My Inquiry
My Account
Renesas 7140LA25PFG8
- Part No.:
- 7140LA25PFG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140LA25PFG8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7140LA25PFG8 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 25ns max read cycle time, 1mW standby power, and 2V battery-backed data retention. It enables error-free 16-bit-or-wider memory systems without external arbitration logic in industrial control and real-time DSP applications.
For engineers reviewing the 7140LA25PFG8 datasheet, 7140LA25PFG8 pinout, 7140LA25PFG8 application, or 7140LA25PFG8 equivalent, this page delivers verified electrical specs, port-to-port timing constraints, BUSY input behavior, industrial temperature support (–40°C to +85°C), and direct substitution guidance for legacy dual-port SRAM designs.
Technical Context
The 7140LA25PFG8 operates as a SLAVE in MASTER/SLAVE configurations with IDT7130, accepting BUSY input signals (BUSYL/BUSYR) to inhibit writes during address contention. Its dual independent ports feature separate CE/OE/R/W controls, TTL-compatible 5V ±10% supply, and CMOS-level full-standby mode enabling 0.2mA ISB3 current.
It implements port-to-port arbitration via external BUSY signaling-not on-chip logic-and supports interrupt flag generation (INTL/INTR) for inter-port communication. Battery backup operation is enabled at VCC = 2.0V with guaranteed data retention per MIL-PRF-38535 QML-compliant industrial-grade packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit data bus per port) |
| Access Time | 25ns max read cycle time - ensures deterministic latency in real-time control loops |
| Supply Voltage | 5.0V ±10% - compatible with standard TTL logic families and legacy 5V systems |
| Standby Current | 1mW typical (ISB3 = 0.2mA at CMOS-level inputs) - enables ultra-low-power hold mode during system sleep |
| Data Retention | 2.0V minimum VCC - preserves memory contents during main power loss using backup battery |
| Operating Temp | –40°C to +85°C - qualified for industrial embedded environments without derating |
| Package | 64-pin TQFP (PPG64) - surface-mount footprint with 10mm × 10mm body for high-density PCB layouts |
Pinout & Package
64-pin Thin Quad Flat Package (TQFP), PPG64 variant, with 0.5mm pitch, 10mm × 10mm body, and exposed thermal pad. Pin 1 marked by corner notch; pins arranged in four 16-pin sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access (0–1023) |
| A0R–A9R | Right port address inputs | 10-bit address bus for right-side memory access (0–1023) |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE/CE inactive |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; isolated from left port during concurrent access |
| CEL / CER | Chip enable (left/right) | Active-low enables port logic; drives ISB2/ISB4 standby modes when high |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; sets outputs to high-Z when deasserted |
| R/WL / R/WR | Read/write control (left/right) | High = read, low = write; determines direction of I/O data flow |
| BUSYL / BUSYR | BUSY input (slave-only) | Active-low signals from IDT7130 master to block writes during address conflict |
| INTL / INTR | Interrupt flag (input/output) | Open-drain outputs set/cleared by opposite port's special address writes (3FEh/3FFh) |
| VCC / GND | Power and ground | All VCC pins must be decoupled locally; all GND pins tied to common plane |
Key Features
| Feature | Design Value |
|---|---|
| Slave-only BUSY input interface | Eliminates need for external arbitration logic when paired with IDT7130 master |
| 2V battery data retention | Preserves stored values during main power failure without external circuitry |
| Independent port control | Enables simultaneous read/write operations on left and right ports with no internal bus contention |
| TTL-compatible 5V operation | Direct interfacing with legacy microcontrollers, FPGAs, and ASICs without level shifters |
| Industrial temperature qualification | Guaranteed functionality across –40°C to +85°C ambient without thermal derating |
Applications
| Motor Control System | DSP-Based Signal Processing |
|---|---|
Use Scenario: Real-time servo loop execution where FPGA reads sensor data while MCU writes updated PWM parameters. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized shared memory buffer between FPGA (left port) and MCU (right port), eliminating handshake overhead. Use Value: 25ns access enables sub-microsecond inter-processor data exchange, meeting 100kHz servo update deadlines. | Use Scenario: Audio codec pipeline with separate DMA channels for input sampling and output playback buffers. IC Role / Device Role / Timing Role: Left port serves ADC DMA writes; right port serves DAC DMA reads - both operating concurrently. Use Value: Full asynchronous operation prevents FIFO underflow/overflow, sustaining 192ksps stereo audio without CPU intervention. |
| Redundant PLC Memory Module | Avionics Data Logger |
Use Scenario: Hot-swappable controller module requiring non-volatile state preservation during power transitions. IC Role / Device Role / Timing Role: Stores critical runtime variables; powered by backup battery during main supply interruption. Use Value: 2V data retention guarantees 1024-byte state integrity for ≥10 years at +85°C per JEDEC JESD22-A108. | Use Scenario: Flight data recorder capturing sensor telemetry from multiple buses with deterministic timestamp alignment. IC Role / Device Role / Timing Role: Left port accepts ARINC-429 receiver data; right port feeds time-stamped packets to ARM processor. Use Value: BUSY-controlled arbitration prevents corrupted writes during simultaneous capture and analysis cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1352V-25AXC | 3.3V core, 25ns access, 1K × 16 organization - requires data bus splitting for 8-bit interfaces | Targets modern low-voltage systems; lacks 2V battery retention | Select when migrating to 3.3V infrastructure and wider word width suffices |
| AS7C31026B-25JCIN | Single-port SRAM with external arbitration logic required; 25ns, 1M × 16 - no native BUSY protocol | Suitable only where inter-port coordination is handled in firmware or FPGA | Choose only if redesigning arbitration architecture and needing higher density |
Compared with CY7C1352V-25AXC and AS7C31026B-25JCIN, the 7140LA25PFG8 uniquely provides native slave-mode BUSY input handling, 2V battery retention, and drop-in compatibility with existing IDT7130-based 5V industrial systems - eliminating redesign risk.
Availability
7140LA25PFG8 is available at Aetrix Electronics and suitable for motor control systems, DSP pipelines, redundant PLC modules, and avionics data loggers requiring stable component supply across extended product lifecycles.
Supply support for 7140LA25PFG8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory, and interface solutions for communications, computing, and industrial markets.
The IDT7140 family was designed specifically for MASTER/SLAVE dual-port SRAM expansion in deterministic real-time systems, emphasizing low-latency arbitration, battery-backed reliability, and seamless integration with legacy 5V architectures.
FAQ
What is the function of BUSYL and BUSYR pins on the 7140LA25PFG8?
BUSYL and BUSYR are dedicated input pins on the 7140LA25PFG8 that accept active-low BUSY signals from an IDT7130 master device. When asserted, they internally inhibit write operations to the corresponding port during address contention, ensuring data coherency without external logic. Unlike the IDT7130, the 7140LA25PFG8 does not drive BUSY outputs.
Does the 7140LA25PFG8 support true simultaneous read/write operations on both ports?
Yes, the 7140LA25PFG8 supports fully asynchronous, independent read and write operations on left and right ports. Each port has its own CE/OE/R/W controls and address/data buses. Simultaneous access is permitted unless address contention triggers BUSY input assertion from the master, which then blocks the conflicting write - a hardware-enforced arbitration mechanism.
What is the minimum VCC required to retain data in the 7140LA25PFG8 during power loss?
The 7140LA25PFG8 guarantees data retention down to VCC = 2.0V, as specified in the LA version's data retention characteristics. At this voltage, ICCDR remains ≤4000µA (military/industrial grade), enabling long-term storage using a coin-cell or supercapacitor backup source without additional regulation circuitry.
Can the 7140LA25PFG8 operate without an IDT7130 master device?
Yes, the 7140LA25PFG8 can operate as a standalone dual-port SRAM if BUSYL and BUSYR are held high (via pull-up resistors) and external arbitration is managed in software or FPGA logic. However, its native design intent and timing specifications assume integration with IDT7130 for automatic contention resolution - standalone use forfeits the hardware BUSY arbitration benefit.
What package type does the 7140LA25PFG8 use, and what are its key mechanical dimensions?
The 7140LA25PFG8 uses a 64-pin TQFP package designated PPG64, with 10mm × 10mm body size, 1.4mm height, and 0.5mm lead pitch. It features an exposed thermal pad on the bottom for enhanced heat dissipation and is RoHS-compliant and halogen-free per IDT's green parts program.
7140LA25PFG8 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:
- 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)
7140LA25PFG8 FAQ
1.How can I place an order for 7140LA25PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140LA25PFG8 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 7140LA25PFG8 reliable?
The price and inventory of 7140LA25PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140LA25PFG8 is usually 5 days.
3.What payment methods are accepted for 7140LA25PFG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140LA25PFG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140LA25PFG8?
7140LA25PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140LA25PFG8 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 7140LA25PFG8?
For technical support, including 7140LA25PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140LA25PFG8 requirements.
6.How does Aetrix verify that 7140LA25PFG8 is sourced from the original manufacturer or authorized distributors?
All 7140LA25PFG8 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 7140LA25PFG8 meets industry standards.
7.What is the process for return or replacement of 7140LA25PFG8?
All 7140LA25PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 7140LA25PFG8, 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 7140LA25PFG8 part is unused and in its original packaging.
Return procedure for 7140LA25PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140LA25PFG8 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…
