MAX6730 Maxim, MAX6730 Datasheet - Page 8

• Manufacturer Part Number: MAX6730
• Description: Single-/Dual-/Triple-Voltage P Supervisory Circuits with Independent Watchdog Output
• Manufacturer: Maxim

Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Table 1. Reset Voltage Threshold Suffix Guide**
**Standard versions are shown in bold and are available in a
D3 timeout option only. Standard versions require 2500-piece
order increments and are typically held in sample stock. There
is a 10,000-piece order increment on nonstandard versions.
Other threshold voltages may be available; contact factory
for availability.
8
PART NO. SUFFIX
_______________________________________________________________________________________
WG
ZW
MS
MR
SY
TW
SV
RV
SH
RH
TG
SD
RD
YH
ZG
YD
VH
WE
VD
LT
TZ
RY
SF
RF
TE
YV
YF
ZE
WI
VF
ZI
TI
THRESHOLD(V)
V
CC
VOLTAGE
1 NOMINAL
4.625
4.375
4.375
3.075
2.925
2.625
3.075
2.925
2.625
3.075
2.925
2.625
3.075
2.925
2.625
3.075
2.925
2.625
2.313
2.188
2.313
2.188
2.313
2.188
2.313
2.188
1.665
1.575
1.665
1.575
1.665
1.575
THRESHOLD (V)
V
CC
VOLTAGE
2 NOMINAL
3.075
2.925
2.625
2.313
2.188
2.188
1.665
1.575
1.575
1.388
1.313
1.313
1.110
1.050
1.050
0.833
0.788
0.788
1.665
1.575
1.388
1.313
1.110
1.050
0.833
0.788
1.388
1.313
1.110
1.050
0.833
0.788
The MAX6730–MAX6735 microprocessor (µP) supervi-
sors maintain system integrity by alerting the µP to fault
conditions. The MAX6730–MAX6735 monitor one to
three supply voltages in µP-based systems and assert
an active-low reset output when any monitored supply
voltage drops below its preset threshold. The output
state remains valid for V
The two-letter code in the Reset Voltage Threshold
Suffix Guide (Table 1) indicates the threshold level
combinations for V
The MAX6730–MAX6735 feature an active-low reset out-
put (RST). RST asserts when the voltage at either V
V
drops below its threshold, or MR is driven low (Figure 1).
RST remains low for the reset timeout period (Table 2)
after V
respective thresholds and after MR releases high.
Whenever V
threshold before the end of the reset timeout period, the
internal timer restarts. The MAX6730/MAX6732/ MAX6734
provide an open-drain RST output, and the MAX6731/
MAX6733/MAX6735 provide a push-pull RST output.
Table 2. Reset Timeout Period Suffix Guide
CC
PERIOD SUFFIX
2 falls below the voltage threshold level, V
TIMEOUT
CC
D1
D2
D3
D5
D6
D4
1, V
CC
CC
1, V
2, and RSTIN increase above their
CC
CC
1 and V
2, or RSTIN go below the reset
Detailed Description
CC
MIN (ms)
ACTIVE TIMEOUT PERIOD
1120
140
280
560
1 or V
1.1
8.8
CC
CC
2.
Threshold Levels
2 greater than +0.8V.
Supply Voltages
Reset Output
MAX (ms)
1120
2240
17.6
280
560
2.2
CC
RSTIN
1 or