Texas Instruments Inc may preach the gospel of centre-pin soldering for its custom chips (CI No 869), but Mitsubishi Electric Corp has yet to be converted. The Japanese company has now introduced its range of logic devices into the UK and claims that two new families – the bipolar Mitsubishi Advanced Schottky TTL, MAST M74F, and the 74HC-1 Advanced High Speed CMOS, M74HC-1 – achieve high performance speeds and low power dissipation without moving away from the industry standard HC family pinout. The MAST M74F, for example, has a power consumption of 5.4mW and an access time of 3.0nS. Attempts have also been made to reduce interference; the M74HC-1 series claims a noise switching reduction of 50% over competing logic families, while ringing has been tackled through reducing output transmission time and speeding up the logic terminal to ensure that overall speed is not sacrificed.
