74HC42 Datasheet | Nexperia

description The 74HC42 is a one of ten BCD to decimal decoder. It accepts four BCD inputs (0A to 3A) and provides ten mutually exclusive outputs (0Y to 9Y). The logic design ensures that all outputs are HIGH when binary codes greater than nine are applied to the inputs. The most significant input (3A) produces an useful inhibit function when the device is used as a 1-of-8 decoder. The 3A input can also be used as the data input in an 8-output demultiplexer application. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits - plies with JEDEC standard no. 7A - Wide supply voltage range from 2.0 V to 6.0 V - CMOS low power dissipation - High noise immunity - Input levels: - For 74HC42 : CMOS level - Mutually exclusive outputs - 1-of-8 demultiplexing capability - Outputs disabled for input codes above nine - Latch-up performance exceeds 100 m A per JESD 78 Class II Level B - ESD protection: - HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V - CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V - Specified from -40 °C to +85 °C and -40 °C to +125 °C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name 74HC42D -40 °C to +125 °C SO16 Description Version plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 Nexperia 4. Functional diagram BCD to decimal decoder (1-of-10) 15 0A 14 1A 13 2A 12 3A 0Y 1 1Y 2 2Y 3 3Y 4 4Y 5 5Y 6 6Y 7 7Y 9 8Y 10 9Y 11 aaa-024429 Fig. 1. Logic symbol BCD/DEC 15 1 14 2 13 4 12 8 01 12 23 34 45 56 67 79 8 10 9 11 aaa-024430 Fig. 2. IEC logic symbol 0A 1A 2A 3A Fig. 4. Logic diagram 15 0A 14 1A 13 2A 12 3A 0Y 1 1Y 2 2Y...