BJT AND Gate (1 CH)

Category:

Digital Logic

Author:

Shane Oberloier

Post date:

November 27, 2017 - 3:16am

UPL Compliant:

Yes

Tested:

Rating:

No votes yet

Tags:

logic gate, BJT circuit

Design Description:

A very simple 2 input, single channel logical AND gate using 2N2222 transistors. Use with 5V logic, may work with higher or lower logic levels though. Please comment if you've managed to make it work with different levels. This design can be used as a reference for more complex multi-input logic gates.

Circuit Truth Table:

A	B	Out
GND (0)	GND (0)	GND (0)
GND (0)	5V (1)	GND (0)
5V (1)	GND (0)	GND (0)
5V (1)	5V (1)	5V (0)

Bill of Material


Component	Description	Part	References	Value	Footprint	Quantity Per PCB	Datasheet	UPL #	Part #
1	Header Male 5 [UPL 10.001]	MALE_01X05	P1	MALE_01X05	Pin_Header_Straight_1x05	1	https://www.digikey.com/short/qt5jbv	10.001	PRPC032SAAN-RC
2	Bipolar Transistor NPN 40V 0.6A MMBT2222 [UPL 4.019]	MMBT2222	Q1 Q2	MMBT2222	SOT-23	2	https://www.digikey.com/short/q75w2h	4.019	MMBT2222ALT1G
3	SMD 10K ohm resistor 1/4W [UPL 1.040]	10K	R1 R2	10K	R_1206_HandSoldering	2	https://www.digikey.com/short/qcz4tt	1.040	RC1206FR-0710KL
4	SMD 4K7 ohm resistor 1/4W [UPL 1.036]	4K7	R3	4K7	R_1206_HandSoldering	1	https://www.digikey.com/short/qcz47h	1.036	RC1206FR-074K7L
Component Groups:	4
Component Count:	6
Fitted Components:	6
Number of PCBs:	1
Total components:	6
Schematic Version:
Schematic Date:
BoM Date:	Sun 26 Nov 2017 10:05:16 PM EST
Schematic Source:	/home/shane/Documents/BJT_AND_Gate/BJT_AND_Gate.sch
KiCad Version:	Eeschema 4.0.2+dfsg1-stable

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Design Files

Design Files:

BJT_AND_Gate.zip

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BJT AND Gate (1 CH)

BJT AND Gate (1 CH)