embedded-processors-controllers

EFM8BB51F16G

Full part number: EFM8BB51F16G-C-QFN20

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This Silicon Labs datasheet covers the EFM8BB51 Busy Bee family of 8-bit microcontrollers, listing multiple part numbers with varying flash sizes. The document serves as a comprehensive guide for engineers designing space-constrained embedded systems requiring high-value integration of analog and communication peripherals. Key specifications include a pipelined CIP-51 core operating up to 50 MHz, 16 multifunction I/O pins capable of 5V bias, a 12-bit ADC, three-channel PWM engine, four 16-bit timers, and two UART interfaces. It also features an internal LDO regulator supporting a wide 1.8V to 5.5V supply range, along with low-power modes consuming as little as 10 µA in snooze mode.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
quiescent current — 250 µA 315 µA Full speed, 612.5 kspm, 12-bit conversions
output voltage 1.18 V 1.2 V 1.22 V 1.2 V setting, full temperature range, VVDD≥ 1.8 V
output current — — 14.1 mA
supply voltage range 1.8 V — 5.5 V
input offset voltage -10 mV 1.7 mV 10 mV CPMD = 0, 25 °C; mV
cmrr — 69 dB — dB
operating temperature -40 °C — 85 °C
clock frequency 0 Hz — 50 MHz Clock provided at EXTCLK pin
propagation delay — 3.6 ns 6.3 ns Single CLU, internal connections
operating frequency 0 Hz — 70 kHz
psrr — 73 dB — At 1 kHz
cpu speed — 50 MHz —
program memory size — 16 kB —
ram size — 1.28 kB —
io count — 16 —
adc resolution — 12 bit —
core size — 8 bit —
data retention 10 year — — TA≤ 125 °C; years
output voltage low — — 600 mV High drive, IOL = 10 mA, VDD≥ 3.0 V
03 — Alternatives

Closest matches to EFM8BB51F16G

EFM8BB21F16A-C-QFN20 7.1× higher output current, 1.9× higher operating temperature, 1.8× higher ram size
EFM8BB21F16G 7.1× higher output current, 2.8× higher output voltage, 1.8× higher ram size
CH32V003F4U6 4.0× higher core size, 2.0× higher clock frequency, 1.6× higher ram size
EFM8BB10F2A-A-QFN20 17.8× higher quiescent current, 10.0× higher operating frequency, 8.0× lower program memory size
MSPM0G3505SDGS28 12.5× higher ram size, 8.9× higher propagation delay, 8.5× lower input offset voltage
MSP430FR2310 10.4× lower quiescent current, 10.0× higher data retention, 7.8× lower program memory size
PIC16LF1824 6.2× lower cpu speed, 5.0× lower ram size, 4.4× higher input offset voltage
STM32F030C4K6 4.0× higher core size, 3.2× higher ram size, 2.0× higher data retention
04 — FAQ

Frequently asked questions

What is the ADC resolution?

The ADC resolution is 12 bit.

What is the maximum clock frequency when the clock is provided at the EXTCLK pin?

The maximum clock frequency is 50 MHz when the clock is provided at the EXTCLK pin.

What is the common-mode rejection ratio (CMRR) of the EFM8BB51F16G-C-QFN20?

The common-mode rejection ratio (CMRR) is 69 dB.

What is the core size of the EFM8BB51F16G-C-QFN20?

The core size is 8 bit.

What is the maximum CPU speed for the EFM8BB51F16G-C-QFN20?

The maximum CPU speed is 50 MHz.

What is the data retention time when TA≤ 125 °C?

The data retention is 10 year.

What is the input offset voltage when CPMD = 0 at 25 °C?

The input offset voltage is 1.7 mV.

What is the I/O count for the EFM8BB51F16G-C-QFN20?

The I/O count is 16.

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