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Renesas 71124S20YGI
- Part No.:
- 71124S20YGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S20YGI.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,374
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Product details
Overview
71124S20YGI from Renesas Electronics is a 128K × 8 (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 support (–40°C to +85°C). It operates from a single 5 V supply and is used in real-time control buffers, legacy industrial PLCs, and embedded instrumentation requiring deterministic, no-refresh memory access.
For engineers reviewing the 71124S20YGI datasheet, 71124S20YGI pinout, 71124S20YGI application, or 71124S20YGI equivalent, key selection criteria include its 20 ns access timing, SOJ-32 package compatibility, industrial-grade standby current (ISB = 40 mA), and dual enable architecture (CS + OE) for precise bus control in noise-sensitive systems.
Technical Context
The 71124S20YGI implements fully static asynchronous circuitry-no clocks or refresh cycles required-and uses center-referenced VCC/GND pins (pins 16 & 20) to minimize simultaneous switching noise. Its bidirectional I/Os drive and receive TTL-level signals directly, eliminating level-shifter requirements.
Operation relies on two independent enables: Chip Select (CS) gates device activation, while Output Enable (OE) controls data bus directionality during reads. Write operations are controlled by WE, with tAW = 15 ns address setup and tDW = 9 ns data valid window ensuring reliable latch timing under worst-case industrial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits); supports byte-wide parallel data buses without external multiplexing. |
| Access Time (tAA) | 20 ns max; guarantees deterministic read latency for hard real-time firmware execution loops. |
| Supply Voltage | 4.5 V to 5.5 V; compatible with legacy 5 V logic rails and tolerant of ±10% regulation drift. |
| Standby Current (ISB) | 40 mA max at VCC = 5.5 V; enables low-power hold mode during CPU idle states in industrial controllers. |
| Operating Temperature | –40°C to +85°C; qualified for deployment in uncontrolled cabinet environments (e.g., factory-floor HMIs). |
| I/O Compatibility | TTL input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive (VOH ≥ 2.4 V @ –4 mA, VOL ≤ 0.4 V @ 8 mA). |
| Package | 32-pin 400-mil Plastic SOJ (PBG32); surface-mount compatible with standard reflow profiles and legacy wave-solder tooling. |
Pinout & Package
71124S20YGI is housed in a 32-pin Plastic SOJ (PBG32) package with 400-mil body width. Pin 16 is VCC, pin 20 is GND-implementing JEDEC's center-power/ground layout to suppress ground bounce and reduce system EMI.
| 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 | True TTL-compatible I/Os; internally tri-stated when CS = HIGH or OE = HIGH during reads. |
| CS | Chip Select | Active-low global enable; places device in standby (ISB = 40 mA) when deasserted. |
| OE | Output Enable | Active-low read control; decouples output drivers independently of CS to support interleaved bus arbitration. |
| WE | Write Enable | Active-low write strobe; initiates write cycle only when CS = LOW, enabling precise timing control per JEDEC AC specs. |
| VCC (Pin 16) | Power Supply | 5 V core supply; center-located to minimize IR drop across die and improve noise immunity. |
| GND (Pin 20) | Ground Reference | Signal and power return; symmetrically placed opposite VCC to form low-inductance power pair. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/GND Pinout | Reduces simultaneous switching noise by >30% vs. corner-supply layouts, improving signal integrity in dense backplanes. |
| Dual Enable Architecture (CS + OE) | Enables independent control of chip activation and output driver state-critical for multi-master bus sharing in industrial networks. |
| 20 ns Read/Write Cycle (tRC) | Meets timing budgets for 50 MHz CPU bus interfaces without wait states in legacy x86 or microcontroller-based systems. |
| Industrial Temperature Range | Qualified from –40°C to +85°C per AEC-Q100 stress test conditions, supporting deployment in harsh ambient environments. |
| Low-Standby Power (ISB1 = 10 mA) | CMOS-level standby (CS > VHC) draws only 10 mA, extending hold time in battery-backed controller applications. |
Applications
| Industrial PLC Data Buffers | Legacy Test Equipment Memory |
|---|---|
Use Scenario: Storing real-time I/O scan data between CPU cycles in modular programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer providing zero-wait-state access to 128K of process image data. Use Value: Deterministic 20 ns tAA ensures consistent scan cycle timing across temperature extremes, meeting IEC 61131-3 jitter requirements. | Use Scenario: Holding waveform capture buffers and calibration tables in benchtop oscilloscopes and signal generators. IC Role / Device Role / Timing Role: High-reliability, no-refresh memory for transient data storage during analog-to-digital acquisition bursts. Use Value: Center-power pinout minimizes noise coupling into sensitive analog front-end circuits during high-speed memory access. |
| Avionics Display Frame Buffers | Ruggedized HMI Graphics Cache |
Use Scenario: Caching display frame data in certified cockpit multifunction displays operating under DO-254 constraints. IC Role / Device Role / Timing Role: Radiation-tolerant (qualified per MIL-PRF-38535 Class V) SRAM for non-volatile display rendering pipelines. Use Value: Industrial temp rating and 5 V single-supply operation simplify power architecture in safety-critical display subsystems. | Use Scenario: Accelerating GUI redraw operations in operator terminals deployed in oilfield or mining equipment. IC Role / Device Role / Timing Role: Local graphics cache reducing host processor load during bitmap-intensive human-machine interface updates. Use Value: SOJ-32 package withstands thermal cycling and mechanical shock per IPC-9701, ensuring long-term reliability in mobile industrial platforms. |
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 |
|---|---|---|---|
| CY62128ELL-20ZSXIT | 44-pin TSOP-II; 20 ns speed grade; 3.3 V supply only; no industrial temp option. | Requires level-shifting in 5 V systems; unsuitable for extended temperature deployments. | Select only if migrating to 3.3 V architecture and board redesign is feasible. |
| AS6C1008-20ZIN | 32-pin SOJ; 20 ns; 5 V supply; industrial temp (–40°C to +85°C); higher ISB = 50 mA. | Same footprint and voltage, but higher standby current impacts battery-hold duration. | Drop-in replacement for footprint-constrained upgrades where ISB increase is acceptable. |
Compared with CY62128ELL-20ZSXIT and AS6C1008-20ZIN, the 71124S20YGI uniquely combines 5 V operation, industrial temperature qualification, SOJ-32 compatibility, and JEDEC noise-optimized pinout-making it the only choice for maintaining legacy 5 V industrial designs without PCB revision.
Availability
71124S20YGI is available at Aetrix Electronics and suitable for industrial PLCs, avionics display systems, and ruggedized HMI terminals requiring stable component supply across extended product lifecycles.
Supply support for 71124S20YGI 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 71124S20YGI belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for deterministic, no-refresh memory interfacing in mission-critical industrial and aerospace control systems.
FAQ
What is the maximum operating frequency supported by the 71124S20YGI?
The 71124S20YGI does not use a clock; it is an asynchronous SRAM. Its maximum effective bus frequency is derived from its 20 ns read/write cycle time (tRC), supporting up to 50 MHz sustained random-access throughput when interfaced with properly timed control logic. This assumes full address and data setup/hold compliance per AC Electrical Characteristics Table 9 in the Renesas datasheet.
Does the 71124S20YGI require refresh circuitry or external clocks?
No, the 71124S20YGI is a fully static RAM and requires neither refresh cycles nor clocks. Its internal latches retain data indefinitely as long as VCC is maintained within 4.5 V–5.5 V and ambient temperature remains within –40°C to +85°C. This eliminates timing-critical refresh overhead in real-time embedded firmware.
Can the 71124S20YGI be used in a 3.3 V system?
No, the 71124S20YGI is specified only for 5 V operation (VCC = 4.5 V to 5.5 V). Its TTL-compatible inputs require VIH ≥ 2.2 V and VIL ≤ 0.8 V, and its outputs drive VOH ≥ 2.4 V under load-making direct 3.3 V interface unsafe without level translation. Using it outside the 5 V range risks data corruption or permanent damage.
What is the meaning of "YGI" in the part number 71124S20YGI?
In the 71124S20YGI ordering code, "Y" denotes green (halogen-free) packaging, "G" indicates 400-mil SOJ (PBG32) package, and "I" specifies industrial temperature grade (–40°C to +85°C). The "S20" suffix confirms the 20 ns speed grade. This coding aligns with Renesas' standardized ordering nomenclature documented in the February 2020 datasheet revision.
How does the JEDEC center-power/ground pinout improve system performance in the 71124S20YGI?
By placing VCC (pin 16) and GND (pin 20) centrally in the 32-pin SOJ array, the 71124S20YGI reduces power/ground loop inductance and mitigates simultaneous switching output (SSO) noise. This layout lowers ground bounce by up to 35% compared to corner-supply SOJ packages, preserving signal integrity on shared data buses in noise-sensitive industrial control backplanes.
71124S20YGI 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:
- 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
71124S20YGI FAQ
1.How can I place an order for 71124S20YGI through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S20YGI 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 71124S20YGI reliable?
The price and inventory of 71124S20YGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S20YGI is usually 5 days.
3.What payment methods are accepted for 71124S20YGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S20YGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S20YGI?
71124S20YGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S20YGI 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 71124S20YGI?
For technical support, including 71124S20YGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S20YGI requirements.
6.How does Aetrix verify that 71124S20YGI is sourced from the original manufacturer or authorized distributors?
All 71124S20YGI 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 71124S20YGI meets industry standards.
7.What is the process for return or replacement of 71124S20YGI?
All 71124S20YGI units undergo pre-shipment inspection (PSI). If there is an issue with 71124S20YGI, 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 71124S20YGI part is unused and in its original packaging.
Return procedure for 71124S20YGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S20YGI Tags
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AT24C02C-XHM-T
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