74HC42D

BCD to decimal decoder (1-of-10)

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 V_CC.

Orderable parts

Type number	Orderable part number	Ordering code (12NC)	Package	Buy from distributors
74HC42D	74HC42D,653	933714860653	SOT109-1	Order product
74HC42D	74HC42D,652	933714860652	SOT109-1	Order product

BCD to decimal decoder (1-of-10)

Buy from Nexperia

SKU	Stock*	MOQ	Price per unit**	Quantity

Buy from distributors

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

Seller	SKU	Stock	MOQ		1	10	100	1,000	10,000	Purchase

* Stock values are subject to change
** Displayed price per unit is based on small quantity orders
*** Authorized resellers for overstock, mature, and discontinued products which are warranted for reliability by the reseller, no longer by Nexperia

Features and benefits

Complies with JEDEC standard no. 7A
Input levels:
- For 74HC42: CMOS level
Mutually exclusive outputs
1-of-8 demultiplexing capability
Outputs disabled for input codes above nine
ESD protection:
- HBM JESD22-A114F exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C and -40 °C to +125 °C

Applications

Driving LED displays
Driving incandescent displays
Driving fluorescent displays
Driving LCD displays
Driving gas discharge displays

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	Ψ_th(j-top) (K/W)	R_th(j-c) (K/W)	Package name
74HC42D	Production	2.0 - 6.0	CMOS	± 5.2	17	low	-40~125	73	1.1	31	SO16

Package

Type number	Orderable part number, (Ordering code (12NC))	Status	Marking	Package	Package information	Reflow-/Wave soldering	Packing
74HC42D	74HC42D,653 ( 9337 148 60653 )	Active	74HC42D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC
74HC42D	74HC42D,652 ( 9337 148 60652 )	Active	74HC42D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack, CECC

Quality, reliability & chemical content

Type number	Orderable part number	Chemical content	RoHS / RHF	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74HC42D	74HC42D,653	74HC42D		84.9	6.62	1.51E8	1	1
74HC42D	74HC42D,652	74HC42D		84.9	6.62	1.51E8	1	1

Quality and reliability disclaimer

Series

74HC42 - BCD to decimal decoder (1-of-10)

Documentation (5)

File name	Title	Type	Date
74HC42	BCD to decimal decoder (1-of-10)	Data sheet	2017-03-17
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08

Support

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Ordering, pricing & availability

Type number	Orderable part number	Ordering code (12NC)	Packing	Buy online
74HC42D	74HC42D,653	933714860653	Reel 13" Q1/T1 CECC	Order product
74HC42D	74HC42D,652	933714860652	Bulk Pack, CECC	Order product

Sample

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