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Renesas 7142LA100P
- Part No.:
- 7142LA100P
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7142LA100P.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 48DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,747
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Product details
Overview
IDT7142LA100P 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 100 ns maximum read cycle time, 5 V ±10% TTL-compatible supply, and industrial temperature range (–40°C to +85°C). It enables 16-bit-or-wider memory architectures when paired with IDT7132 master devices.
For engineers reviewing the IDT7142LA100P datasheet, IDT7142LA100P pinout, IDT7142LA100P application, or IDT7142LA100P equivalent, key selection considerations include BUSY input functionality for port arbitration, 1 µA full-standby current at CMOS-level inputs, battery-backed data retention at 2 V, and compatibility with 48-pin flatpack, LCC, and DIP packages.
Technical Context
The IDT7142LA100P implements a true dual-port SRAM architecture with fully independent left and right address, control, and I/O buses - no internal arbitration logic resides on the slave device. Its BUSY pin functions exclusively as an input to gate write operations during contention, unlike the IDT7132 master which drives BUSY as an open-drain output.
It supports two distinct power-down modes: TTL-level standby (ISB1/ISB2) and full CMOS-level standby (ISB3/ISB4), achieving 0.2 mA typical ISB3 current. Data retention at 2 V is guaranteed for LA variants only, with tCDR = 0 ns and ICCDR ≤ 1500 µA under commercial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits (2048 words × 8-bit wide), enabling direct byte-level access per port |
| Max Read Cycle Time | 100 ns - defines minimum interval between successive reads on same port |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic rails without level-shifting |
| Standby Current (ISB3) | 0.2 mA typical - ultra-low power retention mode with all inputs at CMOS levels |
| Data Retention Voltage | 2.0 V - maintains stored data during brown-out or backup-battery operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and avionics control applications |
| Package Type | 48-pin flatpack (FP48) - hermetically sealed, leadless ceramic package for high-reliability use |
Pinout & Package
Package: 48-pin flatpack (FP48), body dimensions ≈ 0.75 in × 0.75 in × 0.11 in, side-brazed ceramic construction with index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins required for noise immunity and thermal dissipation |
| VCC (Pin 25) | Power supply | Single 5 V supply; all VCC pins must be connected externally to decoupled rail |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down entry/exit |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; high-Z when disabled |
| R/WL / R/WR | Read/write control (left/right) | High = read, low = write; determines data direction on I/O bus |
| BUSYL / BUSYR | BUSY input (left/right) | Active-low write-inhibit signal from master; gates internal write path |
| A0L–A10L / A0R–A10R | Address inputs (left/right) | 11-bit address bus per port; supports full 2K-word addressing |
| 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 |
|---|---|
| Battery-backed data retention | Operates down to 2.0 V VCC with ≤1500 µA retention current - enables nonvolatile storage during main power loss |
| Master/slave BUSY arbitration interface | BUSY pins accept active-low signals from IDT7132 master to block concurrent writes - eliminates need for external logic |
| Ultra-low full-standby power | 0.2 mA typical ISB3 current with CMOS-level inputs - reduces system sleep-mode power by >95% vs. SA variant |
| Industrial temperature qualification | –40°C to +85°C operation with tested timing margins - suitable for motor drives and railway control units |
| TTL-compatible signaling | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy 5 V microcontrollers and FPGAs without level shifters |
Applications
| Real-Time Digital Signal Processing | Industrial Motion Control |
|---|---|
|
Use Scenario: Simultaneous acquisition of encoder position (Port A) and generation of PWM waveforms (Port B) in servo amplifier firmware. IC Role / Device Role / Timing Role: Dual-port SRAM buffer enabling lock-free cross-port data exchange without CPU intervention or software arbitration. Use Value: Eliminates 100+ ns software semaphore overhead; guarantees deterministic 100 ns worst-case memory access latency for both real-time threads. |
Use Scenario: Coordinating PLC scan cycles between ladder logic engine (Port A) and fieldbus communication stack (Port B) in modular I/O chassis. IC Role / Device Role / Timing Role: Shared memory hub with hardware BUSY arbitration preventing corrupted register updates during simultaneous access. Use Value: Prevents race-condition-induced motion faults; enables atomic 16-bit word transfers when paired with IDT7132 master in width-expanded configuration. |
| Military Avionics Data Logging | Medical Imaging Frame Buffer |
|
Use Scenario: Storing sensor telemetry (Port A) while streaming encrypted logs to secure flash (Port B) in DO-254-compliant flight recorder. IC Role / Device Role / Timing Role: Radiation-tolerant SRAM with 2 V data retention serving as fail-safe buffer during power transients. Use Value: Maintains last 2 KB of critical flight parameters across 500 ms brownouts - meets MIL-PRF-38535 QML Class V requirements. |
Use Scenario: Interleaved capture of ultrasound echo data (Port A) and display-ready pixel stream (Port B) in portable diagnostic device. IC Role / Device Role / Timing Role: Low-power dual-port memory minimizing thermal load in handheld enclosure while sustaining 100 ns pixel clock alignment. Use Value: Reduces active power to 325 mW typical and standby to 200 µW - extends battery life by 3.2× vs. single-port alternatives. |
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 CY7C136-100JC | 100 ns access, 2K × 8, but uses 3-state BUSY outputs and lacks 2 V data retention | Requires external pull-up resistors and cannot support battery backup operation | Select when legacy Cypress footprint compatibility is required and backup power is not needed |
| ISSI IS61LV25616AL-100TQLI | 16-bit bus width, 256K × 16 organization, 3.3 V supply only, no BUSY arbitration logic | Designed for wider data paths and lower voltage systems; no native master/slave coordination | Select for higher density and lower voltage designs where external arbitration logic is acceptable |
Compared with CY7C136-100JC and IS61LV25616AL-100TQLI, the IDT7142LA100P uniquely delivers hardware-enforced write inhibition via BUSY input and guaranteed 2 V data retention - critical for safety-critical industrial and aerospace systems requiring zero-software-failure memory coherency.
Availability
IDT7142LA100P is available at Aetrix Electronics and suitable for industrial motion control, military avionics data logging, and medical imaging frame buffer applications requiring stable component supply, long-term lifecycle support, and hermetic packaging.
Supply support for IDT7142LA100P 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 timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019. IDT's dual-port SRAMs were engineered for deterministic real-time systems.
The IDT7142LA100P belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for master/slave memory expansion in industrial controllers, radar processors, and telecom infrastructure where concurrent port access and hardware arbitration are mandatory.
FAQ
What is the function of BUSYL and BUSYR on the IDT7142LA100P?
BUSYL and BUSYR are dedicated input pins on the IDT7142LA100P that accept active-low BUSY signals from an IDT7132 master device. When asserted, they internally inhibit write operations on the corresponding port - this hardware arbitration prevents data corruption during simultaneous access to the same memory location. Unlike the master, the IDT7142LA100P does not drive BUSY signals.
Does the IDT7142LA100P support battery backup operation?
Yes, the IDT7142LA100P supports battery backup operation with guaranteed data retention at 2.0 V VCC. This capability is exclusive to LA variants (not SA), and the device draws ≤1500 µA in retention mode under commercial conditions. The 2 V threshold allows integration with coin-cell batteries or supercapacitors for hold-up power during main supply interruption.
Which packages are available for the IDT7142LA100P?
The IDT7142LA100P is offered in 48-pin flatpack (FP48), 48-pin LCC (LC48), and 48-pin plastic or side-brazed DIP (PDG48/SB48) packages. The FP48 variant features a hermetically sealed ceramic body (0.75 in × 0.75 in × 0.11 in) suited for high-reliability applications. Pinout is identical across all 48-pin packages, enabling drop-in substitution based on environmental requirements.
How does the IDT7142LA100P differ from the IDT7132LA100P?
The IDT7142LA100P is a slave-only dual-port SRAM with BUSY inputs and no on-chip arbitration logic, whereas the IDT7132LA100P is a master device featuring BUSY outputs, internal port arbitration, and a busy flag generator. They are functionally complementary: IDT7142LA100P expands data bus width when paired with IDT7132LA100P, but cannot operate stand-alone in arbitration-sensitive configurations.
What is the minimum supply voltage for active operation of the IDT7142LA100P?
The IDT7142LA100P requires a minimum supply voltage of 4.5 V for active operation, per its DC operating conditions (VCC = 4.5 V to 5.5 V). While it retains data at 2.0 V, functional read/write operations are only specified and guaranteed within the 4.5–5.5 V range. Operating below 4.5 V may result in timing violations, increased current draw, or undefined behavior.
7142LA100P 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
7142LA100P FAQ
1.How can I place an order for 7142LA100P through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142LA100P 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 7142LA100P reliable?
The price and inventory of 7142LA100P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142LA100P is usually 5 days.
3.What payment methods are accepted for 7142LA100P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142LA100P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142LA100P?
7142LA100P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142LA100P 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 7142LA100P?
For technical support, including 7142LA100P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142LA100P requirements.
6.How does Aetrix verify that 7142LA100P is sourced from the original manufacturer or authorized distributors?
All 7142LA100P 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 7142LA100P meets industry standards.
7.What is the process for return or replacement of 7142LA100P?
All 7142LA100P units undergo pre-shipment inspection (PSI). If there is an issue with 7142LA100P, 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 7142LA100P part is unused and in its original packaging.
Return procedure for 7142LA100P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142LA100P Tags
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