My Inquiry
My Account
Renesas 71124S12YG8
- Part No.:
- 71124S12YG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71124S12YG8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,181
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
71124S12YG8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with JEDEC center-power/ground pinout, 12 ns access time, 5 V single-supply operation, and TTL-compatible bidirectional I/O - deployed in real-time industrial controllers requiring deterministic memory latency.
For engineers reviewing the 71124S12YG8 datasheet, 71124S12YG8 pinout, 71124S12YG8 application, or 71124S12YG8 equivalent, this page delivers verified timing parameters, SOJ-32 package mapping, commercial-grade (-0°C to +70°C) thermal specs, and direct alternatives for legacy SRAM replacement in embedded control systems.
Technical Context
The 71124S12YG8 implements fully static asynchronous circuitry-no clocks or refresh required-and uses center-aligned VCC/GND pins (pins 11 and 20) to minimize simultaneous switching noise. Its dual-control architecture separates chip select (CS) and output enable (OE), enabling fast 6 ns OE-to-output valid timing independent of address changes.
It supports WE-controlled and CS-controlled write cycles with guaranteed tAW (8 ns), tWP (8 ns), and tDW (6 ns) at 12 ns speed grade. Standby current drops to 10 mA (ISB1, CMOS-level deselect) and 40 mA (ISB, TTL-level deselect), enabling low-power hold modes in battery-backed systems.
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) | 12 ns max; enables ≤83.3 MHz burst read throughput in synchronous interface glue logic. |
| Supply Voltage | 4.5 V to 5.5 V; compatible with standard 5 V TTL/CMOS system rails without regulation overhead. |
| Operating Temperature | 0°C to +70°C; validated for commercial-grade industrial PLC backplanes and instrumentation front-ends. |
| I/O Compatibility | TTL-compatible inputs and outputs; interfaces directly with 74LS/74HC logic without level shifters. |
| Standby Current (ISB1) | 10 mA max at VCC = 5.5 V, f = 0; reduces idle power in always-on monitoring subsystems. |
| Package | 32-pin 400-mil Plastic SOJ (PBG32); surface-mount compatible with standard reflow profiles. |
Pinout & Package
71124S12YG8 is housed in a 32-pin Plastic SOJ (PBG32) package with JEDEC-standard center-power/ground layout-VCC on pin 11 and GND on pin 20-to suppress ground bounce and improve signal integrity in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word decoding; no internal latching required. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; direction controlled by WE and OE states per cycle. |
| CS | Chip Select | Active-low enable; device enters standby (ISB/ISB1) when high, reducing dynamic current. |
| OE | Output Enable | Active-low control for output drivers; enables fast 6 ns read access independent of CS timing. |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CS is low; controls data capture window. |
| VCC (Pin 11) | Power Supply | Center-placed 5 V supply pin minimizes IR drop and noise coupling across array. |
| GND (Pin 20) | Ground Reference | Center-placed ground pin provides low-inductance return path for I/O and core logic. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center-Power/Ground Pinout | Reduces simultaneous switching noise by 30–40% vs. corner-pin SOJ, improving signal margin in mixed-signal systems. |
| Asynchronous Static Operation | Eliminates clock tree design, refresh controller logic, and associated timing constraints in microcontroller co-processor memory buffers. |
| Dual-Enable Control (CS + OE) | Enables partial-memory reads without full chip activation-reducing dynamic power in burst-access firmware routines. |
| Low Standby Current (ISB1 = 10 mA) | Supports >10-year battery backup in nonvolatile configuration storage for field-programmable gate arrays and DSP boot loaders. |
| 12 ns Read Cycle (tRC) | Meets timing closure for 20 MHz Z80/8086-compatible bus cycles with zero wait states in legacy compute modules. |
Applications
| Industrial PLC Data Buffers | Medical Imaging Frame Stores |
|---|---|
|
Use Scenario: Real-time I/O scan buffering in modular programmable logic controllers with deterministic 10 ms cycle times. IC Role / Device Role / Timing Role: High-speed scratchpad memory holding input/output image tables between CPU scan phases. Use Value: 12 ns tAA ensures full 128K buffer update completes within 1.3 ms-well under PLC scan budget-without pipeline stalls. |
Use Scenario: Temporary frame storage in portable ultrasound devices during analog-to-digital conversion bursts. IC Role / Device Role / Timing Role: Byte-wide FIFO buffer synchronizing 12-bit ADC streams to ARM Cortex-M4 DMA controllers. Use Value: TTL-compatible I/O eliminates level-shifter components; 400-mil SOJ footprint fits compact handheld PCBs. |
| Avionics Sensor Loggers | Test Equipment Pattern Memory |
|
Use Scenario: Nonvolatile event logging in DO-254-compliant flight data recorders with battery-backed SRAM retention. IC Role / Device Role / Timing Role: Low-ISB1 memory preserving last 16K samples during main power loss transitions. Use Value: 10 mA ISB1 enables >72-hour retention on coin-cell backup; center-GND layout resists EMI in cockpit harness environments. |
Use Scenario: Vector pattern storage in automated test equipment generating 50 MHz digital stimulus waveforms. IC Role / Device Role / Timing Role: Static memory feeding parallel comparators in boundary-scan test engines. Use Value: 12 ns tRC supports 83.3 MHz pattern rate; SOJ-32 allows dense placement near FPGA I/O banks. |
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-45ZSXIT | 512K × 8-bit, 45 ns access, 3.3 V supply, TSOP-32 package | Higher density but slower speed and lower voltage; requires level translation in 5 V systems | Select only if migrating to 3.3 V architecture and accepting 3.75× longer access latency. |
| AS6C1008-12TIN | 128K × 8-bit, 12 ns access, 5 V supply, SOJ-32 package, -40°C to +85°C industrial grade | Same organization/speed/package but wider temperature range; ISB1 = 20 mA (vs. 10 mA) | Prefer for new designs requiring extended temp operation where 10 mA standby is not critical. |
Compared with 71124S12YG8, CY62128EV30LL-45ZSXIT trades speed and voltage compatibility for density, while AS6C1008-12TIN matches speed and package but extends temperature range at the cost of 2× standby current-making 71124S12YG8 optimal for cost-sensitive commercial 5 V systems prioritizing ultra-low ISB1.
Availability
71124S12YG8 is available at Aetrix Electronics and suitable for industrial PLC data buffers, medical imaging frame stores, and avionics sensor loggers requiring stable component supply across long-lifecycle embedded programs.
Supply support for 71124S12YG8 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 IoT applications.
The 71124S12YG8 belongs to Renesas' legacy high-speed CMOS SRAM product line-designed specifically for deterministic, low-latency memory interfacing in 5 V microprocessor and microcontroller systems.
FAQ
What is the maximum operating frequency supported by the 71124S12YG8?
The 71124S12YG8 does not operate on a clock; it is an asynchronous SRAM. Its 12 ns access time (tAA) and 12 ns read cycle time (tRC) support effective data rates up to 83.3 MHz in burst-read configurations. System-level timing depends on bus controller setup/hold margins-not an internal clock frequency.
Does the 71124S12YG8 require refresh circuitry or external clocks?
No. The 71124S12YG8 uses fully static CMOS memory cells and asynchronous control logic-no refresh cycles, clocks, or timing generators are needed. It retains data indefinitely as long as VCC is applied and CS remains asserted or in standby mode.
Is the 71124S12YG8 pin-compatible with other speed grades in the 71124 family?
Yes. All 71124 variants-including 71124S12YG8, 71124S15YG8, and 71124S20YG8-share identical PBG32 SOJ-32 pinout, signal assignments, and DC/AC interface behavior. Only timing parameters differ; no PCB redesign is needed when upgrading speed grade.
What is the meaning of "Y" and "G" in the part number 71124S12YG8?
In 71124S12YG8, "Y" denotes green (lead-free, RoHS-compliant) packaging, "G" specifies the 400-mil SOJ (PBG32) package, and "8" indicates tape-and-reel packaging format. The "S12" suffix confirms the 12 ns speed grade.
Can the 71124S12YG8 be used in industrial temperature applications?
No. The 71124S12YG8 is rated only for commercial temperature range (0°C to +70°C). Industrial-grade operation (–40°C to +85°C) is available for 15 ns and 20 ns speed grades (e.g., 71124S15YGI8), but Renesas explicitly documents no industrial variant for the 12 ns version.
71124S12YG8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
71124S12YG8 FAQ
1.How can I place an order for 71124S12YG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71124S12YG8 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 71124S12YG8 reliable?
The price and inventory of 71124S12YG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71124S12YG8 is usually 5 days.
3.What payment methods are accepted for 71124S12YG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71124S12YG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71124S12YG8?
71124S12YG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71124S12YG8 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 71124S12YG8?
For technical support, including 71124S12YG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71124S12YG8 requirements.
6.How does Aetrix verify that 71124S12YG8 is sourced from the original manufacturer or authorized distributors?
All 71124S12YG8 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 71124S12YG8 meets industry standards.
7.What is the process for return or replacement of 71124S12YG8?
All 71124S12YG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71124S12YG8, 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 71124S12YG8 part is unused and in its original packaging.
Return procedure for 71124S12YG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71124S12YG8 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
