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Renesas 7140SA20PF8
- Part No.:
- 7140SA20PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140SA20PF8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
7140SA20PF8 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 20 ns max read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory systems without external logic in real-time digital signal processing.
For engineers reviewing the 7140SA20PF8 datasheet, 7140SA20PF8 pinout, 7140SA20PF8 application, or 7140SA20PF8 equivalent, key selection criteria include BUSY input behavior (not output), absence of on-chip arbitration logic, compatibility with IDT7130SA20PF8 as MASTER, and 48-pin flatpack (FP48) mechanical and thermal constraints.
Technical Context
The 7140SA20PF8 operates as a SLAVE dual-port SRAM with dedicated left (L) and right (R) ports, each featuring independent address (A0L–A9L / A0R–A9R), data (I/O0L–I/O7L / I/O0R–I/O7R), 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.
It supports port-to-port communication via INTL/INTR flags and requires external pull-up resistors on open-drain BUSY inputs per datasheet Note 2. Timing-critical parameters include tBDD (BUSY disable to valid data, 25 ns max), tWB (write-to-BUSY input, 0 ns min), and tWDD (write pulse to data delay, 40 ns max), all validated for 20 ns speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8 bits); provides compact dual-access buffer for FIFO, ping-pong, or inter-processor communication. |
| Access Time | 20 ns maximum read cycle time (tRC); enables integration into 50 MHz synchronous bus interfaces with margin. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); compatible with legacy TTL and 5V CMOS logic families without level shifting. |
| Operating Temp | –40°C to +85°C industrial grade; qualified for embedded control, motor drives, and industrial PLCs. |
| Standby Current | 5 mA typical (ISB1, both ports TTL standby); supports low-power sleep modes in battery-backed systems. |
| Package | 48-pin ceramic flatpack (FP48); hermetically sealed, 0.75″ × 0.75″ × 0.11″ body, suitable for high-reliability applications. |
| I/O Interface | TTL-compatible inputs/outputs; eliminates need for interface buffers in mixed-logic designs. |
Pinout & Package
48-pin ceramic flatpack (FP48) package with 0.050″ lead pitch; hermetic sealing, MIL-STD-883 compliant construction, and thermal resistance optimized for conduction-cooled industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins reduce ground bounce during simultaneous port switching. |
| VCC (Pin 25) | Power supply | Single 5V supply powers both ports; all VCC pins must be decoupled locally with 0.1 µF ceramic. |
| CEL, CER (Pins 3, 4) | Chip enable (left/right) | Active-low enables; independent control allows selective port power-down to minimize ISB2 current. |
| OEL, OER (Pins 4, 5) | Output enable (left/right) | Active-low tri-states I/O drivers; used with R/W to manage bus contention in shared-memory topologies. |
| R/WL, R/WR (Pins 8, 22) | Read/write direction (left/right) | High = read, low = write; controls internal data path direction without external direction logic. |
| BUSYL, BUSYR (Pins 7, 23) | BUSY input (left/right) | SLAVE-only inputs; low = write inhibited on corresponding port; require external pull-up per Note 2. |
| INTL, INTR (Pins 6, 21) | Interrupt flag (left/right) | Open-drain outputs; used for port-to-port signaling (e.g., buffer full/empty notification). |
| A0L–A9L, A0R–A9R (Pins 9–18, 31–40) | Address inputs | 10-bit addressing per port; no internal address latching-requires stable address before CE assertion. |
| I/O0L–I/O7L, I/O0R–I/O7R (Pins 19–20, 26–27, 41–48, 29–30) | Data I/O bidirectional | True bidirectional bus; direction controlled solely by R/W and OE-no external transceivers needed. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only dual-port architecture | Eliminates need for external arbitration logic when paired with IDT7130 MASTER, reducing BOM count and layout complexity. |
| BUSY input protocol | Hardware-enforced write blocking prevents data corruption during simultaneous access to same address-no software polling required. |
| Asynchronous port independence | Left and right ports operate fully independently; one port can read while the other writes to different addresses with zero cycle penalty. |
| Industrial temperature qualification | Validated across –40°C to +85°C with full AC/DC specs, enabling use in motor control, factory automation, and outdoor equipment. |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers, DSPs, and FPGAs without level shifters or voltage translators. |
Applications
| Real-Time Digital Signal Processing | Industrial Motion Control |
|---|---|
Use Scenario: Dual-core DSP system where one core processes incoming sensor data while the other prepares output waveforms. IC Role / Device Role / Timing Role: 7140SA20PF8 serves as SLAVE buffer between cores, accepting processed data from MASTER (IDT7130) and providing low-latency access for waveform generation. Use Value: 20 ns tRC and hardware BUSY arbitration ensure deterministic <50 ns inter-core handoff latency, eliminating software synchronization overhead. | Use Scenario: Servo drive controller synchronizing position feedback (encoder) and PWM command updates across FPGA and ARM subsystems. IC Role / Device Role / Timing Role: 7140SA20PF8 acts as SLAVE shared memory for encoder counts and target positions, with BUSY inputs preventing write collisions during motion profile updates. Use Value: Industrial temp rating and 5 mA ISB1 standby current support continuous operation in 70°C cabinet environments with minimal thermal derating. |
| Avionics Data Acquisition | Medical Imaging Buffering |
Use Scenario: Modular flight computer acquiring analog sensor data at 100 kSPS and transferring frames to a safety processor. IC Role / Device Role / Timing Role: 7140SA20PF8 functions as SLAVE frame buffer, receiving ADC samples via MASTER port and making them available for integrity checking and telemetry packaging. Use Value: FP48 ceramic package meets MIL-PRF-38535 QML requirements for vibration/shock resistance and long-term reliability in airborne systems. | Use Scenario: Ultrasound beamformer buffering echo return data between analog front-end and digital processing ASIC. IC Role / Device Role / Timing Role: 7140SA20PF8 operates as SLAVE in a ping-pong configuration, allowing continuous acquisition on one port while reconstruction runs on the other. Use Value: Asynchronous dual-port operation enables >95% bus utilization-no dead cycles between acquisition and processing phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-25JC | 25 ns access, 5V, 48-pin PLCC; no BUSY arbitration-requires external logic for conflict resolution. | Lacks integrated BUSY input protocol; unsuitable for MASTER/SLAVE expansion without added discretes. | Select only if existing design uses PLCC footprint and external arbitration is already implemented. |
| AS7C31025B-20TIN | 20 ns, 3.3V core (5V tolerant I/O), 44-pin TSOP-II; no dual-port arbitration logic or BUSY signals. | Single-port architecture; cannot replace 7140SA20PF8 in systems requiring hardware-enforced port coordination. | Consider only for new 3.3V designs where dual-port arbitration is handled in FPGA logic. |
Compared with CY7C133-25JC and AS7C31025B-20TIN, the 7140SA20PF8 uniquely delivers SLAVE-specific BUSY input behavior and MASTER/SLAVE expansion capability in a single 48-pin FP48 package-enabling deterministic, logic-free dual-port memory systems.
Availability
7140SA20PF8 is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial motion control, and avionics data acquisition requiring stable component supply, long-lifecycle support, and MIL-qualified packaging.
Supply support for 7140SA20PF8 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, RF, and high-performance silicon solutions for communications, computing, and industrial markets.
The IDT7140 product line delivers dual-port SRAMs engineered specifically for MASTER/SLAVE memory expansion architectures-enabling deterministic, high-bandwidth shared memory in real-time embedded systems without external arbitration logic.
FAQ
What is the role of BUSYL and BUSYR on the 7140SA20PF8?
BUSYL and BUSYR are dedicated input pins on the 7140SA20PF8-not outputs-used to externally assert write inhibition on the left or right port. When pulled low (with external pull-up resistors per datasheet Note 2), they block writes to the corresponding port, preventing data corruption during address contention. This behavior distinguishes the 7140SA20PF8 as a SLAVE device in MASTER/SLAVE configurations with IDT7130.
Can the 7140SA20PF8 operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7140SA20PF8 can function as a standalone dual-port SRAM, supporting independent asynchronous reads/writes on left and right ports. However, it lacks on-chip arbitration logic and BUSY output capability-features present only in the MASTER IDT7130. For systems requiring automatic conflict resolution, pairing with IDT7130SA20PF8 is necessary; otherwise, external arbitration must be implemented.
What is the significance of the 'PF8' suffix in 7140SA20PF8?
The 'PF8' suffix denotes the 48-pin ceramic flatpack (FP48) package variant with military-grade hermetic sealing and thermal characteristics compliant with MIL-PRF-38535 QML. It specifies mechanical form factor, lead finish (8 = gold-plated leads), and environmental qualification-distinct from plastic DIP (PDG48), LCC (LC48), or surface-mount TQFP variants.
Does the 7140SA20PF8 support battery backup data retention?
No, the 7140SA20PF8 does not support battery backup data retention. That feature is exclusive to LA-grade variants (e.g., 7140LA20PF8), which guarantee data retention down to 2.0 V with typical ICCDR ≤ 100 µA. The 'SA' in 7140SA20PF8 indicates standard active-power performance (550 mW typical active, 5 mW standby) without low-voltage retention circuitry.
How does interrupt handling work between ports on the 7140SA20PF8?
The 7140SA20PF8 supports port-to-port interrupts via INTL (pin 6) and INTR (pin 21), which are open-drain outputs. Writing to specific address locations (e.g., A0L–A9L = 3FEh) sets the opposite port's interrupt flag; reading clears it. This enables handshake protocols-such as "data ready" signaling-without CPU polling, reducing latency in tightly coupled dual-processor systems using the 7140SA20PF8.
7140SA20PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- 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:
- 20ns
- Access Time:
- 20 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)
7140SA20PF8 FAQ
1.How can I place an order for 7140SA20PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140SA20PF8 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 7140SA20PF8 reliable?
The price and inventory of 7140SA20PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140SA20PF8 is usually 5 days.
3.What payment methods are accepted for 7140SA20PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140SA20PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140SA20PF8?
7140SA20PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140SA20PF8 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 7140SA20PF8?
For technical support, including 7140SA20PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140SA20PF8 requirements.
6.How does Aetrix verify that 7140SA20PF8 is sourced from the original manufacturer or authorized distributors?
All 7140SA20PF8 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 7140SA20PF8 meets industry standards.
7.What is the process for return or replacement of 7140SA20PF8?
All 7140SA20PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7140SA20PF8, 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 7140SA20PF8 part is unused and in its original packaging.
Return procedure for 7140SA20PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140SA20PF8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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