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
What are the key features of M68AF127BL70MC1U?
- 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
What is M68AF127BL70MC1U used for?
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.
What are the specifications of M68AF127BL70MC1U?
| 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 |
Where can I find the M68AF127BL70MC1U datasheet?
M68AF127BL70MC1U Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for M68AF127BL70MC1U?
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.
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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.
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