DC and AC parameters

STM6321/6322STM6821/6822/6823/6824/6825

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Reset threshold

temperature coefficient

40

ppm/C

Push-button Reset Input

MR pulse width

1

µs

MR to RST output delay

500

ns

MR glitch immunity

100

ns

MR pull-up resistor

35

52

75

k

Ω

Watchdog Timer

(6)

Watchdog timeout period

1.12

1.60

2.24

s

50

ns

1.

2.

3.

WDI input is designed to be driven by a three-state output device. To float WDI, the “high-impedance mode” of the output

device must have a maximum leakage current of 10 µA and a maximum output capacitance of 200 pF. The output device

must also be able to source and sink at least 200 µA when active.

4.

WDI is internally serviced within the watchdog period if WDI is left unconnected.

5.

The leakage current measured on the RST pin is tested with the reset asserted (output high impedance).

6.

7.

Table 6.

DC and AC characteristic (continued)

Sym

Alter-

native

Description

Min

Typ

Max

Unit