MAX7389srff datasheet(3/11 Pages) MAXIM

3 / 11 page

Microcontroller Clock Generator with

Watchdog

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, VCC = +2.7V to +5.5V, TA = -40°C to +125°C, 1MHz to 16MHz output frequency range, typical values at

VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CLOCK Duty Cycle

(Note 2)

CLOCK Output Jitter

Observation for 20s using a 500MHz

oscilloscope

310

RMS

Output Rise Time

CLOAD = 10pF, 10% to 90% of full scale (Note 2)

2.5

7.0

Output Fall Time

CLOAD = 10pF, 90% to 10% of full scale (Note 2)

2.8

7.5

INTERNAL POWER-ON RESET

TA = +25°C

VTH

- 1.5%

VTH

+ 1.5%

Reset Voltage

VTH+

VCC rising, Table 2

TA = -40°C to +125°C

VTH

- 2.5%

VTH

+ 2.5%

VTH-

VCC falling

0.98 x

VTH+

Reset Timeout Period

tRST

Figures 1, 2

135

250

µs

WATCHDOG

WDS1 = GND, WDS2 = GND

WDS1 = open, WDS2 = GND

WDS1 = VCC, WDS2 = GND

WDS1 = GND, WDS2 = open

128

177

WDS1 = open, WDS2 = open

177

256

354

WDS1 = VCC, WDS2 = open

354

512

708

WDS1 = GND, WDS2 = VCC

708

1024

1416

Watchdog Timeout Period

(Figure 2)

WDS1 = open, WDS2 = VCC

1416

2048

2832

tWDG

WDS1 = WDS2 = VCC (watchdog disabled)

POWER FAIL

Power-Fail Select Threshold

VSEL

PFI input

0.65 x

VCC

0.85 x

VCC

VCC Monitoring Threshold

(Internal Threshold)

VITH

VCC rising

4.06

4.38

4.60

Internal Threshold Hysteresis

VIHYST

VCC falling

1.0

4.0

%VITH

PFI Monitoring Threshold

(External Threshold)

VETH

PFI rising

0.9

1.1

1.4

External Threshold Hysteresis

VEHYST

PFI falling

1.0

3.5

8.0

%VETH

Note 1: All parameters are tested at TA = +25°C. Specifications over temperature are guaranteed by design.

Note 2: Guaranteed by design. Not production tested.

MAX7389srff Datasheet(PDF) 3 Page - Maxim Integrated Products

MAX7389srff Datasheet(HTML) 3 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11

Datasheet Download

Link URL