2007-01-07 02:15:55 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
It sounds like you're talking about "back in the day", right? The 70's thru 90's? 74-series versus 4000? Assuming so...
TTL uses bipolar transistors, which are current-controlled devices, for logic gates. CMOS uses MOS transistors, which are voltage-controlled. TTL logic is, or at least used to be 5V-only, but CMOS could run in the range of 3-15V. TTL has the characteristic of drawing a practically a constant current, whereas CMOS drew a current roportional to clock speed. CMOS would draw much less current than TTL at low speeds, and about the same once you got above a few megahertz. TTL, especially the "S" flavors, could operate at much higher speed than CMOS, up into 20-30MHz. Top end to CMOS was around 3 MHz.
Nowadays there are so many flavors of both I can't keep up with them. But in general, both have gotten faster at less power.
2007-01-07 04:01:45 · answer #1 · answered by Gary H 6 · 1⤊ 0⤋
Apples and oranges. TTL is entire Transsitor good judgment and could observe to chips in spite of the shown fact that it may additionally observe to transistor technologies as adversarial to older tube technologies. CMOS is Complementary metallic Oxide Semiconductor and it refers to how the chip is made.
2016-12-12 06:04:45 · answer #2 · answered by fechter 4 · 0⤊ 0⤋
Apples and oranges. TTL is Total Transsitor Logic and can apply to chips but it can also apply to transistor technology as opposed to older tube technology. CMOS is Complementary Metal Oxide Semiconductor and it refers to how the chip is made.
2007-01-07 02:22:46 · answer #3 · answered by mskillingcantspell 1 · 0⤊ 2⤋
english please?
2007-01-07 02:18:04 · answer #4 · answered by Anonymous · 0⤊ 2⤋