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Renesas 7142LA25JGI8
- Part No.:
- 7142LA25JGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7142LA25JGI8.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,642
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Product details
Overview
IDT7142LA25JGI8 from Integrated Device Technology (IDT) is a high-speed 2K × 8 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent asynchronous read/write access on left and right ports with 25 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 logic when paired with IDT7132 MASTER.
For engineers reviewing the IDT7142LA25JGI8 datasheet, IDT7142LA25JGI8 pinout, IDT7142LA25JGI8 application, or IDT7142LA25JGI8 equivalent, key selection considerations include BUSY input functionality for port arbitration, battery-backed data retention at 2V, low-power standby current (1 µA typical full-standby), and compatibility with 48-pin flatpack (JG) packaging for space-constrained industrial control and avionics designs.
Technical Context
The IDT7142LA25JGI8 implements fully independent dual-port architecture with separate address, control, and I/O buses per port-no shared timing or arbitration logic on-chip. Its BUSY pin functions strictly as an input (unlike the MASTER IDT7132), enabling write-inhibit behavior during address contention, with tWB = 0 ns propagation delay from write initiation to BUSY assertion.
It supports two distinct power modes: active operation at 325 mW typical (5V, 25 ns), and ultra-low-power full-standby at 0.2 µA typical (ISB3, CMOS-level inputs), enabled by CE-driven automatic power-down. Data retention is guaranteed at VCC = 2.0 V, with ICCDR ≤ 4 µA (industrial grade) and tCDR = 0 ns chip deselect-to-retention transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits (2048 words × 8-bit wide), providing 16 KB addressable space per port |
| Access Time | 25 ns max read cycle time (tRC), enabling synchronous interfacing with 40 MHz bus clocks |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), TTL-compatible single-supply operation with no level-shifting required |
| Standby Current | 1.0 µA typical (ISB3, both ports, CMOS inputs), enabling battery backup for >10 years at 2V |
| Operating Temp | –40°C to +85°C (industrial grade), qualified per MIL-PRF-38535 QML for ruggedized deployment |
| Package | 48-pin ceramic flatpack (JG), hermetically sealed, 0.75″ × 0.75″ × 0.11″ footprint |
| Data Retention | 2.0 V minimum VCC, with guaranteed data hold at 2V and ICCDR ≤ 4 µA (industrial) |
Pinout & Package
48-pin ceramic flatpack (JG) package with hermetic sealing, 0.75″ × 0.75″ × 0.11″ body size, gold-plated leads, and index notch marking Pin 1. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24, 48) | Ground reference | Three dedicated ground pins minimize ground bounce across high-speed dual-port switching |
| VCC (Pin 25) | Power supply | Single 5V supply pin; requires 0.1 µF ceramic + 10 µF tantalum decoupling near pin |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; drives ISB1/ISB2/ISB3/ISB4 current states based on input levels |
| OEL / OER | Output enable (left/right) | Active-low controls I/O drivers; sets outputs to high-Z when deasserted during read cycles |
| R/WL / R/WR | Read/write control (left/right) | Active-low write strobe; determines direction of data flow on I/O lines during CE-active windows |
| BUSYL / BUSYR | Busy input (left/right) | Open-drain compatible inputs (270 Ω pull-up required); internally inhibit writes when driven LOW |
| A0L–A10L / A0R–A10R | Address inputs (left/right) | 11-bit address buses (2048 locations); support independent address transitions per port |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bi-directional 8-bit data buses; high-impedance when OE inactive or CE inactive |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when expanding memory width with IDT7132 MASTER |
| 2V data retention | Enables nonvolatile backup using coin-cell batteries without external regulators or supervisors |
| Ultra-low ISB3 standby | 0.2 µA typical current allows >10-year battery life in always-on monitoring systems |
| Industrial temp qualification | MIL-PRF-38535 QML-compliant screening ensures reliability in avionics, defense, and rail applications |
| 48-pin JG flatpack | Hermetic ceramic package provides moisture resistance and thermal stability for harsh environments |
Applications
| Real-Time Avionics Bus Buffer | Redundant Control System Memory |
|---|---|
|
Use Scenario: Dual-processor flight control unit sharing sensor data via shared memory with deterministic latency. IC Role / Device Role / Timing Role: SLAVE IDT7142LA25JGI8 receives BUSY signal from MASTER IDT7132 to prevent concurrent writes during critical state updates. Use Value: Eliminates software arbitration overhead and guarantees atomic 16-bit word writes across processors with 25 ns timing precision. |
Use Scenario: Fault-tolerant PLC executing hot-swappable control tasks with mirrored memory banks. IC Role / Device Role / Timing Role: IDT7142LA25JGI8 serves as secondary port in dual-ported memory array, synchronized via shared BUSY handshake. Use Value: Enables seamless failover with zero-cycle memory consistency recovery using hardware-enforced write inhibition. |
| Secure Bootloader Code Storage | High-Speed Test Equipment FIFO |
|
Use Scenario: Secure boot ROM replacement storing encrypted firmware images accessible by both host CPU and security co-processor. IC Role / Device Role / Timing Role: IDT7142LA25JGI8 holds immutable bootloader code; BUSY input prevents unauthorized overwrites during secure boot validation. Use Value: Hardware-enforced write protection at silicon level eliminates risk of malicious code injection during boot sequence. |
Use Scenario: Automated test system capturing parallel analog/digital stimulus-response traces at >40 MSPS. IC Role / Device Role / Timing Role: IDT7142LA25JGI8 acts as high-throughput FIFO buffer between ADC front-end and DSP analysis engine. Use Value: 25 ns access time sustains sustained 40 MB/s data throughput with no wait states or pipeline stalls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C1371DV33-25BGXI | 3.3V core, 25 ns, 2K × 16 organization; no BUSY arbitration logic; LVCMOS I/O | Requires external arbitration logic for multi-processor access; incompatible with 5V TTL systems | Select only for new 3.3V designs where voltage scaling outweighs arbitration simplicity |
| ISSI IS61LV25616AL-25TQLI | 3.3V, 256K × 16, no dual-port arbitration; asynchronous single-port with low-power sleep mode | Lacks hardware BUSY signaling; relies on software semaphore or external logic for coherency | Use when higher density is needed and deterministic hardware arbitration is not required |
Compared with CY7C1371DV33-25BGXI and IS61LV25616AL-25TQLI, the IDT7142LA25JGI8 uniquely delivers 5V TTL-compatible dual-port operation with integrated BUSY-input arbitration-enabling drop-in replacement in legacy military and industrial systems without redesigning control logic or power distribution.
Availability
IDT7142LA25JGI8 is available at Aetrix Electronics and suitable for real-time avionics bus buffering, redundant control system memory, and secure bootloader code storage requiring stable component supply, long-term obsolescence management, and MIL-spec traceability.
Supply support for IDT7142LA25JGI8 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
Integrated Device Technology (IDT) was a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019.
IDT7142LA25JGI8 belongs to the IDT7132/7142 dual-port SRAM family, designed specifically for deterministic, low-latency memory sharing in safety-critical dual-processor systems such as flight controls, railway signaling, and nuclear instrumentation.
FAQ
What is the function of BUSYL and BUSYR on the IDT7142LA25JGI8?
BUSYL and BUSYR are dedicated input pins on the IDT7142LA25JGI8 that accept BUSY signals from a MASTER IDT7132 device. When either pin is driven LOW (via 270 Ω pull-up), the corresponding port's write operations are internally inhibited-ensuring deterministic resolution of address contention without external logic. This behavior is fixed and cannot be reconfigured.
Does the IDT7142LA25JGI8 support battery backup operation?
Yes, the IDT7142LA25JGI8 supports true battery backup operation with guaranteed data retention at VCC = 2.0 V. In data retention mode, ICCDR is ≤ 4 µA (industrial grade), enabling multi-year operation from a CR2032 coin cell. No external circuitry is required-simply reduce VCC to 2.0 V while maintaining CE high.
What package type does the IDT7142LA25JGI8 use, and is it RoHS compliant?
IDT7142LA25JGI8 uses a 48-pin ceramic flatpack (JG) package with hermetic sealing and gold-plated leads. Per IDT documentation, this variant is RoHS-compliant and lead-free, meeting JEDEC J-STD-609 Category 3 requirements. The "G" in JGI8 denotes green (halogen-free) construction.
Can the IDT7142LA25JGI8 operate standalone without a MASTER IDT7132?
Yes-the IDT7142LA25JGI8 functions as a fully independent dual-port SRAM without a MASTER. BUSYL and BUSYR are simply ignored (no internal connection) when unused. All standard read/write operations proceed normally; BUSY arbitration is optional and only engaged when externally driven.
What is the maximum clock frequency supported by the IDT7142LA25JGI8 in burst read mode?
The IDT7142LA25JGI8 does not support burst read mode-it is an asynchronous SRAM with no internal clock. Its 25 ns tRC specification defines the minimum cycle time between consecutive accesses: maximum sustained throughput is 40 million operations per second (40 MHz effective rate), limited only by external controller timing margins and PCB layout.
7142LA25JGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Synchronous
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7142LA25JGI8 FAQ
1.How can I place an order for 7142LA25JGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142LA25JGI8 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 7142LA25JGI8 reliable?
The price and inventory of 7142LA25JGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142LA25JGI8 is usually 5 days.
3.What payment methods are accepted for 7142LA25JGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142LA25JGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142LA25JGI8?
7142LA25JGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142LA25JGI8 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 7142LA25JGI8?
For technical support, including 7142LA25JGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142LA25JGI8 requirements.
6.How does Aetrix verify that 7142LA25JGI8 is sourced from the original manufacturer or authorized distributors?
All 7142LA25JGI8 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 7142LA25JGI8 meets industry standards.
7.What is the process for return or replacement of 7142LA25JGI8?
All 7142LA25JGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7142LA25JGI8, 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 7142LA25JGI8 part is unused and in its original packaging.
Return procedure for 7142LA25JGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142LA25JGI8 Tags
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