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Renesas IDT71124S15Y8
- Part No.:
- IDT71124S15Y8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71124S15Y8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,338
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Product details
Overview
IDT71124S15Y8 from Renesas Electronics is a 128K × 8 (1 Mbit) high-speed CMOS static RAM with 15 ns access time, JEDEC center-power/ground pinout for noise reduction, TTL-compatible bidirectional I/O, and single 5 V supply operation. It serves as main or cache memory in embedded controllers, industrial PLCs, and legacy communication interface cards requiring deterministic asynchronous read/write timing.
For engineers reviewing the IDT71124S15Y8 datasheet, IDT71124S15Y8 pinout, IDT71124S15Y8 application, or IDT71124S15Y8 equivalent, key selection criteria include guaranteed 15 ns commercial-grade access/cycle times, SOJ-32 package compatibility, low standby current (ISB = 40 mA), and support for asynchronous WE- or CS-controlled write cycles without refresh or clocking.
Technical Context
The IDT71124S15Y8 implements fully static asynchronous circuitry-no clocks, no refresh required-and uses high-reliability CMOS fabrication to achieve 128K × 8 organization with address decoding internal to the chip. Its dual control architecture supports both CS-driven and WE-driven write timing, with separate OE enabling fast output enable (tOE ≤ 7 ns).
JEDEC-compliant center-power/ground pinout (VCC and GND on pins 5 & 20) minimizes simultaneous switching noise, while bidirectional TTL-compatible I/Os (VIH ≥ 2.2 V, VIL ≤ 0.8 V) ensure direct interfacing with legacy microcontrollers and FPGAs operating at 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits); supports byte-wide data bus without external multiplexing. |
| Access Time (tAA) | 15 ns max (commercial grade, 0°C to +70°C); defines minimum address-to-valid-data delay under worst-case VCC and temperature. |
| Read Cycle Time (tRC) | 15 ns max; determines maximum sustained read throughput (66.7 MHz random access rate). |
| Supply Voltage | 4.5 V to 5.5 V; compatible with standard 5 V TTL logic rails and tolerant of ±10% regulation variation. |
| Standby Current (ISB) | 40 mA max (TTL-level deselect); enables low-power hold mode when CS > VIH and outputs are tri-stated. |
| I/O Capacitance | CI/O = 8 pF max; limits signal integrity degradation and reduces driver loading on shared data buses. |
| Output Enable Delay (tOE) | 7 ns max; ensures rapid data availability after OE assertion, critical for burst-mode or pipelined reads. |
Pinout & Package
Package: 32-pin 400-mil Plastic SOJ (PBG32), surface-mount, gull-wing leads, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; no internal latching-address must be stable before CS or OE assertion. |
| I/O0–I/O7 | Bidirectional Data Bus | TTL-compatible 8-bit data path; direction controlled by WE and CS; high-impedance when deselected or during write setup. |
| CS | Chip Select | Active-low enable; device enters standby (ISB = 40 mA) when high; controls tACS and tPD timing parameters. |
| OE | Output Enable | Active-low; enables output drivers independently of CS; allows read operations while CS remains asserted across multiple devices. |
| WE | Write Enable | Active-low; initiates write cycle when CS is low; determines tWP, tDW, and tWHZ timing relationships. |
| VCC | Power Supply | +5 V supply (pins 5 and 24); center-power placement reduces ground bounce and improves noise immunity. |
| GND | Ground | Reference return (pins 12 and 20); center-ground placement complements VCC for symmetric decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/Ground Pinout | Reduces simultaneous switching noise by 30–40% vs. conventional edge-power layouts, improving signal integrity in dense PCBs. |
| Asynchronous Static Operation | Eliminates need for clocks, refresh controllers, or timing-critical system synchronization-simplifies design in microcontroller-based systems. |
| Dual Write Control (CS- or WE-Driven) | Supports flexible timing integration: CS-controlled writes for simple systems; WE-controlled writes for high-performance burst transfers with precise data hold control. |
| TTL-Compatible I/O Levels | Direct interface with legacy 5 V microprocessors (e.g., 80Cxx, Z80, 68K) and FPGA I/O banks without level-shifting circuitry. |
| Low Standby Power (ISB1 = 10 mA) | CMOS-level deselect (CS > VHC) reduces current to 10 mA-enables energy-efficient power-gating in battery-backed or always-on modules. |
Applications
| Industrial PLC Memory Buffer | Legacy Communication Interface Card |
|---|---|
Use Scenario: Storing real-time I/O mapping tables and firmware scratchpad in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Asynchronous SRAM providing deterministic 15 ns read/write latency for cyclic scan execution without CPU wait states. Use Value: Guaranteed 15 ns performance across –40°C to +85°C (via industrial-grade variants like IDT71124S15YGI8) ensures consistent scan cycle timing under thermal stress. | Use Scenario: Acting as transmit/receive FIFO and protocol translation buffer in RS-485/Modbus gateway cards interfacing with older SCADA systems. IC Role / Device Role / Timing Role: Byte-wide static RAM serving as dual-port accessible buffer between UART controller and host processor, managed via discrete CS/OE/WE strobes. Use Value: TTL-compatible I/O and 5 V operation eliminate level shifters; center-pinout reduces EMI-induced CRC errors in electrically noisy plant-floor wiring. |
| Embedded Controller Boot ROM Shadow | Test Equipment Pattern Memory |
Use Scenario: Shadowing slower parallel NOR flash during boot sequence in ARM7/9-based industrial controllers to accelerate initialization. IC Role / Device Role / Timing Role: High-speed SRAM mirroring boot code region; enabled via early-decode address window and CS gating. Use Value: 15 ns tAA eliminates boot-time wait states, reducing cold-start latency by up to 35% compared to 20 ns alternatives. | Use Scenario: Storing digital stimulus/response patterns in automated test equipment (ATE) for semiconductor wafer probing. IC Role / Device Role / Timing Role: Deterministic-access memory bank synchronized to pattern generator clock edges via CS/OE timing control. Use Value: Matched tRC and tAA (both 15 ns) enable tight 15 ns pattern update intervals-critical for high-speed functional test coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZSXIT | 512K × 8, 45 ns access, 3.3 V core (with 5 V tolerant I/O), TSOP-32 package. | Higher density but slower speed; requires voltage translation if system lacks 3.3 V rail. | Select when board space permits larger density and system operates at 3.3 V logic levels. |
| AS6C1008-15ZIN | 128K × 8, 15 ns access, 5 V operation, SOJ-32 package, but no center-power pinout. | Same speed and organization, but higher noise susceptibility due to edge-mounted VCC/GND. | Select only if pinout compatibility is secondary to cost and JEDEC footprint is not required. |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-15ZIN, the IDT71124S15Y8 uniquely delivers 15 ns performance in a noise-optimized JEDEC center-power SOJ-32 package at 5 V-making it the preferred choice for legacy 5 V systems where signal integrity and timing determinism are critical.
Availability
IDT71124S15Y8 is available at Aetrix Electronics and suitable for industrial PLCs, legacy communication interface cards, and embedded controller boot acceleration requiring stable component supply, long-lifecycle support, and verified SOJ-32 footprint compatibility.
Supply support for IDT71124S15Y8 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, including microcontrollers, analog, power, and memory products for industrial, automotive, and infrastructure markets.
The IDT71124S15Y8 belongs to Renesas' legacy high-speed CMOS SRAM product line, designed specifically for deterministic, low-latency memory expansion in 5 V microprocessor and FPGA-based systems where asynchronous operation and noise resilience are essential.
FAQ
What is the operating temperature range for the IDT71124S15Y8?
The IDT71124S15Y8 is rated for commercial temperature operation from 0°C to +70°C. While the base IDT71124 family includes industrial-grade variants (e.g., IDT71124S15YGI8), the specific part IDT71124S15Y8 carries the 'Y' suffix indicating commercial grade. Its datasheet specifies VCC = 5.0 V ±10% and operation within this ambient range.
Does the IDT71124S15Y8 require a clock or refresh signal?
No, the IDT71124S15Y8 uses fully static CMOS circuitry and requires neither a clock nor periodic refresh. All operations-read, write, and standby-are controlled asynchronously via CS, OE, and WE signals. This eliminates timing-critical clock distribution and simplifies integration into microcontroller or FPGA systems lacking dedicated memory controllers.
What is the significance of the "center power/ground" pinout in the IDT71124S15Y8?
The IDT71124S15Y8 implements JEDEC's center-power/ground pinout (VCC on pin 5 and pin 24, GND on pin 12 and pin 20), which symmetrically distributes supply and return paths across the package. This layout reduces ground bounce and simultaneous switching noise by up to 40%, improving signal integrity in high-density PCBs-especially critical for reliable operation in industrial noise environments.
Can the IDT71124S15Y8 interface directly with 3.3 V logic systems?
No-the IDT71124S15Y8 is a 5 V-only device with TTL-compatible inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and 5 V output swing. Driving its inputs from 3.3 V logic may violate VIH minimum under worst-case VCC tolerance; likewise, its 5 V outputs exceed 3.3 V I/O absolute maximum ratings. Level-shifting circuitry is required for safe interfacing with 3.3 V systems.
How does the IDT71124S15Y8 handle write operations when both CS and WE are active?
When CS is LOW and WE transitions LOW, the IDT71124S15Y8 executes a write cycle per its truth table. Data on I/O0–I/O7 is latched on the WE falling edge. The part supports two timing modes: CS-controlled (tCW = 12 ns min) and WE-controlled (tWP = 12 ns min). OE must remain HIGH during writes to prevent bus contention, and tDW (data valid to end-of-write) must be met for reliable storage.
IDT71124S15Y8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
IDT71124S15Y8 FAQ
1.How can I place an order for IDT71124S15Y8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71124S15Y8 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 IDT71124S15Y8 reliable?
The price and inventory of IDT71124S15Y8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71124S15Y8 is usually 5 days.
3.What payment methods are accepted for IDT71124S15Y8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71124S15Y8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71124S15Y8?
IDT71124S15Y8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71124S15Y8 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 IDT71124S15Y8?
For technical support, including IDT71124S15Y8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71124S15Y8 requirements.
6.How does Aetrix verify that IDT71124S15Y8 is sourced from the original manufacturer or authorized distributors?
All IDT71124S15Y8 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 IDT71124S15Y8 meets industry standards.
7.What is the process for return or replacement of IDT71124S15Y8?
All IDT71124S15Y8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71124S15Y8, 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 IDT71124S15Y8 part is unused and in its original packaging.
Return procedure for IDT71124S15Y8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71124S15Y8 Tags
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