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MAX6723AUTTFD3 View Datasheet(PDF) - Maxim Integrated

Part NameMAX6723AUTTFD3 MaximIC
Maxim Integrated MaximIC
DescriptionDual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits


MAX6723AUTTFD3 Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Dual/Triple, Ultra-Low-Voltage, SOT23 µP
Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(VCC1 = 0.8V to 5.5V, VCC2 = 0.8V to 5.5V, GND = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
Reset Threshold Tempco
Reset Threshold Hysteresis
VTH/°C
VHYST Referenced to VTH typical
VCC to Reset Output Delay
tRD
VCC1 = (VTH1+ 100mV) to (VTH1 - 100mV) or
VCC2 = (VTH2 + 75mV) to (VTH2 - 75mV)
D1
1.1
D2
8.8
D7 (MAX6797A only)
17.5
D8 (MAX6797A only)
35
Reset Timeout Period
tRP
D3
140
D5
280
D6
560
D4
1120
ADJUSTABLE RESET COMPARATOR INPUT (MAX6719A/MAX6720A/MAX6723A–MAX6727A)
RSTIN Input Threshold
RSTIN Input Current
VRSTIN
IRSTIN
611
-100
TYP
20
0.5
20
1.65
13.2
26.25
52.5
210
420
840
1680
626.5
MAX
UNITS
ppm/°C
%
µs
2.2
17.6
35
70
ms
280
560
1120
2240
642
mV
+100 nA
RSTIN Hysteresis
3
mV
RSTIN to Reset Output Delay
tRSTIND VRSTIN to (VRSTIN - 30mV)
POWER-FAIL INPUT (MAX6728A/MAX6729A)
PFI Input Threshold
VPFI
PFI Input Current
IPFI
PFI Hysteresis
PFI to PFO Delay
VPFH
tDPF
(VPFI + 30mV) to (VPFI - 30mV)
MANUAL-RESET INPUT (MAX6715A–MAX6722A/MAX6725A–MAX6729A)
MR Input Voltage
VIL
VIH
MR Minimum Pulse Width
MR Glitch Rejection
MR to Reset Delay
tMR
MR Pullup Resistance
WATCHDOG INPUT (MAX6721A–MAX6729A)
Watchdog Timeout Period
First watchdog period after reset timeout
tWD
period
Normal mode
WDI Pulse Width
WDI Input Voltage
WDI Input Current
tWDI
VIL
VIH
IWDI
(Note 2)
WDI = 0V or VCC1
22
µs
611 626.5 642
mV
-100
+100 nA
3
mV
2
µs
0.3 VCC1
V
0.7 VCC1
1
µs
100
ns
200
ns
25
50
80
k
35
54
72
s
1.12 1.68 2.24
50
ns
0.7 VCC1
-1
0.3 VCC1
V
+1
µA
_______________________________________________________________________________________ 3
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General Description
The MAX6715A–MAX6729A/MAX6797A are ultra-low-voltage microprocessor (µP) supervisory circuits designed to monitor two or three system power-supply voltages. These devices assert a system reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components.

Features
♦ VCC1 (Primary Supply) Reset Threshold Voltages from 1.58V to 4.63V
♦ VCC2 (Secondary Supply) Reset Threshold Voltages from 0.79V to 3.08V
♦ Externally Adjustable RSTIN Threshold for Auxiliary/Triple-Voltage Monitoring
(0.62V Internal Reference)
♦ Watchdog Timer Option
  35s (min) Long Startup Period
  1.12s (min) Normal Timeout Period
♦ Manual-Reset Input Option
♦ Power-Fail Input/Power-Fail Output Option (Push-Pull and Open-Drain Active-Low)
♦ Guaranteed Reset Valid Down to VCC1 or VCC2 = 0.8V
♦ Reset Output Logic Options
♦ Immune to Short VCC Transients
♦ Low Supply Current 14µA (typ) at 3.6V
♦ Watchdog Disable Feature
♦ Small 5-, 6-, and 8-Pin SOT23 Packages

Applications
Multivoltage Systems
Telecom/Networking Equipment
Computers/Servers
Portable/Battery Operated Equipment
Industrial Equipment
Printers/Fax Machines
Set-Top Boxes

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