Long-Term Operation Even With Compact Low-Capacity Batteries

9th September 2013

Jacqueline Regnier

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LAPIS Semiconductor has recently announced the development of ultra-low power microcontrollers designed for devices such as watches or security tokens1 that require long-term operation using just coin or dry-cell batteries. The ML610Q474 family features industry-low current consumption (0.25uA in Halt mode*2) – 50% lower than conventional products – along with high noise immunity.

Security tokens used to generate one-time passwords for the rapidly expanding internet banking market or battery-driven applications such as watches and clocks demand stable operation for years powered with just a single button battery. LAPIS Semiconductor meets this need through an original design that provides the industry's lowest current consumption.

The ML610Q470 series integrates a recently developed internal regulator and oscillator circuit and adopts proprietary low-leakage current processes for the lowest power consumption on the market - ½ that of conventional products. In addition, high noise immunity is ensured through novel internal circuitry and layout (clearing ±30KV* during IEC61000-4-2 noise immunity testing), unlike conventional models that were prone to noise-induced malfunction when the current consumption was lowered. This combination of low current consumption and high noise immunity makes stable long-term operation possible using inexpensive low-capacity coin cell batteries, contributing to lower costs and smaller form factors.

A total support system including an ML610Q474 reference board and software development environment are provided to facilitate evaluation. Additional support tools such as user manuals and tools are offered online (registration required).

*Measured by indirect discharge using a LAPIS Semiconductor reference board

Key Features

All functions required for security tokens are integrated into a single chip
Equipped with LAPIS Semiconductor’s original high-performance 8bit RISC core
Lower power consumption
0.25μA current consumption in Halt mode
Integrated 16KB Flash memory (ML610Q474, ML610Q475, and ML610Q476)
- [ML610474, ML610475, and ML610476 are also offered that include 16kB ROM instead of Flash]
Built-in 1KB RAM
Packages: Bare die, 80pin TQFP

Applications