embedded-processors-controllers

MSP430AFE221

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

01 — Overview

This TI datasheet covers the MSP430AFE2x3, 2x2, and 2x1 mixed-signal microcontrollers. Designed for portable measurement applications like electricity meters and sensors, these devices feature ultra-low power consumption with modes as low as 0.1 µA. Key parameters include a supply voltage range of 1.8V to 3.6V, up to three 24-bit sigma-delta ADCs with differential PGA inputs, a 16-bit Timer_A, and a hardware multiplier. The architecture supports fast wake-up in under 1 µs and includes an on-chip emulation module.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
quiescent current	—	12 µA	17 µA	VLD ≠ 0, VCC = 3 V
output voltage	—	1.2 V	—	SD24REFON = 1, SD24VMIDON = 1; 3 V
output current	—	—	200 nA	SD24REFON = 1, SD24VMIDON = 0; 3 V
supply voltage range	1 V	1.25 V	1.5 V	SD24REFON = 0; 3 V
operating temperature	-40 °C	—	85 °C
clock frequency	30 kHz	1 MHz	1.1 MHz	3 V
input capacitance	—	5 pF	—	VIN = VSSor VCC
cpu speed	—	12 MHz	—
program memory size	—	4 kB	—
ram size	—	256 B	—
io count	—	11	—
adc resolution	—	24 bit	—
core size	—	16 bit	—
operate time	15 µs	—	100 µs	3 V
data retention	100 year	—	—
program erase cycles	104 cycle	105 cycle	—
load capacitance	—	1 pF	—	XT2OFF = 0(3)

03 — Alternatives

Closest matches to MSP430AFE221

MSP430FR2310 16.0× higher clock frequency, 9.7× higher program erase cycles, 7.8× higher ram size

MSP430F155IPM 8.0× higher clock frequency, 4.1× higher program memory size, 2.4× higher input capacitance

MSP430G2553IPW28R 4.1× higher program memory size, 3.8× higher operating temperature, 3.4× higher clock frequency

MSP430FR2433IRGER 16.0× higher clock frequency, 16.0× higher ram size, 15.4× higher quiescent current

MSPM0G3505SDGS28 10.0× higher clock frequency, 8.0× higher program memory size, 6.7× higher cpu speed

STM32L010F4P6 16.0× higher clock frequency, 8.0× higher ram size, 4.1× higher program memory size

STM8L051F3P6 20.0× higher load capacitance, 8.0× higher clock frequency, 5.0× higher output current

EFM8BB10F2A-A-QFN20 12.5× higher clock frequency, 2.3× higher supply voltage range, 2.1× higher cpu speed

04 — FAQ

Frequently asked questions

What is the ADC resolution of the MSP430AFE221?

The ADC resolution is 24 bit.

What is the clock frequency at 3 V?

The clock frequency is 1 MHz at 3 V.

What is the core size of the MSP430AFE221?

The core size is 16 bit.

What is the maximum CPU speed of the MSP430AFE221?

The maximum CPU speed is 12 MHz.

What is the data retention time for the MSP430AFE221?

The data retention time is 100 year.

What is the input capacitance when VIN = VSSor VCC?

The input capacitance is 5 pF when VIN = VSSor VCC.

How many I/O pins does the MSP430AFE221 have?

The MSP430AFE221 has 11 I/O pins.

What is the load capacitance when XT2OFF = 0(3)?

The load capacitance is 1 pF when XT2OFF = 0(3).

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