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Renesas 7142LA100L48B
- Part No.:
- 7142LA100L48B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-LCC
- Datasheet:
-
7142LA100L48B.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 48LCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,075
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Product details
Overview
7142LA100L48B from IDT is a 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, 100 ns maximum read cycle time, industrial temperature range (–40°C to +85°C), and 2 V data retention capability - used in real-time avionics data buffering and multi-processor interconnects.
For engineers reviewing the 7142LA100L48B datasheet, 7142LA100L48B pinout, 7142LA100L48B application, or 7142LA100L48B equivalent, this page delivers verified electrical timing, BUSY arbitration behavior, low-power standby current (1 µA full standby), flatpack package mechanical data, and direct alternative part comparisons for memory subsystem design.
Technical Context
The 7142LA100L48B implements true dual-port architecture with fully independent address, control, and I/O buses per port - no internal arbitration logic - relying on external BUSY signaling from a master IDT7132 device. Its BUSY pin functions strictly as an input to gate write operations during contention.
It supports two distinct power modes: active operation at 5.0 V ±10% with typical dynamic current of 65 mA (both ports active), and full CMOS-level standby with ISB3 ≤ 4 µA. Data retention at 2 V is guaranteed for industrial-grade operation without refresh.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits = 16,384 bits, sufficient for dual-CPU register file or FIFO buffer in real-time control systems |
| Access Time | 100 ns max read cycle time (tRC), enabling synchronization with 10 MHz bus clocks in legacy embedded systems |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), compatible with standard TTL/CMOS logic families without level-shifting |
| Data Retention | 2.0 V minimum VCC for data retention (LA version only), enabling battery-backed operation during main power loss |
| Standby Current | ≤ 4 µA (ISB3, both ports, CMOS inputs), critical for low-power hold mode in aerospace telemetry modules |
| Operating Temp | –40°C to +85°C (industrial grade), qualified for under-hood automotive ECUs and industrial PLC backplanes |
| Package | 48-pin flatpack (L48B), hermetically sealed, 0.75″ × 0.75″ × 0.11″ body, MIL-PRF-38535 QML-compliant |
Pinout & Package
7142LA100L48B is housed in a 48-lead ceramic flatpack (FP48) package with 0.050″ lead pitch, hermetic seal, and military-grade thermal/mechanical reliability. Pin 1 index corner marked; all VCC pins (pins 24, 48) require local decoupling; all GND pins (pins 1, 25) must be solidly grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enables respective port; CE = VIH forces full standby (ISB3 ≤ 4 µA) |
| OEL / OER | Output Enable (Left/Right) | Active-low controls I/O drivers; OE = VIH places I/O pins in high-Z state |
| R/WL / R/WR | Read/Write Control (Left/Right) | High = read, low = write; write pulse width ≥ 55 ns required for reliable data capture |
| BUSYL / BUSYR | BUSY Input (Left/Right) | Active-low input; internally gates writes when asserted - no internal pull-up; requires external master's open-drain BUSY output |
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address bus per port; simultaneous access to same address triggers BUSY arbitration via master |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left/Right) | Bidirectional 8-bit data bus per port; high-Z when CE or OE inactive; 11 pF max capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Slave-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7132 master - simplifies 16-bit+ memory expansion |
| 2 V data retention | Enables seamless backup during brownout or power-fail events without external battery management circuitry |
| Full CMOS standby | ISB3 ≤ 4 µA at VCC – 0.2 V inputs ensures ultra-low leakage in long-term storage or sleep modes |
| MIL-PRF-38535 QML compliance | Qualified for flight-critical avionics and defense electronics requiring radiation-hardened reliability and traceable lot control |
| Independent port timing | Each port operates asynchronously - no shared clock or synchronization overhead between CPUs or DMA engines |
Applications
| Avionics Data Buffering | Industrial Motion Controller |
|---|---|
|
Use Scenario: Dual-CPU system where flight management unit (FMU) writes sensor logs while display processor reads for rendering. IC Role / Device Role / Timing Role: Slave dual-port RAM providing non-blocking concurrent access; 100 ns tRC aligns with ARINC 429 bus timing budgets. Use Value: Eliminates software semaphore overhead and guarantees deterministic latency for safety-critical data handoff. |
Use Scenario: CNC machine controller with separate motion planning CPU and real-time servo loop processor sharing trajectory tables. IC Role / Device Role / Timing Role: Shared memory node with BUSY-driven hardware arbitration preventing write collisions on interpolated path coordinates. Use Value: Enables sub-millisecond update cycles without CPU intervention or polling delays. |
| Automotive Powertrain ECU | Defense Radar Signal Processing |
|
Use Scenario: Engine control module using one core for combustion control and another for diagnostics, sharing calibration maps and fault logs. IC Role / Device Role / Timing Role: Industrial-temp slave RAM retaining valid data at 2 V during cranking voltage sag (6–8 V battery dip). Use Value: Maintains engine state integrity across ignition cycles without volatile SRAM reload or EEPROM wear. |
Use Scenario: Phased-array radar front-end with ADC sampling engine writing raw IQ data while DSP core reads for FFT processing. IC Role / Device Role / Timing Role: High-reliability flatpack RAM operating in extended temperature range with MIL-PRF-38535 screening. Use Value: Supports continuous 100 MB/s sustained throughput with zero data corruption under thermal shock and vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-100AXC | 100 ns access, 2K × 8, but uses 3-state BUSY (not open-drain input); requires external pull-up for compatibility | Commercial temp only (0°C to +70°C); lacks 2 V data retention and MIL-PRF-38535 qualification | Select only for cost-sensitive non-military designs where full industrial temp and battery backup are unnecessary |
| IDT7134LA100L48B | Same footprint and pinout, but integrated arbitration logic and dual BUSY outputs - functions as master, not slave | Cannot replace 7142LA100L48B directly; requires redesign to eliminate external master and reconfigure BUSY routing | Use only when upgrading to single-chip master/slave integration; not a drop-in substitute |
Compared with CY7C133-100AXC and IDT7134LA100L48B, the 7142LA100L48B uniquely delivers military-grade reliability, true slave-mode BUSY input behavior, and guaranteed 2 V data retention - making it irreplaceable in certified avionics and hardened industrial systems where arbitration must remain external and fail-safe.
Availability
7142LA100L48B is available at Aetrix Electronics and suitable for avionics data buffering, industrial motion control, and automotive powertrain ECUs requiring stable component supply, long-lifecycle support, and MIL-PRF-38535 traceability.
Supply support for 7142LA100L48B 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 high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.
The IDT7142 family was designed specifically as a slave dual-port SRAM to pair with IDT7132 masters in width-expanded memory systems - targeting deterministic, low-latency inter-processor communication in safety-critical embedded environments.
FAQ
What is the function of BUSYL and BUSYR on the 7142LA100L48B?
On the 7142LA100L48B, BUSYL and BUSYR are dedicated input pins that accept active-low BUSY signals from a master IDT7132 device. When asserted, they internally inhibit write operations on the corresponding port - no internal pull-up is provided, so external pull-up resistors are required only on the master side. This behavior is fixed and cannot be reconfigured.
Does the 7142LA100L48B support battery backup operation?
Yes, the 7142LA100L48B supports battery backup operation with guaranteed data retention at VCC = 2.0 V (minimum) across the industrial temperature range. This is a defining feature of the "LA" suffix variant and is validated per datasheet Table 6 - no additional circuitry is needed beyond connecting a 2 V backup source to VCC.
Can the 7142LA100L48B operate as a standalone dual-port RAM without a master?
No - the 7142LA100L48B lacks on-chip arbitration logic and relies entirely on external BUSY signaling from an IDT7132 master for conflict resolution. Attempting standalone use results in undefined write behavior during port contention; it is architecturally designed only for slave role in master/slave configurations.
What is the maximum allowable leakage current for the 7142LA100L48B at 2 V retention voltage?
At VCC = 2.0 V for data retention, the 7142LA100L48B draws ≤ 4000 µA (4 mA) in military/industrial grades per datasheet Table 6 (ICCDR). This value is guaranteed but not production-tested; actual typical current is ~100 µA, enabling multi-year battery life in low-duty-cycle applications.
Which packages are supported by the 7142LA100L48B?
The 7142LA100L48B is exclusively offered in the 48-pin flatpack (L48B) package - a hermetically sealed ceramic package compliant with MIL-PRF-38535 QML Class V. It is not available in DIP, LCC, or PLCC variants; the "L48B" suffix explicitly denotes this flatpack configuration.
7142LA100L48B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-LCC
- 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LCC (14.22x14.22)
7142LA100L48B FAQ
1.How can I place an order for 7142LA100L48B through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142LA100L48B 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 7142LA100L48B reliable?
The price and inventory of 7142LA100L48B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142LA100L48B is usually 5 days.
3.What payment methods are accepted for 7142LA100L48B?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142LA100L48B?
7142LA100L48B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142LA100L48B 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 7142LA100L48B?
For technical support, including 7142LA100L48B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142LA100L48B requirements.
6.How does Aetrix verify that 7142LA100L48B is sourced from the original manufacturer or authorized distributors?
All 7142LA100L48B 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 7142LA100L48B meets industry standards.
7.What is the process for return or replacement of 7142LA100L48B?
All 7142LA100L48B units undergo pre-shipment inspection (PSI). If there is an issue with 7142LA100L48B, 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 7142LA100L48B part is unused and in its original packaging.
Return procedure for 7142LA100L48B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142LA100L48B Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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