MSP430F149 datasheet(31/59 Pages) TI

31 / 59 page

MSP430x13x, MSP430x14x, MSP430x14x1

MIXED SIGNAL MICROCONTROLLER

SLAS272F − JULY 2000 − REVISED JUNE 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature (unless otherwise

noted) (continued)

PUC/POR

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

t(POR_Delay)

Internal time delay to release POR

150

250

µs

VCC threshold at which POR

TA = −40°C

1.4

1.8

VPOR

VCC threshold at which POR

release delay time begins

(see Note 1)

TA = 25°C

1.1

1.5

VPOR

release delay time begins

(see Note 1)

TA = 85°C

VCC = 2.2 V/3 V

0.8

1.2

V(min)

VCC threshold required to

generate a POR (see Note 2)

VCC |dV/dt| ≥ 1V/ms

0.2

t(reset)

RST/NMI low time for PUC/POR

Reset is accepted internally

µs

NOTES:

1. VCC rise time dV/dt ≥ 1V/ms.

2. When driving VCC low in order to generate a POR condition, VCC should be driven to 200mV or lower with a dV/dt equal to or less

than −1V/ms. The corresponding rising VCC must also meet the dV/dt requirement equal to or greater than +1V/ms.

VCC

POR

(min)

POR

No POR

Figure 10. Power-On Reset (POR) vs Supply Voltage

1.2

1.5

1.8

0.8

1.2

1.4

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

−40

−20

°C

TA − Temperature − °C

Figure 11. VPOR vs Temperature

MSP430F149 Datasheet(PDF) 31 Page - Texas Instruments

MSP430F149 Datasheet(HTML) 31 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

Datasheet Download

Link URL