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Renesas 7142LA100PDG
- Part No.:
- 7142LA100PDG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7142LA100PDG.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 48DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,988
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Product details
Overview
7142LA100PDG from IDT is a low-power 2K × 8 dual-port static RAM configured as a slave device in master/slave memory expansion systems, supporting 100 ns read/write cycle time, 5 V ±10% supply, industrial temperature range (–40°C to +85°C), and battery-backed data retention at 2 V. It enables error-free 16-bit-or-wider memory systems without external logic.
For engineers reviewing the 7142LA100PDG datasheet, 7142LA100PDG pinout, 7142LA100PDG application, or 7142LA100PDG equivalent, key selection considerations include BUSY-input arbitration behavior, 100 ns timing compliance, 48-pin PDIP package compatibility, and LA-series 1 µA full-standby current performance.
Technical Context
The 7142LA100PDG implements independent left/right ports with separate address (A0–A10), control (CEL/CER, R/WL/R/WR, OEL/OER), and I/O (I/O0–I/O7) lines, enabling asynchronous concurrent access. Its BUSY pin functions exclusively as an input-unlike the master IDT7132-allowing write inhibition during port contention.
It uses CMOS high-performance fabrication for 325 mW typical active power and 1 µA full-standby current (ISB3) under CMOS-level inputs. Data retention at 2 V is supported only in LA variants, with tCDR = 0 ns and ICCDR ≤ 1500 µA (commercial) or ≤ 4000 µA (industrial/military).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits (2048 words × 8-bit wide), sufficient for small real-time buffers or dual-CPU shared memory |
| Access Time | 100 ns max read cycle (tRC), defining minimum clock period for synchronous interface integration |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), compatible with legacy TTL and 5 V microcontroller buses |
| Operating Temp | –40°C to +85°C industrial grade, validated for embedded control and instrumentation |
| Standby Current | 1 µA (ISB3, both ports fully disabled with CMOS inputs), enabling battery backup operation |
| Data Retention | 2.0 V minimum VCC for data hold, allowing operation from coin-cell or backup rail |
| Package | 48-pin plastic DIP (PDG48), 0.55″ × 2.43″ footprint, through-hole mountable |
Pinout & Package
48-pin plastic dual in-line package (PDG48) with 0.3″ row spacing, body size ≈ 0.55 in × 2.43 in × 0.18 in. Pin 1 index corner marked; all VCC pins require connection to 5 V supply, all GND pins to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24, 25) | Ground reference | Three dedicated ground pins reduce noise coupling between ports and improve signal integrity |
| VCC (Pins 23, 48) | Power supply | Dual VCC pins ensure stable core voltage delivery across high-speed switching activity |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down mode when high |
| R/WL / R/WR | Read/write direction (left/right) | Low = write, high = read; determines I/O driver direction per port |
| OEL / OER | Output enable (left/right) | Active-low enables output drivers; high-Z when deasserted |
| BUSYL / BUSYR | Busy arbitration input | Slave-only inputs that gate writes when asserted low; require pull-up if driven by open-drain master |
| A0L–A10L / A0R–A10R | Address inputs (left/right) | 11-bit addressing per port supports full 2K memory map access independently |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O bus (left/right) | Bidirectional 8-bit buses; high-impedance when CE or OE inactive |
Key Features
| Feature | Design Value |
|---|---|
| Slave-mode BUSY input | Enables seamless integration with IDT7132 master for hardware-controlled write arbitration without glue logic |
| 2 V data retention | Preserves memory contents during main power loss using low-voltage backup source (LA-specific) |
| 1 µA full-standby current | Minimizes system-level quiescent power in always-on or battery-operated applications |
| 100 ns timing compliance | Supports high-throughput inter-processor communication at up to 10 MHz sustained rate |
| TTL-compatible I/O | Direct interfacing with 5 V microcontrollers, FPGAs, and legacy logic families without level shifters |
Applications
| Real-Time Digital Signal Processing | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: Two DSP cores concurrently access shared coefficient or sample buffer memory with deterministic latency. IC Role / Device Role / Timing Role: Slave dual-port RAM providing synchronized, contention-managed data exchange between processing units. Use Value: Eliminates software arbitration overhead and guarantees atomicity via hardware BUSY signaling at 100 ns timing. | Use Scenario: PLC CPU and I/O processor share status registers and control flags in harsh industrial environments. IC Role / Device Role / Timing Role: Industrial-grade dual-port SRAM acting as fault-tolerant shared memory with 2 V data retention. Use Value: Maintains critical state during brownouts; 1 µA standby enables extended backup runtime. |
| Avionics Data Logger Interface | Medical Imaging Frame Buffer |
Use Scenario: Flight data recorder captures sensor streams while host processor reads prior frames for analysis. IC Role / Device Role / Timing Role: Slave-side memory in master/slave pair handling simultaneous write capture and readout. Use Value: Prevents data corruption during overlapping accesses using BUSY-driven write inhibit at 100 ns resolution. | Use Scenario: Ultrasound or MRI system buffers real-time pixel data for display engine readout. IC Role / Device Role / Timing Role: Dual-port SRAM serving as ping-pong frame buffer between acquisition and rendering pipelines. Use Value: Enables zero-latency frame handoff with no CPU intervention, leveraging independent port timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-100JC | 5 V, 2K × 8, 100 ns, but no BUSY arbitration logic; requires external control for contention management | Lacks hardware port arbitration; suitable only where software coordination or external logic is acceptable | Select when cost sensitivity outweighs need for guaranteed atomic access and BUSY signaling |
| IDT7132LA100PDG | Same family, same speed/package, but master variant with BUSY output and on-chip arbitration logic | Used as master in same-width expansion; cannot substitute directly due to BUSY pin direction mismatch | Choose only when building master/slave pair - never as standalone replacement for 7142LA100PDG |
Compared with CY7C133-100JC, 7142LA100PDG delivers hardware-enforced write arbitration without external components; compared with IDT7132LA100PDG, it provides slave-side functionality essential for scalable multi-word memory systems.
Availability
7142LA100PDG is available at Aetrix Electronics and suitable for industrial control systems, avionics data loggers, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and verified 100 ns timing performance.
Supply support for 7142LA100PDG 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 IDT7132/7142 product line was designed for high-reliability dual-processor and real-time embedded systems requiring deterministic, contention-free shared memory access with minimal external logic.
FAQ
What is the function of the BUSY pins on the 7142LA100PDG?
The BUSYL and BUSYR pins on the 7142LA100PDG are dedicated inputs used exclusively for hardware write arbitration in master/slave configurations. When asserted low by an IDT7132 master, they internally inhibit write operations on the corresponding port. Unlike the master IDT7132, the 7142LA100PDG does not drive BUSY signals-it receives them. Pull-up resistors are required only if the driving master uses open-drain outputs.
Does the 7142LA100PDG support battery backup operation?
Yes, the 7142LA100PDG supports battery backup operation with guaranteed data retention at VCC = 2.0 V. This LA-series feature allows the device to maintain stored data during main power failure. The data retention current (ICCDR) is specified at ≤1500 µA for commercial grade and ≤4000 µA for industrial/military grades, enabling practical use with standard backup cells or supercapacitors.
Can the 7142LA100PDG be used as a standalone dual-port RAM without a master device?
Yes, the 7142LA100PDG can operate as a standalone dual-port RAM. In this mode, both BUSYL and BUSYR must be held high (via pull-up resistors) to disable write inhibition. All other control, address, and I/O functions remain fully operational. However, hardware arbitration for simultaneous same-address access is unavailable-software coordination or external logic is required to prevent data corruption.
What is the meaning of "PDG" in the part number 7142LA100PDG?
The "PDG" suffix in 7142LA100PDG denotes the 48-pin plastic dual in-line package (PDIP) variant with standard lead finish and industrial temperature rating. It distinguishes this version from alternatives such as LC48 (LCC), FP48 (flatpack), SB48 (side-braze DIP), or PLG52 (PLCC). The PDG package has a body size of approximately 0.55 in × 2.43 in × 0.18 in and uses through-hole mounting.
How does the 7142LA100PDG differ from the SA version (e.g., 7142SA100PDG)?
The 7142LA100PDG differs from the SA version primarily in power consumption and data retention capability. The LA variant offers 1 µA full-standby current (ISB3) versus 15 µA for SA, and supports 2 V data retention-features absent in the SA series. Both share identical timing (100 ns), pinout, and functional behavior; the LA designation specifically indicates low-power and battery-backup optimized design.
7142LA100PDG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-DIP (0.600", 15.24mm)
- 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:
- 100ns
- Access Time:
- 100 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 48-PDIP
7142LA100PDG FAQ
1.How can I place an order for 7142LA100PDG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142LA100PDG 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 7142LA100PDG reliable?
The price and inventory of 7142LA100PDG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142LA100PDG is usually 5 days.
3.What payment methods are accepted for 7142LA100PDG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142LA100PDG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142LA100PDG?
7142LA100PDG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142LA100PDG 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 7142LA100PDG?
For technical support, including 7142LA100PDG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142LA100PDG requirements.
6.How does Aetrix verify that 7142LA100PDG is sourced from the original manufacturer or authorized distributors?
All 7142LA100PDG 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 7142LA100PDG meets industry standards.
7.What is the process for return or replacement of 7142LA100PDG?
All 7142LA100PDG units undergo pre-shipment inspection (PSI). If there is an issue with 7142LA100PDG, 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 7142LA100PDG part is unused and in its original packaging.
Return procedure for 7142LA100PDG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142LA100PDG Tags
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