My Inquiry
My Account
Renesas 7140LA25PFG
- Part No.:
- 7140LA25PFG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140LA25PFG.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,665
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7140LA25PFG from IDT is a 1K × 8 dual-port static RAM configured as a slave device in MASTER/SLAVE memory systems, supporting fully asynchronous left/right port access with 25ns max read cycle time, 1mW typical standby power, and 2V data retention capability. It enables error-free 16-bit-or-wider memory expansion when paired with IDT7130 master SRAM in industrial control and real-time signal processing applications.
For engineers reviewing the 7140LA25PFG datasheet, 7140LA25PFG pinout, 7140LA25PFG application, or 7140LA25PFG equivalent, this page delivers verified timing parameters (tRC = 25ns), BUSY input behavior, battery backup operation, industrial temperature support (–40°C to +85°C), and TQFP-64 package compatibility - all critical for deterministic dual-port arbitration design.
Technical Context
The 7140LA25PFG operates as a SLAVE dual-port SRAM with dedicated BUSY inputs (BUSYL, BUSYR) that inhibit writes during port contention, unlike the MASTER IDT7130 which provides open-drain BUSY outputs. Its arbitration logic responds only to address match events, requiring tAPS ≥ 5ns setup to guarantee deterministic priority resolution.
It supports independent R/W-controlled or CE-controlled write cycles on either port, with tWP = 15ns minimum pulse width and tBDD = 25ns BUSY-disable-to-valid-data delay. The LA variant integrates CMOS-level full-standby mode (ISB3 = 0.2µA typ.) and retains data at VCC = 2.0V, enabling low-power hold states in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), providing compact dual-access buffer space for real-time data exchange between two independent controllers. |
| Access Time | 25ns maximum read cycle time (tRC), enabling synchronization with 40MHz bus clocks in high-speed embedded interfaces. |
| Standby Power | 1mW typical (ISB1), achieved via TTL-level CE-driven shutdown - critical for energy-constrained industrial gateways. |
| Data Retention | 2.0V minimum VCC for data retention (VDR), allowing operation from coin-cell backup without external regulators. |
| Operating Temp | –40°C to +85°C industrial range, qualified for deployment in motor drives and factory automation equipment. |
| Supply Voltage | 4.5V to 5.5V (±10% of 5V), compatible with standard TTL logic rails and legacy 5V system designs. |
| Package | 64-pin TQFP (PPG64), 10mm × 10mm footprint with 0.5mm pitch - suitable for dense PCB layouts requiring thermal reliability. |
Pinout & Package
64-pin Thin Quad Flat Package (TQFP), PPG64 variant, body size 10 mm × 10 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access; decoded internally to select one of 1024 locations. |
| A0R–A9R | Right port address inputs | Independent 10-bit address bus enabling concurrent right-port reads/writes without arbitration delay. |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit tri-state I/O bus; direction controlled by R/WL and OEL - no external transceivers required. |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated 8-bit data path; allows simultaneous left-read/right-write operations on same address. |
| CEL, CER | Chip enable inputs | Active-low enables for respective ports; assertion initiates access, deassertion forces high-Z and reduces ICC to ISB1 level. |
| OEL, OER | Output enable inputs | Control output drivers independently; OEL = L enables left I/Os while CEL = L, decoupling enable timing from chip select. |
| R/WL, R/WR | Read/write direction controls | Set port data flow direction; R/WL = H enables read, L enables write - no separate write-enable pin needed. |
| BUSYL, BUSYR | Busy inputs (SLAVE) | Active-low signals from external MASTER (IDT7130) that block writes to corresponding port during contention. |
| INTL, INTR | Interrupt flag outputs | Open-drain flags indicating inter-port communication events; require external pull-up resistors per datasheet Note 2. |
| VCC, GND | Power supply pins | Four VCC (pins 33, 47, 48, 64) and four GND (pins 32, 46, 62, 63) ensure low-impedance distribution and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input interface | Eliminates need for external arbitration logic when used with IDT7130 MASTER, reducing BOM count and layout complexity in 16-bit memory expansion. |
| 2V data retention (LA variant) | Enables seamless transition to battery backup mode without data loss during main power interruption - validated at TA = +25°C. |
| Industrial temperature qualification | Guaranteed operation from –40°C to +85°C across all AC/DC parameters, supporting deployment in uncontrolled ambient environments. |
| Asynchronous dual-port architecture | Permits independent, unsynchronized access from two controllers - essential for real-time DSP co-processing and FPGA-CPU memory sharing. |
| TTL-compatible 5V operation | Direct interface with legacy microcontrollers and FPGAs without level-shifting, simplifying integration into existing 5V system designs. |
Applications
| Motor Control Feedback Buffer | DSP-FPGA Shared Memory |
|---|---|
Use Scenario: Real-time capture of encoder position and current sensor data from dual-axis servo drives, where CPU and motion controller access shared status registers concurrently. IC Role / Device Role / Timing Role: SLAVE dual-port SRAM providing non-blocking read/write paths; BUSY inputs prevent write collisions during simultaneous updates. Use Value: Eliminates software polling delays and guarantees deterministic 25ns memory access for sub-microsecond control loop execution. | Use Scenario: High-throughput data streaming between Xilinx FPGA-based signal acquisition and ARM Cortex-M7 processor performing FFT analysis. IC Role / Device Role / Timing Role: Asynchronous memory bridge enabling parallel data ingestion and processing without FIFO bottlenecks or clock domain crossing logic. Use Value: Sustains 40MB/s effective bandwidth (1024×8 @ 40MHz) with zero wait states, accelerating spectral analysis latency by >3× vs. single-port alternatives. |
| Redundant PLC I/O Mapping | Battery-Backed Configuration Storage |
Use Scenario: Storing I/O state tables in safety-critical programmable logic controllers where primary and backup CPUs must maintain synchronized register images. IC Role / Device Role / Timing Role: Dual-port SRAM acting as coherent memory mirror; INTL/INTR flags coordinate state change notifications between redundant cores. Use Value: Ensures <100ns inter-core notification latency and eliminates race conditions during hot-switchover sequences. | Use Scenario: Preserving calibration coefficients and operational history in smart meters during mains power failure. IC Role / Device Role / Timing Role: LA variant operating in data retention mode at 2.0V from CR2032 cell; maintains integrity for >10 years at room temperature. Use Value: Removes need for external NVSRAM or EEPROM, cutting bill-of-materials cost by 35% while improving write endurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1354V25 | 3.3V core supply, 25ns access, 1K × 16 organization - requires no external data-width expansion logic but incompatible with 5V systems. | Targeted at modern low-voltage FPGA platforms; lacks 2V data retention and industrial temp grade. | Select when migrating to 3.3V infrastructure and requiring native 16-bit width without MASTER/SLAVE pairing. |
| IDT7132LA25PFG | Same manufacturer, 2K × 8 capacity, identical 25ns timing and LA power profile - pinout differs due to larger address bus (A0–A10). | Used where deeper buffer depth is needed (e.g., video frame buffering), but requires PCB redesign for A10 routing and additional address decode. | Choose for capacity upgrade within same thermal/power envelope and qualification baseline - verify TQFP-64 mechanical compatibility. |
Compared with CY7C1354V25 and IDT7132LA25PFG, the 7140LA25PFG uniquely delivers 5V TTL compatibility, MASTER/SLAVE expandability, and guaranteed 2V data retention - making it irreplaceable in legacy industrial systems requiring drop-in 5V dual-port memory with battery backup.
Availability
7140LA25PFG is available at Aetrix Electronics and suitable for motor control feedback buffers, DSP-FPGA shared memory, redundant PLC I/O mapping, and battery-backed configuration storage requiring stable component supply across extended production lifecycles.
Supply support for 7140LA25PFG 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, now part of Renesas Electronics since 2019.
The IDT7140 product line delivers dual-port SRAMs optimized for deterministic real-time systems, emphasizing low-latency arbitration, industrial reliability, and seamless MASTER/SLAVE scalability in 5V environments.
FAQ
What is the maximum operating temperature range for the 7140LA25PFG?
The 7140LA25PFG is rated for industrial temperature operation from –40°C to +85°C, with all AC and DC electrical characteristics guaranteed across this full range. This qualification enables use in factory automation, motor drives, and outdoor industrial equipment without derating.
Does the 7140LA25PFG support true dual-port simultaneous access without arbitration overhead?
Yes, the 7140LA25PFG permits fully asynchronous reads and writes on left and right ports simultaneously - provided addresses do not conflict. When contention occurs, BUSY inputs (driven by an external IDT7130 MASTER) enforce deterministic arbitration with tAPS = 5ns setup, eliminating software intervention.
How does the 2V data retention feature work in the 7140LA25PFG?
The 7140LA25PFG enters data retention mode when VCC drops to 2.0V, drawing only 100µA typical (ICCDR). This state preserves memory contents indefinitely as long as voltage remains ≥2.0V - validated per datasheet Table 7 and used in smart meter backup applications.
Can the 7140LA25PFG be used without an IDT7130 MASTER device?
Yes, the 7140LA25PFG functions as a standalone dual-port SRAM with independent left/right port control. However, its BUSY inputs remain unconnected or tied high, disabling contention detection - appropriate for applications with externally managed access scheduling.
What package type is used for the 7140LA25PFG and what are its key mechanical attributes?
The 7140LA25PFG uses a 64-pin TQFP (PPG64) package measuring 10 mm × 10 mm × 1.4 mm with 0.5 mm lead pitch. Its four VCC and four GND pins provide robust power delivery, and the matte tin finish ensures reliable solder joint formation in automated assembly.
7140LA25PFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- 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)
7140LA25PFG FAQ
1.How can I place an order for 7140LA25PFG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140LA25PFG 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 7140LA25PFG reliable?
The price and inventory of 7140LA25PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140LA25PFG is usually 5 days.
3.What payment methods are accepted for 7140LA25PFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140LA25PFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140LA25PFG?
7140LA25PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140LA25PFG 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 7140LA25PFG?
For technical support, including 7140LA25PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140LA25PFG requirements.
6.How does Aetrix verify that 7140LA25PFG is sourced from the original manufacturer or authorized distributors?
All 7140LA25PFG 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 7140LA25PFG meets industry standards.
7.What is the process for return or replacement of 7140LA25PFG?
All 7140LA25PFG units undergo pre-shipment inspection (PSI). If there is an issue with 7140LA25PFG, 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 7140LA25PFG part is unused and in its original packaging.
Return procedure for 7140LA25PFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140LA25PFG 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…
