Revision history
About this document
Block diagram
CPU
Memory
NVMC — Non-volatile memory controller
FICR — Factory information configuration registers
UICR — User information configuration registers
EasyDMA
AHB multilayer
Debug and trace
Power management unit (PMU)
Current consumption
POWER — Power supply
CLOCK — Clock control
Peripheral interface
AAR — Accelerated address resolver
ACL — Access control lists
CCM — AES CCM mode encryption
COMP — Comparator
ECB — AES electronic codebook mode encryption
EGU — Event generator unit
GPIO — General purpose input/output
GPIOTE — GPIO tasks and events
I2S — Inter-IC sound interface
LPCOMP — Low-power comparator
MWU — Memory watch unit
NFCT — Near field communication tag
PDM — Pulse density modulation interface
PPI — Programmable peripheral interconnect
PWM — Pulse width modulation
QDEC — Quadrature decoder
RADIO — 2.4 GHz radio
RNG — Random number generator
RTC — Real-time counter
SAADC — Successive approximation analog-to-digital converter
SPI — Serial peripheral interface master
SPIM — Serial peripheral interface master with EasyDMA
SPIS — Serial peripheral interface slave with EasyDMA
SWI — Software interrupts
TEMP — Temperature sensor
TWI — I2C compatible two-wire interface
TIMER — Timer/counter
TWIM — I2C compatible two-wire interface master with EasyDMA
TWIS — I2C compatible two-wire interface slave with EasyDMA
UART — Universal asynchronous receiver/transmitter
UARTE — Universal asynchronous receiver/transmitter with EasyDMA
USBD — Universal serial bus device
WDT — Watchdog timer
Pin assignments
Mechanical specifications
Reference circuitry
Package thermal characteristics
Package Variation
Recommended operating conditions
Absolute maximum ratings
Ordering information
Legal notices

Package thermal characteristics

A summary of the thermal characteristics for the different packages available for the IC can be found below.

Table 1. Package thermal characteristics
Symbol	Package	Typ.	Unit
θ_JA,aQFN73	aQFN73	74.60	°C/W
θ_JA,QFN40	QFN40	136.59	°C/W
θ_JA,WLCSP	WLCSP	93.09	°C/W

Values obtained by simulation following the EIA/JESD51-2 for still air condition.