51.23 UART Electrical Specifications

Table 51-33. UART AC Electrical Specifications
AC CHARACTERISTICS Standard Operating Conditions: VDDREG=VDDIO=AVDD 1.71V to 3.63V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial
Param. No. Symbol Characteristics Min. Typ. Max. Units Conditions
UT_1A FBRATE Baud Rate - Normal Speed SERCOM Asynchronous SAMPR = 16x mode — — 6.25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 6.25 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_3A Asynchronous SAMPR = 8x mode — — 12.5 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 12.5 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_5A Asynchronous SAMPR = 3x mode — — 15 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 15 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_19A Synchronous Mode X2 mode — — 25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 24 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_21A Synchronous Mode X1 mode — — 25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 24 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_1B FBRATE_HS Baud Rate - High Speed SERCOM Asynchronous SAMPR = 16x mode — — 10 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 10 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_3B Asynchronous SAMPR = 8x mode — — 20 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 20 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_5B Asynchronous SAMPR = 3x mode — — 25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 25 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_19B Synchronous Mode X2 mode — — 25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 24 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_21B Synchronous Mode X1 mode — — 25 Mbps VDDIO = 3.3V,

CLOAD = 30 pF(MAX)
— — 24 Mbps VDDIO = 1.8V,

CLOAD = 30 pF(MAX)
UT_23 FUSART USART max GCLK_SERCOM — — FCLK_23 MHz —
UT_25 FXCK USART External Clock Input — — 25 MHz —