MAX817L, MAX817M, MAX818L, MAX818M, MAX819L, MAX819M +5V Microprocessor Supervisory Circuits

Description

The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. These devices are designed for use in +5V-powered systems. Low supply current (11µA typical) and small package size make these devices ideal for portable applications. The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on V_CC. Other supervisory functions include active-low reset, backup-battery switchover, watchdog input, battery freshness seal, and chip-enable gating. The Selector Guide below lists the specific functions available from each device.

These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.

Key Features

Applications/Uses

Precision Supply-Voltage Monitor:

4.65V (MAX81_L)
4.40V (MAX81_M)

11µA Quiescent Supply Current
200ms Reset Time Delay
Watchdog Timer with 1.6sec Timeout (MAX817/MAX818)
Battery-Backup Power Switching; Battery Voltage Can Exceed V_CC
Battery Freshness Seal
On-Board, 3ns Gating of Chip-Enable Signals (MAX818)
Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819)
Manual Reset Input (MAX819)

	Battery-Powered Computers/Controllers
	Critical µP Monitoring
	Embedded Controllers
	Intelligent Instruments
	Portable Equipment

Key Specifications: Battery Backup Circuits

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Features

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX817

3.3 to 5.5

Push-Pull

•	Adjustable Reset Input

•	Batt Freshness Seal

•	Power Fail Comparator

•

Watchdog

Yes

PDIP/8
SOIC/8
uMAX/8

-40 to +85
0 to +70

$2.44 @ 1k

MAX818

•	Batt Freshness Seal

•	Chip Enable Gate

•

Watchdog

$2.74 @ 1k

MAX819

•	Adjustable Reset Input

•	Batt Freshness Seal

•	Manual Reset

•	Power Fail Comparator

•

Watchdog

$2.07 @ 1k

See All Battery Backup Circuits (84)

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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-98 of 98

MAX817L

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX817LCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LESA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LESA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LESA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCUA-T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817LCUA+

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817LCUA+T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817M

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX817MCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MESA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MESA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MESA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX817MCUA-T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX817MCUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818L

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX818LCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LESA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LESA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818LESA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LCUA-T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LCUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818LCUA+T

0°C to +70°C

See data sheet

MAX818LCUA+

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818M

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX818MCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MESA-T

See data sheet

MAX818MESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

RoHS/Lead-Free: No
Materials Analysis

MAX818MCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MESA+T

-40°C to +85°C

See data sheet

MAX818MESA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MCUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MCUA-T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX818MCUA+

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX818MCUA+T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819L

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX819LCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LESA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LESA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LESA+T

-40°C to +85°C

See data sheet

MAX819LCUA+

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LCUA-T

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LCUA+T

0°C to +70°C

See data sheet

MAX819LCUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LEUA+T

-40°C to +85°C

See data sheet

MAX819LEUA+

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819LEUA

uMAX;8 pin;16 mm²
Dwg: 21-0036J (PDF)
Use pkgcode/variation: U8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX819LEUA-T

-40°C to +85°C

See data sheet

MAX819M

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX819MCPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819MCPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819MEPA

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX819MEPA+

PDIP;8 pin;82 mm²
Dwg: 21-0043
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819MCSA+

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819MCSA-T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819MCSA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX819MCSA+T

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX819MESA

SOIC;8 pin;31 mm²
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No