STM6321 datasheet(23/31 Pages) STMICROELECTRONICS

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STM632x, STM682x

DC and AC parameters

Reset threshold

temperature coefficient

ppm/

Push-button reset input

tMLMH

tMR

MR pulse width

µs

tMLRL

tMRD

MR to RST output delay

500

MR glitch immunity

100

MR pull-up resistor

Watchdog timer

tWD (6)

Watchdog timeout period

1.12

1.60

2.24

WDI pulse width(7)

VCC ≥ 3.0 V

1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 4.5 to 5.5 V for “L/M” versions; VCC = 2.7 to 3.6 V for

“T/S/R” versions; and VCC = 1.2 to 2.75 V for “Z/Y” version (except where noted).

2. VCC (min.) = 1.0 V for TA = 0 to +85 °C.

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. Other trec offered for tWD (102 ms, 6.3 ms, and 25.6 s options). Minimum order quantities may apply. Contact local sales

office for availability.

For VCC < 3.0 V, tWD(min.) = 100 ns.

Table 6. DC and AC characteristics (continued)

Sym-

bol

Alter-

native

Description

Test condition(1)

Min.

Typ.

Max.

Unit

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