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Renesas 71124S15YGI8
- Part No.:
- 71124S15YGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S15YGI8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,662
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Product details
Overview
71124S15YGI8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with JEDEC center-power/GND pinout, 15 ns access time (industrial grade), TTL-compatible I/O, and single 5 V supply operation. It serves as main or cache memory in embedded controllers, industrial PLCs, and legacy telecom line cards requiring deterministic, no-refresh asynchronous operation.
For engineers reviewing the 71124S15YGI8 datasheet, 71124S15YGI8 pinout, 71124S15YGI8 application, or 71124S15YGI8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), SOJ-32 package compatibility, 15 ns read/write cycle timing, and low standby current (10 mA ISB1) in full CMOS standby mode.
Technical Context
The 71124S15YGI8 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 write cycles (tWC = 15 ns, tWP = 12 ns) under industrial conditions.
JEDEC-standardized center-power/GND pinout reduces simultaneous switching noise; bidirectional TTL-compatible I/Os (VIL = 0.8 V, VOH = 2.4 V @ –4 mA) interface directly with legacy microcontrollers and FPGAs without level-shifting. Standby modes include TTL-level (ISB = 40 mA) and full CMOS-level (ISB1 = 10 mA) power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide data bus for direct CPU/FPGA interfacing |
| Access Time (tAA) | 15 ns max at –40°C to +85°C - guarantees deterministic latency for real-time control loops |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V logic rails and tolerant of ±10% regulation |
| Standby Current (ISB1) | 10 mA max at VCC = 5.5 V, f = 0 - enables ultra-low-power hold state during system sleep |
| I/O Compatibility | TTL input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive (VOH ≥ 2.4 V @ –4 mA) - direct connection to 5 V microcontrollers |
| Package | 32-pin 400-mil Plastic SOJ (PBG32) - industry-standard footprint with proven thermal and mechanical reliability |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and outdoor base station equipment |
Pinout & Package
71124S15YGI8 is housed in a 32-pin 400-mil Plastic SOJ (PBG32) package with JEDEC-revolutionary center-power/GND layout that minimizes ground bounce and improves signal integrity in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; A16 enables 1-Mbit addressing |
| 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 (tPU) and power-down (tPD) timing |
| OE | Output Enable | Active-low control of output drivers; enables fast read access (tOE = 7 ns) independent of CS |
| WE | Write Enable | Active-low write strobe; defines write cycle boundaries (tWP = 12 ns min) with CS |
| VCC | Power Supply | +5 V supply pin located at center-left (pins 24, 28) per JEDEC noise-reduction layout |
| GND | Ground | Reference ground pin located adjacent to VCC (pins 25, 29) to minimize loop inductance |
Key Features
| Feature | Design Value |
|---|---|
| Center-power/GND pinout | Reduces simultaneous switching noise by >30% vs. conventional SOJ layouts, improving system-level EMI margin |
| Two-tier standby modes | ISB = 40 mA (TTL-level deselect) and ISB1 = 10 mA (CMOS-level full standby) enable flexible power management |
| Independent OE control | Enables fast read access (7 ns tOE) without toggling CS, supporting burst-mode or pipelined memory access |
| 15 ns industrial-grade timing | Guaranteed performance over –40°C to +85°C ensures reliability in uncontrolled industrial environments |
| Single 5 V supply | Eliminates need for dual-rail regulators or level shifters, reducing BOM count and board space |
Applications
| Industrial PLC Memory | Legacy Telecom Line Card |
|---|---|
Use Scenario: Storing program code and I/O mapping tables in programmable logic controllers deployed in factory-floor cabinets. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state execution for ladder logic interpreters and real-time task schedulers. Use Value: 15 ns access time ensures deterministic scan-cycle timing under worst-case thermal conditions; SOJ-32 package supports long-term reflow reliability. | Use Scenario: Buffering voice channel data and protocol headers in T1/E1 framing circuits of legacy telecom switches. IC Role / Device Role / Timing Role: Byte-wide memory buffer interfacing directly with Z80 or 80C188 microcontrollers via 8-bit data bus and discrete control lines. Use Value: TTL-compatible I/O eliminates external level translators; industrial temp rating supports operation in non-climate-controlled central offices. |
| Embedded Motor Drive Controller | Avionics Test Equipment |
Use Scenario: Holding motion profile parameters and encoder feedback history in servo drive modules operating near motors and inverters. IC Role / Device Role / Timing Role: Static RAM used for real-time parameter storage and interrupt-service routine scratchpad memory. Use Value: Center-power/GND pinout suppresses noise coupling from high-di/dt power stages; 10 mA ISB1 enables low-power idle states between motion segments. | Use Scenario: Storing calibration coefficients and self-test vectors in portable avionics ground-support test sets. IC Role / Device Role / Timing Role: Non-refresh memory for deterministic boot-time configuration loading and runtime lookup tables. Use Value: Guaranteed –40°C to +85°C operation meets DO-160 environmental test requirements; Pb-free SOJ package complies with aerospace RoHS exemptions. |
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, 15 ns, 32-pin TSOP-II, 3.3 V core (5 V tolerant I/O) | Requires level translation for pure 5 V systems; lower active current but higher standby leakage above 70°C | Preferred for new designs targeting lower power and smaller footprint; not drop-in for 71124S15YGI8 SOJ socket |
| AS6C1008-15ZIN | 128K × 8, 15 ns, 32-pin SOJ, 5 V only, ISB1 = 25 µA (vs. 10 mA) | Negligible standby current enables battery-backed retention; slower tCHZ (15 ns vs. 7 ns) limits high-speed bus sharing | Best for always-on, low-quiescent systems; pinout matches but timing margins differ in burst-read scenarios |
Compared with CY62128ELL-15ZSXIT and AS6C1008-15ZIN, the 71124S15YGI8 offers superior noise immunity via center-power/GND layout and guaranteed industrial-timing compliance in legacy 5 V systems, making it optimal for drop-in replacement in fielded equipment where layout change is prohibited.
Availability
71124S15YGI8 is available at Aetrix Electronics and suitable for industrial PLCs, legacy telecom infrastructure, and embedded motor drive controllers requiring stable component supply across extended product lifecycles.
Supply support for 71124S15YGI8 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 71124 family was designed as high-reliability, no-refresh static RAM for mission-critical industrial and telecom systems where deterministic timing and long-term supply stability are mandatory.
FAQ
What is the operating temperature range specified for the 71124S15YGI8?
The 71124S15YGI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all AC and DC parameters in the datasheet, including 15 ns access time, 10 mA ISB1 standby current, and TTL-compatible I/O thresholds. The "I" suffix in the part number explicitly denotes this industrial grade.
Does the 71124S15YGI8 require a clock or refresh circuit?
No, the 71124S15YGI8 uses fully static CMOS memory cells and asynchronous control logic. It operates without any clock signal or periodic refresh cycles - data retention is maintained as long as VCC is applied within specification. This eliminates timing complexity in microcontroller- or FPGA-based systems interfacing with the 71124S15YGI8.
What is the significance of the center-power/GND pinout in the 71124S15YGI8?
The center-power/GND pinout places VCC and GND pins adjacent at the center of the SOJ package (pins 24/25 and 28/29), minimizing ground loop inductance and reducing simultaneous switching output (SSO) noise. This layout improves signal integrity in high-density PCBs and is a JEDEC-standard feature confirmed for the 71124S15YGI8 in its Renesas datasheet.
Can the 71124S15YGI8 be used with a 3.3 V microcontroller?
The 71124S15YGI8 is a 5 V-only device with TTL-compatible inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and outputs (VOH ≥ 2.4 V). While its inputs accept 3.3 V logic highs, its outputs drive 5 V levels. Direct connection to a 3.3 V microcontroller requires level-shifting on the I/O bus to prevent damage or excessive current; it is not 3.3 V I/O compatible out-of-the-box.
What are the two standby current specifications for the 71124S15YGI8?
The 71124S15YGI8 specifies two standby currents: ISB = 40 mA (when CS > VIH, TTL-level deselect) and ISB1 = 10 mA (when CS > VHC and all inputs at valid CMOS levels, full CMOS standby). ISB1 enables deeper power savings in systems where control signals can be held at rail extremes during idle periods.
71124S15YGI8 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
71124S15YGI8 FAQ
1.How can I place an order for 71124S15YGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S15YGI8 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 71124S15YGI8 reliable?
The price and inventory of 71124S15YGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S15YGI8 is usually 5 days.
3.What payment methods are accepted for 71124S15YGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S15YGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S15YGI8?
71124S15YGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S15YGI8 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 71124S15YGI8?
For technical support, including 71124S15YGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S15YGI8 requirements.
6.How does Aetrix verify that 71124S15YGI8 is sourced from the original manufacturer or authorized distributors?
All 71124S15YGI8 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 71124S15YGI8 meets industry standards.
7.What is the process for return or replacement of 71124S15YGI8?
All 71124S15YGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71124S15YGI8, 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 71124S15YGI8 part is unused and in its original packaging.
Return procedure for 71124S15YGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S15YGI8 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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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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