MAX816CSA Maxim Integrated Products, MAX816CSA Datasheet

IC MPU SUPERVISORY CIRCUIT 8SOIC

MAX816CSA

Manufacturer Part Number
MAX816CSA
Description
IC MPU SUPERVISORY CIRCUIT 8SOIC
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MAX816CSA

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active High/Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
Adjustable/Selectable
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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The MAX814/MAX815/MAX816 are high-accuracy
microprocessor (µP) supervisory circuits that provide
power-on reset, watchdog, and power-fail functions.
They eliminate manual trimming and improve reliability
in critical applications needing high-accuracy reset
thresholds. The RESET output is guaranteed to be in
the correct state for V
parator is designed to ignore fast transients on V
Reset thresholds are available for operation with a vari-
ety of 3V and 5V supply voltages.
A 75µA maximum supply current makes the MAX814/
MAX815/MAX816 ideal for use in portable equipment. All
three devices are available in 8-pin DIP and SO pack-
ages. See the Selector Table for a review of features.
________________________Applications
19-0412; Rev 1; 12/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
RESET Output
RESET Output
Manual Reset
V
Power-Fail Monitor
Low-Line Detector
Watchdog Circuit
_______________General Description
_____________________Selector Table
__________________________________________________________Pin Configurations
CC
Reset Voltage
FEATURE
TOP VIEW
Medical Equipment
Controllers
Intelligent Instruments
Critical µP Power Monitoring
Portable/Battery-Powered Equipment
Set-Top Boxes
GND
V
MR
PFI
CC
1
2
3
4
________________________________________________________________ Maxim Integrated Products
±1% Accuracy, Low-Power, +3V and +5V
K, L, N, T
MAX814
DIP/SO
CC
MAX814
down to 1V. The reset com-
8
7
6
5
K, L, N, T
MAX815
RESET
RESET
LOW LINE
PFO
Adjustable
GND
MAX816
V
MR
PFI
CC
1
2
3
4
CC
.
DIP/SO
MAX815
µP Supervisory Circuits
♦ ±1% Worst-Case Reset Threshold Accuracy
♦ 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset
♦ ±1% Low-Line Threshold Accuracy (MAX814)
♦ 200ms Reset Time Delay
♦ Active-Low RESET Output
♦ 75µA Max Supply Current
♦ Guaranteed RESET Valid to V
♦ Manual Reset Input
♦ ±2% Power-Fail Comparator
♦ Independent Watchdog with 1.56sec Timeout
♦ Power-Supply Glitch Immunity
♦ 8-Pin SO and DIP Packages
Ordering Information continued at end of data sheet.
Reset Trip Thresholds table appears at end of data sheet.
____________________________Features
*The MAX814/MAX815 offer a choice of reset threshold voltages.
From the Reset Trip Threshold table, select the suffix corre-
sponding to the desired threshold and insert it into the blank to
complete the part number.
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
______________Ordering Information
MAX814_CPA
Thresholds
60mV Above Reset Threshold
Active-High RESET Output (MAX814/MAX816)
(MAX815)
PART*
8
7
6
5
WDO
RESET
WDI
PFO
GND
V
MR
PFI
CC
TEMP RANGE
0°C to +70°C
1
2
3
4
DIP/SO
MAX816
CC
= 1V
8 PDIP
PIN-PACKAGE
8
7
6
5
RESET
RESET
RESET IN
PFO
1

Related parts for MAX816CSA

MAX816CSA Summary of contents

Page 1

... MAX814 GND 3 PFI 4 DIP/SO ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. µP Supervisory Circuits ____________________________Features ♦ ±1% Worst-Case Reset Threshold Accuracy ♦ 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset Thresholds ♦ ...

Page 2

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect GND) V ....................................................................-0.3V to +6.0V CC All Other Pins (Note 1)........................... -0. Terminal Current (PFI, RESET IN, MR)................................10mA Terminal Current (all other ...

Page 3

Accuracy, Low-Power, +3V and +5V ELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K (continued 4.85V to 5.5V for MAX814K/MAX815K MAX815N unless otherwise noted.) A MIN MAX PARAMETER SYMBOL MR Pull-Up ...

Page 4

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits ELECTRICAL CHARACTERISTICS, +3V Parts (MAX814/MAX815T, MAX816) (continued 3.06V to 5.5V for MAX814T/MAX815T and MAX816 PARAMETER SYMBOL WDI Pulse Width t WP WDI Input Threshold V WDI WDI ...

Page 5

Accuracy, Low-Power, +3V and +5V __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE CC 3V PARTS (MAX814T/MAX815T, MAX816 5. 3. ...

Page 6

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits ____________________________Typical Operating Characteristics (continued +25°C, unless otherwise noted.) A RESET THRESHOLD DEVIATION vs. TEMPERATURE 3V PARTS (MAX814T/MAX815T, MAX816 -60 -40 - ...

Page 7

Accuracy, Low-Power, +3V and +5V ______________________________________________________________Pin Description PIN MAX814 MAX815 MAX816 — — — — 6 — 6 — — — — ...

Page 8

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits +3.3V + MAX814K/L/N PFI RESET MR RESET PFO GND Figure 1a. Typical Application for Dual +3.3V and +5V Systems V CC +12V SUPPLY V CC MAX815 RESET PFI WDI ...

Page 9

Accuracy, Low-Power, +3V and +5V MAX814 150µA 1 RESET MR GENERATOR 60mV RESET THRESHOLD 4 PFI POWER- FAIL THRESHOLD 3 GND Figure 4. MAX814 Block Diagram MAX816 150µA 1 RESET MR GENERATOR 6 ...

Page 10

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits Reset Threshold The MAX814/MAX815 have fixed, factory-set reset thresholds, signified by the first suffix letter in the part number (see Figure 7 for more information on reset ranges). The MAX816 has ...

Page 11

Accuracy, Low-Power, +3V and + greater than or equal to the minimum IC operat- RT ing voltages (V ). The 1% “L” series allows the use ICMIN ±5% power supply, and guarantees system ...

Page 12

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits WDI WDO RESET RESET 0V Figure 8. MAX815 Watchdog Timing where C is ...

Page 13

Accuracy, Low-Power, +3V and +5V MAX814 MAX815 MAX816 RESET Figure 10. RESET Valid to Ground Circuit Monitoring Voltages Other than V Monitor voltages other than the V voltage divider to PFI and adjusting the ratio appropri- ately. If required, ...

Page 14

Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits + MAX814 MAX815 PFO PFI MAX816 R2 RESET GND V- + +5V PFO TRIP 5 - 2.5 2 TRIP , ...

Page 15

... MAX815_EPA -40°C to +85°C MAX815_ESA -40°C to +85°C MAX816CPA 0°C to +70°C MAX816CSA 0°C to +70°C MAX816EPA -40°C to +85°C MAX816ESA -40°C to +85°C *The MAX814/MAX815 offer a choice of reset threshold voltage. From the Reset Trip Threshold table, select the suffix corre- sponding to the desired threshold and insert it into the blank to complete the part number ...

Page 16

... 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...

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