × 0.11 in, with 2×24 staggered pin layout and index mark at Pin 1 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24, 25, 48) | Ground reference | Four dedicated ground pins reduce ground bounce and improve noise immunity across both ports. |
| VCC (Pins 23, 26) | Power supply | Dual VCC pins ensure stable 5V distribution to core logic and I/O drivers independently. |
| CEL / CER | Chip enable (left/right) | Active-low enables; controls port activation and power-down entry (ISB1/ISB2 states). |
| OEL / OER | Output enable (left/right) | Active-low tri-states I/O bus; allows shared data bus operation without external transceivers. |
| R/WL / R/WR | Read/write direction (left/right) | High = read, low = write; defines data flow direction per port during active cycles. |
| BUSYL / BUSYR | Busy input (left/right) | SLAVE-only inputs; low = write inhibited at that port due to address contention with MASTER. |
| INTL / INTR | Interrupt flag (left/right) | Open-drain outputs; signal inter-port events (e.g., flag set/reset via address 3FEh/3FFh). |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit addressing per port; supports full 1K memory map access without external decoding. |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit buses; electrically isolated between ports-no internal bus contention. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only architecture | Eliminates redundant arbitration logic; reduces gate count and power vs. standalone dual-ports. |
| BUSY input signaling | Enables deterministic contention resolution when paired with IDT7130 MASTER-no software arbitration needed. |
| Asynchronous dual-port operation | Supports independent CPU/DSP or processor-peripheral access without clock domain synchronization. |
| TTL-compatible I/O | Direct interface to legacy 5V microcontrollers and FPGAs-no level shifters required. |
| Industrial temperature grade | Validated operation from –40°C to +85°C-suitable for motor control, PLCs, and avionics subsystems. |
Applications
| Motor Control System | Industrial PLC Data Exchange |
|---|---|
Use Scenario: Real-time coordination between motion controller (left port) and safety monitor (right port) sharing position/status data. IC Role / Device Role / Timing Role: SLAVE dual-port RAM buffers synchronized sensor updates and command acknowledgments with sub-25ns latency. Use Value: Eliminates polling delays and race conditions-enables deterministic 10kHz servo loop execution. | Use Scenario: Isolating ladder logic scan engine (left port) from HMI update engine (right port) in modular PLC backplane. IC Role / Device Role / Timing Role: Shared memory resource with hardware-enforced write protection via BUSY inputs during scan transitions. Use Value: Prevents partial writes during state changes-ensures atomic tag updates across distributed I/O modules. |
| Avionics Sensor Fusion | DSP-Based Radar Processing |
Use Scenario: Concurrent access to inertial measurement unit (IMU) data by flight computer (left port) and health monitoring unit (right port). IC Role / Device Role / Timing Role: SLAVE RAM in MASTER/SLAVE pair with IDT7130SA25PF; provides contention-free 1K buffer for AHRS algorithms. Use Value: Guarantees data coherency without software locks-critical for DO-254 Level A certification. | Use Scenario: Streaming ADC samples from RF front-end (left port) to DSP core (right port) in pulsed radar receiver. IC Role / Device Role / Timing Role: Asynchronous FIFO replacement; absorbs timing skew between sampling clock and processing clock domains. Use Value: Enables continuous capture at 20MSPS while DSP executes variable-latency FFT kernels-no dropped pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C135-25JC | 5V, 1K × 8, 25ns, 52-pin PLCC; includes on-chip arbitration and BUSY output-MASTER-capable. | Self-contained arbitration eliminates need for external MASTER IC but requires redesign of BUSY handling logic. | Select when replacing standalone dual-ports-not MASTER/SLAVE systems-due to functional mismatch in BUSY role. |
| IDT7130SA25PF | Same speed, package, and family-but MASTER device with BUSY output, on-chip arbitration, and INT flag generation logic. | Cannot substitute directly: 7140SA25PF expects BUSY as input; 7130SA25PF drives it as open-drain output requiring pull-up. | Use only as paired MASTER in new designs; not a drop-in replacement-requires PCB-level signal routing changes. |
Compared with CY7C135-25JC and IDT7130SA25PF, the 7140SA25PF delivers lower system complexity in MASTER/SLAVE configurations by offloading arbitration to the MASTER, reducing component count and board area-while maintaining identical timing and voltage specs.
Availability
7140SA25PF is available at Aetrix Electronics and suitable for motor control systems, industrial PLCs, avionics data concentrators, and radar signal processors requiring stable component supply across extended product lifecycles.
Supply support for 7140SA25PF 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, acquired by Renesas in 2019.
The IDT7130/7140 family was designed specifically for high-reliability, asynchronous dual-port memory expansion in military, industrial, and telecom infrastructure-emphasizing deterministic contention resolution and hermetic packaging.
FAQ
What is the function of BUSYL and BUSYR on the 7140SA25PF?
BUSYL and BUSYR are dedicated input signals on the 7140SA25PF-unlike the MASTER IDT7130 where they are outputs. When either is driven LOW by the MASTER device, writes to the corresponding port are internally inhibited to prevent address contention. This SLAVE-only behavior enables hardware-coordinated memory access without software arbitration.
Can the 7140SA25PF operate as a standalone dual-port RAM without the IDT7130 MASTER?
No-the 7140SA25PF lacks on-chip arbitration logic and relies on external BUSY signaling from a MASTER device like the IDT7130SA25PF. Attempting standalone use results in undefined write behavior during port contention; it is architecturally designed only for SLAVE operation in paired configurations.
What is the maximum operating frequency supported by the 7140SA25PF?
The 7140SA25PF does not use a clock; its performance is defined by timing parameters-not frequency. With a 25ns maximum read cycle time (tRC), it supports effective data throughput up to 40 MHz in tightly controlled asynchronous interfaces, assuming minimal board trace delays and proper termination.
Does the 7140SA25PF support battery backup or data retention mode?
No-only the LA suffix variants (e.g., 7140LA25PF) support 2V data retention. The 7140SA25PF is the standard-power version with typical active power consumption of 550mW and standby current of 25mA (ISB1), optimized for performance over low-voltage holdover capability.
Which package types are available for the 7140SA25PF, and what is the FP48 footprint size?
The 7140SA25PF is offered in 48-pin ceramic flatpack (FP48), with body dimensions approximately 0.75 in × 0.75 in × 0.11 in. Other packages (DIP, LCC, PLCC, TQFP) exist in the 7140SA/LA family-but FP48 is the variant designated by the 'PF' suffix in 7140SA25PF, confirming hermetic ceramic construction.
7140SA25PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
7140SA25PF FAQ
1.How can I place an order for 7140SA25PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140SA25PF 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 7140SA25PF reliable?
The price and inventory of 7140SA25PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140SA25PF is usually 5 days.
3.What payment methods are accepted for 7140SA25PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140SA25PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140SA25PF?
7140SA25PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140SA25PF 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 7140SA25PF?
For technical support, including 7140SA25PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140SA25PF requirements.
6.How does Aetrix verify that 7140SA25PF is sourced from the original manufacturer or authorized distributors?
All 7140SA25PF 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 7140SA25PF meets industry standards.
7.What is the process for return or replacement of 7140SA25PF?
All 7140SA25PF units undergo pre-shipment inspection (PSI). If there is an issue with 7140SA25PF, 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 7140SA25PF part is unused and in its original packaging.
Return procedure for 7140SA25PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140SA25PF Tags
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