MAX6897PAZT+T Maxim Integrated Products, MAX6897PAZT+T Datasheet

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MAX6897PAZT+T

Manufacturer Part Number
MAX6897PAZT+T
Description
Supervisory Circuits Adjustable Sequencer/Supervisor
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX6897PAZT+T

Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX6895–MAX6899 is a family of small, low-power,
voltage-monitoring circuits with sequencing capability.
These miniature devices offer tremendous flexibility with
an adjustable threshold capable of monitoring down to
0.5V and an external capacitor-adjustable time delay.
These devices are ideal for use in power-supply
sequencing, reset sequencing, and power-switching
applications. Multiple devices can be cascaded for
complex sequencing applications.
A high-impedance input with a 0.5V threshold allows an
external resistive divider to set the monitored threshold.
The output asserts (OUT = high or OUT = low) when
the input voltage rises above the 0.5V threshold and the
enable input is asserted (ENABLE = high or ENABLE =
low). When the voltage at the input falls below 0.5V or
when the enable input is deasserted (ENABLE = low or
ENABLE = high), the output deasserts (OUT = low or
OUT = high). All devices provide a capacitor-program-
mable delay time from when the input rises above 0.5V
to when the output is asserted. The MAX689_A versions
provide the same capacitor-adjustable delay from when
enable is asserted to when the output asserts. The
MAX689_P devices have a 1µs propagation delay from
when enable is asserted to when the output asserts.
The MAX6895A/P offers an active-high enable input
and an active-high push-pull output. The MAX6896A/P
offers an active-low enable input and an active-low
push-pull output. The MAX6897A/P offers an active-
high enable input and an active-high open-drain output.
Finally, the MAX6898A/P offers an active-low enable
input and an active-low open-drain output. The
MAX6899A/P offers an active-low enable with an active-
high push-pull output.
All devices operate from a 1.5V to 5.5V supply voltage
and are fully specified over the -40°C to +125°C operat-
ing temperature range. These devices are available in
ultra-small 6-pin µDFN (1.0mm x 1.5mm) and thin
SOT23 (1.60mm x 2.90mm) packages.
19-3673; Rev 7; 7/10
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
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.
Automotive
Medical Equipment
Intelligent Instruments
Portable Equipment
________________________________________________________________ Maxim Integrated Products
General Description
Computers/Servers
Critical µP Monitoring
Set-Top Boxes
Telecom
Applications
Sequencing/Supervisory Circuits
Ultra-Small, Adjustable
o 1.8% Accurate Adjustable Threshold Over
o Operate from V
o Capacitor-Adjustable Delay
o Active-High/-Low Enable Input Options
o Active-High/-Low Output Options
o Open-Drain (28V Tolerant)/Push-Pull Output
o Low Supply Current (10µA, typ)
o Fully Specified from -40°C to +125°C
o Ultra-Small 6-Pin µDFN Package or Thin SOT23
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX6895AALT+
MAX6895AAZT+
MAX6895PALT+T
MAX6895PAZT+
MAX6896AALT+
MAX6896AAZT+
MAX6896PALT+T
MAX6896PAZT+
Pin Configurations continued at end of data sheet.
Temperature
Options
Package
TOP VIEW
( ) FOR MAX6899 ONLY.
PART
CC
(ENABLE)
ENABLE
PIN-PACKAGE
6 µDFN
6 Thin SOT23
6 µDFN
6 Thin SOT23
6 µDFN
6 Thin SOT23
6 µDFN
6 Thin SOT23
of 1.5V to 5.5V
Ordering Information
V
1
CC
6
Pin Configurations
MAX6895
MAX6897
MAX6899
CDELAY
µDFN
GND
5
2
OUT
IN
3
4
Features
TOP MARK
+AADO
+AADK
+AADL
+AADP
+AW
+AX
+AY
+AZ
1

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MAX6897PAZT+T Summary of contents

Page 1

... Set-Top Boxes Portable Equipment Telecom Typical Operating Circuit and Selector Guide appear at end of data sheet. ________________________________________________________________ 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. Ultra-Small, Adjustable Sequencing/Supervisory Circuits o 1.8% Accurate Adjustable Threshold Over ...

Page 2

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits ABSOLUTE MAXIMUM RATINGS , ENABLE, ENABLE, IN....................................-0. OUT, OUT (push-pull) ................................-0. OUT, OUT (open-drain)..........................................-0.3V to +30V CDELAY......................................................-0. Output Current (all pins) ...................................................±20mA Continuous Power Dissipation (T = +70°C) A 6-Pin µDFN (derate 2.1mW/°C above +70°C)...........167.7mW 6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C) ...727.3mW Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four layer board ...

Page 3

... UVLO threshold, the outputs will deassert (OUT goes low, OUT goes high). When V Note 3: When V CC 1.2V, the out annot be determined. Note 4: Guaranteed by design. Note 5: During the initial power-up _______________________________________________________________________________________ Ultra-Small, Adjustable Sequencing/Supervisory Circuits CONDITIONS ≥ 1.2V 90µA, CC SINK MAX6895/MAX6897/MAX6899 only V OL ≥ ...

Page 4

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits (V = 3.3V and T = +25°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V (V) CC OUT DELAY vs. C CDELAY 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0 0 100 ...

Page 5

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits MAX6899 NAME THIN SOT23 Active-High Logic-Enable Input. Drive ENABLE low to immediately deassert the output to its false state (OUT = low or OUT = high) independent of V — ENABLE ENABLE high to assert the output to its true state (OUT = high or OUT = low) after the adjustable delay period (MAX689_A 150ns propagation delay (MAX689_P) ...

Page 6

... CDELAY Figure 1. MAX6895/MAX6899 Functional Diagram Detailed Description The MAX6895–MAX6899 is a family of ultra-small, low- power, sequencing/supervisory circuits. These devices provide adjustable voltage monitoring for inputs down to 0.5V. They are ideal for use in power-supply sequenc- ing, reset sequencing, and power-switching applica- tions. Multiple devices can be cascaded for complex sequencing applications ...

Page 7

... UVLO IN ENABLE OUT t PROPA Figure 2. MAX6895A/MAX6897A Timing Diagram _______________________________________________________________________________________ Ultra-Small, Adjustable Sequencing/Supervisory Circuits asserts (OUT goes high or OUT goes low). When the output asserts, C Adjust the delay (t (with ENABLE high or ENABLE low) to OUT going = high (OUT going low) according to the equation: ...

Page 8

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits UVLO IN ENABLE OUT t PROPA Figure 3. MAX6896A/MAX6898A Timing Diagram UVLO IN ENABLE OUT t PROPP Figure 4. MAX6895P/MAX6897P Timing Diagram 8 _______________________________________________________________________________________ t < t PROPA t DELAY OFF t > DELAY OFF t > PROPA t PROPP ...

Page 9

... UVLO IN ENABLE OUT t PROPP Figure 5. MAX6896P/MAX6898P Timing Diagram UVLO IN ENABLE OUT t PROPA Figure 6. MAX6899A Timing Diagram _______________________________________________________________________________________ Ultra-Small, Adjustable Sequencing/Supervisory Circuits t DELAY DELAY > OFF PROPP t < > t PROPA PW t PROPA t OFF 9 ...

Page 10

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits UVLO IN ENABLE OUT t PROPP Figure 7. MAX6899P Timing Diagram Enable Input (ENABLE or ENABLE ) The MAX6895/MAX6897 offer an active-high enable input (ENABLE), while the MAX6896/MAX6898/MAX6899 offer an active-low enable input (ENABLE). With drive ENABLE high (ENABLE low) to force OUT high TH (OUT low) after the adjustable delay time (A versions). For P version devices, when V > ...

Page 11

... CDELAY R2 GND Figure 8. Overvoltage Protection ______________________________________________________________________________________ Ultra-Small, Adjustable Sequencing/Supervisory Circuits used with a p-channel MOSFET in an overvoltage pro- tection circuit. Figure 9 shows the MAX6895 in a low- voltage sequencing application using an n-channel MOSFET. Figure 10 shows the MAX6895 used in a mul- tiple-output sequencing application. ...

Page 12

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits 5V BUS DC-DC EN SYSTEM ENABLE ENABLE MAX6895 OUT GND C CDELAY Figure 10. Multiple-Output Sequencing 12 ______________________________________________________________________________________ 2.5V 3.3V DC-DC EN ENABLE V ENABLE MAX6895 MAX6895 OUT GND GND C CDELAY 1.2V 1.8V DC-DC DC- ENABLE MAX6895 OUT OUT GND C C CDELAY CDELAY ...

Page 13

... Active-High MAX6895PALT+T Active-High MAX6895PAZT+T Active-High MAX6896AALT+T Active-Low MAX6896AAZT+T Active-Low MAX6896PALT+T Active-Low MAX6896PAZT+T Active-Low MAX6897AALT+T Active-High MAX6897AAZT+T Active-High MAX6897PALT+T Active-High MAX6897PAZT+T Active-High MAX6898AALT+T Active-Low MAX6898AAZT+T Active-Low MAX6898PALT+T Active-Low MAX6898PAZT+T Active-Low MAX6899AALT+T Active-Low MAX6899AAZT+T Active-Low MAX6899PALT+T Active-Low MAX6899PAZT+T Active-Low Ordering Information (continued) PART ...

Page 14

... Ultra-Small, Adjustable Sequencing/Supervisory Circuits TOP VIEW V CDELAY MAX6896 MAX6898 1 2 ENABLE GND µDFN Chip Information PROCESS: BiCMOS 14 ______________________________________________________________________________________ Pin Configurations (continued) TOP VIEW OUT TOP VIEW + ENABLE 1 6 CDELAY GND MAX6896 MAX6898 OUT MAX6899 (OUT) THIN SOT23 For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “ ...

Page 15

... 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 ____________________ 15 © 2010 Maxim Integrated Products ...

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