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.
Related Guides
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
742792651 Ferrite Bead EMI Filter and Power Integrity Design Guide
Practical guidance for using 742792651 in ferrite-bead EMI filters, including bias, DCR, damping, layout, and validation.
Jul 11, 2026
How to Choose a Ferrite Bead for EMI Suppression Rails: Selection Guide
Compare 742792651 and related ferrite beads by impedance, current rating, DCR, package, layout, and EMI test context.
Jul 10, 2026
150141BS73100 Design Guide for 3528 Status Indicator LED Circuits
Design 3528 status indicator LED circuits with 150141BS73100: current setting, resistor sizing, polarity, optics, and sourcing checks.
Jul 10, 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.
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.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit