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Renesas 7140LA20PF8
- Part No.:
- 7140LA20PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140LA20PF8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,030
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Product details
Overview
7140LA20PF8 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 maximum read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory systems without external arbitration logic in real-time control applications.
For engineers reviewing the 7140LA20PF8 datasheet, 7140LA20PF8 pinout, 7140LA20PF8 application, or 7140LA20PF8 equivalent, this page delivers verified timing parameters, BUSY input behavior, low-power standby current (1 µA typical), and package-specific pin mapping for the 48-pin ceramic flatpack (PF8) variant.
Technical Context
The 7140LA20PF8 operates as a SLAVE dual-port SRAM with dedicated BUSY input pins (BUSYL, BUSYR) that inhibit writes when asserted low - unlike the MASTER IDT7130 which drives open-drain BUSY outputs. Its arbitration relies on external MASTER coordination, not on-chip logic.
It supports independent TTL-compatible 5V ±10% operation per port, battery backup data retention at 2V (LA version only), and features CMOS-based low-power design: 550 mW active power (typ.), 1 mW standby (typ.), and full standby current of just 0.2 µA under CMOS-level CE disable conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact dual-access buffer storage |
| Access Time | 20 ns max read cycle time - guarantees deterministic latency for real-time interrupt handling |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic rails without level-shifting |
| Data Retention | 2.0 V minimum - supports battery-backed operation during main power loss |
| Standby Current | 1 mW typical (≈200 µA at 5 V) - enables ultra-low-power hold mode in portable systems |
| Operating Temp | –40°C to +85°C - qualified for industrial embedded control environments |
| Package | 48-pin ceramic flatpack (PF8) - hermetically sealed, high-reliability packaging for harsh environments |
Pinout & Package
48-pin ceramic flatpack (PF8) with 0.75″ × 0.75″ body size and side-brazed leads. Pin 1 index corner marked; all VCC pins require direct connection to 5V supply, all GND pins to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24, 25, 48) | Ground reference | Four dedicated ground connections reduce noise coupling between ports |
| VCC (Pins 23, 47) | Power supply | Dual VCC pins ensure stable voltage delivery across high-speed switching activity |
| CEL / CER | Chip enable (left/right) | Independent port activation - enables selective power-down of unused port |
| OEL / OER | Output enable (left/right) | Controls I/O bus direction per port; high-Z when disabled |
| R/WL / R/WR | Read/write control (left/right) | Active-high write signal - synchronous with CE for reliable write strobing |
| BUSYL / BUSYR | BUSY input (left/right) | SLAVE-only inputs - low assertion blocks writes to corresponding port during contention |
| INTL / INTR | Interrupt flag (left/right) | Open-drain outputs - require external pull-up; indicate inter-port communication events |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit address buses - support full 1K memory addressing per port |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data paths - electrically isolated between ports |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input architecture | Eliminates need for external arbitration logic when paired with IDT7130 MASTER |
| 2V data retention (LA version) | Enables nonvolatile memory hold using coin-cell backup without external circuitry |
| 1 µA full-standby current (ISB3) | Reduces system-level power budget in always-on monitoring applications |
| Industrial temperature qualification | Validated operation from –40°C to +85°C - suitable for motor drives and PLCs |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers and FPGAs without level translation |
Applications
| Real-Time Motion Control | Industrial PLC Data Buffering |
|---|---|
Use Scenario: Coordinating simultaneous encoder feedback (Port A) and servo command output (Port B) in CNC motion controllers. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing time-critical data exchange between FPGA and MCU without CPU intervention. Use Value: 20 ns access ensures sub-microsecond response to position error interrupts, preventing servo instability. | Use Scenario: Storing I/O scan data in programmable logic controllers where ladder logic execution and HMI updates occur concurrently. IC Role / Device Role / Timing Role: Dual-access buffer decoupling scan cycle processing (Port A) from HMI refresh (Port B). Use Value: Independent port arbitration prevents data corruption during simultaneous read/write, eliminating software locking overhead. |
| Avionics Sensor Fusion | Medical Imaging Frame Buffer |
Use Scenario: Aggregating inertial measurement unit (IMU) and GPS timestamps in airborne navigation systems requiring MIL-PRF-38535 compliance. IC Role / Device Role / Timing Role: Hermetic PF8-packaged SLAVE RAM interfacing with radiation-tolerant processor and sensor ASICs. Use Value: Ceramic flatpack construction and –55°C to +125°C military-grade option ensure reliability in altitude-varying thermal environments. | Use Scenario: Holding uncompressed ultrasound frame data during parallel acquisition and display rendering in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-power LA variant providing battery-backed frame storage during AC power interruption. Use Value: 2V data retention preserves last acquired image for diagnostics even after main power loss. |
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 | 5V, 1K × 16, 20 ns, TQFP-64; no built-in BUSY arbitration; requires external logic for MASTER/SLAVE sync | Supports wider data bus natively but lacks integrated contention resolution - increases PCB complexity | Select when 16-bit native width is required and external arbitration is acceptable |
| IDT7130LA20PF8 | Same package, same speed grade, but MASTER variant with on-chip arbitration logic and open-drain BUSY outputs | Enables standalone dual-port use or MASTER role in expansion; cannot be substituted directly as SLAVE | Choose only when replacing MASTER function or building single-device systems |
Compared with CY7C024AV-20AXC and IDT7130LA20PF8, the 7140LA20PF8 uniquely provides SLAVE-specific BUSY input behavior and 2V data retention in a 48-pin ceramic package - optimizing for minimal external components and battery-backed reliability in space-constrained industrial designs.
Availability
7140LA20PF8 is available at Aetrix Electronics and suitable for real-time motion control, industrial PLC data buffering, avionics sensor fusion, and medical imaging frame buffer applications requiring stable component supply across extended product lifecycles.
Supply support for 7140LA20PF8 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 timing, memory, and interface solutions, now part of Renesas Electronics.
The IDT7140 family was designed specifically as SLAVE dual-port SRAMs to pair with IDT7130 MASTER devices, enabling scalable, pin-compatible memory expansion in deterministic real-time systems.
FAQ
What is the primary functional distinction between 7140LA20PF8 and IDT7130LA20PF8?
The 7140LA20PF8 is a SLAVE-only dual-port SRAM with BUSY input pins (BUSYL/BUSYR) that must be driven by an external MASTER (e.g., IDT7130LA20PF8), whereas the IDT7130LA20PF8 contains on-chip arbitration logic and drives open-drain BUSY outputs. The 7140LA20PF8 cannot operate standalone and requires coordinated control from a MASTER device to resolve port contention.
Does 7140LA20PF8 support true 2V data retention, and under what conditions?
Yes, the 7140LA20PF8 supports guaranteed 2.0 V minimum data retention voltage per the LA version specification. This applies only when VCC is reduced to 2.0 V while maintaining CE high (≥ VCC − 0.2 V), with ambient temperature at +25°C. Retention current is specified at ≤4000 µA for military grade and ≤1500 µA for commercial grade.
What is the correct termination requirement for BUSYL and BUSYR inputs on 7140LA20PF8?
BUSYL and BUSYR are CMOS logic inputs on the 7140LA20PF8 - not open-drain - and require no external pull-up resistors. They must be driven actively low by the MASTER device (e.g., IDT7130) to inhibit writes. Leaving them unconnected risks metastability; tie to VCC via 10 kΩ if unused, per design guidance in the datasheet.
Can 7140LA20PF8 be used without a MASTER device like IDT7130 in a single-port configuration?
No - the 7140LA20PF8 lacks on-chip arbitration and has no internal mechanism to resolve simultaneous access conflicts. It is architecturally dependent on an external MASTER (IDT7130) to drive its BUSY inputs. Using it without a MASTER risks undetected data corruption during concurrent left/right port access.
Which package variants are available for 7140LA20PF8, and is PF8 the only ceramic option?
The 7140LA20PF8 is specifically the 48-pin ceramic flatpack (PF8) variant. Other package options for the 7140LA20 family include 48-pin DIP (PDG48/SB48), 48-pin LCC (LC48), 52-pin PLCC (PLG52), and 64-pin TQFP/STQFP (PPG64/PNG64), but only PF8 denotes the ceramic flatpack construction with hermetic sealing and MIL-PRF-38535 compliance.
7140LA20PF8 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)
7140LA20PF8 FAQ
1.How can I place an order for 7140LA20PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140LA20PF8 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 7140LA20PF8 reliable?
The price and inventory of 7140LA20PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140LA20PF8 is usually 5 days.
3.What payment methods are accepted for 7140LA20PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140LA20PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140LA20PF8?
7140LA20PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140LA20PF8 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 7140LA20PF8?
For technical support, including 7140LA20PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140LA20PF8 requirements.
6.How does Aetrix verify that 7140LA20PF8 is sourced from the original manufacturer or authorized distributors?
All 7140LA20PF8 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 7140LA20PF8 meets industry standards.
7.What is the process for return or replacement of 7140LA20PF8?
All 7140LA20PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7140LA20PF8, 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 7140LA20PF8 part is unused and in its original packaging.
Return procedure for 7140LA20PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140LA20PF8 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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AT24C08C-STUM-T
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