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Renesas IDT71124S12YGI8
- Part No.:
- IDT71124S12YGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71124S12YGI8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,618
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Product details
Overview
IDT71124S12YGI8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, JEDEC center-power/GND pinout for noise reduction, TTL-compatible I/O, and single 5 V supply operation. It serves as main or cache memory in embedded controllers, industrial PLCs, and legacy communication line cards requiring deterministic, no-refresh asynchronous operation.
For engineers reviewing the IDT71124S12YGI8 datasheet, IDT71124S12YGI8 pinout, IDT71124S12YGI8 application, or IDT71124S12YGI8 equivalent, key selection criteria include guaranteed 12 ns commercial-grade access timing, SOJ-32 package compatibility, low 160 mA dynamic ICC at fMAX, and dual enable control (CS + OE) for precise bus arbitration in multi-chip memory systems.
Technical Context
The IDT71124S12YGI8 implements fully static asynchronous architecture-no clocks or refresh cycles required-and uses high-reliability CMOS fabrication to achieve stable operation across 0°C to +70°C (Commercial grade). Its bidirectional I/O pins are directly TTL-compatible with VIH ≥ 2.2 V and VIL ≤ 0.8 V under 5.0 V ±10% supply.
It features JEDEC-revolutionary center-power/GND pinout (VCC on pins 5 & 24, GND on pins 13 & 20), reducing simultaneous switching noise. Control logic supports independent chip select (CS) and output enable (OE), enabling fast read cycles (tAA = 12 ns, tOE = 6 ns) and write cycles (tWC = 12 ns, tWP = 8 ns) with full TTL-level timing margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide parallel interface |
| Access Time (tAA) | 12 ns max - guarantees data valid within 12 ns of address stabilization, critical for CPU wait-state elimination |
| Supply Voltage | 4.5 V to 5.5 V - compatible with legacy 5 V TTL/CMOS system rails without level translation |
| 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) |
| Power Consumption | 160 mA dynamic ICC at fMAX; 40 mA ISB (TTL standby); 10 mA ISB1 (CMOS full standby) |
| Operating Temperature | 0°C to +70°C - Commercial grade only; no industrial variant for 12 ns speed grade |
| Package | 32-pin 400-mil Plastic SOJ (PBG32), JEDEC-standard footprint with center VCC/GND |
Pinout & Package
Package: 32-pin Plastic SOJ (PBG32), 400 mil width, JEDEC-standard center-power/GND configuration (VCC on pins 5 and 24; GND on pins 13 and 20).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0 LSB to A16 MSB) selects one of 131,072 bytes; fully static, no setup/hold dependency on clock |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; direction controlled by CS/OE/WE states per truth table |
| CS | Chip Select | Active-low enable: device responds only when CS = L; enables tACS = 12 ns access from CS assertion |
| OE | Output Enable | Active-low control for output drivers; tOE = 6 ns ensures rapid data release during read bursts |
| WE | Write Enable | Active-low write strobe; controls data latching on rising edge of WE during CS = L |
| VCC (pins 5, 24) | Power Supply | +5 V supply pins placed centrally to minimize IR drop and ground bounce across wide SOJ body |
| GND (pins 13, 20) | Ground Reference | Dual ground pins symmetrically positioned opposite VCC pins to reduce loop inductance and EMI |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/GND Pinout | Reduces simultaneous switching noise by 30–40% vs. corner-supply layouts, improving signal integrity in dense PCBs |
| Independent CS and OE Controls | Enables partial-memory reads without toggling CS, minimizing power spikes and bus contention in multi-SRAM systems |
| 12 ns Guaranteed Access (Commercial) | Eliminates CPU wait states in 20 MHz Z80, 68000, or early ARM7-based designs with 5 V buses |
| Full TTL Compatibility | Direct interfacing with legacy microprocessors and peripherals without level-shifting circuitry or external buffers |
| Low Standby Current (ISB1 = 10 mA) | Supports power-sensitive applications like battery-backed real-time clocks or sleep-mode memory retention |
Applications
| Industrial PLC Memory Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Storing real-time I/O mapping tables and firmware scratchpad in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state access to CPU during scan-cycle execution. Use Value: 12 ns tAA ensures deterministic response within 500 ns scan windows; center-pinout reduces noise-induced glitches in electrically noisy factory environments. | Use Scenario: Caching protocol headers and packet buffers in T1/E1 framing ICs and channel banks. IC Role / Device Role / Timing Role: High-reliability static RAM serving as dual-port-accessible buffer between serial framer and host processor bus. Use Value: TTL-compatible I/O and 160 mA ICC support sustained 10 MB/s burst transfers without thermal throttling or voltage droop. |
| Embedded Controller Boot ROM Shadow | Test Equipment Pattern Memory |
Use Scenario: Mirroring boot code from slower flash into fast RAM during initialization on x86 or PowerPC-based test platforms. IC Role / Device Role / Timing Role: Non-volatile shadow RAM holding executable instructions with sub-20 ns cycle time for instruction fetch pipelining. Use Value: 12 ns tRC enables full-speed instruction execution from RAM, cutting boot latency by >35% vs. direct flash execution. | Use Scenario: Storing digital stimulus/response vectors in automated boundary-scan and functional test systems. IC Role / Device Role / Timing Role: Deterministic-access memory bank synchronized to pattern generator clock edges via CS/OE timing control. Use Value: tOH = 4 ns hold time and tCHZ = 6 ns disable guarantee clean vector transitions at 83 MHz pattern rates. |
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-12ZSXIT | 128K × 8, 12 ns, 3.3 V core (with 5 V tolerant I/O), TSOP-32 package | Requires level translation for pure 5 V systems; lower ICC (90 mA) but incompatible VCC range | Select only if migrating to mixed-voltage designs or replacing aging 5 V-only boards with modern low-power constraints |
| AS6C1008-12ZIN | 128K × 8, 12 ns, 5 V, SOJ-32, but no center-power/GND pinout; higher ISB (50 mA) | Lacks noise-reduction pinout; less suitable for EMI-sensitive industrial control backplanes | Acceptable for cost-sensitive replacements where board layout cannot be modified and noise margin is adequate |
Compared with CY62128EV30LL-12ZSXIT and AS6C1008-12ZIN, the IDT71124S12YGI8 uniquely delivers 5 V-native operation with JEDEC center-power/GND layout-critical for maintaining signal integrity in legacy 5 V systems where voltage translation or layout revision is prohibited.
Availability
IDT71124S12YGI8 is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, embedded controller boot memory, and test equipment pattern storage requiring stable component supply and long-term obsolescence management.
Supply support for IDT71124S12YGI8 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 infrastructure markets.
IDT71124S12YGI8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for deterministic, no-refresh memory expansion in 5 V microprocessor and microcontroller systems deployed in industrial automation and communications infrastructure.
FAQ
What is the operating temperature range for IDT71124S12YGI8?
IDT71124S12YGI8 is rated for Commercial temperature range only: 0°C to +70°C. The 12 ns speed grade has no industrial variant-the datasheet explicitly states "No industrial temp on 12ns speed" in the Ordering Information section. This is confirmed in Revision 02/27/20 of the Renesas datasheet, which removed industrial 12 ns offerings from all tables and footnotes.
Does IDT71124S12YGI8 require a clock or refresh signal?
No, IDT71124S12YGI8 uses fully static asynchronous circuitry-no clocks, timers, or periodic refresh cycles are needed. Data retention is indefinite as long as VCC is maintained within 4.5 V to 5.5 V and ambient temperature remains within 0°C to +70°C. This eliminates timing-critical refresh overhead in microcontroller-based systems.
What is the meaning of "YGI8" in IDT71124S12YGI8?
In IDT71124S12YGI8, "Y" denotes Green (lead-free) packaging, "G" indicates 400-mil SOJ (PBG32), "I" specifies Industrial temperature grade-but this conflicts with the 12 ns speed grade restriction. Per Renesas' Orderable Part Information table, IDT71124S12YGI8 does not exist; only IDT71124S12YG and IDT71124S12YG8 are listed for Commercial grade. The "I" here is likely an internal mislabeling; the device functions strictly as Commercial (0°C to +70°C).
Can IDT71124S12YGI8 be used with a 3.3 V microprocessor bus?
IDT71124S12YGI8 is a 5 V-only device: its DC operating conditions specify VCC = 4.5 V to 5.5 V, and inputs require VIH ≥ 2.2 V (not 3.3 V–compatible logic thresholds). Direct connection to a 3.3 V bus risks violating VIH min and may cause unreliable reads. Level-shifting circuitry or a 3.3 V–tolerant alternative like CY62128EV30LL-12ZSXIT is required for 3.3 V systems.
What is the significance of the center-power/GND pinout in IDT71124S12YGI8?
IDT71124S12YGI8's JEDEC center-power/GND pinout places VCC on pins 5 and 24 and GND on pins 13 and 20-symmetrically distributed across the SOJ body. This layout minimizes ground bounce and supply rail collapse during high-speed I/O transitions, reducing simultaneous switching noise by up to 40% compared to corner-supply packages, which is essential for stable operation in electrically noisy industrial environments.
IDT71124S12YGI8 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:
- 12ns
- Access Time:
- 12 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
IDT71124S12YGI8 FAQ
1.How can I place an order for IDT71124S12YGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71124S12YGI8 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 IDT71124S12YGI8 reliable?
The price and inventory of IDT71124S12YGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71124S12YGI8 is usually 5 days.
3.What payment methods are accepted for IDT71124S12YGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71124S12YGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71124S12YGI8?
IDT71124S12YGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71124S12YGI8 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 IDT71124S12YGI8?
For technical support, including IDT71124S12YGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71124S12YGI8 requirements.
6.How does Aetrix verify that IDT71124S12YGI8 is sourced from the original manufacturer or authorized distributors?
All IDT71124S12YGI8 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 IDT71124S12YGI8 meets industry standards.
7.What is the process for return or replacement of IDT71124S12YGI8?
All IDT71124S12YGI8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71124S12YGI8, 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 IDT71124S12YGI8 part is unused and in its original packaging.
Return procedure for IDT71124S12YGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71124S12YGI8 Tags
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M24C02-WMN6TP
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