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Classification of CMOS Logic ICs and Overview of Each Series

Since the launch of the first Standard CMOS series (4000 series),
Toshiba has released successive generations of high-speed and low-voltage CMOS logic ICs.

Toshiba continues to supply CMOS logic ICs with a wide operating range (1.2 V to 18 V) suitable for various applications.

FAQ : What are the differences among the general-purpose logic IC series?

Type	Series	Part number	Operating voltage range (V)	Propagation delay time (ns)^*1	Output current (mA)^*2	Input-tolerant function^*3	Output power-down protection^*3
For 5-V Systems	Standard CMOS	TC4000B TC4500B	3 to 18	200 (at 5.0V)	±0.51 (at 5.0V)	-^*4	-
	High-Speed CMOS	TC74HC	2 to 6	23 (at 4.5V)	±4.0 or ±6.0 (at 4.5V)	-^*4	-
	High-Speed CMOS	TC74HCT	4.5 to 5.5	23 (at 4.5V)	±4.0 or ±6.0 (at 4.5V)	-^*4	-
	Advanced CMOS	TC74AC	2 to 5.5	8.5 (at 4.5V)	±24 (at 4.5V)	-	-
	Advanced CMOS	TC74ACT	4.5 to 5.5	8.5 (at 4.5V)	±24 (at 4.5V)	-	-
	Very-High-Speed CMOS	TC74VHC 74VHC TC74VHC9 74VHC9	2 to 5.5	8.5 (at 4.5V)	±8.0 (at 4.5V)	✔	-
		TC74VHCT 74VHCT	4.5 to 5.5		±8.0 (at 4.5V)	✔	✔
		TC74VHCV 74VHCV	1.8 to 5.5		±16 (at 4.5V)	✔	✔
For low-voltage systems	Low-Voltage CMOS	TC74LCX 74LCX	1.65 to 3.6	6.5 (at 3.0V)	±24 (at 3.0V)	✔	✔
For low-voltage systems	Very-Low-Voltage CMOS	TC74VCX	1.2 to 3.6	4.2 (at 2.3V)	±24 (at 3.0V)	✔	✔

*1: Maximum propagation delay time of typical ICs (TC4001, 74HC244, TC74AC244, 74VHC244, 74LCX244, and TC74VCX244) at 85°C, except for the TC4001 for which the maximum propagation delay time at 25°C is shown

*2: Those output current values are from DC characteristics table of the datasheet. Absolute maximum rated output current is specified separately.

*3: The terms “tolerant function” and “power-down protection” are sometimes used interchangeably. The input- and output-tolerant functions may be referred to as input and output power-down protection, respectively.

*4: TC4049BF/BP, TC4050BF/BP, TC74HC4049BP/BF/BFT, 74HC4049D, TC74HC4050BP/BF/BFT and 74HC4050D have the input-tolerant function that allows level shifting from a higher voltage to a lower voltage.