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Renesas 7142SA100L48B
- Part No.:
- 7142SA100L48B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-LCC
- Datasheet:
-
7142SA100L48B.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 48LCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT7142SA100L48B 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 architectures. It supports independent asynchronous read/write access on left and right ports, features 100 ns maximum read cycle time (tRC), operates on single 5V ±10% supply, and uses TTL-compatible logic levels. It is deployed in real-time digital signal processing systems requiring concurrent data access by two processors or DMA controllers.
For engineers reviewing the IDT7142SA100L48B datasheet, IDT7142SA100L48B pinout, IDT7142SA100L48B application, or IDT7142SA100L48B equivalent, key selection considerations include BUSY input behavior (not output), absence of on-chip arbitration logic, compatibility with IDT7132SA/LA master devices for 16-bit+ bus width expansion, and 48-pin flatpack packaging for high-reliability industrial/military PCB layouts.
Technical Context
The IDT7142SA100L48B implements a true dual-port SRAM architecture with fully independent address, control, and I/O buses per port - enabling simultaneous, non-blocking access to any memory location. Its BUSY pin functions exclusively as an input (unlike the IDT7132 master), used to inhibit writes when contention is detected by the master device.
It lacks internal port arbitration logic and relies entirely on external BUSY signaling from an IDT7132 master for conflict resolution. The device supports automatic power-down via chip enable (CE) control per port and retains full functionality across industrial temperature range (–40°C to +85°C) at 100 ns speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (2048 words × 8 bits = 16,384 bits total) |
| Max Read Cycle Time (tRC) | 100 ns - defines minimum interval between successive reads on same port |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; no auxiliary supplies required |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Standby Current (ISB3) | 1.0 mA (typ.) - ultra-low power consumption when both ports disabled with CMOS-level inputs |
| Input/Output Compatibility | TTL - interfaces directly with standard 5V logic families without level shifters |
| Package Type | 48-lead flatpack (FP48) - hermetically sealed, leadless ceramic package for high-reliability applications |
Pinout & Package
Package: 48-lead flatpack (FP48), body dimensions ≈ 0.75 in × 0.75 in × 0.11 in, ceramic hermetic construction with side-brazed leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for both ports; all GND pins must be connected to system ground plane |
| CER (Pin 2) | Right port chip enable | Active-low enable for right port; drives port into standby (ISB1/ISB2/ISB3) when high |
| CEL (Pin 3) | Left port chip enable | Active-low enable for left port; controls power state and memory access eligibility |
| OEL (Pin 4) | Left port output enable | Active-low control for tri-state output drivers on left I/O bus (I/O0L–I/O7L) |
| A0L–A10L (Pins 5,19–29) | Left port address inputs | 11-bit address bus selecting one of 2048 locations for left port access |
| OER (Pin 30) | Right port output enable | Active-low control for tri-state output drivers on right I/O bus (I/O0R–I/O7R) |
| R/WL (Pin 31) | Left port read/write control | High = read, low = write; determines direction of data flow on left I/O bus |
| R/WR (Pin 32) | Right port read/write control | High = read, low = write; determines direction of data flow on right I/O bus |
| I/O0L–I/O7L (Pins 33–40) | Left port bidirectional data | 8-bit parallel data bus; driven during write, tri-stated or driven during read per OEL |
| BUSYL (Pin 41) | Left port BUSY input | Active-low signal from master device; inhibits left-port writes when asserted |
| BUSYR (Pin 42) | Right port BUSY input | Active-low signal from master device; inhibits right-port writes when asserted |
| VCC (Pin 43) | Power supply | +5V ±10% supply; all VCC pins must be decoupled locally with 0.1 µF ceramic capacitor |
| I/O0R–I/O7R (Pins 44–48, 6–10) | Right port bidirectional data | 8-bit parallel data bus; driven during write, tri-stated or driven during read per OER |
| A0R–A10R (Pins 11–18, 20–23) | Right port address inputs | 11-bit address bus selecting one of 2048 locations for right port access |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only dual-port architecture | Eliminates need for external arbitration logic when paired with IDT7132 master; simplifies 16-bit+ memory expansion |
| BUSY input pins (BUSYL/BUSYR) | Direct hardware write-inhibit mechanism synchronized to master's contention detection - prevents data corruption without software intervention |
| Independent port power control | Per-port CE enables selective power-down (ISB2/ISB4), reducing active current in asymmetric access patterns |
| 100 ns access timing | Enables integration into real-time DSP and communications subsystems with tight memory latency budgets |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in harsh environments including motor control and avionics |
| Hermetic FP48 packaging | Provides long-term moisture resistance and thermal stability for mission-critical deployments where plastic packages are unsuitable |
Applications
| Digital Signal Processing (DSP) Co-Processing | Real-Time Industrial Motion Control |
|---|---|
|
Use Scenario: Two independent processors (e.g., DSP and microcontroller) concurrently access shared filter coefficient and sample buffer memory. IC Role / Device Role / Timing Role: IDT7142SA100L48B serves as SLAVE in a dual-ported memory subsystem synchronized to IDT7132 master, enabling zero-wait-state data exchange. Use Value: Eliminates software-managed semaphores and polling delays, guaranteeing deterministic memory access timing critical for servo loop execution. |
Use Scenario: PLC-based motion controller requires simultaneous access to position setpoints (from host) and encoder feedback (from FPGA) within a single memory space. IC Role / Device Role / Timing Role: IDT7142SA100L48B provides isolated, conflict-free read/write paths for host CPU and field-programmable gate array using hardware BUSY arbitration. Use Value: Prevents race conditions during high-frequency position updates (≥10 kHz), ensuring sub-microsecond synchronization accuracy. |
| Military Radar Front-End Buffering | Avionics Data Acquisition Interface |
|
Use Scenario: Radar pulse processor and beamformer ASIC share raw ADC samples and processed FFT bins in real time under MIL-STD-810 environmental stress. IC Role / Device Role / Timing Role: IDT7142SA100L48B operates as SLAVE in a radiation-tolerant, hermetically sealed FP48 package, interfacing with IDT7132 master for bus-width expansion. Use Value: Maintains data integrity across –55°C to +125°C operating range while supporting 100 ns throughput for high-resolution pulse compression. |
Use Scenario: Flight data recorder captures sensor telemetry (pressure, temperature, attitude) and pilot inputs simultaneously into shared memory for timestamped correlation. IC Role / Device Role / Timing Role: IDT7142SA100L48B acts as SLAVE in a dual-ported buffer, accepting analog-to-digital conversion results on one port and flight management system commands on the other. Use Value: Enables atomic capture of time-aligned datasets without CPU intervention, satisfying DO-178C traceability requirements for safety-critical logging. |
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 CY7C136-100AXC | 100 ns access, 2K × 8, but uses 52-pin PLCC; lacks dedicated BUSY input - requires external arbitration logic | Suitable for new designs without legacy IDT7132 master dependency; not drop-in compatible due to pinout and BUSY architecture mismatch | Select when redesigning from scratch and prioritizing PLCC availability over footprint compatibility with existing IDT-based layouts |
| ISSI IS61LV25616AL-10TLI | Asynchronous 256K × 16, 10 ns access, 5V-tolerant I/O, but single-port only - no native dual-port capability | Requires external dual-port controller (e.g., FPGA) to emulate concurrent access; increases BOM count and design complexity | Choose only if migrating to higher-density memory and willing to implement custom arbitration in programmable logic |
Compared with CY7C136-100AXC and IS61LV25616AL-10TLI, the IDT7142SA100L48B delivers hardware-enforced, zero-software-overhead dual-port operation with guaranteed BUSY-driven write inhibition - a unique advantage for deterministic real-time systems where timing predictability outweighs density or speed upgrades.
Availability
IDT7142SA100L48B is available at Aetrix Electronics and suitable for digital signal processing, industrial motion control, and military radar systems requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.
Supply support for IDT7142SA100L48B 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 high-performance timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered dual-port SRAM architectures for real-time embedded systems.
The IDT7142SA100L48B belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for MASTER/SLAVE memory expansion in deterministic, multi-processor environments such as defense electronics and industrial automation.
FAQ
What is the function of the BUSY pins on the IDT7142SA100L48B?
The BUSYL and BUSYR pins on the IDT7142SA100L48B are dedicated inputs - not outputs - used to receive active-low BUSY signals from an IDT7132 master device. When asserted, they internally inhibit write operations on the corresponding port, preventing data corruption during address contention. This hardware-level arbitration eliminates the need for software polling or external logic gates in MASTER/SLAVE configurations.
Can the IDT7142SA100L48B operate as a standalone dual-port RAM without an IDT7132 master?
Yes, the IDT7142SA100L48B can operate independently as a dual-port SRAM, supporting full asynchronous read/write access on both ports. However, it lacks on-chip arbitration logic and BUSY output capability. In standalone mode, designers must implement external contention management - either through system-level protocol (e.g., handshaking) or FPGA-based arbitration - since the IDT7142SA100L48B does not generate BUSY signals to resolve conflicts.
What is the maximum operating temperature range certified for the IDT7142SA100L48B?
The IDT7142SA100L48B is certified for industrial temperature operation from –40°C to +85°C. This rating is explicitly confirmed in the datasheet's "Recommended Operating Temperature and Supply Voltage" table and applies to the SA speed grade (100 ns) in the FP48 package. It is not rated for military-grade –55°C to +125°C operation - that specification applies only to designated MIL-PRF-38535 QML versions with different part numbering.
How does the power consumption of the IDT7142SA100L48B compare between active and standby modes?
In active mode (both ports enabled, outputs driving), the IDT7142SA100L48B draws 65 mA typical dynamic current (ICC). In full standby (both CEs high, all inputs at CMOS levels), it consumes only 1.0 mA typical (ISB3). This 65× reduction enables significant power savings in systems with bursty memory access patterns, especially when combined with per-port CE control to disable unused ports individually.
Is the IDT7142SA100L48B pin-compatible with other members of the IDT7142 family, such as the IDT7142SA55L48B?
Yes, all IDT7142SAxxL48B variants - including IDT7142SA100L48B, IDT7142SA55L48B, and IDT7142SA35L48B - share identical 48-pin flatpack (FP48) pinouts and electrical interface definitions. Speed grade differences (100 ns vs. 55 ns vs. 35 ns) affect only timing parameters (tRC, tAA, etc.) and do not alter pin function, voltage thresholds, or DC characteristics, enabling direct replacement in layout-constrained designs where timing margin allows.
7142SA100L48B 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)
7142SA100L48B FAQ
1.How can I place an order for 7142SA100L48B through Aetrix?
Please submit a Request for Quotation (RFQ) for 7142SA100L48B 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 7142SA100L48B reliable?
The price and inventory of 7142SA100L48B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7142SA100L48B is usually 5 days.
3.What payment methods are accepted for 7142SA100L48B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7142SA100L48B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7142SA100L48B?
7142SA100L48B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7142SA100L48B 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 7142SA100L48B?
For technical support, including 7142SA100L48B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7142SA100L48B requirements.
6.How does Aetrix verify that 7142SA100L48B is sourced from the original manufacturer or authorized distributors?
All 7142SA100L48B 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 7142SA100L48B meets industry standards.
7.What is the process for return or replacement of 7142SA100L48B?
All 7142SA100L48B units undergo pre-shipment inspection (PSI). If there is an issue with 7142SA100L48B, 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 7142SA100L48B part is unused and in its original packaging.
Return procedure for 7142SA100L48B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7142SA100L48B Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C08C-STUM-T
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