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Renesas 7142LA25J
- Part No.:
- 7142LA25J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7142LA25J.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,380
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Product details
Overview
IDT7142LA25J 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 maximum read cycle time, 2.0 V data retention capability, and industrial temperature operation (–40°C to +85°C). It serves as a width-expansion slave in 16-bit-or-wider memory subsystems for real-time digital signal processors and military-grade avionics interfaces.
For engineers reviewing the IDT7142LA25J datasheet, IDT7142LA25J pinout, IDT7142LA25J application, or IDT7142LA25J equivalent, key selection considerations include its BUSY input functionality (not output), battery-backed 2V data retention, 48-pin flatpack/LCC/DIP package compatibility, and strict timing coordination requirements with IDT7132 master devices in contention-aware dual-port architectures.
Technical Context
The IDT7142LA25J implements a fully independent dual-port SRAM architecture with separate address, control, and I/O buses per port, enabling concurrent access without arbitration logic on-chip - unlike the IDT7132 master, which contains internal arbitration and BUSY output generation. Its BUSY pins (BUSYL, BUSYR) are dedicated inputs that gate write operations when asserted low by an external IDT7132 master.
All timing parameters-including tWC = 25 ns write cycle, tAA = 25 ns address access, and tBDD = 35 ns BUSY-disable-to-valid-data-are specified under VCC = 5.0 V ±10% and TA = –40°C to +85°C, with full standby current ISB3 ≤ 0.2 mA (typ.) and active power consumption of 325 mW (typ.), enabled by CMOS process technology and CE-controlled automatic power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (16,384 bits), dual-port, asynchronous SRAM |
| Max Read Cycle Time (tRC) | 25 ns - defines minimum interval between successive reads on same port |
| Data Retention Voltage | 2.0 V - enables battery backup operation with guaranteed data hold at reduced supply |
| Full Standby Current (ISB3) | 0.2 mA (typ.) - ultra-low power state when both ports disabled with CMOS-level inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Supply Voltage | 4.5 V to 5.5 V - TTL-compatible single 5 V ±10% rail, no auxiliary supplies required |
| Input Leakage Current |ILI| | ≤5 µA - ensures minimal loading on address/control busses during high-impedance states |
Pinout & Package
Package: 48-pin Flatpack (FP48), 48-pin LCC (LC48), or 48-pin DIP (PDG48/SB48); body dimensions vary per package type but all share identical pin numbering and function mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins ensure stable return path for both ports' I/O and core logic |
| VCC (Pin 25) | Power supply | Single 5 V supply powers entire device; all VCC pins must be connected externally |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down mode and bus contention readiness |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; high-Z when deasserted to prevent bus conflicts |
| R/WL / R/WR | Read/write control (left/right) | Active-low write command; determines direction of data transfer on associated port |
| BUSYL / BUSYR | BUSY input (left/right) | Asynchronous slave-side BUSY flag input - gates writes when pulled low by IDT7132 master |
| A0L–A10L / A0R–A10R | Address inputs (left/right) | 11-bit address bus per port selects one of 2K locations independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data bus per port; high-impedance when OE or CE inactive |
Key Features
| Feature | Design Value |
|---|---|
| Slave-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7132 master in width-expanded systems |
| 2.0 V data retention | Enables seamless battery backup without external voltage translation or supervision circuitry |
| Independent port power-down | CE-driven standby reduces power per port - e.g., ISB2 = 50 mA (typ.) with one port active |
| TTL-compatible signaling | Direct interface with legacy 5 V microcontrollers, DSPs, and FPGAs without level shifters |
| MIL-PRF-38535 QML compliance option | Available in military-grade screening for high-reliability aerospace and defense applications |
Applications
| Real-Time Digital Signal Processing | Avionics Data Buffering |
|---|---|
|
Use Scenario: Simultaneous capture of sensor data on one port while feeding processed results to DACs on the other port in radar pulse compression systems. IC Role / Device Role / Timing Role: Slave dual-port SRAM providing non-blocking, low-latency memory access between ADC and DSP subsystems. Use Value: 25 ns tRC enables sub-40 MHz sustained throughput; BUSY input prevents data corruption during concurrent access to shared coefficients. |
Use Scenario: Interfacing flight control computers with inertial measurement units (IMUs) requiring deterministic read/write latency and fault-tolerant data hold. IC Role / Device Role / Timing Role: Industrial-temperature slave RAM storing calibrated sensor offsets and real-time telemetry buffers. Use Value: 2.0 V data retention preserves critical calibration data during main power loss; MIL-PRF-38535 variants support extended mission profiles. |
| Industrial PLC Memory Expansion | Military Communications Baseband |
|
Use Scenario: Expanding memory width beyond 8 bits using IDT7132 master + multiple IDT7142LA25J slaves in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Width-expansion slave synchronizing with master's BUSY arbitration to maintain atomic 16-bit+ word writes. Use Value: Eliminates external AND gates for BUSY aggregation; tAPS = 5 ns ensures priority resolution within tight scan-cycle deadlines. |
Use Scenario: Storing encrypted voice packet headers and payload fragments in secure HF/VHF radios with dual-CPU architecture. IC Role / Device Role / Timing Role: Dual-port buffer enabling simultaneous encryption engine access and RF modem DMA transfers. Use Value: Independent port timing (tWC = 25 ns, tRC = 25 ns) sustains >38 Mbps effective bandwidth; industrial temp range supports vehicle-mounted deployment. |
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 CY7C1371DV33-250BZI | 3.3 V core, 250 MHz QDR interface, no BUSY arbitration logic, 2.5 V data retention | Requires level-shifting for 5 V systems; lacks native MASTER/SLAVE expansion capability | Select only for new 3.3 V designs needing higher bandwidth; not drop-in compatible |
| IDT7132LA25J | Master variant with on-chip arbitration logic and open-drain BUSY outputs; identical speed, retention, and package | Used as controlling master in same-width expansion topologies; cannot substitute directly as slave | Required when building custom MASTER/SLAVE arrays - use IDT7142LA25J only as slave companion |
Compared with IDT7142LA25J, the CY7C1371DV33-250BZI offers higher speed but mandates system-level voltage redesign, while IDT7132LA25J provides complementary master functionality but cannot replace slave behavior - true functional equivalence requires pairing both IDT parts.
Availability
IDT7142LA25J is available at Aetrix Electronics and suitable for real-time digital signal processing, avionics data buffering, and industrial PLC memory expansion requiring stable component supply across extended product lifecycles.
Supply support for IDT7142LA25J 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning solutions for communications, computing, and industrial markets.
IDT7142LA25J belongs to the IDT7132/7142 dual-port SRAM family, engineered specifically for deterministic, contention-free memory expansion in high-reliability embedded systems where simultaneous access and hardware-enforced arbitration are critical.
FAQ
What is the role of BUSYL and BUSYR on the IDT7142LA25J?
On the IDT7142LA25J, BUSYL and BUSYR are dedicated input terminals - not outputs - used to receive BUSY signals from an external IDT7132 master device. When either pin is driven low, the corresponding port's write operation is internally inhibited to prevent data corruption during address contention. This design eliminates need for external arbitration logic in width-expanded memory systems.
Does the IDT7142LA25J support battery backup operation?
Yes, the IDT7142LA25J supports battery backup operation with guaranteed data retention at VCC = 2.0 V (min.), as confirmed in the Data Retention Characteristics table. This LA-series feature enables maintenance of stored configuration or calibration data during main power interruption, with ICCDR ≤ 4000 µA (military grade) or ≤ 1500 µA (commercial grade) under retention conditions.
Can the IDT7142LA25J be used as a standalone dual-port RAM without an IDT7132 master?
Yes, the IDT7142LA25J functions as a fully independent dual-port SRAM without requiring an IDT7132 master. In standalone mode, BUSYL and BUSYR must be held high (e.g., via pull-up resistors) to enable writes on both ports. All timing, power, and interface specifications remain valid - the device does not require arbitration logic to operate correctly in non-contention scenarios.
Which packages are available for the IDT7142LA25J?
The IDT7142LA25J is offered in three industry-standard 48-pin packages: flatpack (FP48), leadless ceramic chip carrier (LC48), and dual in-line package (PDG48/SB48). Pinout and electrical characteristics are identical across all variants; mechanical dimensions differ - FP48 measures ~0.75″ × 0.75″ × 0.11″, LC48 ~0.57″ × 0.57″ × 0.68″, and SB48 ~0.62″ × 2.43″ × 0.15″.
How does the IDT7142LA25J differ from the IDT7142SA25J?
The IDT7142LA25J and IDT7142SA25J share identical speed grade (25 ns), memory size (2K × 8), and pinout, but differ in power profile: LA denotes low-power version with 1 mW (typ.) standby power and 2.0 V data retention, while SA specifies standard-power version with 5 mW (typ.) standby and no retention capability. Both use the same CMOS process and timing specs under active operation.
7142LA25J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7142LA25J FAQ
1.How can I place an order for 7142LA25J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142LA25J 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 7142LA25J reliable?
The price and inventory of 7142LA25J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142LA25J is usually 5 days.
3.What payment methods are accepted for 7142LA25J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142LA25J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142LA25J?
7142LA25J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142LA25J 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 7142LA25J?
For technical support, including 7142LA25J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142LA25J requirements.
6.How does Aetrix verify that 7142LA25J is sourced from the original manufacturer or authorized distributors?
All 7142LA25J 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 7142LA25J meets industry standards.
7.What is the process for return or replacement of 7142LA25J?
All 7142LA25J units undergo pre-shipment inspection (PSI). If there is an issue with 7142LA25J, 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 7142LA25J part is unused and in its original packaging.
Return procedure for 7142LA25J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142LA25J Tags
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