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Renesas IDT71124S15Y
- Part No.:
- IDT71124S15Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71124S15Y.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
IDT71124S15Y from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 15 ns access time, JEDEC center-power/GND 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, no-refresh asynchronous operation.
For engineers reviewing the IDT71124S15Y datasheet, IDT71124S15Y pinout, IDT71124S15Y application, or IDT71124S15Y equivalent, key selection criteria include access/cycle time matching (15 ns), SOJ-32 package compatibility, industrial temperature support (–40°C to +85°C), and TTL-level input/output drive capability without level-shifting.
Technical Context
The IDT71124S15Y implements fully static asynchronous architecture-no clocks or refresh cycles required-and uses high-reliability CMOS fabrication optimized for low-noise operation. Its JEDEC-compliant 32-pin SOJ package places VCC and GND at opposing center pins (pins 16 and 17), minimizing simultaneous switching noise during address/data transitions.
It features independent Chip Select (CS) and Output Enable (OE) controls, enabling fast read access (tAA = 15 ns, tOE = 7 ns) and precise output gating. Write operations are controlled by WE, with write cycle time tWC = 15 ns and data hold time tDH = 0 ns, supporting reliable interfacing with microcontrollers and FPGAs operating at ≤66 MHz bus rates.
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; determines minimum read latency from address assertion to valid data on I/O pins |
| Supply Voltage | 4.5 V to 5.5 V; compatible with standard 5 V TTL/CMOS logic rails without regulation overhead |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments including factory automation and telecom line cards |
| Standby Current (ISB1) | 10 µA max at CMOS-level deselect (CS > VHC); enables ultra-low-power sleep modes |
| 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 |
Pinout & Package
Package: 32-pin Plastic SOJ (PBG32), 400-mil width, gull-wing leads, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus; selects one of 131,072 (128K) memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; direction controlled by CS/OE/WE states |
| CS | Chip Select | Active-low enable; device enters standby (ISB1 = 10 µA) when high |
| OE | Output Enable | Active-low control for output drivers; allows read data gating independent of CS |
| WE | Write Enable | Active-low signal initiating write cycle; latches data on I/O lines when CS and WE both low |
| VCC | Power Supply | +5 V supply (pins 16 and 24); center-placed to reduce power-ground loop inductance |
| GND | Ground | Reference ground (pins 17 and 23); symmetric placement minimizes ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/GND Pinout | Reduces simultaneous switching noise by 30–40% vs. corner-pin layouts, improving signal integrity in dense PCBs |
| Equal Access & Cycle Times | tAA = tRC = 15 ns ensures predictable timing margins for both read and write burst sequences |
| Low-Standby Power Mode | ISB1 = 10 µA at CMOS-level deselect enables battery-backed retention in power-critical systems |
| TTL-Compatible I/O | Eliminates need for external level shifters when interfacing with 5 V microcontrollers or CPLDs |
| Fully Static Operation | No clock, refresh circuitry, or wait-state logic required-simplifies system design and reduces BOM count |
Applications
| Industrial PLC Memory Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Storing real-time I/O mapping tables and firmware scratchpad in programmable logic controllers deployed in factory-floor cabinets. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state data storage for ARM7 or 8051-based control engines. Use Value: 15 ns access time enables sub-66 MHz bus operation; industrial temp rating ensures reliability at 85°C ambient cabinet temperatures. | Use Scenario: Caching protocol translation buffers and packet header lookups in T1/E1 framing IC interfaces on telecom shelf cards. IC Role / Device Role / Timing Role: Standalone 1 Mbit SRAM acting as dual-port-accessible buffer between serial framers and host processors. Use Value: Center-power/GND pinout suppresses noise coupling into sensitive analog timing circuits adjacent on shared backplane PCBs. |
| Medical Imaging Control Board RAM | Avionics Display Processor Frame Buffer |
Use Scenario: Holding configuration registers and calibration lookup tables in X-ray detector control modules subject to EMI in hospital environments. IC Role / Device Role / Timing Role: Non-volatile-configurable SRAM used for fast-access parameter storage during imaging acquisition bursts. Use Value: TTL-compatible I/O eliminates level-shifter components; ISB1 = 10 µA supports low-power idle states between scan cycles. | Use Scenario: Serving as pixel-addressable frame buffer for monochrome cockpit display processors in certified avionics hardware. IC Role / Device Role / Timing Role: High-reliability static RAM delivering deterministic read/write latency for real-time graphics rendering pipelines. Use Value: Fully static operation avoids refresh-induced jitter; PBG32 package supports conformal coating for moisture resistance in pressurized cabins. |
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-45ZAXI | 45 ns access time; 3.3 V supply only; 32-pin TSOP-II package | Requires voltage translation for 5 V systems; lower speed limits use in high-throughput control loops | Select only if migrating to 3.3 V architecture and timing budget allows ≥45 ns latency |
| AS6C1008-15PCN | 15 ns access; 5 V supply; 32-pin SOP package (not SOJ); higher ICC (200 mA vs. 155 mA) | SOP footprint incompatible with SOJ land pattern; higher active current increases thermal load | Choose only if board redesign accommodates SOP mounting and thermal management supports 200 mA dynamic draw |
Compared with CY62128EV30LL-45ZAXI and AS6C1008-15PCN, the IDT71124S15Y uniquely combines 15 ns speed, 5 V TTL compatibility, SOJ-32 mechanical fit, and industrial temperature qualification-making it the sole drop-in replacement for legacy designs requiring all four attributes.
Availability
IDT71124S15Y is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and avionics display processors requiring stable component supply across extended product lifecycles.
Supply support for IDT71124S15Y 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 IDT71124S15Y belongs to Renesas' legacy high-speed CMOS SRAM product line, originally developed by Integrated Device Technology (IDT) and maintained for long-lifecycle industrial and communications equipment where deterministic timing and 5 V compatibility remain critical.
FAQ
What is the maximum operating frequency supported by the IDT7124S15Y?
The IDT71124S15Y does not operate on a clock signal-it is an asynchronous SRAM. Its performance is defined by access and cycle times: tAA = 15 ns and tRC = 15 ns, corresponding to a maximum effective bus rate of approximately 66 MHz for consecutive read/write operations. The IDT71124S15Y requires no clock input and functions with any controller asserting valid address and control signals within these timing windows.
Does the IDT71124S15Y support both commercial and industrial temperature ranges?
Yes-the IDT71124S15Y is explicitly rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Renesas datasheet's "Orderable Part Information" table (part number IDT71124S15YGI). This makes the IDT71124S15Y suitable for deployment in harsh environments such as factory automation, outdoor telecom enclosures, and transportation control systems.
Can the IDT71124S15Y be used with a 3.3 V microcontroller?
No-the IDT71124S15Y is specified only for 5 V operation (VCC = 4.5 V to 5.5 V) and features TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). Direct connection to a 3.3 V microcontroller risks violating VIH min and may cause unreliable reads/writes. Interface requires level translation or a 5 V-tolerant MCU I/O bank. The IDT71124S15Y is not 3.3 V compatible.
What is the meaning of "Y" in the part number IDT71124S15Y?
The "Y" in IDT71124S15Y denotes the 400-mil Plastic SOJ package (PBG32), per Renesas' ordering nomenclature. It distinguishes this variant from tape-and-reel ("YG"), green/RoHS-compliant ("YGI"), or other packaging options. The IDT71124S15Y specifically indicates tube-packaged, industrial-grade, 15 ns SOJ-32 device-critical for correct PCB footprint and procurement alignment.
How does the JEDEC center-power/GND pinout improve system performance in the IDT71124S15Y?
The JEDEC center-power/GND pinout in the IDT71124S15Y places VCC (pin 16) and GND (pin 17) adjacent at the package center, reducing power-ground loop inductance and minimizing simultaneous switching output (SSO) noise. This layout lowers ground bounce by up to 40% compared to corner-pin configurations, directly improving signal integrity for high-speed address/data buses sharing the same PCB layer as the IDT71124S15Y.
IDT71124S15Y 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:
- 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
IDT71124S15Y FAQ
1.How can I place an order for IDT71124S15Y through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71124S15Y 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 IDT71124S15Y reliable?
The price and inventory of IDT71124S15Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71124S15Y is usually 5 days.
3.What payment methods are accepted for IDT71124S15Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71124S15Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71124S15Y?
IDT71124S15Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71124S15Y 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 IDT71124S15Y?
For technical support, including IDT71124S15Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71124S15Y requirements.
6.How does Aetrix verify that IDT71124S15Y is sourced from the original manufacturer or authorized distributors?
All IDT71124S15Y 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 IDT71124S15Y meets industry standards.
7.What is the process for return or replacement of IDT71124S15Y?
All IDT71124S15Y units undergo pre-shipment inspection (PSI). If there is an issue with IDT71124S15Y, 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 IDT71124S15Y part is unused and in its original packaging.
Return procedure for IDT71124S15Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71124S15Y Tags
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