Overview
The M27W401-80K6 is a 4 Mbit low voltage EPROM (Erasable Programmable Read-Only Memory) produced by STMicroelectronics. This device is available in both UV (ultra violet erase) and OTP (one time programmable) versions. It is designed for microprocessor systems that require large data or program storage, organized as 524,288 by 8 bits.
The M27W401 operates with a supply voltage as low as 2.7V, making it suitable for applications where power consumption is a critical factor. The device is also available in various packages, including FDIP32W, PDIP32, PLCC32, and TSOP32, to meet different application needs.
Key Specifications
| Specification | Value |
|---|---|
| Capacity | 4 Mbit (512Kb x 8) |
| Supply Voltage (Read Operation) | 2.7V to 3.6V |
| Access Time | 70 ns at VCC = 3.0V to 3.6V, 80 ns at VCC = 2.7V to 3.6V |
| Standby Current | 15 µA Max. |
| Active Current at 5 MHz | 15 mA Max. |
| Programming Time | 100 µs/byte |
| ESD Protection | 2,000V |
| Latchup Protection Immunity | 200 mA |
| Electronic Signature | Manufacturer Code: 20h, Device Code: 41h |
| Packages | FDIP32W, PDIP32, PLCC32, TSOP32 (8 x 20 mm) |
| Operating Temperature Range | –40 to 85°C |
Key Features
- Low Voltage Operation: The M27W401 operates with a supply voltage as low as 2.7V, reducing power consumption and allowing for smaller battery sizes or longer battery life.
- High Reliability: The device features high reliability CMOS technology with 2,000V ESD protection and 200 mA latchup protection immunity.
- Fast Access Time: Access times of 70 ns at VCC = 3.0V to 3.6V and 80 ns at VCC = 2.7V to 3.6V ensure quick data retrieval.
- Low Power Consumption: The device has a standby current of 15 µA Max. and an active current of 15 mA Max. at 5 MHz.
- Electronic Signature: The device supports electronic signature mode for easy identification by programming equipment.
- ECOPACK® Packages: Available in lead-free ECOPACK® packages, which meet environmental requirements and are compliant with JEDEC Standard JESD97.
Applications
The M27W401 is ideally suited for microprocessor systems requiring large data or program storage. It is commonly used in:
- Embedded systems where low power consumption is critical.
- Portable electronic devices such as handheld instruments and mobile phones.
- Automotive systems, though users should note that non-automotive grade devices are used at the user's own risk.
- Industrial control systems and other applications where reliable, low-voltage memory is necessary.
Q & A
- What is the capacity of the M27W401 EPROM?
The M27W401 has a capacity of 4 Mbit, organized as 524,288 by 8 bits.
- What is the operating voltage range for the M27W401?
The device operates with a supply voltage of 2.7V to 3.6V in read mode.
- What are the access times for the M27W401?
The access times are 70 ns at VCC = 3.0V to 3.6V and 80 ns at VCC = 2.7V to 3.6V.
- What is the standby current of the M27W401?
The standby current is 15 µA Max.
- How long does it take to program the M27W401?
The programming time is 100 µs per byte.
- What is the ESD protection level of the M27W401?
The device has 2,000V ESD protection.
- What packages are available for the M27W401?
The device is available in FDIP32W, PDIP32, PLCC32, and TSOP32 (8 x 20 mm) packages.
- Does the M27W401 support electronic signature?
Yes, the device supports electronic signature mode for easy identification by programming equipment.
- Are the M27W401 packages lead-free?
Yes, the M27W401 is available in lead-free ECOPACK® packages.
- What is the operating temperature range for the M27W401?
The operating temperature range is –40 to 85°C.
