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Renesas 71124S15YG
- Part No.:
- 71124S15YG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S15YG.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,860
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Product details
Overview
71124S15YG 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), 5 V single-supply operation, TTL-compatible I/O, and bidirectional data bus - used in legacy embedded controllers, industrial PLC memory buffers, and instrumentation data capture systems.
For engineers reviewing the 71124S15YG datasheet, 71124S15YG pinout, 71124S15YG application, or 71124S15YG equivalent, key selection criteria include access time consistency (tAA = tRC = 15 ns), low standby current (ISB1 = 10 mA), SOJ-32 package compatibility, and absence of refresh or clock requirements in asynchronous memory subsystems.
Technical Context
The 71124S15YG implements fully static asynchronous circuitry with no clocks or refresh cycles required. Its architecture features independent chip select (CS) and output enable (OE) controls, enabling fast read cycles (tOE = 7 ns) and precise write timing governed by WE-controlled or CS-controlled waveforms.
JEDEC-compliant center-power/ground pinout reduces simultaneous switching noise; all inputs and outputs are TTL-compatible with VIH ≥ 2.2 V and VIL ≤ 0.8 V at VCC = 5.0 V ±10%. Standby modes include TTL-level (ISB = 40 mA) and CMOS-level (ISB1 = 10 mA) power-down states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide parallel interface |
| Access / Cycle Time | 15 ns (commercial grade), equal tAA and tRC - enables deterministic timing in synchronous bus designs |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V TTL logic rails without level translation |
| Standby Current | ISB1 = 10 mA (CMOS-level deselect) - supports low-power hold mode during system sleep |
| I/O Compatibility | TTL-compatible inputs/outputs - direct interfacing with 74LS/74HC families without buffers |
| Operating Temperature | 0°C to +70°C - validated for commercial-grade industrial control panels and test equipment |
| Package | 32-pin 400-mil Plastic SOJ (PBG32) - surface-mountable with industry-standard reflow profile |
Pinout & Package
71124S15YG is housed in a 32-pin Plastic SOJ (PBG32) package with JEDEC-revolutionary center-power/ground layout - VCC and GND pins located at pins 11 and 20 respectively to minimize supply noise coupling across the address/data bus.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS or OE inactive |
| CS | Chip Select | Active-low enable for device selection; controls power-up/down timing (tPU/tPD) |
| OE | Output Enable | Active-low control for output drivers only; allows read access without deselecting chip |
| WE | Write Enable | Active-low signal initiating write cycle; defines tWP, tDW, and tDH timing windows |
| VCC | Power Supply | Pin 11: +5 V supply; center location reduces IR drop and ground bounce |
| GND | Ground | Pin 20: reference return; paired with VCC for noise suppression per JEDEC spec |
Key Features
| Feature | Design Value |
|---|---|
| Equal access and cycle times | tAA = tRC = 15 ns eliminates timing margin trade-offs in bus arbitration logic |
| Center-power/ground pinout | VCC (pin 11) and GND (pin 20) placement minimizes simultaneous switching noise on 8-bit data bus |
| Dual enable architecture | Separate CS and OE pins allow partial memory mapping and dynamic output gating without deselection |
| CMOS-level standby mode | ISB1 = 10 mA at CMOS-level CS deassertion enables ultra-low-power hold during CPU idle cycles |
| Single 5 V supply | No auxiliary voltages required - simplifies PCB power delivery and eliminates charge pump complexity |
Applications
| Industrial PLC Data Buffer | Legacy Test Equipment Memory |
|---|---|
Use Scenario: Storing real-time sensor acquisition data between scan cycles in programmable logic controllers with 5 V backplane buses. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state storage with deterministic 15 ns read/write timing. Use Value: Eliminates need for wait-state generators or clock-domain bridging; matches legacy 80C188/80C186 bus timing envelopes. | Use Scenario: Holding calibration coefficients and waveform samples in benchtop oscilloscopes and DMMs built before 2010. IC Role / Device Role / Timing Role: Non-refresh volatile memory serving as firmware scratchpad and measurement buffer with TTL-level interfacing. Use Value: Direct replacement for obsolete 62256-family parts; same SOJ-32 footprint and 5 V operation avoids board redesign. |
| Embedded Controller Boot RAM | Communications Protocol Analyzer Buffer |
Use Scenario: Providing temporary code execution space during bootloader initialization in fixed-function microcontroller-based gateways. IC Role / Device Role / Timing Role: Static RAM mapped into upper memory space for stack and variable storage prior to SDRAM initialization. Use Value: Fully static operation ensures reliable boot sequence under voltage ramp conditions where clocks may be unstable. | Use Scenario: Capturing serial protocol frames (RS-232/RS-485) in real time for analysis in field-deployable diagnostic tools. IC Role / Device Role / Timing Role: High-speed circular buffer memory accepting burst writes from UART FIFOs with minimal latency. Use Value: 15 ns cycle time supports sustained 1 Mbps serial capture without data loss under worst-case interrupt latency. |
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 time, 3.3 V supply, TSOP-32 package | Requires level-shifting for 5 V systems; lower power but slower timing | Select only if migrating to 3.3 V architecture and relaxing timing constraints |
| AS6C1008-15PCN | 15 ns access, 5 V supply, SOJ-32 package, but no center-power pinout | Higher noise susceptibility in dense 8-bit bus layouts; identical timing and voltage specs | Drop-in replacement for footprint and timing, but verify noise margins in high-speed routing |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-15PCN, the 71124S15YG uniquely delivers 15 ns performance at 5 V in a noise-optimized SOJ-32 package - making it the only choice for maintaining legacy 5 V system timing integrity while minimizing EMI in compact industrial enclosures.
Availability
71124S15YG is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy test equipment memory upgrades, and embedded controller boot RAM requiring stable component supply across extended product lifecycles.
Supply support for 71124S15YG 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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The 71124S15YG belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for 5 V TTL-based embedded systems requiring deterministic, no-refresh memory with JEDEC-standardized noise-reduction packaging.
FAQ
What is the maximum operating frequency supported by the 71124S15YG?
The 71124S15YG does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by its 15 ns cycle time (tRC), corresponding to a theoretical maximum bus rate of ~66.7 MHz for consecutive random accesses. Real-world bandwidth depends on address setup/hold and control signal timing margins defined in the AC Electrical Characteristics table.
Does the 71124S15YG require external refresh circuitry?
No, the 71124S15YG is a fully static RAM and requires no refresh cycles or clocks for data retention. As long as VCC remains within 4.5–5.5 V and temperature stays within 0°C to +70°C, data persists indefinitely while powered - a key advantage over DRAM in deterministic real-time systems.
Can the 71124S15YG be used in industrial temperature environments?
No - the 71124S15YG is rated only for commercial temperature range (0°C to +70°C). Industrial-grade variants exist for the same speed grade (e.g., 71124S15YGI), but the YG suffix explicitly denotes commercial grade. Using 71124S15YG outside its specified range risks parameter drift and data corruption.
What is the purpose of the center-power/ground pinout in the 71124S15YG?
The center-power/ground pinout (VCC at pin 11, GND at pin 20) in the 71124S15YG reduces simultaneous switching noise by symmetrically distributing supply and return paths across the 32-pin SOJ body. This layout minimizes ground bounce on the 8-bit I/O bus and improves signal integrity in high-density PCB layouts with tight timing budgets.
Is the 71124S15YG pin-compatible with the 71124S20YG?
Yes - both 71124S15YG and 71124S20YG share identical 32-pin SOJ (PBG32) packaging, pin functions, and electrical interface. The only difference is timing: 71124S20YG has 20 ns access/cycle time versus 15 ns for 71124S15YG. They are functionally and physically interchangeable, though timing-critical designs must verify setup/hold margins with the slower variant.
71124S15YG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tube
- 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
71124S15YG FAQ
1.How can I place an order for 71124S15YG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S15YG 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 71124S15YG reliable?
The price and inventory of 71124S15YG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S15YG is usually 5 days.
3.What payment methods are accepted for 71124S15YG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S15YG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S15YG?
71124S15YG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S15YG 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 71124S15YG?
For technical support, including 71124S15YG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S15YG requirements.
6.How does Aetrix verify that 71124S15YG is sourced from the original manufacturer or authorized distributors?
All 71124S15YG 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 71124S15YG meets industry standards.
7.What is the process for return or replacement of 71124S15YG?
All 71124S15YG units undergo pre-shipment inspection (PSI). If there is an issue with 71124S15YG, 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 71124S15YG part is unused and in its original packaging.
Return procedure for 71124S15YG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S15YG Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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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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