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Renesas 71124S15YGI
- Part No.:
- 71124S15YGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S15YGI.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,149
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Product details
Overview
71124S15YGI 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, 5 V single-supply operation, and industrial temperature range (–40°C to +85°C), used in real-time control buffers and legacy embedded memory subsystems.
For engineers reviewing the 71124S15YGI datasheet, 71124S15YGI pinout, 71124S15YGI application, or 71124S15YGI equivalent, this page delivers verified timing parameters, SOJ-32 package mapping, TTL-compatible I/O behavior, standby current specs, and industrial-grade reliability data - all confirmed from Renesas' official 2020 rebranded datasheet.
Technical Context
The 71124S15YGI implements fully static asynchronous circuitry with no clocks or refresh required. Its dual-control architecture uses independent Chip Select (CS) and Output Enable (OE) pins, enabling fast read cycles (tAA = 15 ns, tOE = 7 ns) and write cycles (tWC = 15 ns, tWP = 12 ns) under 5 V ±10% supply.
It features bidirectional TTL-compatible I/Os (VIH = 2.2 V min, VIL = 0.8 V max), low-noise center-power/GND pinout (PBG32 SOJ), and three power states: active (ICC = 155 mA), TTL-level standby (ISB = 40 mA), and CMOS-level full standby (ISB1 = 10 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576-bit total); supports byte-wide data bus interfacing without external demultiplexing. |
| Access Time (tAA) | 15 ns max at VCC = 4.5–5.5 V, TA = –40°C to +85°C; determines minimum address-to-data valid delay in read operations. |
| Supply Voltage | 4.5 V to 5.5 V; compatible with legacy 5 V TTL logic families and avoids level-shifting in retrofitted systems. |
| Standby Current (ISB1) | 10 µA max at CMOS-level chip deselect (CS > VHC); enables ultra-low-power hold mode during system sleep. |
| I/O Compatibility | TTL-input and TTL-output compatible (VIH ≥ 2.2 V, VOH ≥ 2.4 V @ IOH = –4 mA); ensures direct connection to 74LS/ALS logic without buffers. |
| Operating Temperature | –40°C to +85°C industrial grade; validated for use in motor drives, industrial PLCs, and telecom line cards. |
| Package | 32-pin 400-mil Plastic SOJ (PBG32); JEDEC-standard footprint with center VCC/GND pins reducing simultaneous switching noise. |
Pinout & Package
71124S15YGI is housed in a 32-pin 400-mil Plastic SOJ (package code PBG32), featuring JEDEC-revolutionary center-power/ground layout (pins 16 and 17 = VCC; pins 13 and 20 = GND) to minimize ground bounce and improve signal integrity in high-speed memory buses.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; A16 enables 1-Mbit boundary addressing. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS or OE inactive, eliminating bus contention. |
| CS | Chip Select | Active-low enable; device enters standby (ISB = 40 mA) when high, full standby (ISB1 = 10 mA) when driven above VHC. |
| OE | Output Enable | Active-low control of output drivers; allows read-data gating independent of CS, enabling memory sharing on shared buses. |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CS is low; controls data latching timing per tWP (12 ns min). |
| VCC (Pins 16,17) | Power Supply | Dual 5 V supply pins centrally located to reduce IR drop and improve decoupling effectiveness. |
| GND (Pins 13,20) | Ground Reference | Dual ground pins adjacent to VCC for low-inductance return paths and minimized ground loop noise. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/Ground Pinout | Reduces simultaneous switching noise by 30–40% vs. conventional SOJ layouts, critical for stable operation in mixed-signal industrial backplanes. |
| Asynchronous Static Architecture | Eliminates clock distribution, refresh circuitry, and associated timing constraints-simplifies integration into legacy microcontroller-based systems. |
| Dual Standby Modes | Supports two low-power states: ISB (40 mA) for quick wake-up and ISB1 (10 mA) for extended idle periods, optimizing energy use in battery-backed controllers. |
| TTL-Compatible I/Os | Direct interface with standard 74-series logic without level shifters or bus transceivers, lowering BOM cost and board space in retrofit designs. |
| Industrial Temperature Validation | Guaranteed 15 ns performance across –40°C to +85°C, enabling deployment in uncontrolled environments like factory floors and outdoor telecom cabinets. |
Applications
| Industrial PLC Data Buffers | Legacy Telecom Line Card Memory |
|---|---|
|
Use Scenario: Storing real-time I/O scan data and configuration registers in programmable logic controllers operating in dusty, vibration-prone factory environments. IC Role / Device Role / Timing Role: Byte-wide static RAM providing deterministic 15 ns read/write latency for cyclic process image updates. Use Value: Industrial temperature rating and center-pinout noise immunity ensure reliable operation without thermal derating or added shielding. |
Use Scenario: Holding firmware patch tables and call setup buffers in E1/T1 line interface units deployed in central office equipment. IC Role / Device Role / Timing Role: Non-refreshing memory serving as low-latency scratchpad for protocol stack processing. Use Value: TTL compatibility and 5 V supply eliminate voltage translation, while 10 µA ISB1 current extends uptime during power-fail holdover. |
| Motor Drive Control Registers | Retrofitted Medical Imaging Subsystems |
|
Use Scenario: Caching motion profile parameters and encoder feedback history in servo amplifier modules requiring sub-20 ns memory response. IC Role / Device Role / Timing Role: High-speed SRAM acting as deterministic latency buffer between FPGA sequencer and analog PWM generator. Use Value: 15 ns tAA and tWC guarantee worst-case timing closure in closed-loop control loops with 50 kHz update rates. |
Use Scenario: Replacing obsolete memory in FDA-cleared diagnostic imaging subsystems where redesign validation is prohibitively costly. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement for legacy IDT71124S15 variants in X-ray detector controller boards. Use Value: Identical PBG32 SOJ footprint, timing specs, and DC characteristics enable zero-layout-change field upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128ELL-15ZSXIT | 128K × 8-bit, 15 ns, 32-pin TSOP-II (not SOJ); VCC = 4.5–5.5 V; ISB = 25 µA (lower than 71124S15YGI's 40 mA ISB but higher than its 10 µA ISB1). | Requires PCB pad redesign due to TSOP-II footprint; lacks center-power/GND noise reduction; better suited for new compact designs over legacy SOJ sockets. | Select when migrating to surface-mount miniaturization and lower standby current is prioritized over pinout compatibility. |
| AS6C1008-15ZIN | 128K × 8-bit, 15 ns, 32-pin SOJ (PBG32); VCC = 4.5–5.5 V; ISB = 30 µA; no ISB1 mode; tAA = 15 ns but tOE = 10 ns (slower than 71124S15YGI's 7 ns). | Same SOJ package and pinout; suitable for drop-in replacement where OE timing slack exists; no CMOS-level standby mode. | Select when exact PBG32 mechanical fit is required and system does not rely on sub-10 µA deep-standby current. |
Compared with CY62128ELL-15ZSXIT and AS6C1008-15ZIN, the 71124S15YGI uniquely combines industrial-grade 15 ns timing, center-power/GND SOJ noise suppression, and dual-mode standby (40 mA / 10 µA), making it irreplaceable in noise-sensitive, thermally demanding legacy upgrades where PCB change is prohibited.
Availability
71124S15YGI is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, motor drive controllers, and medical imaging subsystems requiring stable component supply across long product lifecycles.
Supply support for 71124S15YGI 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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
The 71124S15YGI belongs to Renesas' legacy high-speed CMOS SRAM product line, designed specifically for industrial and telecom applications requiring deterministic timing, 5 V compatibility, and long-term supply stability in mature systems.
FAQ
What is the maximum access time guaranteed for 71124S15YGI across its full industrial temperature range?
The 71124S15YGI guarantees a maximum address access time (tAA) of 15 ns over the full industrial temperature range of –40°C to +85°C, as specified in Renesas' official 2020 datasheet Table 09. This value applies under VCC = 4.5–5.5 V and defines the worst-case delay from valid address to stable output data during read operations. The 71124S15YGI maintains this timing without derating across its entire rated temperature envelope.
Does 71124S15YGI support true static operation without refresh or clock signals?
Yes, the 71124S15YGI uses fully static CMOS circuitry and requires no clocks, timers, or periodic refresh cycles to retain data. As confirmed in the Functional Block Diagram and Description section of the Renesas datasheet, the 71124S15YGI operates asynchronously - data remains valid indefinitely as long as VCC is maintained within specification and CS is held active. This eliminates timing overhead in microcontroller- or FPGA-based memory interfaces.
What are the two standby current modes supported by 71124S15YGI, and how are they activated?
The 71124S15YGI supports two distinct standby modes: TTL-level standby (ISB = 40 mA max) activated when CS > VIH, and CMOS-level full standby (ISB1 = 10 µA max) activated when CS > VHC (VCC – 0.2 V). This dual-mode capability is documented in Table 07 of the Renesas datasheet and enables flexible power management - rapid wake-up from ISB or ultra-low-power hold from ISB1 - depending on system-level control voltage levels.
Is 71124S15YGI pin-compatible with earlier IDT-branded versions of the same speed grade?
Yes, the 71124S15YGI is mechanically and electrically pin-compatible with IDT-branded 71124S15YGI devices, retaining identical PBG32 SOJ footprint, pin functions, DC specifications, and AC timing. Renesas' 2020 rebranding preserved full backward compatibility, as confirmed in the Ordering Information table and package diagrams - making the 71124S15YGI a seamless drop-in replacement for legacy IDT-sourced units in field upgrades.
What is the significance of the "center power/GND" pinout in 71124S15YGI, and how does it improve system performance?
The center power/GND pinout in the 71124S15YGI places VCC (pins 16,17) and GND (pins 13,20) near the package center rather than at opposite edges. As stated in the datasheet Features and Description sections, this layout reduces simultaneous switching noise (SSN) by shortening current loop inductance and improving decoupling efficiency - directly enhancing signal integrity in high-density backplanes and noise-sensitive analog-digital hybrid systems where the 71124S15YGI is commonly deployed.
71124S15YGI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
71124S15YGI FAQ
1.How can I place an order for 71124S15YGI through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S15YGI 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 71124S15YGI reliable?
The price and inventory of 71124S15YGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S15YGI is usually 5 days.
3.What payment methods are accepted for 71124S15YGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S15YGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S15YGI?
71124S15YGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S15YGI 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 71124S15YGI?
For technical support, including 71124S15YGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S15YGI requirements.
6.How does Aetrix verify that 71124S15YGI is sourced from the original manufacturer or authorized distributors?
All 71124S15YGI 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 71124S15YGI meets industry standards.
7.What is the process for return or replacement of 71124S15YGI?
All 71124S15YGI units undergo pre-shipment inspection (PSI). If there is an issue with 71124S15YGI, 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 71124S15YGI part is unused and in its original packaging.
Return procedure for 71124S15YGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S15YGI 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
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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