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Renesas 7132SA100JI8
- Part No.:
- 7132SA100JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7132SA100JI8.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,530
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Product details
Overview
7132SA100JI8 from IDT is a high-speed 2K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, BUSY output flag (open-drain), and 100 ns maximum read/write cycle time. It operates at 5V ±10%, supports industrial temperature range (–40°C to +85°C), and is packaged in a 48-pin ceramic LCC (LC48). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7142 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7132SA100JI8 datasheet, 7132SA100JI8 pinout, 7132SA100JI8 application, or 7132SA100JI8 equivalent, key selection considerations include its master-side BUSY arbitration timing (tBAA ≤ 100 ns), open-drain BUSY output requiring 270 Ω pull-up, dual independent port access without external logic, and compatibility with width-expansion topologies using IDT7142 slaves.
Technical Context
The 7132SA100JI8 implements hardware-based port arbitration via dedicated BUSY outputs (BUSYL/BUSYR) that assert asynchronously upon address contention - independent of R/W state - enabling deterministic resolution between left and right ports. Its CMOS design delivers 325 mW typical active power and 5 mW typical standby power under TTL-compatible signaling.
As a MASTER-only device, it integrates arbitration priority setup (tAPS = 5 ns), BUSY access/disable timing referenced to address or chip enable (tBAA/tBAC ≤ 100 ns), and automatic power-down controlled by CE. It does not support battery backup - that function is exclusive to LA variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 8 bits (2048 words × 8 data lines) - provides compact dual-access buffer for real-time inter-processor communication. |
| Max Read/Write Cycle | 100 ns - guarantees deterministic latency for time-critical control loops in industrial PLCs and avionics interfaces. |
| Supply Voltage | 5.0 V ±10% - compatible with legacy 5V TTL/CMOS system rails without level-shifting circuitry. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor drives and factory automation controllers. |
| Active Power (Typ) | 325 mW - enables thermal management in dense PCB layouts without forced air cooling. |
| Standby Current (Typ) | 5 mA (ISB1) - reduces system-level quiescent consumption during idle periods in battery-backed subsystems. |
| BUSY Output Type | Open-drain (requires 270 Ω pull-up) - allows wired-OR expansion across multiple MASTER devices in depth-expanded arrays. |
Pinout & Package
7132SA100JI8 is housed in a 48-pin ceramic LCC (Leadless Chip Carrier, package code LC48), body size ≈ 14.3 mm × 14.3 mm × 17.3 mm, with leads arranged in a square perimeter and no external leads - soldered via metallized pads on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right Port) | Active-low enables respective port; controls power-down mode when high - critical for selective port gating in asymmetric workloads. |
| OEL / OER | Output Enable (Left/Right Port) | Active-low enables I/O drivers; allows high-impedance tri-state during shared-bus arbitration or debug probing. |
| R/WL / R/WR | Read/Write Control (Left/Right Port) | Active-low initiates write; high enables read - defines directionality per port without external decode logic. |
| BUSYL / BUSYR | BUSY Flag Output (Left/Right Port) | Open-drain outputs asserting low during address contention - used to stall host processors or gate write pulses externally. |
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right Port) | 11-bit address buses (2048 locations); independent addressing enables simultaneous access to different memory regions. |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O Lines (Left/Right Port) | Bidirectional 8-bit data paths - support concurrent read-from-one-port/write-to-other-port operations. |
| VCC / GND | Power Supply Pins | Multiple VCC/GND pins (per datasheet note) ensure low-impedance supply distribution and reduce switching noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Eliminates need for external glue logic in dual-CPU or DSP+FPGA memory-sharing architectures. |
| Independent asynchronous port access | Enables full-bandwidth concurrent reads/writes to disjoint addresses - essential for lock-free inter-process communication buffers. |
| Open-drain BUSY outputs with 270 Ω pull-up requirement | Supports wired-OR BUSY aggregation across multiple MASTER devices in depth-expanded memory banks. |
| TTL-compatible 5V operation | Direct interface with legacy microcontrollers (e.g., 80C188, TMS320C25) and FPGAs without level translators. |
| Industrial temperature qualification (–40°C to +85°C) | Validated for deployment in harsh environments including railway signaling, industrial robotics, and energy metering. |
Applications
| Real-Time Inter-Processor Communication | Dual-Core DSP Memory Sharing |
|---|---|
|
Use Scenario: Two independent CPUs exchange status and command data via shared memory without software locks or polling overhead. IC Role / Device Role / Timing Role: 7132SA100JI8 acts as MASTER dual-port RAM providing atomic read/write arbitration and BUSY-driven synchronization between CPU-A (left port) and CPU-B (right port). Use Value: Eliminates race conditions during simultaneous access to same address, ensuring deterministic response within 100 ns worst-case arbitration delay. |
Use Scenario: A primary DSP offloads FFT computation to a secondary DSP while sharing input/output buffers in real time. IC Role / Device Role / Timing Role: 7132SA100JI8 serves as low-latency shared memory with independent 8-bit I/O ports - one connected to each DSP's external memory bus. Use Value: Enables pipelined processing with zero-cycle interlock overhead; 100 ns cycle time sustains >10 MB/s sustained throughput per port. |
| Avionics Data Acquisition Buffer | Industrial PLC I/O Mapping Memory |
|
Use Scenario: Sensor data from analog front-end is continuously written by an ADC controller while flight control software reads latest values. IC Role / Device Role / Timing Role: 7132SA100JI8 functions as MASTER buffer with BUSYL asserted during write contention - stalling ADC writes until flight software completes read. Use Value: Guarantees data coherency without software intervention; open-drain BUSY supports integration into existing ARINC-429 or MIL-STD-1553 timing chains. |
Use Scenario: Programmable Logic Controller maintains mirrored I/O image across CPU and safety monitor modules using shared memory. IC Role / Device Role / Timing Role: 7132SA100JI8 operates as MASTER RAM with CEL/CER driven by separate FPGA address decoders - enabling independent scan-cycle updates. Use Value: Supports SIL2-certifiable architectures by isolating I/O update timing from CPU execution cycles; 5 mW standby current extends uptime in battery-backed fail-safe modes. |
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 | 100 ns access, 2K × 8, but lacks on-chip arbitration logic and BUSY outputs - requires external logic for contention resolution. | Suitable only in systems where software-managed mutual exclusion is acceptable; not drop-in for hardware-arbitrated designs. | Select only if redesigning arbitration layer is feasible and board space permits discrete logic. |
| IDT7142SA100JI8 | Same speed grade and package, but SLAVE-only: BUSY pins are inputs (not outputs), no arbitration logic, no tBAA/tBDA timing parameters. | Must be paired with a 7132-series MASTER; cannot operate standalone as arbitration node. | Use exclusively as width-expansion slave alongside 7132SA100JI8 - never as functional substitute. |
Compared with CY7C133-100JC and IDT7142SA100JI8, the 7132SA100JI8 uniquely delivers integrated hardware arbitration and open-drain BUSY signaling - eliminating external logic while enabling deterministic, cycle-accurate contention resolution in real-time embedded systems.
Availability
7132SA100JI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data acquisition systems, and dual-core DSP communication buffers requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 7132SA100JI8 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 IDT7132 family was designed specifically for deterministic, low-latency dual-processor memory sharing - emphasizing hardware arbitration, 5V TTL compatibility, and robust industrial temperature operation.
FAQ
What is the function of BUSYL and BUSYR on the 7132SA100JI8?
BUSYL and BUSYR are open-drain outputs on the 7132SA100JI8 that assert low when address contention occurs on the respective port - indicating the opposite port has initiated an overlapping access. They require 270 Ω pull-up resistors and are used to stall external controllers or inhibit write pulses. These signals are absent on SLAVE devices like IDT7142.
Can the 7132SA100JI8 operate in battery backup mode?
No, the 7132SA100JI8 does not support battery backup. Only LA-suffix variants (e.g., 7132LA100JI8) provide 2V data retention capability. The SA version is optimized for higher-speed operation and standard 5V supply - battery retention is explicitly excluded per datasheet Section "Data Retention Characteristics (LA Version Only)".
Is the 7132SA100JI8 pin-compatible with the 7142SA100JI8?
No - although both share the same 48-pin LC48 package and identical pin numbering, their BUSY pin functionality differs fundamentally: 7132SA100JI8 has BUSYL/BUSYR as open-drain outputs, while 7142SA100JI8 has them as inputs. Swapping them without redesigning the BUSY routing and pull-up network will cause functional failure.
What is the minimum required pull-up resistor value for BUSY outputs on the 7132SA100JI8?
The datasheet specifies a 270 Ω pull-up resistor for BUSY outputs on the 7132SA100JI8, verified for proper VOL ≤ 0.5 V at IOL = 16 mA. Using higher resistance may violate timing or noise margin requirements, especially in noisy industrial environments or when driving multiple loads in wired-OR configurations.
Does the 7132SA100JI8 support simultaneous read and write to the same memory location?
No - simultaneous access to the same address triggers BUSY arbitration, allowing only one port to complete the operation. The 7132SA100JI8 uses hardware priority logic (tAPS = 5 ns) to determine the winner; the losing port's write is internally gated, and its BUSY output asserts to signal the conflict. This prevents data corruption but requires external handling of the BUSY signal.
7132SA100JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7132SA100JI8 FAQ
1.How can I place an order for 7132SA100JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7132SA100JI8 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 7132SA100JI8 reliable?
The price and inventory of 7132SA100JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7132SA100JI8 is usually 5 days.
3.What payment methods are accepted for 7132SA100JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7132SA100JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7132SA100JI8?
7132SA100JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7132SA100JI8 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 7132SA100JI8?
For technical support, including 7132SA100JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7132SA100JI8 requirements.
6.How does Aetrix verify that 7132SA100JI8 is sourced from the original manufacturer or authorized distributors?
All 7132SA100JI8 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 7132SA100JI8 meets industry standards.
7.What is the process for return or replacement of 7132SA100JI8?
All 7132SA100JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7132SA100JI8, 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 7132SA100JI8 part is unused and in its original packaging.
Return procedure for 7132SA100JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7132SA100JI8 Tags
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