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Renesas 7140SA100PF
- Part No.:
- 7140SA100PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7140SA100PF.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
7140SA100PF from IDT is a 1K × 8 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting fully asynchronous left/right port access with 100 ns max read/write cycle time, 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory systems without external arbitration logic.
For engineers reviewing the 7140SA100PF datasheet, 7140SA100PF pinout, 7140SA100PF application, or 7140SA100PF equivalent, key selection criteria include BUSY input behavior, CE/R/W-controlled write timing, port-to-port contention resolution, and compatibility with IDT7130 MASTER devices in high-reliability embedded control and real-time communication interfaces.
Technical Context
The 7140SA100PF operates as a SLAVE dual-port SRAM with dedicated BUSY inputs (BUSYL, BUSYR) that inhibit writes when asserted low-unlike the MASTER IDT7130 which drives open-drain BUSY outputs. Its arbitration relies entirely on external BUSY signaling from the MASTER device.
It supports independent TTL-compatible control per port: left port uses CEL/OEL/R/WL; right port uses CER/OER/R/WR. Address ranges are A0L–A9L (left) and A0R–A9R (right), each decoding 1K locations. No on-chip arbitration logic is present-this function resides solely in the MASTER IDT7130.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8 data lines) per port - supports byte-wide independent access on left and right sides. |
| Access Time | 100 ns maximum read/write cycle time - defines minimum clock period for synchronous interface designs or worst-case latency in asynchronous systems. |
| Supply Voltage | 5.0 V ±10% - requires single-rail 4.5–5.5 V supply; no separate I/O or core voltage rails. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including motor control, PLCs, and telecom infrastructure. |
| Standby Current | 20 mA max (ISB1, TTL-level CE high) - determines power budget during idle periods in battery-adjacent or low-power subsystems. |
| Bus Interface | TTL-compatible inputs/outputs - ensures direct connection to legacy 5 V microcontrollers, FPGAs, and ASICs without level-shifting. |
| BUSY Role | BUSY inputs only (BUSYL/BUSYR) - must be driven by external MASTER device; asserts write inhibition when low. |
Pinout & Package
7140SA100PF is packaged in a 48-pin ceramic flatpack (FP48), measuring approximately 0.75 in × 0.75 in × 0.11 in, with through-hole mounting and hermetic sealing suitable for high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins required for noise immunity and thermal dissipation in dual-port operation. |
| VCC (Pin 25) | Power supply | Single 5 V supply pin; all VCC connections must be decoupled locally to minimize switching noise. |
| CEL, CER | Chip enable (left/right) | Active-low enables per port; controls dynamic current draw and port activation independently. |
| OEL, OER | Output enable (left/right) | Active-low tri-states I/O drivers; allows shared bus usage without external bus transceivers. |
| R/WL, R/WR | Read/write direction (left/right) | Active-high = read, active-low = write; defines data flow direction for each port's I/O bus. |
| BUSYL, BUSYR | BUSY input (left/right) | Active-low write-inhibit signals from MASTER device; assertion blocks internal write latching. |
| INTL, INTR | Interrupt flag (left/right) | Open-drain outputs used for inter-port handshaking; require external pull-up resistors. |
| A0L–A9L, A0R–A9R | Address inputs (left/right) | 10-bit address buses decode full 1K space per port; no address multiplexing or refresh required. |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (left/right) | Bidirectional 8-bit data paths; electrically isolated between ports except via shared memory array. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only architecture | Eliminates need for on-chip arbitration logic-reduces complexity and cost when paired with IDT7130 MASTER in wide-data systems. |
| BUSY input-driven write control | Ensures deterministic port contention resolution: writes blocked only when MASTER asserts BUSY, preventing data corruption during simultaneous access. |
| Full 5 V TTL compatibility | Direct interface with legacy microcontrollers (e.g., 8051, 68K), FPGAs, and discrete logic without level shifters or translators. |
| Independent port power management | Each port can enter standby (ISB2/ISB4) separately via CE, enabling asymmetric power gating in multi-processor SoC subsystems. |
| Industrial temperature qualification | Validated operation from –40°C to +85°C supports deployment in harsh environments like factory automation and outdoor base stations. |
Applications
| Motor Control Interface | Real-Time Data Buffering |
|---|---|
Use Scenario: Dual-CPU motor drive system where DSP handles PWM generation and MCU manages safety monitoring and diagnostics. IC Role / Device Role / Timing Role: SLAVE dual-port SRAM provides shared parameter table and status register space accessible concurrently by both processors without software arbitration. Use Value: Enables sub-microsecond inter-processor data exchange with hardware-enforced write collision avoidance via BUSY signaling from MASTER. | Use Scenario: High-speed serial receiver buffering incoming telemetry packets before CRC validation and forwarding to host processor. IC Role / Device Role / Timing Role: Left port accepts streaming data from UART/FPGA; right port allows host CPU to read validated frames at its own pace. Use Value: Eliminates FIFO overflow risk during burst traffic by decoupling ingest and consume rates using independent asynchronous ports. |
| Digital Signal Processing Co-Processor | Redundant Safety Controller |
Use Scenario: FPGA-based signal processing pipeline feeding results to ARM Cortex-M7 for decision-making and logging. IC Role / Device Role / Timing Role: Acts as low-latency scratchpad memory between FPGA fabric and microcontroller, with left port mapped to FPGA Avalon-MM and right port to ARM AHB. Use Value: Achieves zero-wait-state access for both masters due to dedicated address/data buses-critical for real-time FFT or filtering loops. | Use Scenario: SIL-3 certified safety controller where primary and secondary MCUs cross-check sensor readings and actuator commands. IC Role / Device Role / Timing Role: Shared memory region stores mirrored sensor values and command history; BUSY arbitration prevents conflicting updates during fault transitions. Use Value: Hardware-guaranteed atomicity of safety-critical data writes eliminates race conditions that could compromise functional safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C130-100AXC | 1K × 8, 100 ns, 5 V, but includes on-chip arbitration logic and bidirectional BUSY I/O - functions as standalone dual-port, not SLAVE-only. | Does not require MASTER companion IC; suitable for single-device dual-access systems but lacks IDT7130/7140 MASTER/SLAVE scalability. | Select when full arbitration autonomy is needed and memory expansion beyond 8 bits is not required. |
| AS7C31025B-10JCN | 1M × 8, 10 ns, 3.3 V - higher density, faster, lower voltage; no BUSY arbitration support; asynchronous only. | Targeted at modern low-voltage SoCs; incompatible with 5 V TTL systems and cannot replace 7140SA100PF in MASTER/SLAVE topology. | Select for new 3.3 V designs prioritizing speed/density over legacy interface compatibility or hardware arbitration. |
Compared with CY7C130-100AXC and AS7C31025B-10JCN, the 7140SA100PF delivers unique value in scalable 16-bit+ memory systems where deterministic, hardware-enforced write collision avoidance between two independent 5 V masters is mandatory-and where the MASTER/SLAVE partitioning reduces per-device gate count and power.
Availability
7140SA100PF is available at Aetrix Electronics and suitable for motor control interfaces, real-time data buffering, digital signal processing co-processors, and redundant safety controllers requiring stable component supply across extended production lifecycles.
Supply support for 7140SA100PF 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7140 product line was designed specifically as SLAVE dual-port SRAMs to pair with IDT7130 MASTER devices, enabling seamless 16-bit-or-wider memory expansion in real-time embedded systems without added logic.
FAQ
What is the role of BUSY inputs on the 7140SA100PF?
The BUSY inputs (BUSYL and BUSYR) on the 7140SA100PF are active-low signals that directly inhibit write operations to the respective port when asserted. Unlike the MASTER IDT7130, the 7140SA100PF does not generate BUSY-it receives it. This design ensures deterministic contention resolution in MASTER/SLAVE configurations. The 7140SA100PF relies entirely on external BUSY assertion from the IDT7130 to prevent simultaneous writes to the same memory location.
Can the 7140SA100PF operate as a standalone dual-port SRAM without an IDT7130 MASTER?
No-the 7140SA100PF lacks on-chip arbitration logic and has no BUSY output capability. It is explicitly designed as a SLAVE device and requires an external MASTER (e.g., IDT7130) to drive its BUSY inputs and manage port contention. Attempting standalone use will result in uncontrolled write collisions and data corruption during simultaneous left/right port access to overlapping addresses.
What package type is used for the 7140SA100PF and why does it matter?
The 7140SA100PF uses a 48-pin ceramic flatpack (FP48) package, measuring approximately 0.75 in × 0.75 in × 0.11 in. This hermetically sealed package provides superior moisture resistance, thermal stability, and long-term reliability compared to plastic DIP or LCC variants-making it suitable for industrial, aerospace, and military applications where extended temperature cycling and environmental stress are expected.
How does the 7140SA100PF handle interrupt signaling between ports?
Interrupt signaling on the 7140SA100PF uses open-drain INTL and INTR outputs. Writing to specific address locations (e.g., A9–A0 = 3FFh on left port sets INTR; 3FEh on right port clears INTL) triggers flag assertion. These outputs require external pull-up resistors and are intended for inter-processor handshaking-not automatic arbitration. The 7140SA100PF does not auto-clear interrupts; software or external logic must reset them, preserving state integrity across power cycles.
Is the 7140SA100PF compatible with 3.3 V systems?
No-the 7140SA100PF is strictly a 5 V ±10% device with TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and 5 V output swing. It cannot be safely operated from a 3.3 V supply nor interfaced directly with 3.3 V logic without level translation. Its electrical characteristics, including ICC, ISB, and timing parameters, are specified only at 4.5–5.5 V, and operation outside this range may cause functional failure or accelerated wear.
7140SA100PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K 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:
- 64-TQFP (14x14)
7140SA100PF FAQ
1.How can I place an order for 7140SA100PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7140SA100PF 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 7140SA100PF reliable?
The price and inventory of 7140SA100PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7140SA100PF is usually 5 days.
3.What payment methods are accepted for 7140SA100PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7140SA100PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7140SA100PF?
7140SA100PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7140SA100PF 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 7140SA100PF?
For technical support, including 7140SA100PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7140SA100PF requirements.
6.How does Aetrix verify that 7140SA100PF is sourced from the original manufacturer or authorized distributors?
All 7140SA100PF 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 7140SA100PF meets industry standards.
7.What is the process for return or replacement of 7140SA100PF?
All 7140SA100PF units undergo pre-shipment inspection (PSI). If there is an issue with 7140SA100PF, 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 7140SA100PF part is unused and in its original packaging.
Return procedure for 7140SA100PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7140SA100PF Tags
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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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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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