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Renesas 71124S20YGI8
- Part No.:
- 71124S20YGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S20YGI8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
71124S20YGI8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with JEDEC center-power/ground pinout, 20 ns read/write cycle time, TTL-compatible I/O, and industrial temperature operation (–40°C to +85°C) in a 32-pin 400-mil Plastic SOJ package - used in real-time control buffers and legacy industrial PLC memory expansion.
For engineers reviewing the 71124S20YGI8 datasheet, 71124S20YGI8 pinout, 71124S20YGI8 application, or 71124S20YGI8 equivalent, key selection criteria include verified 20 ns access timing, industrial-grade standby current (ISB = 40 mA), SOJ-32 mechanical compatibility, and direct replacement feasibility for legacy IDT71124-based systems requiring no PCB redesign.
Technical Context
The 71124S20YGI8 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 6 ns OE-to-output valid timing and bidirectional TTL-compatible I/O lines driven from a single 5.0 V ±10% supply.
It uses center-power/ground pinout (VCC at pins 5 & 24, GND at pins 13 & 20) to minimize switching noise and improve signal integrity in dense memory subsystems. Standby modes include TTL-level ISB (40 mA) and CMOS-level ISB1 (10 mA), selectable via CS voltage threshold (VIH/VHC).
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 multiplexing |
| Access Time (tAA) | 20 ns max - defines minimum address hold before valid data appears on I/O pins during read |
| Read Cycle Time (tRC) | 20 ns max - sets minimum interval between successive read operations |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL logic rails and legacy power domains |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drives, and factory automation environments |
| Standby Current (ISB1) | 10 mA max at CMOS-level CS - enables ultra-low-power retention when CS > VHC (≈4.8 V) |
| I/O Capacitance | 8 pF max - ensures minimal loading on shared data buses and predictable timing margins |
Pinout & Package
Package: 32-pin 400-mil Plastic SOJ (PBG32), JEDEC-standard center-power/ground layout - pin 1 index corner marked, body width 400 mil (10.16 mm), lead pitch 0.050 inch (1.27 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; A16 enables 256K-byte addressing space |
| I/O0–I/O7 | Bidirectional Data Lines | TTL-compatible inputs/outputs sharing same pins; require external bus transceivers only for multi-master arbitration |
| CS | Chip Select | Active-low enable; asserts internal circuitry and determines ISB vs. ISB1 standby mode based on voltage level |
| OE | Output Enable | Active-low control of output drivers; allows read data to appear within 8 ns (tOE) while CS remains asserted |
| WE | Write Enable | Active-low write strobe; initiates write cycle when low concurrently with CS low; controls data latching timing |
| VCC (pins 5, 24) | Power Supply | Dual-center VCC placement reduces simultaneous switching noise and improves PSRR across memory array |
| GND (pins 13, 20) | Ground Reference | Dual-center ground complements VCC layout to minimize ground bounce and enhance signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC center-power/ground pinout | Reduces system-level noise coupling by 30–40% compared to corner-powered SOJ layouts, improving timing margin in mixed-signal PLC backplanes |
| Separate CS and OE controls | Enables partial-memory reads without full chip activation, reducing dynamic power by up to 22% in burst-access scenarios |
| CMOS-level standby (ISB1) | 10 mA max current draw at VCC = 5.5 V when CS held above VHC - extends battery-backed operation in maintenance mode |
| TTL-compatible I/O | Direct interface with 74LS/74ALS logic families without level-shifting; VOH ≥ 2.4 V @ –4 mA, VOL ≤ 0.4 V @ 8 mA |
| Fully static operation | No clock, refresh, or wait-state logic required - simplifies FPGA/CPLD memory controller design and eliminates refresh overhead |
Applications
| Industrial PLC Data Buffer | Legacy CNC Motion Controller Memory |
|---|---|
Use Scenario: Stores real-time I/O scan data and motion trajectory points in programmable logic controllers with deterministic 20 ns memory access. IC Role / Device Role / Timing Role: Byte-wide static RAM serving as dual-port accessible scratchpad memory for ladder logic execution cycles. Use Value: 20 ns tAA ensures sub-1 µs memory latency per scan cycle, meeting IEC 61131-3 cycle time requirements for safety-rated controllers. | Use Scenario: Holds interpolated position tables and servo loop coefficients in retrofit CNC controllers using 80C188 or Z80-based architectures. IC Role / Device Role / Timing Role: Non-refreshing memory mapped into 8-bit data space, accessed via dedicated address decode logic. Use Value: Industrial temperature rating (–40°C to +85°C) and 5 V tolerance ensure reliable operation in uncooled machine tool cabinets. |
| Avionics Maintenance Terminal RAM | Ruggedized HMI Display Frame Buffer |
Use Scenario: Provides non-volatile configuration storage and diagnostic log buffer in FAA-certified portable maintenance terminals operating in wide ambient ranges. IC Role / Device Role / Timing Role: Standby-enabled SRAM retaining critical fault logs during power cycling between aircraft ground checks. Use Value: ISB1 = 10 mA at CMOS-level CS allows >72-hour battery backup without recharge, satisfying DO-160 Section 22 thermal soak requirements. | Use Scenario: Serves as pixel line buffer in sunlight-readable HMIs for mining and construction equipment with extended thermal exposure. IC Role / Device Role / Timing Role: High-reliability byte-access memory supporting parallel 8-bit RGB interface to display controller ASICs. Use Value: Center-power/ground SOJ layout minimizes EMI-induced bit flips in high-noise engine bay environments. |
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 |
|---|---|---|---|
| CY62128EV30LL-45ZSXIT | 45 ns access, 3.3 V core (with 5 V tolerant I/O), 32-pin TSOP-II - slower but lower voltage and newer package | Requires level translation for pure 5 V systems; unsuitable where 20 ns timing is mandatory | Select only if migrating to 3.3 V infrastructure and relaxing timing constraints |
| AS6C1008-20ZIN | 20 ns access, 5 V operation, 32-pin SOJ - identical speed and voltage, but no center-power/ground pinout | Higher noise susceptibility in high-density layouts; may require additional decoupling or layout revision | Drop-in replacement for timing-critical use, but verify board-level noise margin with existing decoupling scheme |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-20ZIN, the 71124S20YGI8 uniquely delivers 20 ns performance in an industrial-grade, center-power/ground SOJ package - making it irreplaceable in legacy 5 V systems where noise immunity and exact timing compliance are non-negotiable.
Availability
71124S20YGI8 is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy CNC controller memory upgrades, and ruggedized HMI frame buffer applications requiring stable component supply across extended product lifecycles.
Supply support for 71124S20YGI8 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 71124 family was originally developed by IDT and acquired by Renesas to support long-lifecycle industrial memory needs - specifically targeting backward-compatible replacements for aging 5 V SRAM designs in factory automation and avionics.
FAQ
What is the maximum operating temperature range for the 71124S20YGI8?
The 71124S20YGI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters including tAA = 20 ns, ISB = 40 mA, and ISB1 = 10 mA, making it suitable for deployment in uncontrolled-ambient industrial enclosures and transportation equipment.
Does the 71124S20YGI8 require a clock or refresh signal to retain data?
No, the 71124S20YGI8 is a fully static RAM and requires neither a clock nor periodic refresh. Data retention is maintained as long as VCC remains within 4.5 V to 5.5 V and ambient temperature stays within –40°C to +85°C. This eliminates timing-critical controller logic and simplifies integration with microcontrollers lacking dedicated memory refresh engines.
What does the 'YGI8' suffix indicate in the 71124S20YGI8 part number?
The 'YGI8' suffix denotes: Y = Green (lead-free), G = 400-mil SOJ package (PBG32), I = Industrial temperature grade (–40°C to +85°C), and 8 = Tape-and-reel packaging (1,000 units per reel). This distinguishes it from tube-packaged variants (e.g., 71124S20YGI) and commercial-grade versions (e.g., 71124S20YG8).
Can the 71124S20YGI8 be used as a direct replacement for older IDT71124S20YGI parts?
Yes, the 71124S20YGI8 is a Renesas-branded rebranding of the original IDT71124S20YGI with identical pinout, timing, DC specs, and SOJ-32 package. Renesas maintains full functional and mechanical equivalence, including center-power/ground layout and 20 ns AC characteristics - enabling drop-in replacement without layout or firmware changes.
What is the significance of the center-power/ground pinout in the 71124S20YGI8?
The center-power/ground pinout (VCC at pins 5 & 24, GND at pins 13 & 20) reduces simultaneous switching output (SSO) noise by distributing power/ground connections symmetrically across the package. This lowers ground bounce and improves signal integrity in high-speed memory buses - a key advantage over conventional corner-powered SOJ SRAMs in noise-sensitive industrial backplanes.
71124S20YGI8 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:
- 20ns
- Access Time:
- 20 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
71124S20YGI8 FAQ
1.How can I place an order for 71124S20YGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S20YGI8 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 71124S20YGI8 reliable?
The price and inventory of 71124S20YGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S20YGI8 is usually 5 days.
3.What payment methods are accepted for 71124S20YGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S20YGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S20YGI8?
71124S20YGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S20YGI8 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 71124S20YGI8?
For technical support, including 71124S20YGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S20YGI8 requirements.
6.How does Aetrix verify that 71124S20YGI8 is sourced from the original manufacturer or authorized distributors?
All 71124S20YGI8 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 71124S20YGI8 meets industry standards.
7.What is the process for return or replacement of 71124S20YGI8?
All 71124S20YGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71124S20YGI8, 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 71124S20YGI8 part is unused and in its original packaging.
Return procedure for 71124S20YGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S20YGI8 Tags
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