STR730FZ1T7 datasheet(41/52 Pages) STMICROELECTRONICS

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STR73xFxx

Electrical parameters

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NRSTIN pin

The NRSTIN pin input driver is CMOS. A permanent pull-up is present which is the same as

RPU (see : General characteristics on page 38)

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

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)

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 25. Otherwise the reset will not be taken into account internally.

Table 25.

Reset pin characteristics

Symbol

Parameter

Conditions

Min

Typ 1)

Max

Unit

VIL(NRSTIN)

NRSTIN Input low level voltage 1)

0.3 VDD

VIH(NRSTIN) NRSTIN Input high level voltage 1)

0.7 VDD

Vhys(NRSTIN)

NRSTIN Schmitt trigger voltage

hysteresis 2)

800

VF(RSTINn)

NRSTIN Input filtered pulse3)

500

VNF(RSTINn) NRSTIN Input not filtered pulse3)

2µs

VRP(RSTINn) NRSTIN removal after Power-up3)

100

µs

0.01

μF

EXTERNAL

RESET

CIRCUIT

Required

STR7X

Filter

RPU

VDD

INTERNAL RESET

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