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MC33064LP Fiches technique(PDF) 10 Page - Microsemi Corporation

No de pièce MC33064LP
Description  UNDERVOLTAGE SENSING CIRCUIT
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Fabricant  MICROSEMI [Microsemi Corporation]
Site Internet  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

MC33064LP Fiches technique(HTML) 10 Page - Microsemi Corporation

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TRANSIENT IMMUNE UNDERVOLTAGE SENSING CIRCUIT
MC33064/MC34064
PRODUCT DA T ABOOK 1996/1997
Copyright © 1999
Rev. 1.3
6/99
10
P RODUCTION
D AT A
S HEET
TYPICAL APPLICA TION CIRCUITS
(Cont'd.)
FIGURE 19. — LOW VOLTAGE MICROPROCESSOR RESET
with ADDITIONAL HYSTERESIS
Comparator hysteresis can be increased with the addition of resistor R
H.
The
hysteresis equation has been simplified and does not account for the change of
input current I
IN as VCC crosses the comparator threshold.
An increase of the
lower threshold
∆V
TH (LOWER) will be observed due to IIN which is typically 340µA at
4.59V. The equations are accurate to ±10% with R
H less than 150Ω and RL
between 1.5k
Ω and 10kΩ.
V
H =
+ 0.02
∆V
TH (LOWER) = 340 RH x 10
-6
Where: R
H ≤ 150Ω
R
L ≥ 1.5Ω ≤ 10kΩ
4.6 R
H
R
L
TEST DATA
V
H
∆V
TH
R
H
R
L
(mV) (mV)
(
Ω)(Ω)
20
000
51
3.4101.5
40
6.8204.7
81
6.8201.5
71
10
30
2.7
112
10
30
1.5
100
16
47
2.7
164
16
47
1.5
190
34
100
2.7
327
34
100
1.5
276
51
150
2.7
480
51
150
1.5
FIGURE 20. — SOLAR POWERED BATTERY CHARGER
1.2 V
REF
MICROPROCESSOR
CIRCUIT
RESET
V
IN
POWER
SUPPLY
R
L
R
H
I
IN
1.2 V
REF
RESET
V
IN
SOLAR
CELLS
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.


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