STR730FZ1T7 datasheet(42/53 Pages) STMICROELECTRONICS

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Electrical parameters

STR73xF

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NRSTIN Pin

NRSTIN Pin Input Driver is CMOS. A permanent pull-up is present which is the same as

RPU (see : General Characteristics on page 39)

Subject to general operating conditions for VDD and TA unless otherwise specified.

Notes:

Data based on characterization results, not tested in production.

Hysteresis voltage between Schmitt trigger switching levels.

Data guaranteed by design, not tested in production.

Figure 19. Recommended NRSTIN pin

protection1)

Notes:

The RPU pull-up equivalent resistor is based on a resistive transistor.

The reset network protects the device against parasitic resets.

The user must ensure that the level on the NRSTIN pin can go below the VIL(NRSTIN) max. level specified in

Table 23. Otherwise the reset will not be taken into account internally.

Table 23.

Reset pin characteristics

Symbol

Parameter

Conditions

Min

Typ 1)

Max

Unit

VIL(NRSTIN)

RSTIN Input low level voltage 1)

0.3 VDD

VIH(NRSTIN) RSTIN Input high level voltage 1)

0.7 VDD

Vhys(NRSTIN)

RSTIN Schmitt trigger voltage

hysteresis 2)

800

VF(RSTINn)

RSTIN Input filtered pulse3)

500

VNF(RSTINn) RSTIN Input not filtered pulse3)

2µs

VRP(RSTINn) RSTIN removal after Power-up3)

100

µs

0.01

µF

EXTERNAL

RESET

CIRCUIT

Required

STR7X

Filter

RPU

VDD

INTERNAL RESET

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