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Renesas IDT71024S12Y
- Part No.:
- IDT71024S12Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71024S12Y.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
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Product details
Overview
IDT71024S12Y from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, TTL-compatible I/O, single 5 V supply operation, and industrial temperature range (–40°C to +85°C). It serves as a fast, fully static asynchronous memory buffer in real-time control systems requiring deterministic read/write latency without refresh overhead.
For engineers reviewing the IDT71024S12Y datasheet, IDT71024S12Y pinout, IDT71024S12Y application, or IDT71024S12Y equivalent, key selection criteria include guaranteed 12 ns tAA and tRC timing, dual chip select architecture for bank decoding, OE-controlled output enable with 6 ns tOE, and SOJ-32 package compatibility with legacy memory sockets.
Technical Context
The IDT71024S12Y implements fully static asynchronous logic with no clocks or refresh cycles required. Its bidirectional I/O pins operate at TTL voltage levels (VIH = 2.2 V min, VIL = 0.8 V max) and support direct interfacing with 5 V microcontrollers and FPGAs.
Two independent chip selects (CS1, CS2) and one output enable (OE) provide hierarchical memory enable control: CS1/CS2 jointly select the device, while OE gates output drivers independently-enabling bus sharing and low-latency read strobing with tOE ≤ 6 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), fixed parallel interface with no internal addressing multiplexing |
| Access Time (tAA) | 12 ns maximum - guarantees data valid within 12 ns of address/CS assertion, enabling 83 MHz burst read capability |
| Read Cycle Time (tRC) | 12 ns maximum - supports consecutive reads at up to 83 MHz without inter-cycle delay |
| Supply Voltage | 5.0 V ± 10% (4.5–5.5 V) - compatible with standard 5 V logic rails and legacy system power domains |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and outdoor embedded controllers |
| Standby Current (ISB1) | 10 mA maximum at VCC max - enables low-power hold mode when both CS1 ≥ VHC and CS2 ≤ VLC |
| I/O Capacitance | CI/O ≤ 8 pF - minimizes signal integrity impact on high-speed buses and reduces trace termination complexity |
Pinout & Package
Package: 32-pin Plastic SOJ (300 mil width, PJG32 footprint), surface-mount, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0 LSB to A16 MSB) - fully decoded for 128K word selection; no multiplexing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path - direction controlled by WE and CS states; high-impedance when deselected or during write |
| CS1, CS2 | Chip Select Inputs | Active-low (CS1) and active-high (CS2) pair - both must be asserted simultaneously for device enable; enables multi-bank decoding |
| OE | Output Enable | Active-low - controls output driver state independently of CS; allows fast read gating without full chip deselect |
| WE | Write Enable | Active-low - initiates write cycle when CS1/CS2 active; latches data on rising edge of WE |
| VCC, GND | Power Supply | Single 5 V supply with dedicated VCC (pin 24) and GND (pin 16); decoupling recommended per JEDEC SOJ guidelines |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns Read Access (tAA) | Enables integration into 8051, Z80, and early ARM7-based systems with no wait-state insertion |
| Dual Chip Select Architecture | Supports seamless memory banking in systems with >128 KB address space via CS1/CS2 logic decoding |
| 6 ns Output Enable Delay (tOE) | Permits precise strobe-based read capture in FPGA glue logic or CPLD-controlled timing-critical interfaces |
| CMOS-Level Standby (ISB1 = 10 mA) | Reduces system standby power by >75% vs. TTL SRAMs, critical for battery-backed industrial controllers |
| TTL-Compatible I/O | Eliminates level-shifter requirements when interfacing with 5 V microcontrollers, PLDs, and ASICs |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Code Cache |
|---|---|
|
Use Scenario: Real-time I/O scanning and ladder logic execution in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-speed scratchpad memory for temporary variable storage and instruction buffering between scan cycles. Use Value: 12 ns tAA ensures deterministic response to input changes within single scan period; ISB1 ≤ 10 mA extends backup battery life during power loss. |
Use Scenario: External program/data memory expansion for 8-bit MCUs (e.g., Intel 8051, Motorola 68HC11) in test equipment and medical devices. IC Role / Device Role / Timing Role: Non-refreshed code/data RAM mapped into external memory space with zero-wait-state operation. Use Value: tRC = 12 ns matches MCU bus timing without wait-state generators; SOJ-32 footprint fits legacy PCB layouts. |
| Motor Drive Position Lookup Table | Communications Protocol Stack Buffer |
|
Use Scenario: Storing sinusoidal commutation tables and PID coefficient sets in brushless DC motor drives. IC Role / Device Role / Timing Role: Static lookup table memory accessed synchronously with PWM update cycles. Use Value: Fully static operation eliminates jitter from refresh cycles; industrial temp rating ensures reliability near power electronics heat sources. |
Use Scenario: Frame buffering for RS-485/Modbus or CAN-to-serial gateways in factory automation networks. IC Role / Device Role / Timing Role: Dual-port accessible buffer for simultaneous protocol stack processing and physical layer handshaking. Use Value: Bidirectional I/O and independent OE allow concurrent CPU read and UART write operations without bus contention. |
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-12ZSXIT | 128K × 8, 12 ns, 3.3 V core (5 V tolerant I/O), TSOP-32 package | Requires level translation for pure 5 V systems; lower dynamic current (ICC = 45 mA) but incompatible VCC domain | Select when migrating to 3.3 V logic infrastructure; not drop-in for 5 V-only designs |
| AS6C1008-12TIN | 128K × 8, 12 ns, 5 V, SOJ-32, higher ISB (30 mA) and wider tCHZ (12 ns) | Same pinout and voltage, but slower output disable and higher standby draw limits battery-backed use | Acceptable for commercial-temp cost-sensitive replacements where ISB1 < 15 mA is not required |
Compared with CY62128EV30LL-12ZSXIT and AS6C1008-12TIN, the IDT71024S12Y uniquely delivers 10 mA ISB1 at 5 V with industrial temp rating and SOJ-32 compatibility-making it the only choice for legacy 5 V industrial systems needing ultra-low standby power and drop-in replacement assurance.
Availability
IDT71024S12Y is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller-based instrumentation, and motor drive control modules requiring stable component supply across extended product lifecycles.
Supply support for IDT71024S12Y 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 is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.
The IDT71024S12Y belongs to Renesas' legacy high-speed CMOS SRAM product line, designed specifically for pin-compatible replacement of aging 5 V memory in industrial control and test equipment.
FAQ
What is the operating voltage range for the IDT71024S12Y?
The IDT71024S12Y operates from a single 5.0 V supply with a tolerance of ±10%, meaning its valid VCC range is 4.5 V to 5.5 V. This specification is confirmed in the DC Operating Conditions table of the official Renesas datasheet (Rev. Mar. 30, 2021), and the device is not rated for 3.3 V operation. Using IDT71024S12Y outside this range may cause functional failure or accelerated wear.
Does the IDT71024S12Y require refresh circuitry?
No, the IDT71024S12Y is a fully static RAM and requires no refresh cycles or clocks for data retention. Its internal circuitry maintains stored data indefinitely as long as power is applied and inputs remain within specified voltage levels. This characteristic is explicitly stated in the device description section of the Renesas datasheet and is fundamental to the IDT71024S12Y's use in deterministic real-time systems.
What is the function of the CS2 pin on the IDT71024S12Y?
CS2 is an active-high chip select input that-when used in conjunction with active-low CS1-fully enables the IDT71024S12Y. Both CS1 and CS2 must be asserted (CS1 = LOW, CS2 = HIGH) for read or write operations. This dual-CS architecture allows flexible memory banking and prevents partial selection glitches. The truth table and timing diagrams in the IDT71024S12Y datasheet confirm CS2's role in device activation.
Can the IDT71024S12Y be used in industrial temperature environments?
Yes, the IDT71024S12Y is qualified for industrial temperature operation from –40°C to +85°C, as verified in the Ordering Information and Recommended Operating Conditions sections of the Renesas datasheet. The "Y" suffix in IDT71024S12Y explicitly denotes industrial grade, and the device undergoes screening per industrial reliability standards-making it suitable for deployment in motor drives, factory controllers, and outdoor telemetry hardware.
What package type does the IDT71024S12Y use?
The IDT71024S12Y uses a 32-pin Plastic SOJ (Small Outline J-lead) package with 300 mil body width (PJG32). This is confirmed in the Pin Configuration diagram, Ordering Information table, and package code "TY" in the Renesas datasheet. The SOJ-32 footprint provides mechanical and thermal characteristics suited for industrial PCB assembly and is compatible with legacy memory socket footprints.
IDT71024S12Y 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:
- 12ns
- Access Time:
- 12 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
IDT71024S12Y FAQ
1.How can I place an order for IDT71024S12Y through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71024S12Y 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 IDT71024S12Y reliable?
The price and inventory of IDT71024S12Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71024S12Y is usually 5 days.
3.What payment methods are accepted for IDT71024S12Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71024S12Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71024S12Y?
IDT71024S12Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71024S12Y 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 IDT71024S12Y?
For technical support, including IDT71024S12Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71024S12Y requirements.
6.How does Aetrix verify that IDT71024S12Y is sourced from the original manufacturer or authorized distributors?
All IDT71024S12Y 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 IDT71024S12Y meets industry standards.
7.What is the process for return or replacement of IDT71024S12Y?
All IDT71024S12Y units undergo pre-shipment inspection (PSI). If there is an issue with IDT71024S12Y, 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 IDT71024S12Y part is unused and in its original packaging.
Return procedure for IDT71024S12Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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