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Renesas 7142SA100J
- Part No.:
- 7142SA100J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7142SA100J.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
7142SA100J from 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 max read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C) - used in real-time avionics data buffering and multi-processor interconnects.
For engineers reviewing the 7142SA100J datasheet, 7142SA100J pinout, 7142SA100J application, or 7142SA100J equivalent, key selection considerations include BUSY input functionality (not output), absence of on-chip arbitration logic, compatibility with IDT7132SA100J master devices, and support for 48-pin flatpack, LCC, DIP, and 52-pin PLCC packages.
Technical Context
The 7142SA100J operates as a SLAVE dual-port SRAM with dedicated BUSY input pins (BUSYL, BUSYR) that internally inhibit write operations when asserted low, enabling hardware-controlled port arbitration in width-expanded memory systems. It lacks on-chip arbitration logic and relies entirely on external BUSY signals from a MASTER IDT7132 device.
Its dual-port architecture provides fully independent address, control, and I/O paths per port (A0L–A10L/I/O0L–I/O7L/OEL/CEL/R/WL and A0R–A10R/I/O0R–I/O7R/OER/CER/R/WR), with CE-controlled power-down modes yielding ISB3 ≤ 1.0 mA (full standby, CMOS inputs) and ICC ≤ 65 mA (dynamic operation at fMAX).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits (2048 words × 8-bit wide), enabling compact dual-access buffer storage without external width expansion logic |
| Read Cycle Time | 100 ns max - defines minimum interval between successive reads on same port, critical for deterministic real-time response |
| Supply Voltage | 5.0 V ±10% - requires single TTL-compatible rail; no separate VDD/VSS sequencing needed |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including motor control and instrumentation |
| Standby Current | ISB3 ≤ 1.0 mA (both ports, CMOS-level inputs) - enables low-power sleep states in battery-backed or energy-sensitive designs |
| Input Leakage | |ILI| ≤ 10 µA - ensures reliable logic-level recognition across voltage and temperature extremes |
| Output Drive | VOL ≤ 0.4 V @ 4 mA - guarantees solid LOW-level interface with standard TTL/CMOS receivers |
Pinout & Package
7142SA100J is available in 48-pin flatpack (FP48), 48-pin LCC (LC48), 48-pin DIP (PDG48/SB48), and 52-pin PLCC (PLG52) packages. Pin functions are identical across all packages except for pin count and physical layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable controlling port-specific power-down; ISB2/ISB4 current reduction when high |
| OEL / OER | Output Enable (Left/Right) | Active-low control of I/O bus drivers; places outputs in high-Z when deasserted |
| R/WL / R/WR | Read/Write Control (Left/Right) | High = read, Low = write; determines direction of data flow on respective I/O bus |
| BUSYL / BUSYR | BUSY Input (Left/Right) | Active-low signal from MASTER device; internally gates write cycles when low - no internal generation |
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address buses selecting one of 2048 memory locations independently per port |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left/Right) | Bidirectional 8-bit data paths; driven during writes, tri-stated or driven during reads per OE/RW state |
| VCC / GND | Power / Ground | Multiple VCC and GND pins required for noise immunity; all must be connected per datasheet note |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Accepts external BUSY signals to block concurrent writes - eliminates need for external arbitration logic in width-expanded systems |
| Independent dual-port timing | Full asynchronous operation: left and right ports access any address simultaneously without software coordination |
| TTL-compatible I/O | Direct interface with 5V microcontrollers, FPGAs, and ASICs without level-shifting circuitry |
| Low-power standby modes | ISB3 ≤ 1.0 mA (full standby) and ISB4 ≤ 40 mA (one active port) - reduces system power in idle intervals |
| Industrial temperature qualification | Validated operation from –40°C to +85°C - suitable for factory automation, transportation, and outdoor electronics |
Applications
| Real-Time Avionics Data Buffering | Dual-Processor Interconnect Memory |
|---|---|
Use Scenario: Concurrent data capture from inertial sensors and output to flight control unit in UAV autopilot systems. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing sensor acquisition (left port) and actuator command dispatch (right port) with hardware BUSY arbitration. Use Value: Eliminates CPU polling or software locks; 100 ns access ensures sub-millisecond latency for safety-critical loops. | Use Scenario: Shared memory between ARM host processor and DSP co-processor in radar signal processing units. IC Role / Device Role / Timing Role: SLAVE device paired with IDT7132SA100J MASTER to form 16-bit-wide memory space accessible by both processors. Use Value: Enables full-bandwidth parallel access without bus contention, reducing inter-processor communication overhead by >90% vs. serial interfaces. |
| Industrial PLC I/O Mapping Table | Test Equipment Pattern Memory |
Use Scenario: Storing and updating real-time I/O status maps in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Dual-port RAM holding mirrored I/O image - one port updated by scan engine, other read by communication stack. Use Value: Guarantees atomic updates via BUSY handshake; prevents torn reads during rapid I/O state transitions. | Use Scenario: Storing high-speed digital test patterns in automated test equipment (ATE) for semiconductor wafer probing. IC Role / Device Role / Timing Role: SLAVE memory receiving pattern data from pattern generator (left port) while feeding sequencer (right port) at 10 MHz. Use Value: 100 ns tRC supports sustained 10 Mwords/s throughput - matches ATE timing requirements without FIFO bottlenecks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7142SA55J | 55 ns max read cycle time; otherwise identical pinout, function, and package options | Higher speed required for <60 ns memory access deadlines; higher ICC (155 mA typ) | Select when system timing budget demands faster access; verify thermal design for increased power dissipation |
| CY7C137V-100AXC | 100 ns access, but uses 3.3V core supply (5V-tolerant I/O); different pinout and no BUSY input logic | Requires level translation and external arbitration logic; not drop-in compatible | Consider only for new 3.3V designs where legacy 5V BUSY arbitration is unnecessary |
Compared with IDT7142SA55J, the 7142SA100J trades speed for lower dynamic current and relaxed timing margins; compared with CY7C137V-100AXC, it retains native 5V operation and integrated BUSY-input arbitration but lacks 3.3V power efficiency.
Availability
7142SA100J is available at Aetrix Electronics and suitable for real-time avionics data buffering, dual-processor interconnect memory, and industrial PLC I/O mapping requiring stable component supply across extended production lifecycles.
Supply support for 7142SA100J 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 timing, memory, and interface solutions, now part of Renesas Electronics.
The IDT7142 product line delivers dual-port SRAMs optimized for deterministic, contention-free multi-processor memory sharing - designed specifically for aerospace, industrial control, and test equipment where hardware arbitration and predictable latency are mandatory.
FAQ
What is the role of BUSY pins on the 7142SA100J?
The BUSYL and BUSYR pins on the 7142SA100J are dedicated inputs - not outputs - that accept active-low BUSY signals from a MASTER IDT7132 device. When asserted, they internally inhibit write operations on the corresponding port. The 7142SA100J does not generate BUSY signals; it solely responds to them, making it strictly a SLAVE in MASTER/SLAVE configurations.
Can the 7142SA100J operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7142SA100J can operate as a standalone dual-port RAM, but without external BUSY coordination, simultaneous writes to the same address from both ports will result in undefined data. Its SLAVE architecture means no internal arbitration logic exists - users must implement external handshaking or ensure non-overlapping access in standalone use.
Which packages are available for the 7142SA100J?
The 7142SA100J is offered in 48-pin flatpack (FP48), 48-pin LCC (LC48), 48-pin plastic or sidebraze DIP (PDG48/SB48), and 52-pin PLCC (PLG52) packages. All share identical pin functions and electrical specifications; mechanical dimensions and mounting methods differ per package type as defined in the datasheet mechanical drawings.
Does the 7142SA100J support battery backup operation?
No, the 7142SA100J does not support battery backup. Only LA-suffix variants (e.g., 7142LA100J) provide 2V data retention capability. The "SA" suffix denotes standard active power consumption (325 mW typ) and requires continuous 5V supply for data retention.
What is the maximum operating frequency implied by the 100 ns specification?
The 100 ns specification refers to maximum read cycle time (tRC), not clock frequency. It defines the minimum interval between successive read operations on the same port. For continuous sequential reads, this corresponds to a maximum effective throughput of 10 million words per second (10 MHz), assuming zero dead time - though actual system rate depends on address setup, hold, and OE timing constraints.
7142SA100J 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:
- 100ns
- Access Time:
- 100 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)
7142SA100J FAQ
1.How can I place an order for 7142SA100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142SA100J 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 7142SA100J reliable?
The price and inventory of 7142SA100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142SA100J is usually 5 days.
3.What payment methods are accepted for 7142SA100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142SA100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142SA100J?
7142SA100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142SA100J 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 7142SA100J?
For technical support, including 7142SA100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142SA100J requirements.
6.How does Aetrix verify that 7142SA100J is sourced from the original manufacturer or authorized distributors?
All 7142SA100J 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 7142SA100J meets industry standards.
7.What is the process for return or replacement of 7142SA100J?
All 7142SA100J units undergo pre-shipment inspection (PSI). If there is an issue with 7142SA100J, 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 7142SA100J part is unused and in its original packaging.
Return procedure for 7142SA100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142SA100J Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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