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RL78/L12

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Product Longevity: 2036

Compact LCD Microcontrollers with Low Power Consumption, Suitable for Small Appliances and Healthcare Devices

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Features

  • CPU: RL78 core, Max. 24MHz
  • Voltage: 1.6V to 5.5V
  • Package: 64-pin QFN, 32 to 64-pin QFP
  • Memory: SRAM Max. 1.5KB, Program Flash Max. 32KB
Find Other Products in RL78 Low-Power 8 & 16-Bit MCUs
RL78/L12 Block Diagram

Description

RL78/L12 microcontrollers have a built-in segment LCD driver. Three LCD driving voltage generation methods (external resistance division, capacitive split, and internal voltage boost) are supported, corresponding to a variety of segment LCD panels. They realize low current consumptionNote 1: external resistance division: 1.60 μANote 2, internal voltage boost: 1.19 μA, and capacitive split: 0.68 µA. With a lineup of 32 to 64-pin products supporting up to 280 segments, these microcontrollers are perfect for small devices with built-in LCD panels such as small appliances and healthcare devices.

Note 1: Current (typ.) at 1/3 bias, subclock operation, HALT mode, and RTC operation.

Note 2: Resistance value for external resistance division = 1000 kΩ.

Parameters

AttributesValue
Program Memory (KB)8, 16, 32
Data Flash (KB)2
RAM (KB)1, 1.5
Carrier TypeFull Carton (Tray), Full Tray (Tray), Tape & Reel
Supply Voltage (V)1.6 - 5.5
I/O Ports20, 29, 33, 37, 47
Temp. Range (°C)Ta = -40 to +85, Ta = -40 to +105
Operating Freq (Max) (MHz)24
USB FS (host ch/device ch)( 0 / 0 )
SCI or UART (ch)1
SPI (ch)2
I2C (#)1
CAN (ch)0
CAN-FD (ch)0
WirelessNo
LIN (#)1
16-Bit Timer (ch) (#)8
12-Bit A/D Converter (ch)0
10-Bit A/D Converter (ch)4, 7, 9, 10
24-Bit Sigma-Delta A/D Converter (ch)0
12-Bit D/A Converter (ch)0
10-Bit D/A Converter (ch) (#)0
8-Bit D/A Converter (ch)0
Capacitive Touch Sensing Unit (ch)0
Segment LCD ControllerYes
Security & EncryptionNo

Package Options

Pkg. TypePkg. Dimensions (mm)Lead Count (#)Pitch (mm)
HWQFN8 x 8 x 0.8640.4
LFQFP7 x 7 x 1.7480.5
LFQFP10 x 10 x 1.7640.5
LQFP7 x 7 x 1.7320.8
LQFP10 x 10 x 1.6440.8
LQFP10 x 10 x 1.7440.8
LQFP10 x 10 x 1.7520.65
LQFP10 x 10 x 1.6520.65
LQFP12 x 12 x 1.6640.65
LQFP12 x 12 x 1.7640.65

Application Block Diagrams

Programmable Radiator Thermostat Block Diagram
Programmable Radiator Thermostat
Programmable radiator thermostat enables zonal control, saves energy, ensures comfort, and supports expansion.

Additional Applications

  • Healthcare
  • Home Appliance
  • Office
  • Security

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The easy-to-build RL78 Quick Solutions feature Renesas' ultra-low power RL78 MCUs and analog devices. These solutions showcase device combinations that improve design performance and power efficiency to support your product development.

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