STM32L151VBT6DTR datasheet(81/121 Pages) STMICROELECTRONICS

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STM32L151x6/8/B, STM32L152x6/8/B

Electrical characteristics

Doc ID 17659 Rev 8

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Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 18 and

Table 44, respectively.

Unless otherwise specified, the parameters given in Table 44 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14.

Table 44.

I/O AC characteristics(1)

OSPEEDRx

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min

Max(2)

Unit

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

400

kHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

400

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

625

CL = 50 pF, VDD = 1.65 V to 2.7 V

625

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

125

CL = 50 pF, VDD = 1.65 V to 2.7 V

250

Fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

CL = 50 pF, VDD = 1.65 V to 2.7 V

125

Fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 30 pF, VDD = 2.7 V to 3.6 V

CL = 50 pF, VDD = 1.65 V to 2.7 V

-tEXTIpw

Pulse width of external

signals detected by the

EXTI controller

The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the STM32L15xxx reference manual for a description

of GPIO Port configuration register.

Guaranteed by design. Not tested in production.

The maximum frequency is defined in Figure 18.

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