MAX6309 데이터 시트보기 (PDF) - Maxim Integrated

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MAX6309

5-Pin, Multiple-Input, Programmable Reset ICs

Maxim Integrated 

5-Pin, Multiple-Input,

Programmable Reset ICs

currents, holding RESET low (Figure 4). The pull-down

resistor’s value is not critical; 100kΩ is large enough not

to load RESET and small enough to pull RESET to

ground. For applications where RESET must be valid to

VCC, a 100kΩ pull-up resistor between RESET and VCC

will hold RESET high when VCC falls below 1V (Figure 5).

Since the MAX6305/MAX6306/MAX6307 have open-

drain, active-low outputs, they typically use a pull-up

resistor. With these devices and under these conditions

(VCC < 1V), RESET will most likely not maintain an

active condition, but will drift toward a nonactive level

due to the pull-up resistor and the RESET output’s

reduction in sinking capability. These devices are not

recommended for applications that require a valid

RESET output below 1V.

VCC

MAX6308

MAX6309

MAX6310

VCC

GND

RESET

100k

Figure 4. Ensuring RESET Valid to VCC = 0V

VCC

MAX6311

MAX6312

MAX6313

100k

VCC

GND

RESET

Table 1. Factory-Trimmed Reset

Thresholds*

SUFFIX

TA = +25°C

MIN TYP MAX

TA = 0°C to +70°C

MIN

MAX

UK00

Preprogrammed Threshold

Not Available

Preprogrammed

Threshold Not

Available

UK50

UK49

UK48

UK47

UK46

UK45

UK44

UK43

UK42

UK41

UK40

UK39

UK38

UK37

UK36

UK35

UK34

UK33

UK32

UK31

UK30

UK29

UK28

UK27

UK26

UK25

4.925

4.827

4.728

4.630

4.561

4.433

4.314

4.236

4.137

4.039

3.940

3.842

3.743

3.645

3.546

3.448

3.349

3.251

3.152

3.034

2.955

2.886

2.758

2.660

2.591

2.463

5.000

4.900

4.800

4.700

4.630

4.500

4.380

4.300

4.200

4.100

4.000

3.900

3.800

3.700

3.600

3.500

3.400

3.300

3.200

3.080

3.000

2.930

2.800

2.700

2.630

2.500

5.075

4.974

4.872

4.771

4.699

4.568

4.446

4.365

4.263

4.162

4.060

3.959

3.857

3.756

3.654

3.553

3.451

3.350

3.248

3.126

3.045

2.974

2.842

2.741

2.669

2.538

4.875

4.778

4.680

4.583

4.514

4.388

4.270

4.193

4.095

3.998

3.900

3.803

3.705

3.608

3.510

3.413

3.315

3.218

3.120

3.003

2.925

2.857

2.730

2.633

2.564

2.438

5.125

5.023

4.920

4.818

4.746

4.613

4.490

4.408

4.305

4.203

4.100

3.998

3.895

3.793

3.690

3.588

3.485

3.383

3.280

3.157

3.075

3.000

2.870

2.768

2.696

2.563

* Factory-trimmed reset thresholds are available in approximately

100mV increments with a ±1.5% room-temperature variance.

Figure 5. Ensuring RESET Valid to VCC = 0V

8 _______________________________________________________________________________________

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