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MAX16021PTEL+T

Description
supervisory circuits upwr w/bat-backup 4.6894v
CategoryPower/power management    The power supply circuit   
File Size266KB,21 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

MAX16021PTEL+T Overview

supervisory circuits upwr w/bat-backup 4.6894v

MAX16021PTEL+T Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFN
package instructionVQCCN, LCC16,.16SQ,25
Contacts16
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time7 weeks
Other featuresRESET THRESHOLD VOLTAGE IS 4.684V
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeS-XQCC-N16
length4 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeVQCCN
Encapsulate equivalent codeLCC16,.16SQ,25
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply1.5/5.5 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply current (Isup)0.005 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)1.53 V
Nominal supply voltage (Vsup)1.62 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formNO LEAD
Terminal pitch0.65 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width4 mm
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 V
CC
supply power-
up, power-down, and brownout conditions.
2) Control V
CC
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.
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
MAX16016/MAX16020/MAX16021
Ordering Information
PART
MAX16016_TB_+T
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
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.
Applications
Main/Backup Power for RTCs, CMOS Memories
Industrial Control
GPS Systems
Set-Top Boxes
Point-of-Sale Equipment
Portable/Battery Equipment
Pin Configurations
CEOUT
14
TOP VIEW
CEIN
V
CC
16
BATT
MR
PFI
WDI
1
2
15
13
12
11
RESET
GND
PFO
WDO
+
MAX16020
3
4
5
LL
6
BATT_TEST
7
BATTOK
EP
8
BATTON
10
9
TQFN
UL is a registered trademark of Underwriters Laboratories, Inc.
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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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