Table of Contents
Advertisement
Quick Links
Click
here
for production status of specific part numbers.
MAX6340/MAX6421–
MAX6426
General Description
The MAX6340/MAX6421–MAX6426 low-power micropro-
cessor supervisor circuits monitor system voltages from
1.6V to 5V. These devices perform a single function: they
assert a reset signal whenever the V
falls below its reset threshold. The reset output remains
asserted for the reset timeout period after V
above the reset threshold. The reset timeout is externally
set by a capacitor to provide more flexibility.
The MAX6421/MAX6424 have an active-low, push-
pull reset output. The MAX6422 has an active-high, push-
pull reset output and the MAX6340/MAX6423/ MAX6425/
MAX6426 have an active-low, open-drain reset output.
The MAX6421/MAX6422/MAX6423 are offered in 4-pin
SC70 or SOT143 packages. The MAX6340/MAX6424/
MAX6425/MAX6426 are available in 5-pin SOT23-5
packages.
Applications
● Portable Equipment
● Battery-Powered Computers/Controllers
● Automotive
● Medical Equipment
● Intelligent Instruments
● Embedded Controllers
● Critical µP Monitoring
● Set-Top Boxes
● Computers
Pin Configurations
TOP VIEW
V
1
CC
GND
2
( ) ARE FOR THE MAX6422
Pin Configurations continued at end of data sheet.
19-2440; Rev 9; 3/18
with Capacitor-Adjustable Reset Timeout Delay
supply voltage
CC
CC
4
RESET
MAX6421X
(RESET)
MAX6422X
MAX6423X
3
SRT
SC70
Low-Power, SC70/SOT µP Reset Circuits
Benefits and Features
● Monitor System Voltages from 1.6V to 5V
● Capacitor-Adjustable Reset Timeout Period
● Low Quiescent Current (1.6µA typ)
● Three RESET Output Options
Push-Pull RESET
rises
Push-Pull RESET
Open-Drain RESET
● Guaranteed Reset Valid to V
● Immune to Short V
● Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23
Packages
● MAX6340 Pin Compatible with LP3470
● MAX6424/MAX6425 Pin Compatible with
NCP300–NCP303, MC33464/MC33465,
S807/S808/S809, and RN5VD
● MAX6426 Pin Compatible with PST92XX
● AEC-Q100 Qualified (MAX6340UK31/V+T)
Typical Operating
Information
appear at end of data sheet.
= 1V
CC
Transients
CC
Circuit,
Selector
Guide, and
Ordering
Advertisement
Table of Contents
Related Manuals for Maxim Integrated MAX6340 Series
Summary of Contents for Maxim Integrated MAX6340 Series
-
Page 1: General Description
Click here for production status of specific part numbers. MAX6340/MAX6421– Low-Power, SC70/SOT µP Reset Circuits MAX6426 with Capacitor-Adjustable Reset Timeout Delay General Description Benefits and Features ● Monitor System Voltages from 1.6V to 5V The MAX6340/MAX6421–MAX6426 low-power micropro- cessor supervisor circuits monitor system voltages from ●... -
Page 2: Absolute Maximum Ratings
≥ 1.8V, I = 500µA SINK RESET Output Voltage Low ≥ 2.7V, I = 1.2mA SINK ≥ 4.5V, I = 3.2mA SINK Note 1: Devices production tested at +25°C. Overtemperature limits are guaranteed by design. Maxim Integrated │ 2 www.maximintegrated.com... -
Page 3: Typical Operating Characteristics
ABOVE THE CURVE = 2.95V 1000 TEMPERATURE (°C) RESET THRESHOLD OVERDRIVE (mV) TEMPERATURE (°C) POWER-UP/POWER-DOWN NORMALIZED RESET THRESHOLD CHARACTERISTIC vs. TEMPERATURE 1.006 = 1.6V 1.004 1.002 1V/div 1.000 0.998 RESET 0.996 1V/div 0.994 400s/div TEMPERATURE (°C) Maxim Integrated │ 3 www.maximintegrated.com... -
Page 4: Pin Description
(t ) by connecting a capacitor (C ) between RESET line. A 10kΩ to 100kΩ pullup is sufficient in most SRT and ground. Calculate the reset timeout capacitor applications. as follows: Maxim Integrated │ 4 www.maximintegrated.com... -
Page 5: Applications Information
RESET low (Figure 3). The value of the pulldown resis- tor is not critical; 100kΩ is large enough not to load RESET and small enough to pull RESET to ground. For applications using the MAX6422, a 100kΩ pullup resis- Maxim Integrated │ 5 www.maximintegrated.com... - Page 6 4.680 4.800 4.920 timeout period. When evaluating these parts, use clean prototype boards to ensure accurate reset periods. 4.778 4.900 5.023 4.875 5.000 5.125 Maxim Integrated │ 6 www.maximintegrated.com...
- Page 7 Open-Drain RESET MAX6422XS46+T Push-Pull RESET MAX6426UK46+T Open-Drain RESET *Sample stock is generally held on all standard versions. Contact Typical Operating Circuit factory for availability of nonstandard versions. LASER-TRIMMED RESISTORS RESET RESET RESET TIMEOUT MAX6421 MAX6424 Maxim Integrated │ 7 www.maximintegrated.com...
- Page 8 — — 4 SOT143/SC70 ✔ MAX6422 — — 4 SOT143/SC70 ✔ MAX6423 — — 4 SOT143/SC70 ✔ MAX6424 — — 5 SOT23 ✔ MAX6425 — — 5 SOT23 ✔ MAX6426 — — 5 SOT23 ✔ Maxim Integrated │ 8 www.maximintegrated.com...
-
Page 9: Ordering Information
All devices are available in tape-and-reel only. Devices are available in both leaded and lead-free packaging. “+” Denotes Lead(Pb)-free packages and “-” denotes leaded packages https://www.maximinte- For top mark information, please go to grated.com/en/design/packaging/topmark/ Chip Information TRANSISTOR COUNT: 295 PROCESS: BiCMOS Maxim Integrated │ 9 www.maximintegrated.com... -
Page 10: Revision History
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed.
Need help?
Do you have a question about the MAX6340 Series and is the answer not in the manual?
Questions and answers