STM32L151RB-A datasheet(86/129 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L151x6/8/B-A STM32L152x6/8/B-A

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DocID024330 Rev 4

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 19 and

Table 45, respectively.

Unless otherwise specified, the parameters given in Table 45 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14.

Table 45. 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

-8

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

configuration register.

2. Guaranteed by design.

3. The maximum frequency is defined in Figure 19.

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