122x32 graphic lcd — 122 x 32 dot graphic LCD modules built in both COB and COG construction. The COG version runs an ST7567 controller over SPI with an internal charge pump, so it needs no external contrast supply; the COB version uses an SBN1661G-M18 on an 8-bit parallel bus.
Specifications
| Model | MLG12232Y-1B (COB), MLG12232J-1 (COG) |
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| Resolution | 122 x 32 dots |
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| Build | COB and COG versions |
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| Driver IC | ST7567 (MLG12232J-1 COG), SBN1661G-M18 (MLG12232Y-1B COB) |
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| Drive method | 1/32 duty, 1/7 bias |
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| Display mode | STN / FSTN / FFSTN optional |
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| Viewing direction | 6 o'clock |
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| Backlight | White, 3 LEDs (COG version) |
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| Operating temperature | -20 to +70 degree |
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| Storage temperature | -30 to +80 degree |
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Compare with nearby graphic LCD sizes
| Resolution | Driver IC | Build | Backlight |
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| 122 x 32 | ST7567 / SBN1661G-M18 | COB / COG | White LED |
| 128 x 32 | ST7567A / KS0108 | COB / COG | White LED |
FAQ
Is there an Arduino or MCU library for the 122x32?
The COG version uses an ST7567 controller, which is supported by the u8g2 and u8glib graphics libraries on Arduino, ESP32 and STM32. The COB version uses an SBN1661G-M18, which follows the KS0108 family command set.
Does the 122x32 need a negative contrast voltage?
The COG ST7567 build does not. It generates the LCD bias internally and contrast is set by a software command, so no external negative rail or trimmer is needed. The COB build follows the usual KS0108 practice of an external contrast divider on VO.
How much memory does the 122x32 frame buffer take?
122 x 32 dots at 1 bit per dot is 488 bytes of display RAM, which fits in the internal RAM of most small microcontrollers.
Can the 122x32 run without a backlight?
Yes, on a transflective or reflective polariser. Transflective keeps the white LED fitted but stays legible with the backlight off in daylight; a reflective build has no backlight at all.
