74LV138BQ PCB Symbol, Footprint & ECAD Model

3-to-8 line decoder/demultplexer; inverting

The 74LV138 is a low-voltage Si-gate CMOS device that is pin and function compatible with 74HC138 and 74HCT138.

The 74LV138 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 active LOW outputs (Y0 to Y7).

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 74LV138 devices and one inverter. The 74LV138 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.

3-to-8 line decoder/demultplexer; inverting

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Features and benefits

Wide operating voltage: 1.0 V to 5.5 V
Optimized for low voltage applications: 1.0 V to 3.6 V
Accepts TTL input levels between V_CC = 2.7 V and V_CC = 3.6 V
Typical output ground bounce < 0.8 V at V_CC = 3.3 V and T_amb = 25 °C
Typical HIGH-level output voltage (V_OH) undershoot: > 2 V at V_CC = 3.3 V and T_amb = 25 °C
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active LOW mutually exclusive outputs
ESD protection:
- HBM JESD22-A114E exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

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
74LV138BQ	Production	1.0 - 5.5	TTL	± 12	12	low	-40~125	83	6.5	50	DHVQFN16

Package

Type number	Orderable part number, (Ordering code (12NC))	Status	Marking	Package	Package information	Reflow-/Wave soldering	Packing
74LV138BQ	74LV138BQ,115 ( 9352 855 77115 )	Active	LV138	DHVQFN16 (SOT763-1)	SOT763-1		Reel 7” Q1/T1 or Q2/T3

Quality, reliability & chemical content

Type number	Orderable part number	Chemical content	RoHS / RHF	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74LV138BQ	74LV138BQ,115	74LV138BQ		144.9	10.23	9.78E7	1	1

Quality and reliability disclaimer

Series

74LV138 - 3-to-8 line decoder/demultplexer; inverting

Documentation (2)

File name	Title	Type	Date
74LV138	3-to-8 line decoder/demultplexer; inverting	Data sheet	2018-02-05
lv	lv Spice model	SPICE model	2013-05-06

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Models

File name	Title	Type	Date
lv	lv Spice model	SPICE model	2013-05-06

Ordering, pricing & availability

Type number	Orderable part number	Ordering code (12NC)	Packing	Buy online
74LV138BQ	74LV138BQ,115	935285577115	Reel 7” Q1/T1 or Q2/T3	Order product

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