MAX6443US23L datasheet(9/13 Pages) MAXIM

Part #	MAX6443US23L

Description	uP Reset Circuits with Long Manual Reset Setup Period

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Manufacturer	MAXIM [Maxim Integrated Products]

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The area below the curves of the graph is the region in

which these devices typically do not generate a reset

pulse. This graph was generated using a falling pulse

applied to VCC, starting above the actual reset thresh-

old (VTH) and ending below it by the magnitude indicat-

ed (reset threshold overdrive). As the magnitude of the

transient increases (VCC goes further below the reset

threshold), the maximum allowable pulse width

decreases. Typically, a VCC transient that goes 100mV

below the reset threshold and lasts 20µs or less does

not cause a reset pulse to be asserted.

µP Reset Circuits with Long Manual Reset

Setup Period

_______________________________________________________________________________________

9

MAX6443

MAX6445

MAX6447

MAX6449

MAX6451

RESET

VCC

GND

100k

Ω

Figure 9. Ensuring RESET Valid to VCC = 0V

PART NO. SUFFIX

( _ _ )

VCC NOMINAL

VOLTAGE

THRESHOLD (V)

46

4.625

44

4.375

31

3.075

29

2.925

26

2.625

23

2.313

22

2.188

17

1.665

16

1.575

Table 1. Reset Voltage Threshold

PART NO. SUFFIX

( _ )

MANUAL RESET SETUP

PERIOD (s)

K

10.08

L

6.72

S

3.36

T

1.68

Table 2. Manual Reset Setup Period (tMR)

PART

TOP

MARK

PART

TOP

MARK

MAX6443US16L

KAFW

MAX6448UK16L

AEER

MAX6443US23L

KAFX

MAX6448UK23L

AEES

MAX6443US26L

KAFY

MAX6448UK26L

AEET

MAX6443US29L

KAFK

MAX6448UK29L

AEEU

MAX6443US46L

KAFZ

MAX6448UK46L

AEEV

MAX6444US16L

KAGA

MAX6449UT16L

ABEL

MAX6444US23L

KAGB

MAX6449UT23L

ABNP

MAX6444US26L

KAGC

MAX6449UT26L

ABNQ

MAX6444US29L

KAGD

MAX6449UT29L

ABNR

MAX6444US46L

KAFL

MAX6449UT46L

ABNS

MAX6445UK16L

AEEF

MAX6450UT16L

ABEM

MAX6445UK23L

AEEG

MAX6450UT23L

ABNX

MAX6445UK26L

AEEH

MAX6450UT26L

ABNY

MAX6445UK29L

AEEI

MAX6450UT29L

ABNZ

MAX6445UK46L

AEAO

MAX6450UT46L

ABOA

MAX6446UK16L

AEEN

MAX6451UT16L

ABNT

MAX6446UK23L

AEEO

MAX6451UT23L

ABEN

MAX6446UK26L

AEEP

MAX6451UT26L

ABNU

MAX6446UK29L

AEAP

MAX6451UT29L

ABNV

MAX6446UK46L

AEEQ

MAX6451UT46L

ABNW

MAX6447UK16L

AEEJ

MAX6452UT16L

ABOB

MAX6447UK23L

AEEK

MAX6452UT23L

ABOC

MAX6447UK26L

AEAQ

MAX6452UT26L

ABOD

MAX6447UK29L

AEEL

MAX6452UT29L

ABOE

MAX6447UK46L

AEEM

MAX6452UT46L

ABOF

Table 3. Standard Versions Table

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