MAX6317 MAXIM [Maxim Integrated Products], MAX6317 Datasheet

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MAX6317

Manufacturer Part Number
MAX6317
Description
5-Pin uP Supervisory Circuits with Watchdog and Manual Reset
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX6317HUK46CY
Manufacturer:
maxim
Quantity:
5 321
Part Number:
MAX6317HUK46CY+T
Manufacturer:
MAXIM
Quantity:
169
Part Number:
MAX6317HUK46CY+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX6316–MAX6322 family of microprocessor (µP)
supervisory circuits monitors power supplies and
microprocessor activity in digital systems. It offers sev-
eral combinations of push/pull, open-drain, and bidirec-
tional (such as Motorola 68HC11) reset outputs, along
with watchdog and manual reset features. The Selector
Guide below lists the specific functions available from
each device. These devices are specifically designed
to ignore fast negative transients on V
guaranteed valid for V
These devices are available in 26 factory-trimmed reset
threshold voltages (from 2.5V to 5V, in 100mV incre-
ments), featuring four minimum power-on reset timeout
periods (from 1ms to 1.12s), and four watchdog timeout
periods (from 6.3ms to 25.6s). Thirteen standard ver-
sions are available with an order increment requirement
of 2500 pieces (see Standard Versions table); contact
the factory for availability of other versions, which have
an order increment requirement of 10,000 pieces.
The MAX6316–MAX6322 are offered in a miniature
5-pin SOT23 package.
________________________Applications
19-0496; Rev 10; 10/11
________________General Description
* The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device.
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.
___________________________________________________________________Selector Guide
MAX6316L
MAX6316M
MAX6317H
MAX6318LH
MAX6318MH
MAX6319LH
MAX6319MH
MAX6320P
MAX6321HP
MAX6322HP
PART
Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Embedded Control Systems
WATCHDOG
________________________________________________________________ Maxim Integrated Products
INPUT
CC







down to 1V.
5-Pin µP Supervisory Circuits with
MANUAL
RESET
INPUT







CC
. Resets are
Watchdog and Manual Reset
ACTIVE-LOW
PUSH/PULL



o Small 5-Pin SOT23 Package
o Available in 26 Reset Threshold Voltages
o Four Reset Timeout Periods
o Four Watchdog Timeout Periods
o Four Reset Output Stages
o Guaranteed Reset Valid to V
o Immune to Short Negative V
o Low Cost
o No External Components
Ordering Information continued at end of data sheet.
____________________________Features
_______________Ordering Information
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
/V Denotes an automotive-qualified part.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
MAX6316LUK_ _ _ _ - T
MAX6316LUK_ _ _ _ / V - T
MAX6316MUK_ _ _ _ - T
MAX6317HUK_ _ _ _ - T
MAX6318HUK_ _ _ _ - T
MAX6318MHUK_ _ _ _ - T
2.5V to 5V, in 100mV Increments
1ms, 20ms, 140ms, or 1.12s (min)
6.3ms, 102ms, 1.6s, or 25.6s (typ)
Active-High, Push/Pull
Active-Low, Push/Pull
Active-Low, Open-Drain
Active-Low, Bidirectional
ACTIVE-HIGH
PUSH/PULL
PART







RESET OUTPUTS*
BIDIRECTIONAL
ACTIVE-LOW
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE



CC
CC
Transients
= 1V
ACTIVE-LOW
OPEN-DRAIN
PIN-PACKAGE
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23



1

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MAX6317 Summary of contents

Page 1

... Information PART MAX6316LUK_ MAX6316LUK_ MAX6316MUK_ MAX6317HUK_ MAX6318HUK_ MAX6318MHUK_ Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. /V Denotes an automotive-qualified part. ...

Page 2

... Reset Threshold (Note 2) V RST Reset Threshold Hysteresis Reset Active Timeout Period RESET Delay PUSH/PULL RESET OUTPUT (MAX6316L/MAX6317H/MAX6318_H/MAX6319_H/MAX6321HP/MAX6322HP RESET Output Voltage V OH RES 6316L 6318LH , M AX 6319LH ) V OL RESET Output Voltage ...

Page 3

... WATCHDOG INPUT (MAX6316/MAX6317H/MAX6318_H/MAX6320P/MAX6321HP) Watchdog Timeout Period WDI Pulse Width WDI Input Threshold WDI Input Current (Note 7) MANUAL RESET INPUT (MAX6316_/MAX6317H/MAX6319_H/MAX6320P/MAX6322HP) MR Input Threshold MR Input Pulse Width MR Glitch Rejection MR Pullup Resistance MR to Reset Delay Note 4: This is the minimum time RESET must be held low by an external pulldown source to set the active pullup flip-flop. ...

Page 4

... TEMPERATURE (°C) MAX6316/MAX6317/MAX6318/MAX6320/MAX6321 NORMALIZED WATCHDOG TIMEOUT 1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0. 100 -40 74HC05 INPUT 1000 - V RST CC MAX6316/MAX6317/MAX6319/MAX6320/MAX6322 MANUAL RESET TO RESET PROPAGATION DELAY vs. TEMPERATURE 320 300 280 260 240 220 200 180 160 140 -40 - TEMPERATURE (°C) PERIOD vs. TEMPERATURE - ...

Page 5

... Supervisory Circuits with ______________________________________________________________Pin Description PIN MAX6316L MAX6318LH MAX6316M MAX6317H MAX6318MH MAX6320P MAX6321HP 1 — — _______________________________________________________________________________________ Watchdog and Manual Reset MAX6319LH NAME MAX6319MH MAX6322HP RESET RESET 2 2 GND MR — — WDI ...

Page 6

... MAX6317/MAX6318/MAX6320/MAX6321 are also capa- ble of asserting a reset should the µP become stuck in an infinite loop. The MAX6316L/MAX6318LH/MAX6319LH feature an active-low reset output, while the MAX6317H/ MAX6318_H/MAX6319_H/MAX6321HP/MAX6322HP feature an active-high reset output. RESET is guaran- teed logic low and RESET is guaranteed logic high for V down to 1V ...

Page 7

Bidirectional Output The MAX6316M/MAX6318MH/MAX6319MH are designed to interface with µPs that have bidirectional reset pins, such as the Motorola 68HC11. Like an open-drain output, these devices allow the µP or ...

Page 8

Supervisory Circuits with Watchdog and Manual Reset V LASER- TRIMMED RESISTORS GENERATOR 2µs ONE SHOT TRANSITION R S ACTIVE PULLUP ENABLE COMPARATOR Figure 4. MAX6316/MAX6318MH/MAX6319MH Bidirectional Reset Output Functional Diagram 8 _______________________________________________________________________________________ CC MAX6316M MAX6318MH MAX6319MH V CC ...

Page 9

... PULLUP TURNS ON the supply monitored by V voltage at MR will never exceed V The MAX6316_/MAX6317H/MAX6318_H/MAX6320P/ MAX6321HP feature a watchdog circuit that monitors +5.0V the µP’s activity. If the µP does not toggle the watchdog input (WDI) within the watchdog timeout period (t reset asserts. The internal watchdog timer is cleared by reset transition at WDI (which can detect pulses as short as 50ns) ...

Page 10

... An optional 0.1µF bypass capacitor mounted close to V tional transient immunity. Ensuring Valid Reset Outputs Down to V The MAX6316_/MAX6317H/MAX6318_H/MAX6319_H/ MAX6321HP/MAX6322HP are guaranteed to operate properly down 1V. In applications that require CC valid reset levels down to V ...

Page 11

... RESET CC MAX6318 GND 2 GND MAX6321 RESET 3 4 WDI RESET SOT23 ______________________________________________________________________________________ 5-Pin µP Supervisory Circuits with Watchdog and Manual Reset Figure 10. Watchdog Flow Diagram MAX6317 WDI MANUAL RESET SOT23 MAX6319 2 MAX6322 SOT23 START SET WDI ...

Page 12

... MAX63___37_ _-T MAX63___36_ _-T MAX63___35_ _-T MAX63___34_ _-T MAX63___33_ _-T MAX63___32_ _-T MAX63___31_ _-T MAX63___30_ _-T MAX63___29_ _-T MAX63___28_ _-T MAX63___27_ _-T MAX63___26_ _-T MAX63___25_ _-T Table 2. Standard Versions RESET PART THRESHOLD (V) MAX6316LUK29CY-T 2.93 MAX6316LUK46CY-T 4.63 MAX6316MUK29CY-T 2.93 MAX6316MUK46CY-T 4.63 MAX6317HUK46CY-T 4.63 MAX6318LHUK46CY-T 4.63 MAX6318MHUK46CY-T 4.63 MAX6319LHUK46C-T 4.63 MAX6319MHUK46C-T 4.63 MAX6320PUK29CY-T 2.93 12 ______________________________________________________________________________________ T = +25°C A MIN TYP MAX 4.925 5.000 5.075 7.827 4.900 4.974 4 ...

Page 13

Supervisory Circuits with Table 2. Standard Versions (continued) RESET PART THRESHOLD (V) MAX6320PUK46CY-T 4.63 MAX6321HPUK46CY-T 4.63 MAX6322HPUK46C-T 4.63 Note: Thirteen standard versions are available, with a required order increment of 2500 pieces. Sample stock is generally held on ...

Page 14

Supervisory Circuits with Watchdog and Manual Reset REVISION REVISION NUMBER DATE 0 1/98 Initial release. 1 4/98 Update to show MAX6319 as an existing part. 2 7/98 Update specifications, Selector Guide, and Table 2. Include extended temperature range ...

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