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Renesas 7140LA20PF
- Part No.:
- 7140LA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140LA20PF.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,449
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Product details
Overview
7140LA20PF 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% supply, and 1 µA full-standby current (CMOS-level CE). It enables error-free 16-bit-or-wider memory systems without external arbitration logic in industrial communications controllers.
For engineers reviewing the 7140LA20PF datasheet, 7140LA20PF pinout, 7140LA20PF application, or 7140LA20PF equivalent, this page delivers verified timing parameters, BUSY input behavior, battery-backed data retention at 2V, industrial temperature support (–40°C to +85°C), and precise pin-function mapping for PCB layout and port-to-port synchronization design.
Technical Context
The 7140LA20PF operates as a SLAVE dual-port SRAM with dedicated BUSY inputs (BUSYL, BUSYR) that inhibit writes when asserted low - unlike the MASTER IDT7130 which drives open-drain BUSY outputs. Its arbitration relies entirely on external MASTER control, eliminating on-chip arbitration logic.
It supports independent R/WL/R/WR-controlled read/write cycles per port, features INTL/INTR flags for inter-port signaling, and retains data at 2V with ≤100 µA ICCDR (MIL/IND grade), confirmed in Table 07. All AC timing (tRC = 20 ns, tAA = 20 ns, tACE = 20 ns) applies strictly to commercial-grade operation per Table 09a.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1K × 8 bits (1024 words × 8-bit wide), dual independent ports |
| Access Time (tRC) | 20 ns max - defines minimum read cycle interval for full-speed operation |
| Supply Voltage | 4.5 V to 5.5 V - single TTL-compatible rail; no level-shifting required |
| Full Standby Current | 0.2 µA typ. (ISB3, CMOS-level CE) - enables ultra-low-power battery backup mode |
| Data Retention Voltage | 2.0 V min - maintains stored data during main power loss (LA-only feature) |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded systems |
| Package | 48-pin Flatpack (FP48) - hermetically sealed, 0.75″ × 0.75″ × 0.11″ body |
Pinout & Package
48-pin ceramic flatpack (FP48) package with 0.050″ lead pitch; body dimensions 0.75 in × 0.75 in × 0.11 in. 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, 26) | Power supply | Dual VCC pins ensure stable core voltage under high-speed switching |
| CEL / CER | Chip enable (left/right) | Active-low enables port access; controls ISB1/ISB2 standby current states |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; high-Z when disabled (tHZ ≤ 10 ns) |
| R/WL / R/WR | Read/write direction (left/right) | High = read, low = write; determines I/O driver direction per port |
| BUSYL / BUSYR | Busy input (left/right) | SLAVE-only function: low = write inhibited; requires pull-up per Note 2 |
| INTL / INTR | Interrupt flag (left/right) | Open-drain output; signals inter-port event (e.g., address 3FE/3FF write) |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit address bus per port; supports full 1K address space independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data bus per port; high-Z when OE/CE inactive |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input interface | Eliminates need for external arbitration logic when paired with IDT7130 MASTER |
| 2V data retention | Preserves memory contents during brown-out or backup-battery operation (LA variant only) |
| 0.2 µA full-standby current | Enables >1-year battery life in maintenance-free industrial monitoring nodes |
| 20 ns read cycle (tRC) | Supports 50 MHz sustained memory throughput in real-time control loops |
| Industrial temperature range | Validated operation from –40°C to +85°C without derating |
Applications
| Motor Control System | Industrial PLC Backplane |
|---|---|
Use Scenario: Real-time coordination between motion controller (left port) and safety monitor (right port) sharing status registers. IC Role / Device Role / Timing Role: SLAVE dual-port SRAM providing atomic read-modify-write access to shared fault registers via BUSY-synchronized writes. Use Value: Prevents race conditions during simultaneous access; eliminates FPGA-based arbitration logic. | Use Scenario: Backplane memory for modular I/O chassis where CPU module (left port) and fieldbus module (right port) exchange cyclic process data. IC Role / Device Role / Timing Role: SLAVE buffer enabling deterministic 20 ns latency reads for scan-cycle synchronization. Use Value: Guarantees sub-microsecond inter-module data handoff without software overhead. |
| Avionics Data Logger | Medical Imaging Subsystem |
Use Scenario: Capturing sensor telemetry (left port) while simultaneously streaming to non-volatile storage (right port) under DO-254 constraints. IC Role / Device Role / Timing Role: SLAVE memory with 2V retention preserving last valid frame during power interruption. Use Value: Meets ED-12B crash-data preservation requirements without supplemental circuitry. | Use Scenario: DICOM image buffer in ultrasound front-end where beamformer (left port) writes raw RF data and DSP engine (right port) reads for real-time beamforming. IC Role / Device Role / Timing Role: Dual-port SRAM decoupling high-speed acquisition from compute-bound processing. Use Value: Enables continuous 12-bit/40 MSPS acquisition without FIFO overflow or dropped frames. |
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-20AXC | 5V, 1K × 16, 20 ns, TQFP-64; no BUSY input - uses semaphore register arbitration | Requires firmware-managed semaphores instead of hardware BUSY handshake | Choose when system already implements register-based coherency and board space permits larger TQFP |
| AS7C31026B-20TIN | 3.3V only, 1K × 16, 20 ns, TSSOP-48; no BUSY/INT signals; no 2V retention | Lacks hardware port arbitration and battery backup - unsuitable for MASTER/SLAVE expansion | Choose only for new 3.3V designs without legacy 5V interfaces or retention needs |
Compared with CY7C1352V-20AXC and AS7C31026B-20TIN, the 7140LA20PF uniquely provides hardware BUSY-input arbitration and 2V data retention in a 48-pin 5V-compatible flatpack - critical for drop-in replacement in MIL-STD-1553 or industrial backplane upgrades.
Availability
7140LA20PF is available at Aetrix Electronics and suitable for industrial motor control systems, avionics data loggers, medical imaging subsystems, and programmable logic controller backplanes requiring stable component supply across extended product lifecycles.
Supply support for 7140LA20PF 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.
The IDT7140 family was designed specifically for high-reliability dual-port memory expansion in military, industrial, and aerospace systems - emphasizing hardware arbitration, low-power retention, and extended temperature operation.
FAQ
What is the maximum operating frequency supported by the 7140LA20PF?
The 7140LA20PF does not specify a clock frequency; it is an asynchronous SRAM. Its speed is defined by timing parameters: 20 ns maximum read cycle time (tRC), 20 ns address access time (tAA), and 20 ns chip enable access time (tACE). These allow sustained effective throughput up to 50 MHz in tightly controlled systems, but no internal clock or PLL is present in the 7140LA20PF.
Does the 7140LA20PF include on-chip arbitration logic?
No, the 7140LA20PF is a SLAVE-only device and contains no on-chip arbitration logic. Arbitration is handled externally by a MASTER IDT7130, which drives BUSY outputs that connect to the 7140LA20PF's BUSY inputs (BUSYL/BUSYR). The 7140LA20PF asserts no BUSY signals - it only responds to them by inhibiting writes.
Can the 7140LA20PF operate with a 3.3V supply?
No, the 7140LA20PF is specified exclusively for 5V ±10% operation (4.5 V to 5.5 V). Its DC characteristics - including VIH (2.2 V min), VOL (0.4 V max), and ICC - are validated only within this range. Using 3.3V violates the Recommended Operating Conditions in Table 02 and risks functional failure or accelerated wear.
What is the purpose of the INTL and INTR pins on the 7140LA20PF?
The INTL and INTR pins are open-drain interrupt flags used for port-to-port communication. Writing to address 3FEH sets the corresponding INT flag (e.g., left port write to 3FEH asserts INTL); writing to 3FFH clears it. This enables lock-free signaling between processors or controllers accessing separate ports of the 7140LA20PF without shared memory polling.
Is the 7140LA20PF pin-compatible with the IDT7130 series?
No, the 7140LA20PF is not pin-compatible with the IDT7130 MASTER. While both share identical FP48 pinouts and signal names, their BUSY pin functions differ fundamentally: IDT7130 drives BUSY as open-drain outputs, whereas 7140LA20PF receives BUSY as inputs. Swapping them without redesigning the BUSY net routing will cause functional failure.
7140LA20PF 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)
7140LA20PF FAQ
1.How can I place an order for 7140LA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140LA20PF 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 7140LA20PF reliable?
The price and inventory of 7140LA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140LA20PF is usually 5 days.
3.What payment methods are accepted for 7140LA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140LA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140LA20PF?
7140LA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140LA20PF 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 7140LA20PF?
For technical support, including 7140LA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140LA20PF requirements.
6.How does Aetrix verify that 7140LA20PF is sourced from the original manufacturer or authorized distributors?
All 7140LA20PF 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 7140LA20PF meets industry standards.
7.What is the process for return or replacement of 7140LA20PF?
All 7140LA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7140LA20PF, 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 7140LA20PF part is unused and in its original packaging.
Return procedure for 7140LA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140LA20PF Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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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
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