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MAX16056, MAX16057, MAX16058, MAX16059
125nA Supervisory Circuits with Capacitor-Adjustable Reset and Watchdog Timeouts
Capacitor-Adjustable Nanopower Supervisory Circuits
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Status
Active: In Production.
Description
The MAX16056–MAX16059 are ultra-low-current 125nA (typ) microprocessor (µP) supervisory circuits that monitor a single system supply voltage. These devices assert an active-low reset signal whenever the VCC supply voltage drops below the factory trimmed reset threshold, manual reset is pulled low, or the watchdog timer runs out (MAX16056/MAX16058). The reset output remains asserted for an adjustable reset timeout period after VCC rises above the reset threshold. Factory-trimmed reset threshold voltages are offered from 1.575V to 4.625V in approximately 100mV increments (see Table 1 in the full data sheet).
These devices feature adjustable reset and watchdog timeout using external capacitors. The MAX16056/MAX16058 contain a watchdog timer with a watchdog select input (WDS) that multiplies the watchdog timeout period by 128. The MAX16057/MAX16059 do not have the watchdog feature.
The MAX16056–MAX16059 are available in either push-pull or open-drain output-type configurations (see the Ordering Information in the full data sheet). These devices are fully specified over the -40°C to +125°C automotive temperature range. The MAX16056/MAX16058 are available in the 8-pin TDFN package, and the MAX16057/MAX16059 are available in the 6-pin TDFN package.
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Data Sheet
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Key Features
- Ultra-Low 125nA (typ) Supply Current
- 1.1V to 5.5V Operating Supply Range
- Factory-Set Reset Threshold Options from 1.575V to 4.625V in Approximately 100mV Increments
- Capacitor-Adjustable Reset Timeout
- Capacitor-Adjustable Watchdog Timeout (MAX16056/MAX16058)
- Watchdog Timer Capacitor Open Detect Function
- Optional Watchdog Disable Function (MAX16056/MAX16058)
- Manual Reset Input
- Guaranteed Active-Low RESET Valid for VCC ≥ 1.1V
- Push-Pull or Open-Drain Active-Low RESET Output Options
- Power-Supply Transient Immunity
- Small, 3mm x 3mm TDFN Package
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Applications/Uses
- Automotive Infotainment
- Glucose Monitors/Patient Monitors
- Metering/HVAC
- MP3 Players/Pagers
- PDAs/Cell Phones
- Portable/Battery-Powered Equipment
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Key Specifications:
| Supervisors (1 Monitored Voltage) |
| Part Number |
Reset Thresh.
(V) |
Reset Out |
tRESET |
Watchdog Feature |
Watchdog Timeout |
Supervisor Features |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Budgetary Price |
| min |
@ +25°C |
max |
See Notes |
| MAX16056 |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Adjustable |
| Cap Adjustable | | Input (WDI) |
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Adjustable |
Manual Reset |
2.5 |
0.125 |
$1.97 @1k |
| MAX16057 |
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No Watchdog |
- |
$1.56 @1k |
| MAX16058 |
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| Cap Adjustable | | Input (WDI) |
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Adjustable |
$1.56 @1k |
| MAX16059 |
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No Watchdog |
- |
$1.53 @1k |
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See All Supervisors (1 Monitored Voltage) (274)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
More Information
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Information Index
Document Ref.: 19-4686
Rev 1;
2010-08-30
This page last modified: 2011-04-04
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