Overview
The M27C801-55K1 is an 8 Mbit EPROM (Erasable Programmable Read-Only Memory) produced by STMicroelectronics. It is available in two main types: UV (ultra violet erase) and OTP (one time programmable). This device is organized as 1,048,576 by 8 bits, making it suitable for applications requiring fast turn-around and pattern experimentation.
The M27C801-55K1 is offered in various packages, including FDIP32W (window ceramic frit-seal package), PDIP32, and PLCC32. The FDIP32W package features a transparent lid that allows the chip to be exposed to ultraviolet light for erasure, while the PDIP32 and PLCC32 packages are used for one-time programmable applications where erasure is not required. STMicroelectronics also offers the M27C801 in ECOPACK® packages, which are lead-free and comply with JEDEC Standard JESD97.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage in Read Operation | 5 V ± 10% | V |
| Access Time | 55 ns | ns |
| Active Current at 5 MHz | 35 mA | mA |
| Standby Current | 100 µA | µA |
| Programming Voltage | 12.75 V ± 0.25 V | V |
| Programming Time per Word | 50 µs | µs |
| Ambient Operating Temperature | –40 to 125 °C | °C |
| Storage Temperature | –65 to 150 °C | °C |
| Input/Output Voltage (except A9) | –2 to 7 V | V |
| A9 Voltage | –2 to 13.5 V | V |
| Program Supply Voltage | –2 to 14 V | V |
Key Features
- Fast Access Time: 55 ns, ensuring quick data retrieval.
- Low Power Consumption: Active current of 35 mA at 5 MHz and standby current of 100 µA.
- Programming Efficiency: 50 µs programming time per word with a programming voltage of 12.75 V ± 0.25 V.
- Electronic Signature: Allows the reading of a binary code to identify the manufacturer and device type.
- ECOPACK® Packages: Lead-free packages that comply with JEDEC Standard JESD97.
- Multiple Package Options: Available in FDIP32W, PDIP32, and PLCC32 packages to suit different application needs.
- Standby Mode: Reduces supply current to 100 µA when the device is not in active use.
Applications
The M27C801-55K1 is ideally suited for various applications where fast turn-around and pattern experimentation are crucial. These include:
- Embedded Systems: Where the need for quick programming and erasure is essential.
- Industrial Control Systems: For storing firmware or configuration data that may need periodic updates.
- Aerospace and Defense: Where the reliability and performance of the EPROM are critical.
- Automotive Systems: For applications requiring robust and reliable non-volatile memory.
Q & A
- What is the storage capacity of the M27C801-55K1?
The M27C801-55K1 has a storage capacity of 8 Mbit, organized as 1,048,576 by 8 bits.
- What are the different package options available for the M27C801-55K1?
The device is available in FDIP32W, PDIP32, and PLCC32 packages.
- How does the standby mode affect the power consumption of the M27C801-55K1?
In standby mode, the supply current reduces from 35 mA to 100 µA.
- What is the programming voltage and time for the M27C801-55K1?
The programming voltage is 12.75 V ± 0.25 V, and the programming time per word is 50 µs.
- How is the electronic signature mode activated on the M27C801-55K1?
The electronic signature mode is activated by forcing 11.5V to 12.5V on address line A9 and toggling address line A0 from VIL to VIH.
- What are the ambient operating and storage temperature ranges for the M27C801-55K1?
The ambient operating temperature range is –40 to 125 °C, and the storage temperature range is –65 to 150 °C.
- What is the access time of the M27C801-55K1?
The access time is 55 ns.
- How does the ECOPACK® packaging benefit the environment?
The ECOPACK® packages are lead-free and comply with JEDEC Standard JESD97, making them more environmentally friendly.
- Can multiple M27C801-55K1 devices be programmed in parallel?
Yes, multiple devices can be programmed in parallel with different data by applying a TTL low level pulse to the E input of the device to be programmed while keeping the E input of other devices high.
- What is the purpose of the Margin Mode in the programming process of the M27C801-55K1?
The Margin Mode ensures that each cell is programmed with enough margin for reliability by applying a sequence of 50 µs program pulses until a correct Verify occurs.
