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Renesas 7140SA20PF
- Part No.:
- 7140SA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140SA20PF.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,431
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Product details
Overview
7140SA20PF from IDT (Integrated Device Technology) 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 arbitration logic.
For engineers reviewing the 7140SA20PF datasheet, 7140SA20PF pinout, 7140SA20PF application, or 7140SA20PF equivalent, key selection considerations include BUSY input behavior (not output), R/W-controlled vs. CE-controlled write timing, port-to-port contention resolution via tAPS setup, tBDD delay validation, and compatibility with IDT7130SA20PF as MASTER in shared-bus architectures.
Technical Context
The 7140SA20PF implements independent left and right ports with separate address (A0L–A9L / A0R–A9R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CEL/OEL/R/WL and CER/OER/R/WR). BUSYL and BUSYR are dedicated inputs - not outputs - used to inhibit writes during port contention, requiring external assertion from a MASTER IDT7130 device.
Arbitration is externally managed: tAPS = 5 ns minimum ensures priority resolution when addresses match; tWB = 0 ns means BUSY assertion occurs immediately upon write initiation on the opposing port; tWDD ≤ 40 ns and tDDD ≤ 30 ns define worst-case propagation delays for data visibility after write completion. No on-chip arbitration logic is present - unlike the IDT7130.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1K × 8 (1024 words × 8 bits), dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time (tRC) | 20 ns - defines minimum interval between successive reads on same port |
| Address Access Time (tAA) | 20 ns - time from stable address to valid data at outputs (OE-enabled) |
| Chip Enable Access (tACE) | 20 ns - time from CE assertion to valid data, critical for burst or pipelined access |
| Active Power (ICC) | 110 mA typ. - corresponds to ~550 mW at 5V, enabling high-speed operation without thermal derating |
| Standby Current (ISB1) | 30 mA typ. - TTL-level standby with both CE pins high; supports low-power idle states |
| Input Leakage (|ILI|) | 10 µA max. - ensures reliable logic-level recognition across industrial temperature range |
Pinout & Package
7140SA20PF is packaged in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with through-hole mounting and hermetic sealing suitable for industrial and military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | All GND pins must be connected to system ground plane for noise immunity and signal integrity |
| VCC | Power supply | Single 5V ±10% supply; all VCC pins require local 0.1 µF decoupling to suppress switching noise |
| CEL, CER | Chip enable (left/right) | Active-low enables; deassertion places respective port in high-impedance or standby mode |
| OEL, OER | Output enable (left/right) | Active-low controls I/O bus drivers; high-Z state prevents bus contention during multi-port sharing |
| R/WL, R/WR | Read/write direction (left/right) | High = read, low = write; determines data flow direction independently per port |
| BUSYL, BUSYR | Bus busy input (left/right) | Open-drain inputs driven LOW by MASTER IDT7130 to block writes during address contention |
| INTL, INTR | Interrupt flag (left/right) | Open-drain outputs signaling inter-port communication events; require pull-up resistors |
| A0L–A9L, A0R–A9R | Address inputs (left/right) | 10-bit address buses selecting one of 1024 memory locations per port |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data paths; direction controlled by R/W and OE signals per port |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only dual-port architecture | Eliminates need for internal arbitration logic, reducing complexity and power vs. MASTER devices |
| BUSY input synchronization | Enables deterministic port-to-port write blocking with 5 ns tAPS setup, preventing data corruption |
| Asynchronous dual-port operation | Allows independent, unsynchronized read/write cycles on left and right ports - no clock required |
| TTL-compatible interface | Direct connection to legacy 5V microcontrollers, FPGAs, and ASICs without level-shifting |
| Industrial temperature support | Guaranteed operation from –40°C to +85°C with validated DC/AC specs across full range |
Applications
| Real-Time Data Buffering | Shared-Memory Interprocessor Communication |
|---|---|
|
Use Scenario: Two independent processors (e.g., DSP + MCU) concurrently access shared sensor data buffers without software coordination. IC Role / Device Role / Timing Role: 7140SA20PF acts as SLAVE memory in a MASTER/SLAVE pair with IDT7130, providing contention-free dual-port access with hardware arbitration. Use Value: Eliminates polling or semaphores; tBDD ≤ 25 ns ensures rapid resolution of simultaneous access attempts. |
Use Scenario: FPGA-based motion controller reads trajectory data while a safety monitor writes fault logs to same memory space. IC Role / Device Role / Timing Role: 7140SA20PF serves as SLAVE port for safety-critical write path, with BUSY inputs synchronized to MASTER's arbitration logic. Use Value: Prevents overwrites during concurrent access; tWDD ≤ 40 ns guarantees timely visibility of updated safety flags. |
| Legacy System Memory Expansion | Test Equipment Pattern Memory |
|
Use Scenario: Upgrading 8-bit microcontroller systems to 16-bit data width using IDT7130 (MASTER) + 7140SA20PF (SLAVE) configuration. IC Role / Device Role / Timing Role: 7140SA20PF provides second 8-bit lane in parallel with MASTER, doubling effective word width without added glue logic. Use Value: Achieves full-speed 16-bit operation - no wait states or timing penalties - due to matched 20 ns access specs. |
Use Scenario: Automated test equipment stores high-speed digital stimulus/response patterns for semiconductor wafer probing. IC Role / Device Role / Timing Role: 7140SA20PF functions as pattern buffer with left port feeding ATE sequencer and right port capturing DUT responses. Use Value: 20 ns tRC enables ≥50 MHz pattern rates; ISB1 ≤ 30 mA supports low-power idle between test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-20VXI | Single-port SRAM with external bus controller; no native BUSY arbitration or SLAVE mode | Requires discrete logic for dual-port emulation; higher BOM count and layout complexity | Select only if existing design uses Cypress ecosystem and can absorb added control overhead |
| IDT7130SA20PF | MASTER device with on-chip arbitration, BUSY outputs, and INT generation - not pin-compatible | Cannot substitute directly; serves complementary role in same system as 7140SA20PF | Use only as paired MASTER in new 16-bit+ memory designs; not a drop-in replacement |
Compared with CY7C131-20VXI and IDT7130SA20PF, the 7140SA20PF uniquely delivers verified SLAVE functionality with guaranteed tAPS/tBDD timing, enabling simpler, lower-power dual-port systems without external arbitration ICs or firmware coordination.
Availability
7140SA20PF is available at Aetrix Electronics and suitable for real-time data buffering, interprocessor communication, legacy system memory expansion, and automated test equipment requiring stable component supply with long-term industrial-grade availability.
Supply support for 7140SA20PF 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 high-performance memory, timing, and interface solutions, now part of Renesas Electronics.
The IDT7130/7140 family was designed specifically for deterministic dual-port memory expansion in industrial control, avionics, and test instrumentation where hardware-arbitrated concurrent access is mandatory.
FAQ
What is the function of BUSYL and BUSYR on the 7140SA20PF?
BUSYL and BUSYR are dedicated input terminals - not outputs - that must be driven LOW by an external MASTER device (e.g., IDT7130SA20PF) to inhibit writes on the corresponding port during address contention. They are open-drain and require pull-up resistors. The 7140SA20PF itself does not generate BUSY signals.
Can the 7140SA20PF operate as a standalone dual-port RAM without a MASTER device?
No. The 7140SA20PF is explicitly designed as a SLAVE device and lacks on-chip arbitration logic, BUSY output capability, and interrupt generation circuitry. It requires pairing with an IDT7130-series MASTER to resolve port contention and manage inter-port communication - operating alone risks undetected data corruption.
What is the significance of tAPS = 5 ns in 7140SA20PF timing?
tAPS (Arbitration Priority Set-up Time) is the minimum time the MASTER must assert matching addresses on both ports before enabling CE to ensure deterministic BUSY assertion. At 5 ns, it guarantees the 7140SA20PF will correctly recognize which port wins arbitration - critical for predictable real-time response in control systems using the 7140SA20PF.
Does the 7140SA20PF support battery backup or data retention below 5V?
No. Battery backup and 2V data retention are exclusive to LA-suffix variants (e.g., 7140LA20PF). The 7140SA20PF is the standard-power version with active current of 110 mA typ. and no sub-5V retention specification - it requires continuous 5V ±10% supply for reliable operation.
Which package types are available for the 7140SA20PF, and is FP48 the only option for this speed grade?
The 7140SA20PF is specified and qualified only in the 48-pin ceramic flatpack (FP48) package, as confirmed by IDT's ordering information and timing validation. While other variants (e.g., 7140SA25PF) appear in PLCC or TQFP, the 20 ns speed grade is exclusively offered in FP48 to meet stringent AC performance and thermal requirements.
7140SA20PF 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:
- 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)
7140SA20PF FAQ
1.How can I place an order for 7140SA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140SA20PF 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 7140SA20PF reliable?
The price and inventory of 7140SA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140SA20PF is usually 5 days.
3.What payment methods are accepted for 7140SA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140SA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140SA20PF?
7140SA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140SA20PF 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 7140SA20PF?
For technical support, including 7140SA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140SA20PF requirements.
6.How does Aetrix verify that 7140SA20PF is sourced from the original manufacturer or authorized distributors?
All 7140SA20PF 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 7140SA20PF meets industry standards.
7.What is the process for return or replacement of 7140SA20PF?
All 7140SA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7140SA20PF, 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 7140SA20PF part is unused and in its original packaging.
Return procedure for 7140SA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140SA20PF Tags
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