MAX16016LTBS+T Maxim Integrated Products, MAX16016LTBS+T Datasheet

IC UP SUPERVISOR LP 10TDFN-EP

MAX16016LTBS+T

Manufacturer Part Number
MAX16016LTBS+T
Description
IC UP SUPERVISOR LP 10TDFN-EP
Manufacturer
Maxim Integrated Products
Type
Battery Backup Circuitr
Datasheet

Specifications of MAX16016LTBS+T

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
145 ms Minimum
Voltage - Threshold
2.93V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-TDFN Exposed Pad
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
2) Control V
3) Provide memory write protection through internal
4) Provide a combination of additional supervisory
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.
19-4145; Rev 4; 1/10
UL is a registered trademark of Underwriters Laboratories, Inc.
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.
Battery-Backup Circuit and Chip-Enable Gating
up, power-down, and brownout conditions.
to maintain data or low-power operation for memo-
ries, real-time clocks (RTCs), and other digital logic
when the main power is removed.
chip-enable gating during brownout.
functions listed in the Features section.
Main/Backup Power for RTCs, CMOS Memories
Industrial Control
GPS Systems
Set-Top Boxes
Point-of-Sale Equipment
Portable/Battery Equipment
CC
to battery-backup switching internally
________________________________________________________________ Maxim Integrated Products
Low-Power µP Supervisory Circuits with
General Description
Applications
CC
supply power-
o System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V
o 1.53V to 5.5V Operating Voltage Range
o Low 1.2µA Supply Current (0.25µA in Battery-
o 145ms (min) Reset Timeout Period
o Battery Freshness Seal
o On-Board Gating of CE Signals, 1.5ns
o Debounced Manual Reset Input
o Watchdog Timer, 1.2s (typ) Timeout
o Power-Fail Comparator and Low-Line Indicator for
o Battery-On, Battery-OK, and Battery Test
o Small 10-Pin TDFN or 16-Pin TQFN Packages
o UL
Ordering Information continued at end of data sheet.
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.
Selector Guide located at end of data sheet.
MAX16016_TB_+T
Power-Supply Voltages
Backup Mode)
Propagation Delay (MAX16020/MAX16021)
Monitoring Voltages Down to 0.6V
Indicators
Pin Configurations continued at end of data sheet.
®
-Certified to Conform to IEC 60950-1
PART
TOP VIEW
BATT
WDI
MR
PFI
1
2
3
4
16
+
5
Ordering Information
-40°C to +85°C
TEMP RANGE
MAX16020
15
6
Pin Configurations
TQFN
14
7
EP
13
8
12
11
10
9
RESET
GND
PFO
WDO
PIN-PACKAGE
Features
10 TDFN-EP*
1

Related parts for MAX16016LTBS+T

MAX16016LTBS+T Summary of contents

Page 1

... GPS Systems Set-Top Boxes Point-of-Sale Equipment Portable/Battery Equipment registered trademark of Underwriters Laboratories, Inc. ________________________________________________________________ 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. 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 1.2µ ...

Page 2

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ABSOLUTE MAXIMUM RATINGS V , BATT, OUT, BATT_TEST to GND.....................-0.3V to +6V CC RESET, RESET, PFO, BATTOK, WDO, BATTON, BATT_TEST, LL, (all open-drain) to GND .................-0.3V to +6V RESET, RESET, ...

Page 3

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ELECTRICAL CHARACTERISTICS (continued 1.53V to 5.5V 3V -40°C to +85°C, unless otherwise noted. Typical values are BATT A PARAMETER SYMBOL RESET ...

Page 4

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ELECTRICAL CHARACTERISTICS (continued 1.53V to 5.5V 3V -40°C to +85°C, unless otherwise noted. Typical values are BATT A PARAMETER SYMBOL WATCHDOG ...

Page 5

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ELECTRICAL CHARACTERISTICS (continued 1.53V to 5.5V 3V -40°C to +85°C, unless otherwise noted. Typical values are BATT A PARAMETER SYMBOL LOW ...

Page 6

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating Table 2. Low-Line Threshold Ranges SUFFIX 5V 0V +25°C, unless otherwise noted.) CC BATT A ...

Page 7

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ( +25°C, unless otherwise noted.) CC BATT OUT ON-RESISTANCE CC vs. TEMPERATURE 3.15V 65mA CC ...

Page 8

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ( +25°C, unless otherwise noted.) CC BATT A WDO OUTPUT VOLTAGE LOW vs. SINK CURRENT 0.5 0.4 0 3.3V CC 0.2 ...

Page 9

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating PIN NAME 1 V Supply Voltage Input. Bypass V CC Backup Battery Input BATT BATT CC capacitor. Active-Low Manual Reset Input. RESET asserts when MR ...

Page 10

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating PIN NAME MAX16020 MAX16021 1 1 BATT PFI 4 4 WDI — BATT_TEST — 6 RESET 7 7 BATTOK 8 8 ...

Page 11

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating Pin Description—MAX16020/MAX16021 (continued) PIN NAME MAX16020 MAX16021 WDO 9 9 PFO GND RESET OUT CEOUT 14 14 CEIN ...

Page 12

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating BATTERY FRESHNESS SEAL PFI WDI 100nA 12 ______________________________________________________________________________________ BATT OUT REF CLEAR WATCHDOG WATCHDOG TRANSITION TIMER DETECTOR 25kΩ GND Functional Diagrams OUT BATTON RESET DELAY RESET PFO ...

Page 13

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating BATTERY FRESHNESS SEAL PF1 WATCHDOG WDI TRANSITION DETECTOR 25kΩ CEIN 100nA MAX16020 MAX16021 ______________________________________________________________________________________ Functional Diagrams (continued) BATT OUT REF OUT CE OUTPUT CONTROL CLEAR WATCHDOG TIMER ...

Page 14

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating Detailed Description The Typical Application Circuit shows a typical connec- tion using the MAX16020. OUT powers the static ran- dom-access memory (SRAM reset threshold ( ...

Page 15

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating The watchdog monitors µP activity through the input WDI. If the µP becomes inactive, either the reset output is asserted in pulses (MAX16016) or the watchdog output goes low (MAX16020/MAX16021). ...

Page 16

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating To reenable the freshness seal: 1) Connect a battery to BATT. 2) Bring Drive MR higher than V + 1.2V for at least 3µs. BATT ...

Page 17

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating Adding Hysteresis to PFI The power-fail comparators have a typical input hys- teresis This is sufficient for most applica- PFT-HYS tions where a power-supply line is being ...

Page 18

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating BATT V CC MAX16020L BATT_TEST Figure 6. Adjustable BATT_TEST Load 18 ______________________________________________________________________________________ When V is above removed without danger of triggering a reset pulse. The device does ...

Page 19

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating TOP VIEW MAX16016 + TDFN SECONDARY 0.1µF DC VOLTAGE R1 PFI R2 PFO MR BATT 0.1µF ______________________________________________________________________________________ Pin Configurations (continued) BATT ...

Page 20

Low-Power µP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating ALL LOGIC PART OUTPUTS (EXCEPT BATT_TEST) MAX16016LTB_ Push-pull MAX16016PTB_ Open-drain MAX16020LTE_ Push-pull MAX16020PTE_ Open-drain MAX16021LTE_ Push-pull MAX16021PTE_ Open-drain Ordering Information (continued) PART TEMP RANGE MAX16020_TE_+T -40°C to +85°C MAX16021_TE_+T -40°C ...

Page 21

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21 © 2010 Maxim Integrated Products ...

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