M68AF127BL70MC1U STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
STMicroelectronics M68AF127BL70MC1U is a 1 Mbit (128K × 8-bit) asynchronous SRAM with 70 ns maximum access time in a 32-pin SOP package. Operates from 2.7 V to 3.6 V with full static operation requiring no refresh cycles. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 32
- Lifecycle
- OBSOLETE
- Datasheet
- M68AF127BL70MC1U Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 Mbit capacity organized as 128K × 8 bits with 70 ns maximum read access time for high-speed embedded data buffering
- Fully static CMOS design with no refresh requirement, simplifying memory controller interface and reducing system power
- 2.7 V to 3.6 V operating range in compact 32-pin SOP package for direct 3.3 V microcontroller bus interfacing
Applications
The M68AF127BL70MC1U serves as high-speed working memory in industrial controllers, communications equipment, and networking appliances where its 70 ns access time allows fast asynchronous bus reads without wait states at typical MCU clock rates. Embedded systems designers use it as a data buffer in barcode scanners, POS terminals, and handheld instruments that need 128 KB of byte-wide SRAM accessible without complex refresh logic. It is also deployed in FPGA prototype boards and DSP evaluation kits as an external program or data RAM operating in the 3.3 V domain.
Specifications
| YTEOL | 0 |
| Access Time-Max | 70ns |
| I/O Type | COMMON |
| JESD-30 Code | R-PDSO-G32 |
| Memory Density | 1048576bit |
| Memory IC Type | STANDARD SRAM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Words | 131072words |
| Number of Words Code | 128000 |
| Operating Mode | ASYNCHRONOUS |
| Organization | 128KX8 |
| Output Characteristics | 3-STATE |
| Output Enable | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP32,.56 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | PARALLEL |
| Standby Current-Max | 0.000015A |
| Standby Voltage-Min | 2V |
| Supply Current-Max | 0.015mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.41 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for M68AF127BL70MC1U:
Frequently Asked Questions
What is the memory capacity and organization of the M68AF127BL70MC1U?
The M68AF127BL70MC1U is organized as 131,072 words × 8 bits, giving a total capacity of 1,048,576 bits (1 Mbit). Its 8-bit data bus matches standard byte-wide microcontroller memory buses, and the 70 ns maximum access time ensures compatibility with processors running at bus clock frequencies up to approximately 14 MHz without requiring wait states.
How does the asynchronous SRAM interface of the M68AF127BL70MC1U simplify embedded system design compared to DRAM?
Unlike DRAM that demands periodic refresh cycles and a dedicated memory controller, the M68AF127BL70MC1U uses fully static CMOS cells needing only chip-enable, output-enable, and write-enable signals for access. This eliminates refresh overhead, simplifies firmware, and allows the memory to retain data indefinitely while powered at 2.7 V to 3.6 V, making integration into simple 8-bit or 16-bit MCU address buses straightforward.
What supply voltage range does the M68AF127BL70MC1U support and how does that affect 3.3 V system compatibility?
The M68AF127BL70MC1U operates from a supply of 2.7 V to 3.6 V, placing it squarely in the standard 3.3 V logic domain used by most modern ARM Cortex-M, DSP, and FPGA systems. No level-shifting circuitry is needed when interfacing directly to 3.3 V buses, and the 2.7 V lower limit provides margin for battery-powered equipment operating at reduced rail voltages.
When should an engineer choose the M68AF127BL70MC1U over a serial SPI flash for data buffering?
For applications requiring random-access read and write latency under 100 ns — such as real-time video frame buffers, high-throughput data loggers logging at over 1 MB/s, or lookup-table caches accessed mid-interrupt — the M68AF127BL70MC1U's parallel 8-bit bus and 70 ns access time outperform serial SPI flash that typically needs multiple clock cycles per byte at 40-80 MHz SPI clock, adding microseconds of latency per access.
Related Guides
How to Choose a USB Controller: Certification, Integration, and SDK Quality Compared Across Microchip, STMicroelectronics, NXP, TI, and Renesas
Compare USB controllers from Microchip, STM, NXP, TI, and Renesas across certification difficulty, integration ease, and documentation/SDK quality to choose the right IC for your design.
May 28, 2026
ADAU1361BCPZ Application Note: Audio Codec Design Guide for Embedded Systems
Complete design guide for the ADAU1361BCPZ stereo 96kHz/24-bit audio codec: power supply filtering, PLL startup sequence, PCB layout, SigmaDSP integration, and troubleshooting.
May 28, 2026
LM66100QDCKRQ1 Design Guide: Ideal Diode and Reverse Polarity Protection for Automotive Power Rails
Complete application note for the LM66100QDCKRQ1 AEC-Q100 ideal diode controller: PMOS selection, threshold tuning, RPP integration, layout, and automotive design pitfalls.
May 28, 2026
LM2904BQDGKRQ1 Selection Guide: Automotive Dual Op-Amp Variants, Packages, and Alternatives
How to choose the right LM2904BQ automotive dual op-amp variant: AEC-Q100 grade, offset voltage, package, and non-automotive alternatives explained.
May 27, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
More from STMicroelectronics
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”