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16×2 LCD (I2C backpack)SSD1306 OLED 128×64 (I2C)

Structured comparison

Conditions and source links stay attached to each value. No automatic winner is declared.

Comparison of 16×2 LCD (I2C backpack), SSD1306 OLED 128×64 (I2C)
Attribute	16×2 LCD (I2C backpack)LCD1602 + PCF8574	SSD1306 OLED 128×64 (I2C)SSD1306
Overview
Manufacturer	Generic (HD44780-compatible glass + PCF8574 backpack)	Solomon Systech
Category	LCD	OLED
Object type	module	module
Package	Module	Breakout Board
Documented pins	4	4
Interfaces	I2C	I2C
Lifecycle	Unknown	ACTIVE
Physical pin mapping	Unknown	Unknown
Browser simulation	Available	Available
Electrical
Technology	lcdSource	oledSource
Controller	HD44780-compatible LCD controller, driven via a PCF8574 I2C backpackSource	SSD1306Source
Backlight	YesSource Most of the current draw is the backlight LED, not the LCD logic.	NoSource OLED pixels are self-emissive; there's no backlight to control.
Operating Voltage	Varies by vendor The PCF8574 IC supports 2.5–6V, but a complete LCD/backpack module's LCD bias, backlight and pull-up wiring are vendor-specific. Many are sold as 5V modules.	Varies by vendor This record describes a generic breakout. Regulator and level-shifting arrangements differ; the SSD1306 controller IC datasheet does not establish the module header's safe supply range.
Interface
Interface	i2cSource	i2cSource SPI variants of SSD1306 boards exist but this record models the common I2C-only 4-pin module.
Performance
Resolution (X)	Not applicable	128Source
Resolution (Y)	Not applicable	64Source
Colors	monoSource	monoSource
Physical
Diagonal	Unknown	Varies by vendor 0.96-inch panels are common, but SSD1306 is a controller family and the controller datasheet does not identify this generic breakout's panel size.
Package	Module	Breakout Board
Length	80 mmSource Standard 16×2 character LCD PCB size.	Varies by vendor 0.96" 4-pin boards are commonly around 27×27mm, but the PCB outline isn't standardized across manufacturers.
Width	36 mmSource	Unknown
Mounting	module	module

Overview

Manufacturer

16×2 LCD (I2C backpack): Generic (HD44780-compatible glass + PCF8574 backpack)
SSD1306 OLED 128×64 (I2C): Solomon Systech

Object type

16×2 LCD (I2C backpack): module
SSD1306 OLED 128×64 (I2C): module

Package

16×2 LCD (I2C backpack): Module
SSD1306 OLED 128×64 (I2C): Breakout Board

Documented pins

16×2 LCD (I2C backpack): 4
SSD1306 OLED 128×64 (I2C): 4

Interfaces

16×2 LCD (I2C backpack): I2C
SSD1306 OLED 128×64 (I2C): I2C

Lifecycle

16×2 LCD (I2C backpack): Unknown
SSD1306 OLED 128×64 (I2C): ACTIVE

Physical pin mapping

16×2 LCD (I2C backpack): Unknown
SSD1306 OLED 128×64 (I2C): Unknown

Browser simulation

16×2 LCD (I2C backpack): Available
SSD1306 OLED 128×64 (I2C): Available

Electrical

Technology

16×2 LCD (I2C backpack): lcdSource
SSD1306 OLED 128×64 (I2C): oledSource

Controller

16×2 LCD (I2C backpack): HD44780-compatible LCD controller, driven via a PCF8574 I2C backpackSource
SSD1306 OLED 128×64 (I2C): SSD1306Source

Backlight

16×2 LCD (I2C backpack): YesSource
Most of the current draw is the backlight LED, not the LCD logic.
SSD1306 OLED 128×64 (I2C): NoSource
OLED pixels are self-emissive; there's no backlight to control.

Operating Voltage

16×2 LCD (I2C backpack): Varies by vendor
The PCF8574 IC supports 2.5–6V, but a complete LCD/backpack module's LCD bias, backlight and pull-up wiring are vendor-specific. Many are sold as 5V modules.
SSD1306 OLED 128×64 (I2C): Varies by vendor
This record describes a generic breakout. Regulator and level-shifting arrangements differ; the SSD1306 controller IC datasheet does not establish the module header's safe supply range.

Interface

16×2 LCD (I2C backpack): i2cSource
SSD1306 OLED 128×64 (I2C): i2cSource
SPI variants of SSD1306 boards exist but this record models the common I2C-only 4-pin module.

Performance

Resolution (X)

16×2 LCD (I2C backpack): Not applicable
SSD1306 OLED 128×64 (I2C): 128Source

Resolution (Y)

16×2 LCD (I2C backpack): Not applicable
SSD1306 OLED 128×64 (I2C): 64Source

Colors

16×2 LCD (I2C backpack): monoSource
SSD1306 OLED 128×64 (I2C): monoSource

Physical

Diagonal

16×2 LCD (I2C backpack): Unknown
SSD1306 OLED 128×64 (I2C): Varies by vendor
0.96-inch panels are common, but SSD1306 is a controller family and the controller datasheet does not identify this generic breakout's panel size.

Package

16×2 LCD (I2C backpack): Module
SSD1306 OLED 128×64 (I2C): Breakout Board

Length

16×2 LCD (I2C backpack): 80 mmSource
Standard 16×2 character LCD PCB size.
SSD1306 OLED 128×64 (I2C): Varies by vendor
0.96" 4-pin boards are commonly around 27×27mm, but the PCB outline isn't standardized across manufacturers.

Width

16×2 LCD (I2C backpack): 36 mmSource
SSD1306 OLED 128×64 (I2C): Unknown

Mounting

16×2 LCD (I2C backpack): module
SSD1306 OLED 128×64 (I2C): module

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Compare electronics parts

Choose 2–4 parts

Structured comparison

Overview

Manufacturer

Category

Object type

Package

Documented pins

Interfaces

Lifecycle

Physical pin mapping

Browser simulation

Electrical

Technology

Controller

Backlight

Operating Voltage

Interface

Interface

Performance

Resolution (X)

Resolution (Y)

Colors

Physical

Diagonal

Package

Length

Width

Mounting