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Renesas 71124S15YG8
- Part No.:
- 71124S15YG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S15YG8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,841
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Product details
Overview
71124S15YG8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with JEDEC center-power/ground pinout, 15 ns access time (commercial grade), TTL-compatible I/O, and single 5 V supply operation. It serves as main or cache memory in embedded controllers and industrial data acquisition systems requiring deterministic, no-refresh asynchronous operation.
For engineers reviewing the 71124S15YG8 datasheet, 71124S15YG8 pinout, 71124S15YG8 application, or 71124S15YG8 equivalent, key selection criteria include its 15 ns read cycle time, SOJ-32 package with center VCC/GND layout for noise reduction, low standby current (ISB = 40 mA), and compatibility with legacy 5 V TTL bus interfaces.
Technical Context
The 71124S15YG8 implements fully static asynchronous logic with no clocks or refresh required. Its architecture features independent chip select (CS) and output enable (OE) controls, enabling fast read cycles (tAA ≤ 15 ns, tOE ≤ 7 ns) and precise write timing via WE-controlled or CS-controlled protocols.
It uses high-reliability CMOS fabrication with bidirectional TTL-compatible I/O drivers, input/output leakage ≤ 5 µA, and guaranteed operation across 0°C to +70°C at VCC = 5.0 V ±10%. The center-power/ground pinout reduces simultaneous switching noise and improves signal integrity in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide parallel interface |
| Access Time (tAA) | ≤15 ns - determines minimum address-to-data valid delay in read operations |
| Read Cycle Time (tRC) | 15 ns - sets maximum sustained read throughput (66.7 MHz random access) |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V TTL logic rails without level shifting |
| Standby Current (ISB) | 40 mA - power consumption during deselected (CS HIGH) state at max VCC and fMAX |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal range for non-automotive industrial use |
| I/O Compatibility | TTL - direct interfacing with 74LS/74ALS logic families without buffers |
Pinout & Package
71124S15YG8 is housed in a 32-pin 400-mil Plastic SOJ (Small Outline J-Lead) package, designated PBG32, featuring JEDEC-standard center-power/ground pinout for reduced ground bounce and improved noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; direction controlled by CS/OE/WE states |
| CS | Chip Select | Active-low enable for device selection; initiates internal timing when asserted |
| OE | Output Enable | Active-low control for output drivers; enables read data within ≤7 ns of assertion |
| WE | Write Enable | Active-low signal controlling write latching; defines write cycle boundaries with CS |
| VCC | Power Supply | +5 V supply (pins 24 and 28); center-positioned to minimize IR drop and noise coupling |
| GND | Ground | Reference plane (pins 13 and 20); symmetric placement with VCC for balanced return paths |
Key Features
| Feature | Design Value |
|---|---|
| Revolutionary JEDEC pinout | Center-placed VCC and GND pins reduce simultaneous switching noise and improve signal integrity in high-density designs |
| Asynchronous static operation | No clock, no refresh, no wait states - simplifies timing design and guarantees deterministic latency |
| Dual control enable (CS + OE) | Enables fast output gating independent of chip selection, supporting burst reads and bus sharing |
| Low-power deselection (ISB1) | 10 mA full standby current at CMOS-level CS deassertion - ideal for power-gated subsystems |
| TTL-compatible I/O | Direct interface with legacy 5 V logic families; eliminates need for level translators or bus buffers |
Applications
| Industrial PLC Memory Buffer | Legacy Embedded Controller Cache |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers where deterministic memory access is critical. IC Role / Device Role / Timing Role: Primary data buffer storing ladder logic variables and process image with sub-20 ns access guarantee. Use Value: Eliminates refresh overhead and ensures consistent 15 ns read latency across temperature, enabling reliable scan-cycle timing compliance. | Use Scenario: Instruction/data caching in 8/16-bit microcontroller-based instrumentation systems using 5 V buses. IC Role / Device Role / Timing Role: Off-chip SRAM extending internal MCU memory with pin-compatible TTL interface and zero-wait-state operation. Use Value: Enables direct connection to MC68HC11, Z80, or 80C51 address/data buses without glue logic or voltage translation. |
| Medical Diagnostic Data Acquisition | Avionics Test Equipment Buffer |
Use Scenario: High-fidelity analog waveform capture in portable ECG or ultrasound front-ends requiring glitch-free memory writes. IC Role / Device Role / Timing Role: High-speed circular buffer capturing ADC samples at up to 66.7 MSPS (burst mode) with precise WE-controlled write timing. Use Value: Guaranteed tDW ≥ 8 ns and tWP ≥ 12 ns ensure reliable data capture even under worst-case voltage/temperature conditions. | Use Scenario: Built-in self-test (BIST) pattern storage and result logging in airborne maintenance diagnostic units. IC Role / Device Role / Timing Role: Non-volatile-equivalent scratchpad memory holding test vectors and pass/fail flags during power cycling. Use Value: Low ISB (40 mA) and ISB1 (10 mA) modes support battery-backed operation with minimal quiescent drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZSXIT | 45 ns access, 3.3 V core (with 5 V tolerant I/O), TSOP-II-32 package | Requires level-shifting or mixed-supply design; lower power but slower speed | Select when migrating to 3.3 V systems or prioritizing standby current over speed |
| AS6C1008-15PCN | 15 ns access, 5 V only, SOP-32 package, no center-power pinout | Higher noise susceptibility due to conventional pinout; identical timing and voltage specs | Select when board layout constraints prohibit SOJ or require standard SOP footprint |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-15PCN, the 71124S15YG8 uniquely delivers 15 ns performance in a noise-optimized SOJ-32 package with native 5 V TTL compatibility-making it optimal for legacy industrial upgrades where timing, noise margin, and drop-in replacement are jointly critical.
Availability
71124S15YG8 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy embedded controller caches, and medical diagnostic data acquisition systems requiring stable component supply and long-lifecycle support.
Supply support for 71124S15YG8 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
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The 71124S15YG8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for deterministic, no-refresh memory expansion in 5 V TTL-based industrial and instrumentation systems.
FAQ
What is the operating voltage range for the 71124S15YG8?
The 71124S15YG8 operates across a supply voltage range of 4.5 V to 5.5 V, fully compliant with standard 5 V TTL logic rails. This allows direct integration into legacy 5 V systems without voltage regulation or level translation. All DC and AC specifications-including tAA ≤ 15 ns and ISB = 40 mA-are guaranteed within this range at 0°C to +70°C. The 71124S15YG8 does not support 3.3 V operation.
Does the 71124S15YG8 require a clock or refresh signal?
No, the 71124S15YG8 uses fully static CMOS circuitry and requires neither a clock nor periodic refresh. It retains data indefinitely while powered and selected, making it suitable for applications demanding deterministic latency and zero wait-state operation. This architecture eliminates timing complexity associated with DRAM or pseudo-static RAM, and is explicitly confirmed in the functional description of the 71124S15YG8 datasheet.
What is the meaning of "center power/ground" pinout in the 71124S15YG8?
The center power/ground pinout places VCC on pins 24 and 28, and GND on pins 13 and 20-symmetrically positioned near the middle of the 32-pin SOJ package. This layout minimizes ground bounce and power rail noise during high-speed I/O transitions. The 71124S15YG8 datasheet explicitly cites this JEDEC-revolutionary arrangement as key to improving system-level signal integrity in noise-sensitive industrial environments.
Can the 71124S15YG8 be used in industrial temperature applications?
No-the 71124S15YG8 is specified only for the commercial temperature range (0°C to +70°C). Although the broader IDT71124 family includes industrial-grade variants (e.g., 71124S15YGI), the suffix "YG8" denotes the commercial-grade, tube-packaged version. The datasheet's Ordering Information table confirms that 71124S15YG8 carries the "C" temperature grade, and footnote 1 explicitly restricts industrial qualification to part numbers ending in "I" or "I8".
What are the key timing parameters that define read performance of the 71124S15YG8?
The 71124S15YG8 guarantees tAA ≤ 15 ns (address access time), tRC = 15 ns (read cycle time), and tOE ≤ 7 ns (output enable delay). These values establish hard limits on random read latency and sustained throughput. All are measured under VCC = 5.0 V ±10% and TA = +25°C, with production testing ensuring compliance. The 71124S15YG8 datasheet's AC Electrical Characteristics table (Table 09) lists these as maximum values for the "Com'l." column.
71124S15YG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
71124S15YG8 FAQ
1.How can I place an order for 71124S15YG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S15YG8 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 71124S15YG8 reliable?
The price and inventory of 71124S15YG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S15YG8 is usually 5 days.
3.What payment methods are accepted for 71124S15YG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S15YG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S15YG8?
71124S15YG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S15YG8 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 71124S15YG8?
For technical support, including 71124S15YG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S15YG8 requirements.
6.How does Aetrix verify that 71124S15YG8 is sourced from the original manufacturer or authorized distributors?
All 71124S15YG8 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 71124S15YG8 meets industry standards.
7.What is the process for return or replacement of 71124S15YG8?
All 71124S15YG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71124S15YG8, 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 71124S15YG8 part is unused and in its original packaging.
Return procedure for 71124S15YG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S15YG8 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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