MCM Electronics

20 X 4 LCD Display with Parallel Interface By Distributed By MCM (LCD_20_4_5V_X7) MCM Part #83-15158

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This is a basic 20 character by 4 line display. Black text on Green background. Utilizes the extremely common HD44780 parallel interface chipset (datasheet). Interface code is freely available. You will need ~11 general I/O pins to interface to this LCD screen. Includes LED backlight.

Specifications Top

Works on either 4 bit or 8 bit mode. For Arduino LCD library, Please refer to

Connections to Arduino:

The circuit:

* LCD RS pin to digital pin 12

* LCD Enable pin to digital pin 11

* LCD D4 pin to digital pin 5

* LCD D5 pin to digital pin 4

* LCD D6 pin to digital pin 3

* LCD D7 pin to digital pin 2

Parallel LCDs run off of +5V so you can just solder the Vcc (pin 2 in LCD)wire to 5V and the ground (pin 1 in LCD) wire to GND.

* 10K resistor:

* ends to +5V and ground

* wiper to LCD VO pin (pin 3)

How to run Arduino examples:


Dimensions: 3.15" x 1.425"

Part Numbers
MCM Part #:83-15158
Distributed By MCM Part #:LCD_20_4_5V_X7
Package Specifications & Dimensions
Weight:0.025 lbs.
RoHS Comp:Yes
Warranty:180 days
Need to Return?
Length:6 in.
Width:3 in.
Height:1 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

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