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74AHC(T)138: 3-to-8 line decoder/demultiplexer; inverting (Based on PIP 74AHC_AHCT138)

The 74AHC138; 74AHCT138 are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard No. 7A.

The 74AHC138; 74AHCT138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected.

There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.

This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74AHC138; 74AHCT138 devices and one inverter. The 74AHC138; 74AHCT138 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. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.

74AHC_T_138: Product Block Diagram

Outline 3d SOT403-1

Data Sheets (1)

Application Notes (5)

Brochures (2)

Selector Guides (2)

Package Information (3)

Packing (3)

Supporting Information (3)

IBIS Model

• ahc138 IBIS model (REV 1.0) ibs AHC138 4/7/2013
• ahct138 IBIS model (REV 1.0) ibs AHCT138 4/7/2013

Ordering Information

Package Information

Product ID	Package Description	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	RoHS / Pb Free / RHF	LeadFree Conversion Date	EFR	IFR(FIT)	MTBF(hour)	MSL	MSL LF
74AHC138BQ		SOT763-1		Reel 7" Q1/T1	Active	74AHC138BQ,115 (9352 855 72115)	AHC138	74AHC138BQ		Always Pb-free	84.9	6.62	1.51E8	1	1
74AHCT138D		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	74AHCT138D,118 (9352 629 97118)	74AHCT138D	74AHCT138D		week 35, 2004	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74AHCT138D,112 (9352 629 97112)	74AHCT138D	74AHCT138D		week 35, 2004	84.9	6.62	1.51E8	1	1
74AHCT138PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74AHCT138PW,118 (9352 629 98118)	AHCT138	74AHCT138PW		week 10, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74AHCT138PW,112 (9352 629 98112)	AHCT138	74AHCT138PW		week 10, 2005	84.9	6.62	1.51E8	1	1
74AHC138PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	74AHC138PW,118 (9352 630 00118)	AHC138	74AHC138PW		week 10, 2005	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74AHC138PW,112 (9352 630 00112)	AHC138	74AHC138PW		week 10, 2005	84.9	6.62	1.51E8	1	1
74AHC138D		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	74AHC138D,118 (9352 629 99118)	74AHC138D	74AHC138D		week 35, 2004	84.9	6.62	1.51E8	1	1
				Bulk Pack	Active	74AHC138D,112 (9352 629 99112)	74AHC138D	74AHC138D		week 35, 2004	84.9	6.62	1.51E8	1	1
74AHCT138BQ		SOT763-1		Reel 7" Q1/T1	Active	74AHCT138BQ,115 (9352 855 73115)	AHT138	74AHCT138BQ		Always Pb-free	84.9	6.62	1.51E8	1	1