lx6433 Microsemi Corporation, lx6433 Datasheet - Page 3

• Manufacturer Part Number: lx6433
• Description: Precision Voltage Monitor
• Manufacturer: Microsemi Corporation

Copyright © 2003
Rev. 1.1, 2009-02-11
TM
5V
1V
0V
T0: RESET invalid logic state for VIN < 2V
T1- T1 Vmonitor exceeds Threshold, at T1, RESET pulse remains low for 100ms until T2.
T3 - T4: Transient on VIN is ignored, less than 10usec duration for Vmonitor < THRESHOLD. (Same applies for *)
T5: Vmonitor drops below Threshold, remains low for > 10usec which activates RESET Low.
T6: Vmonitor rises above Threshold but previous fault at T5 has not cycled through full timeout (T 6-T7 < 50mS), RESET remains low.
T7: Vmonitor fals below Threshold, RESET remains low.
T8-T9: Duration exceeds 150ms, RESET timer cycle completed, output rises
T10-T11: Vmonitor falls below Threshold for > 10uS, RESET signal goes low.
T13-T14, T15-T16 :Vmonitor is above Threshold, no limits apply for peak voltage or duration.
1.5V
1.0V
0.5V
0.0V
T7-T8 duration > 10uS, RESET timer restarted for 100mS timeout
VMON
5V
3V
0V
“THRESHOLD”
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
GND
T0
REF
+
-
T1
100ms
(typ.)
S I M P L I F I E D B L O C K D I A G R A M
CLOCK
1.6MHz
T2
T3
Negative Edge Detector
Figure 2 – Simplified Block Diagram
T4
Analog Mixed Signal Group
Figure 3 – Timing Diagram
®
Microsemi
T5 T6 T7
Pulse Qualifier
Divide by
OUTPUT
SET
VIN
100ms
(typ.)
2
RESET
T8
4
T9 T10 T11 T12
Precision Voltage Monitor
P
RODUCTION
100ms
(typ.)
**
Clock
* * *
* * *
T13
D
T14
ATA
T15
RESET Output
Divide by
T16
S
2
17
HEET
VIN
VMON
RESET
LX6433
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