74HC238-Q100; 74HCT238-Q100

3-to-8 line decoder/demultiplexer

The 74HC238-Q100; 74HCT238-Q100 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs and one inverter. The '238 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V_CC.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

Features and benefits

Automotive product qualification in accordance with AEC-Q100 (Grade 1)
- Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active HIGH mutually exclusive outputs
Multiple package options
Complies with JEDEC standard no. 7A
Input levels:
- For 74HC238: CMOS level
- For 74HCT238: TTL level
ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of solder joints

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
74HC238BQ-Q100	Production	2.0 - 6.0	CMOS	± 5.2	14	low	-40~125	94	14.4	63	DHVQFN16
74HC238D-Q100	Production	2.0 - 6.0	CMOS	± 5.2	14	low	-40~125	93	10.0	53	SO16
74HC238PW-Q100	Production	2.0 - 6.0	CMOS	± 5.2	14	low	-40~125	126	4.8	55.6	TSSOP16
74HCT238BQ-Q100	Production	4.5 - 5.5	TTL	± 4	18	low	-40~125	94	14.4	63	DHVQFN16
74HCT238D-Q100	Production	4.5 - 5.5	TTL	± 4	18	low	-40~125	93	10.0	53	SO16
74HCT238PW-Q100	Production	4.5 - 5.5	TTL	± 4	18	low	-40~125	126	4.8	55.6	TSSOP16

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC238BQ-Q100	DHVQFN16 (SOT763-1)	SOT763-1		SOT763-1_115	Active	HC238	74HC238BQ-Q100X ( 9353 003 33115 )
74HC238D-Q100	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HC238D	74HC238D-Q100J ( 9353 000 44118 )
74HC238PW-Q100	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HC238	74HC238PW-Q100J ( 9353 000 45118 )
74HCT238BQ-Q100	DHVQFN16 (SOT763-1)	SOT763-1		SOT763-1_115	Active	HCT238	74HCT238BQ-Q100X ( 9353 003 34115 )
74HCT238D-Q100	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HCT238D	74HCT238D-Q100J ( 9353 000 68118 )
74HCT238PW-Q100	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HCT238	74HCT238PW-Q100J ( 9353 000 69118 )

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC238BQ-Q100	74HC238BQ-Q100X	74HC238BQ-Q100	Always Pb-free
74HC238D-Q100	74HC238D-Q100J	74HC238D-Q100	Always Pb-free
74HC238PW-Q100	74HC238PW-Q100J	74HC238PW-Q100	Always Pb-free
74HCT238BQ-Q100	74HCT238BQ-Q100X	74HCT238BQ-Q100	Always Pb-free
74HCT238D-Q100	74HCT238D-Q100J	74HCT238D-Q100	Always Pb-free
74HCT238PW-Q100	74HCT238PW-Q100J	74HCT238PW-Q100	Always Pb-free

Quality and reliability disclaimer

Documentation (10)

File name	Title	Type	Date
74HC_HCT238_Q100	3-to-8 line decoder/demultiplexer	Data sheet	2024-03-21
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SOT763-1	plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm body	Package information	2023-05-11
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08
SOT109-1	plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body	Package information	2023-11-07
SOT403-1	plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body	Package information	2023-11-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08

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