MAX16016 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX16016

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating

Maxim Integrated 

19-4145; Rev 6; 11/11

Low-Power µP Supervisory Circuits with

Battery-Backup Circuit and Chip-Enable Gating

General Description

The MAX16016/MAX16020/MAX16021 supervisory cir-

cuits monitor power supplies, provide battery-backup

control, and chip-enable (CE) gating to write protect

memory in microprocessor (µP)-based systems. These

low-power devices improve system reliability by providing

several supervisory functions in a small, single integrated

solution.

The MAX16016/MAX16020/MAX16021 perform four

basic system functions:

1) Provide a µP reset output during VCC supply power-

up, power-down, and brownout conditions.

2) Control VCC to battery-backup switching internally

to maintain data or low-power operation for memo-

ries, real-time clocks (RTCs), and other digital logic

when the main power is removed.

3) Provide memory write protection through internal

chip-enable gating during brownout.

4) Provide a combination of additional supervisory

functions listed in the Features section.

The MAX16016/MAX16020/MAX16021 operate from a

1.53V to 5.5V supply voltage and offer fixed reset

thresholds for monitoring 5V, 3.3V, 3V, 2.5V, and 1.8V

systems. Each device is available with either a push-

pull or open-drain reset output.

The MAX16016/MAX16020/MAX16021 are available in

small TDFN/TQFN packages and are fully specified for

an operating temperature range of -40°C to +85°C.

Applications

Main/Backup Power for RTCs, CMOS Memories

Industrial Control

GPS Systems

Set-Top Boxes

Point-of-Sale Equipment

Portable/Battery Equipment

Features

o System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V

Power-Supply Voltages

o 1.53V to 5.5V Operating Voltage Range

o Low 1.2µA Supply Current (0.25µA in Battery-

Backup Mode)

o 145ms (min) Reset Timeout Period

o Battery Freshness Seal

o On-Board Gating of CE Signals, 1.5ns

Propagation Delay (MAX16020/MAX16021)

o Debounced Manual Reset Input

o Watchdog Timer, 1.2s (typ) Timeout

o Power-Fail Comparator and Low-Line Indicator for

Monitoring Voltages Down to 0.6V

o Battery-On, Battery-OK, and Battery Test

Indicators

o Small 10-Pin TDFN or 16-Pin TQFN Packages

o UL®-Certified to Conform to IEC 60950-1

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX16016_TB_+T

-40°C to +85°C

10 TDFN-EP*

The first placeholder “_” designates all output options. Letter

“L” indicates push-pull outputs and letter “P” indicates open-

drain outputs. The last placeholder “_” designates the reset

threshold (see Table 1).

T = Tape and reel.

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Ordering Information continued at end of data sheet.

Selector Guide located at end of data sheet.

Pin Configurations

TOP VIEW

16 15 14 13

BATT 1 +

12 RESET

MR 2

PFI 3

WDI 4

5

MAX16020

11 GND

10 PFO

EP

9 WDO

6

7

8

UL is a registered trademark of Underwriters Laboratories, Inc.

TQFN

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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